Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > sci.physics > #582896 > unrolled thread

PV Dirigible Prop Alternative To Super Pressure

Back to article view | Back to sci.physics

Contents

  PV Dirigible Prop Alternative To Super Pressure Bret Cahill <bretcahill@aol.com> - 2016-06-04 12:47 -0700
    Re: PV Dirigible Prop Alternative To Super Pressure jimp@specsol.spam.sux.com - 2016-06-05 02:11 +0000
      Re: PV Dirigible Prop Alternative To Super Pressure Bret Cahill <bretcahill@aol.com> - 2016-06-04 22:22 -0700
        Re: PV Dirigible Prop Alternative To Super Pressure jimp@specsol.spam.sux.com - 2016-06-05 17:36 +0000
          Re: PV Dirigible Prop Alternative To Super Pressure Bret Cahill <bretcahill@aol.com> - 2016-06-05 13:52 -0700
            Re: PV Dirigible Prop Alternative To Super Pressure jimp@specsol.spam.sux.com - 2016-06-05 22:56 +0000
              Re: PV Dirigible Prop Alternative To Super Pressure Bret Cahill <bretcahill@aol.com> - 2016-06-08 00:57 -0700
                Re: PV Dirigible Prop Alternative To Super Pressure jimp@specsol.spam.sux.com - 2016-06-08 19:27 +0000
                  Re: PV Dirigible Prop Alternative To Super Pressure Mahipal <mahipal7638@gmail.com> - 2016-06-08 19:16 -0700
                    Re: PV Dirigible Prop Alternative To Super Pressure jimp@specsol.spam.sux.com - 2016-06-09 02:52 +0000
                      Re: PV Dirigible Prop Alternative To Super Pressure Mahipal <mahipal7638@gmail.com> - 2016-06-09 06:55 -0700
                        Re: PV Dirigible Prop Alternative To Super Pressure jimp@specsol.spam.sux.com - 2016-06-09 16:22 +0000
                          Re: PV Dirigible Prop Alternative To Super Pressure Mahipal <mahipal7638@gmail.com> - 2016-06-09 13:23 -0700
                            Re: PV Dirigible Prop Alternative To Super Pressure jimp@specsol.spam.sux.com - 2016-06-09 21:14 +0000
                              Re: PV Dirigible Prop Alternative To Super Pressure Mahipal <mahipal7638@gmail.com> - 2016-06-09 14:49 -0700
                              Re: PV Dirigible Prop Alternative To Super Pressure Bret Cahill <bretcahill@aol.com> - 2016-06-09 19:46 -0700
                                Re: PV Dirigible Prop Alternative To Super Pressure jimp@specsol.spam.sux.com - 2016-06-10 05:53 +0000
                                  Re: PV Dirigible Prop Alternative To Super Pressure Bret Cahill <bretcahill@aol.com> - 2016-06-10 10:07 -0700
                                    Re: PV Dirigible Prop Alternative To Super Pressure jimp@specsol.spam.sux.com - 2016-06-10 17:49 +0000
                                    Re: PV Dirigible Prop Alternative To Super Pressure jimp@specsol.spam.sux.com - 2016-06-10 21:22 +0000
                                      Re: PV Dirigible Prop Alternative To Super Pressure Bret Cahill <bretcahill@aol.com> - 2016-06-10 19:40 -0700
                                        Re: PV Dirigible Prop Alternative To Super Pressure jimp@specsol.spam.sux.com - 2016-06-11 05:00 +0000
                                          Re: PV Dirigible Prop Alternative To Super Pressure Bret Cahill <bretcahill@aol.com> - 2016-06-11 01:13 -0700
                                            Re: PV Dirigible Prop Alternative To Super Pressure jimp@specsol.spam.sux.com - 2016-06-11 17:38 +0000
    Re: PV Dirigible Prop Alternative To Super Pressure Bret Cahill <bretcahill@aol.com> - 2016-06-08 00:58 -0700
      Re: PV Dirigible Prop Alternative To Super Pressure noTthaTguY <abu.kuanysh05@gmail.com> - 2016-06-08 07:23 -0700
      Re: PV Dirigible Prop Alternative To Super Pressure Bret Cahill <bretcahill@aol.com> - 2016-06-08 14:18 -0700
        Re: PV Dirigible Prop Alternative To Super Pressure Sergio <invalid@invalid.com> - 2016-06-08 16:26 -0500
        Re: PV Dirigible Prop Alternative To Super Pressure jimp@specsol.spam.sux.com - 2016-06-08 21:41 +0000
          Re: PV Dirigible Prop Alternative To Super Pressure benj <nobodyxx@gmail> - 2016-06-08 20:23 -0400
            Re: PV Dirigible Prop Alternative To Super Pressure jimp@specsol.spam.sux.com - 2016-06-09 00:34 +0000
              Re: PV Dirigible Prop Alternative To Super Pressure benj <nobodyxx@gmail> - 2016-06-08 21:07 -0400
                Re: PV Dirigible Prop Alternative To Super Pressure "hanson" <hanson@quick.net> - 2016-06-08 19:22 -0700
                Re: PV Dirigible Prop Alternative To Super Pressure jimp@specsol.spam.sux.com - 2016-06-09 02:36 +0000
    Re: PV Dirigible Prop Alternative To Super Pressure Bret Cahill <bretcahill@aol.com> - 2016-06-08 14:42 -0700
      Re: PV Dirigible Prop Alternative To Super Pressure Bret Cahill <bretcahill@aol.com> - 2016-06-09 20:20 -0700
        Re: PV Dirigible Prop Alternative To Super Pressure Bret Cahill <bretcahill@aol.com> - 2016-06-10 10:10 -0700
          Re: PV Dirigible Prop Alternative To Super Pressure Bret Cahill <bretcahill@aol.com> - 2016-06-11 11:02 -0700
        Re: PV Dirigible Prop Alternative To Super Pressure Bret Cahill <bretcahill@aol.com> - 2016-06-10 20:11 -0700

Page 1 of 2  [1] 2  Next page →

#582896 — PV Dirigible Prop Alternative To Super Pressure

From a distance all you would see is the inflatable blimp like prop.

It would have no significant battery for overnight power.  Instead during the day it would power toward the earth like an upside down helicopter to retard the gain in altitude as the He expanded.

When it cooled at night the prop would auto rotate down to the lower altitude limit.

To eliminate the huge torque from a counter rotating prop the major vertical axis prop is powered by smaller tip mounted props like a pin wheel.

The Reynolds number would be yuge!


Bret Cahill

[toc] | [next] | [standalone]

#583007

Bret Cahill <bretcahill@aol.com> wrote:
> From a distance all you would see is the inflatable blimp like prop.

> It would have no significant battery for overnight power.  Instead during the day it would power toward the earth like an upside down helicopter to retard the gain in altitude as the He expanded.
> 
> When it cooled at night the prop would auto rotate down to the lower altitude limit.
> 
> To eliminate the huge torque from a counter rotating prop the major vertical axis prop is powered by smaller tip mounted props like a pin wheel.
> 
> The Reynolds number would be yuge!
> 
> 
> Bret Cahill
 
Why do soap bubbles and cannon balls have identical Reynold's numbers
but different aerodynamic characteristics?

 

-- 
Jim Pennino

[toc] | [prev] | [next] | [standalone]

#583066

> > From a distance all you would see is the inflatable blimp like prop.
> 
> > It would have no significant battery for overnight power.  Instead during the day it would power toward the earth like an upside down helicopter to retard the gain in altitude as the He expanded.
> > 
> > When it cooled at night the prop would auto rotate down to the lower altitude limit.
> > 
> > To eliminate the huge torque from a counter rotating prop the major vertical axis prop is powered by smaller tip mounted props like a pin wheel.
> > 
> > The Reynolds number would be yuge!
> > 
> > 
> > Bret Cahill
>  
> Why do soap bubbles and cannon balls have identical Reynold's numbers

Why do nut jobs think they have the same Reynolds numbers?

[toc] | [prev] | [next] | [standalone]

#583141

Bret Cahill <bretcahill@aol.com> wrote:
> 
>> > From a distance all you would see is the inflatable blimp like prop.
>> 
>> > It would have no significant battery for overnight power.  Instead during the day it would power toward the earth like an upside down helicopter to retard the gain in altitude as the He expanded.
>> > 
>> > When it cooled at night the prop would auto rotate down to the lower altitude limit.
>> > 
>> > To eliminate the huge torque from a counter rotating prop the major vertical axis prop is powered by smaller tip mounted props like a pin wheel.
>> > 
>> > The Reynolds number would be yuge!
>> > 
>> > 
>> > Bret Cahill
>>  
>> Why do soap bubbles and cannon balls have identical Reynold's numbers
> 
> Why do nut jobs think they have the same Reynolds numbers?
 
Why do kooks not understand that Reynolds number is determined by geometry
and a sphere is a sphere?


-- 
Jim Pennino

[toc] | [prev] | [next] | [standalone]

#583185

> >> > From a distance all you would see is the inflatable blimp like prop.
> >> 
> >> > It would have no significant battery for overnight power.  Instead during the day it would power toward the earth like an upside down helicopter to retard the gain in altitude as the He expanded.
> >> > 
> >> > When it cooled at night the prop would auto rotate down to the lower altitude limit.

> >> > To eliminate the huge torque from a counter rotating prop the major vertical axis prop is powered by smaller tip mounted props like a pin wheel.

> >> > The Reynolds number would be yuge!

> >> > Bret Cahill

> >> Why do soap bubbles and cannon balls have identical Reynold's numbers

> > Why do nut jobs think they have the same Reynolds numbers?
>  
> Why do kooks not understand that Reynolds number is determined by geometry
> and a sphere is a sphere?

Lunatics think soap bubbles are the same size and drop the same speed as cannon balls?

You dodged the question,

Here, try again:

Why do nut jobs think they have the same Reynolds numbers?

[toc] | [prev] | [next] | [standalone]

#583201

Bret Cahill <bretcahill@aol.com> wrote:
>> >> > From a distance all you would see is the inflatable blimp like prop.
>> >> 
>> >> > It would have no significant battery for overnight power.  Instead during the day it would power toward the earth like an upside down helicopter to retard the gain in altitude as the He expanded.
>> >> > 
>> >> > When it cooled at night the prop would auto rotate down to the lower altitude limit.
> 
>> >> > To eliminate the huge torque from a counter rotating prop the major vertical axis prop is powered by smaller tip mounted props like a pin wheel.
> 
>> >> > The Reynolds number would be yuge!
> 
>> >> > Bret Cahill
> 
>> >> Why do soap bubbles and cannon balls have identical Reynold's numbers
> 
>> > Why do nut jobs think they have the same Reynolds numbers?
>>  
>> Why do kooks not understand that Reynolds number is determined by geometry
>> and a sphere is a sphere?
> 
> Lunatics think soap bubbles are the same size and drop the same speed as
> cannon balls?

There is no reason you can not have identically sized soap bubbles and
cannon balls.

> You dodged the question,

Nope, YOU dodged the question.

> Here, try again:
> 
> Why do nut jobs think they have the same Reynolds numbers?

As Reynolds numbers are determined by geomentry, all shperes have the
same Reynolds number, kook.


-- 
Jim Pennino

[toc] | [prev] | [next] | [standalone]

#583776

> >> >> > From a distance all you would see is the inflatable blimp like prop.
> >> >> 
> >> >> > It would have no significant battery for overnight power.  Instead during the day it would power toward the earth like an upside down helicopter to retard the gain in altitude as the He expanded.
> >> >> > 
> >> >> > When it cooled at night the prop would auto rotate down to the lower altitude limit.
> > 
> >> >> > To eliminate the huge torque from a counter rotating prop the major vertical axis prop is powered by smaller tip mounted props like a pin wheel.
> > 
> >> >> > The Reynolds number would be yuge!
> > 
> >> >> > Bret Cahill
> > 
> >> >> Why do soap bubbles and cannon balls have identical Reynold's numbers
> > 
> >> > Why do nut jobs think they have the same Reynolds numbers?
> >>  
> >> Why do kooks not understand that Reynolds number is determined by geometry
> >> and a sphere is a sphere?
> > 
> > Lunatics think soap bubbles are the same size and drop the same speed as
> > cannon balls?
> 
> There is no reason you can not have identically sized soap bubbles and
> cannon balls.

The issue is balloons the size of football stadiums.

[toc] | [prev] | [next] | [standalone]

#583889

Bret Cahill <bretcahill@aol.com> wrote:
>> >> >> > From a distance all you would see is the inflatable blimp like prop.
>> >> >> 
>> >> >> > It would have no significant battery for overnight power.  Instead during the day it would power toward the earth like an upside down helicopter to retard the gain in altitude as the He expanded.
>> >> >> > 
>> >> >> > When it cooled at night the prop would auto rotate down to the lower altitude limit.
>> > 
>> >> >> > To eliminate the huge torque from a counter rotating prop the major vertical axis prop is powered by smaller tip mounted props like a pin wheel.
>> > 
>> >> >> > The Reynolds number would be yuge!
>> > 
>> >> >> > Bret Cahill
>> > 
>> >> >> Why do soap bubbles and cannon balls have identical Reynold's numbers
>> > 
>> >> > Why do nut jobs think they have the same Reynolds numbers?
>> >>  
>> >> Why do kooks not understand that Reynolds number is determined by geometry
>> >> and a sphere is a sphere?
>> > 
>> > Lunatics think soap bubbles are the same size and drop the same speed as
>> > cannon balls?
>> 
>> There is no reason you can not have identically sized soap bubbles and
>> cannon balls.
> 
> The issue is balloons the size of football stadiums.

As Reynolds number is determined by geometry, absolute size is irrelevant.

A piece of #11 shotgun shot (diamenter 0.06 inches) has the same
Reynolds number as a 200 yard diamenter round balloon.


-- 
Jim Pennino

[toc] | [prev] | [next] | [standalone]

#583996

On Wednesday, June 8, 2016 at 3:31:12 PM UTC-4, ji...@specsol.spam.sux.com wrote:
> Bret Cahill <bretcahill@aol.com> wrote:
> >> >> >> > From a distance all you would see is the inflatable blimp like prop.
> >> >> >> 
> >> >> >> > It would have no significant battery for overnight power.  Instead during the day it would power toward the earth like an upside down helicopter to retard the gain in altitude as the He expanded.
> >> >> >> > 
> >> >> >> > When it cooled at night the prop would auto rotate down to the lower altitude limit.
> >> > 
> >> >> >> > To eliminate the huge torque from a counter rotating prop the major vertical axis prop is powered by smaller tip mounted props like a pin wheel.
> >> > 
> >> >> >> > The Reynolds number would be yuge!
> >> > 
> >> >> >> > Bret Cahill
> >> > 
> >> >> >> Why do soap bubbles and cannon balls have identical Reynold's numbers
> >> > 
> >> >> > Why do nut jobs think they have the same Reynolds numbers?
> >> >>  
> >> >> Why do kooks not understand that Reynolds number is determined by geometry
> >> >> and a sphere is a sphere?
> >> > 
> >> > Lunatics think soap bubbles are the same size and drop the same speed as
> >> > cannon balls?
> >> 
> >> There is no reason you can not have identically sized soap bubbles and
> >> cannon balls.
> > 
> > The issue is balloons the size of football stadiums.
> 
> As Reynolds number is determined by geometry, absolute size is irrelevant.
> 
> A piece of #11 shotgun shot (diamenter 0.06 inches) has the same
> Reynolds number as a 200 yard diamenter round balloon.
> 
> -- 
> Jim Pennino

Sir JimJi, you are mistaken. Or you just misremember. Breathe. Slow down.

Reynolds Number is far more complicated than mere geometry. 
As it happens to be, Rutherford used this number to derive/validate
the value of the electronic charge. Relax a little bit Sir JimJi.

-- Mahipal “IPMM... माहिपाल ७६३८: d(me) != 0 ... me alwa(y)s changes...”

[toc] | [prev] | [next] | [standalone]

#584006

Mahipal <mahipal7638@gmail.com> wrote:
> On Wednesday, June 8, 2016 at 3:31:12 PM UTC-4, ji...@specsol.spam.sux.com wrote:
>> Bret Cahill <bretcahill@aol.com> wrote:
>> >> >> >> > From a distance all you would see is the inflatable blimp like prop.
>> >> >> >> 
>> >> >> >> > It would have no significant battery for overnight power.  Instead during the day it would power toward the earth like an upside down helicopter to retard the gain in altitude as the He expanded.
>> >> >> >> > 
>> >> >> >> > When it cooled at night the prop would auto rotate down to the lower altitude limit.
>> >> > 
>> >> >> >> > To eliminate the huge torque from a counter rotating prop the major vertical axis prop is powered by smaller tip mounted props like a pin wheel.
>> >> > 
>> >> >> >> > The Reynolds number would be yuge!
>> >> > 
>> >> >> >> > Bret Cahill
>> >> > 
>> >> >> >> Why do soap bubbles and cannon balls have identical Reynold's numbers
>> >> > 
>> >> >> > Why do nut jobs think they have the same Reynolds numbers?
>> >> >>  
>> >> >> Why do kooks not understand that Reynolds number is determined by geometry
>> >> >> and a sphere is a sphere?
>> >> > 
>> >> > Lunatics think soap bubbles are the same size and drop the same speed as
>> >> > cannon balls?
>> >> 
>> >> There is no reason you can not have identically sized soap bubbles and
>> >> cannon balls.
>> > 
>> > The issue is balloons the size of football stadiums.
>> 
>> As Reynolds number is determined by geometry, absolute size is irrelevant.
>> 
>> A piece of #11 shotgun shot (diamenter 0.06 inches) has the same
>> Reynolds number as a 200 yard diamenter round balloon.
>> 
>> -- 
>> Jim Pennino
> 
> Sir JimJi, you are mistaken. Or you just misremember. Breathe. Slow down.
> 
> Reynolds Number is far more complicated than mere geometry. 

Then why is the Reynolds number of any sphere, of any size, and of any
material always the same number?


-- 
Jim Pennino

[toc] | [prev] | [next] | [standalone]

#584060

On Wednesday, June 8, 2016 at 11:01:11 PM UTC-4, ji...@specsol.spam.sux.com wrote:
> Mahipal <mahipal7638@gmail.com> wrote:
> > On Wednesday, June 8, 2016 at 3:31:12 PM UTC-4, ji...@specsol.spam.sux.com wrote:
> >> Bret Cahill <bretcahill@aol.com> wrote:
> >> >> >> >> > From a distance all you would see is the inflatable blimp like prop.
> >> >> >> >> 
> >> >> >> >> > It would have no significant battery for overnight
> >> >> >> >> > power.  Instead during the day it would power toward
> >> >> >> >> > the earth like an upside down helicopter to retard the
> >> >> >> >> > gain in altitude as the He expanded.

> >> >> >> >> > When it cooled at night the prop would auto rotate
> >> >> > down to the lower altitude limit.

> >> >> >> >> > To eliminate the huge torque from a counter rotating
> >> >> > prop the major vertical axis prop is powered by smaller tip
> >> >> > mounted props like a pin wheel.

> >> >> >> >> > The Reynolds number would be yuge!
> >> >> > 
> >> >> >> >> > Bret Cahill
> >> >> > 
> >> >> >> >> Why do soap bubbles and cannon balls have identical Reynold's numbers
> >> >> > 
> >> >> >> > Why do nut jobs think they have the same Reynolds numbers?
> >> >> >>  
> >> >> >> Why do kooks not understand that Reynolds number is determined by geometry
> >> >> >> and a sphere is a sphere?
> >> >> > 
> >> >> > Lunatics think soap bubbles are the same size and drop the same speed as
> >> >> > cannon balls?
> >> >> 
> >> >> There is no reason you can not have identically sized soap bubbles and
> >> >> cannon balls.
> >> > 
> >> > The issue is balloons the size of football stadiums.
> >> 
> >> As Reynolds number is determined by geometry, absolute size is irrelevant.
> >> 
> >> A piece of #11 shotgun shot (diamenter 0.06 inches) has the same
> >> Reynolds number as a 200 yard diamenter round balloon.
> >> 
> >> -- 
> >> Jim Pennino
> > 
> > Sir JimJi, you are mistaken. Or you just misremember. Breathe. Slow down.
> > 
> > Reynolds Number is far more complicated than mere geometry. 
> 
> Then why is the Reynolds number of any sphere, of any size, and of any
> material always the same number?

One must take into account more than mere shape/geometry.

JimJi, it is not so. Besides, numbers matter not, much.
Bubbles are not cannons. Last time I saw people get killed via
bubbles, was perhaps a Games Of Thrones rerun. Much sex scenes.

Sk(y) Pilot Sir JimJi, surf Surf SURF and come to shore...
I love your writings, wish I could be so terse/concise/accurate as you JimJi.

What I may add for meself? I played with marbles. As a child, I did. 
And with bubbles too. Then, in school/college, I dealt with Re# > 2000.

So... back to topic, must at some time, right? Anyway...

The Reynolds number is defined as the ratio of inertial forces to
viscous forces. Geometry, 3D and all that, is a minor, however
significant, factor. I can't show my books, but do just realtime search...

Restudy Ernest Rutherford, amazing man.

> -- 
> Jim Pennino

-- Mahipal “IPMM... माहिपाल ७६३८: d(me) != 0 ... me alwa(y)s changes...”

[toc] | [prev] | [next] | [standalone]

#584081

Mahipal <mahipal7638@gmail.com> wrote:
> On Wednesday, June 8, 2016 at 11:01:11 PM UTC-4, ji...@specsol.spam.sux.com wrote:
>> Mahipal <mahipal7638@gmail.com> wrote:
>> > On Wednesday, June 8, 2016 at 3:31:12 PM UTC-4, ji...@specsol.spam.sux.com wrote:
>> >> Bret Cahill <bretcahill@aol.com> wrote:
>> >> >> >> >> > From a distance all you would see is the inflatable blimp like prop.
>> >> >> >> >> 
>> >> >> >> >> > It would have no significant battery for overnight
>> >> >> >> >> > power.  Instead during the day it would power toward
>> >> >> >> >> > the earth like an upside down helicopter to retard the
>> >> >> >> >> > gain in altitude as the He expanded.
> 
>> >> >> >> >> > When it cooled at night the prop would auto rotate
>> >> >> > down to the lower altitude limit.
> 
>> >> >> >> >> > To eliminate the huge torque from a counter rotating
>> >> >> > prop the major vertical axis prop is powered by smaller tip
>> >> >> > mounted props like a pin wheel.
> 
>> >> >> >> >> > The Reynolds number would be yuge!
>> >> >> > 
>> >> >> >> >> > Bret Cahill
>> >> >> > 
>> >> >> >> >> Why do soap bubbles and cannon balls have identical Reynold's numbers
>> >> >> > 
>> >> >> >> > Why do nut jobs think they have the same Reynolds numbers?
>> >> >> >>  
>> >> >> >> Why do kooks not understand that Reynolds number is determined by geometry
>> >> >> >> and a sphere is a sphere?
>> >> >> > 
>> >> >> > Lunatics think soap bubbles are the same size and drop the same speed as
>> >> >> > cannon balls?
>> >> >> 
>> >> >> There is no reason you can not have identically sized soap bubbles and
>> >> >> cannon balls.
>> >> > 
>> >> > The issue is balloons the size of football stadiums.
>> >> 
>> >> As Reynolds number is determined by geometry, absolute size is irrelevant.
>> >> 
>> >> A piece of #11 shotgun shot (diamenter 0.06 inches) has the same
>> >> Reynolds number as a 200 yard diamenter round balloon.
>> >> 
>> >> -- 
>> >> Jim Pennino
>> > 
>> > Sir JimJi, you are mistaken. Or you just misremember. Breathe. Slow down.
>> > 
>> > Reynolds Number is far more complicated than mere geometry. 
>> 
>> Then why is the Reynolds number of any sphere, of any size, and of any
>> material always the same number?
> 
> One must take into account more than mere shape/geometry.

Then why is the Reynolds number of any sphere, of any size, and of any
material always the same number?


-- 
Jim Pennino

[toc] | [prev] | [next] | [standalone]

#584113

On Thursday, June 9, 2016 at 12:31:05 PM UTC-4, ji...@specsol.spam.sux.com wrote:
> Mahipal <mahipal7638@gmail.com> wrote:
> > On Wednesday, June 8, 2016 at 11:01:11 PM UTC-4, ji...@specsol.spam.sux.com wrote:
> >> Mahipal <mahipal7638@gmail.com> wrote:
> >> > On Wednesday, June 8, 2016 at 3:31:12 PM UTC-4, ji...@specsol.spam.sux.com wrote:
> >> >> Bret Cahill <bretcahill@aol.com> wrote:
> >> >> >> >> >> > From a distance all you would see is the inflatable blimp like prop.
> >> >> >> >> >> 
> >> >> >> >> >> > It would have no significant battery for overnight
> >> >> >> >> >> > power.  Instead during the day it would power toward
> >> >> >> >> >> > the earth like an upside down helicopter to retard the
> >> >> >> >> >> > gain in altitude as the He expanded.
> > 
> >> >> >> >> >> > When it cooled at night the prop would auto rotate
> >> >> >> > down to the lower altitude limit.
> > 
> >> >> >> >> >> > To eliminate the huge torque from a counter rotating
> >> >> >> > prop the major vertical axis prop is powered by smaller tip
> >> >> >> > mounted props like a pin wheel.
> > 
> >> >> >> >> >> > The Reynolds number would be yuge!
> >> >> >> > 
> >> >> >> >> >> > Bret Cahill
> >> >> >> > 
> >> >> >> >> >> Why do soap bubbles and cannon balls have identical Reynold's numbers
> >> >> >> > 
> >> >> >> >> > Why do nut jobs think they have the same Reynolds numbers?
> >> >> >> >>  
> >> >> >> >> Why do kooks not understand that Reynolds number is determined by geometry
> >> >> >> >> and a sphere is a sphere?
> >> >> >> > 
> >> >> >> > Lunatics think soap bubbles are the same size and drop the same speed as
> >> >> >> > cannon balls?
> >> >> >> 
> >> >> >> There is no reason you can not have identically sized soap bubbles and
> >> >> >> cannon balls.
> >> >> > 
> >> >> > The issue is balloons the size of football stadiums.
> >> >> 
> >> >> As Reynolds number is determined by geometry, absolute size is irrelevant.
> >> >> 
> >> >> A piece of #11 shotgun shot (diamenter 0.06 inches) has the same
> >> >> Reynolds number as a 200 yard diamenter round balloon.
> >> >> 
> >> >> -- 
> >> >> Jim Pennino
> >> > 
> >> > Sir JimJi, you are mistaken. Or you just misremember. Breathe. Slow down.
> >> > 
> >> > Reynolds Number is far more complicated than mere geometry. 
> >> 
> >> Then why is the Reynolds number of any sphere, of any size, and of any
> >> material always the same number?
> > 
> > One must take into account more than mere shape/geometry.
> 
> Then why is the Reynolds number of any sphere, of any size, and of any
> material always the same number? 
> -- 
> Jim Pennino

Sir JimJi, please repost your actual response. Mistakes do happen...

-- Mahipal “IPMM... माहिपाल ७६३८: d(me) != 0 ... me alwa(y)s changes...”  

[toc] | [prev] | [next] | [standalone]

#584118

Mahipal <mahipal7638@gmail.com> wrote:
> On Thursday, June 9, 2016 at 12:31:05 PM UTC-4, ji...@specsol.spam.sux.com wrote:
>> Mahipal <mahipal7638@gmail.com> wrote:
>> > On Wednesday, June 8, 2016 at 11:01:11 PM UTC-4, ji...@specsol.spam.sux.com wrote:
>> >> Mahipal <mahipal7638@gmail.com> wrote:
>> >> > On Wednesday, June 8, 2016 at 3:31:12 PM UTC-4, ji...@specsol.spam.sux.com wrote:
>> >> >> Bret Cahill <bretcahill@aol.com> wrote:
>> >> >> >> >> >> > From a distance all you would see is the inflatable blimp like prop.
>> >> >> >> >> >> 
>> >> >> >> >> >> > It would have no significant battery for overnight
>> >> >> >> >> >> > power.  Instead during the day it would power toward
>> >> >> >> >> >> > the earth like an upside down helicopter to retard the
>> >> >> >> >> >> > gain in altitude as the He expanded.
>> > 
>> >> >> >> >> >> > When it cooled at night the prop would auto rotate
>> >> >> >> > down to the lower altitude limit.
>> > 
>> >> >> >> >> >> > To eliminate the huge torque from a counter rotating
>> >> >> >> > prop the major vertical axis prop is powered by smaller tip
>> >> >> >> > mounted props like a pin wheel.
>> > 
>> >> >> >> >> >> > The Reynolds number would be yuge!
>> >> >> >> > 
>> >> >> >> >> >> > Bret Cahill
>> >> >> >> > 
>> >> >> >> >> >> Why do soap bubbles and cannon balls have identical Reynold's numbers
>> >> >> >> > 
>> >> >> >> >> > Why do nut jobs think they have the same Reynolds numbers?
>> >> >> >> >>  
>> >> >> >> >> Why do kooks not understand that Reynolds number is determined by geometry
>> >> >> >> >> and a sphere is a sphere?
>> >> >> >> > 
>> >> >> >> > Lunatics think soap bubbles are the same size and drop the same speed as
>> >> >> >> > cannon balls?
>> >> >> >> 
>> >> >> >> There is no reason you can not have identically sized soap bubbles and
>> >> >> >> cannon balls.
>> >> >> > 
>> >> >> > The issue is balloons the size of football stadiums.
>> >> >> 
>> >> >> As Reynolds number is determined by geometry, absolute size is irrelevant.
>> >> >> 
>> >> >> A piece of #11 shotgun shot (diamenter 0.06 inches) has the same
>> >> >> Reynolds number as a 200 yard diamenter round balloon.
>> >> >> 
>> >> >> -- 
>> >> >> Jim Pennino
>> >> > 
>> >> > Sir JimJi, you are mistaken. Or you just misremember. Breathe. Slow down.
>> >> > 
>> >> > Reynolds Number is far more complicated than mere geometry. 
>> >> 
>> >> Then why is the Reynolds number of any sphere, of any size, and of any
>> >> material always the same number?
>> > 
>> > One must take into account more than mere shape/geometry.
>> 
>> Then why is the Reynolds number of any sphere, of any size, and of any
>> material always the same number? 
>> -- 
>> Jim Pennino
> 
> Sir JimJi, please repost your actual response. Mistakes do happen...
> 
> -- Mahipal “IPMM... माहिपाल ७६३८: d(me) != 0 ... me alwa(y)s changes...”  

For the third time, why is the Reynolds number of any sphere, of any size,
and of any material always the same number?


-- 
Jim Pennino

[toc] | [prev] | [next] | [standalone]

#584122

On Thursday, June 9, 2016 at 5:16:06 PM UTC-4, ji...@specsol.spam.sux.com wrote:
> Mahipal <mahipal7638@gmail.com> wrote:
> > On Thursday, June 9, 2016 at 12:31:05 PM UTC-4, ji...@specsol.spam.sux.com wrote:
> >> Mahipal <mahipal7638@gmail.com> wrote:
> >> > On Wednesday, June 8, 2016 at 11:01:11 PM UTC-4, ji...@specsol.spam.sux.com wrote:
> >> >> Mahipal <mahipal7638@gmail.com> wrote:
> >> >> > On Wednesday, June 8, 2016 at 3:31:12 PM UTC-4, ji...@specsol.spam.sux.com wrote:
> >> >> >> Bret Cahill <bretcahill@aol.com> wrote:
> >> >> >> >> >> >> > From a distance all you would see is the inflatable blimp like prop.
> >> >> >> >> >> >> 
> >> >> >> >> >> >> > It would have no significant battery for overnight
> >> >> >> >> >> >> > power.  Instead during the day it would power toward
> >> >> >> >> >> >> > the earth like an upside down helicopter to retard the
> >> >> >> >> >> >> > gain in altitude as the He expanded.
> >> > 
> >> >> >> >> >> >> > When it cooled at night the prop would auto rotate
> >> >> >> >> > down to the lower altitude limit.
> >> > 
> >> >> >> >> >> >> > To eliminate the huge torque from a counter rotating
> >> >> >> >> > prop the major vertical axis prop is powered by smaller tip
> >> >> >> >> > mounted props like a pin wheel.
> >> > 
> >> >> >> >> >> >> > The Reynolds number would be yuge!
> >> >> >> >> > 
> >> >> >> >> >> >> > Bret Cahill
> >> >> >> >> > 
> >> >> >> >> >> >> Why do soap bubbles and cannon balls have identical Reynold's numbers
> >> >> >> >> > 
> >> >> >> >> >> > Why do nut jobs think they have the same Reynolds numbers?
> >> >> >> >> >>  
> >> >> >> >> >> Why do kooks not understand that Reynolds number is determined by geometry
> >> >> >> >> >> and a sphere is a sphere?
> >> >> >> >> > 
> >> >> >> >> > Lunatics think soap bubbles are the same size and drop the same speed as
> >> >> >> >> > cannon balls?
> >> >> >> >> 
> >> >> >> >> There is no reason you can not have identically sized soap bubbles and
> >> >> >> >> cannon balls.
> >> >> >> > 
> >> >> >> > The issue is balloons the size of football stadiums.
> >> >> >> 
> >> >> >> As Reynolds number is determined by geometry, absolute size is irrelevant.
> >> >> >> 
> >> >> >> A piece of #11 shotgun shot (diamenter 0.06 inches) has the same
> >> >> >> Reynolds number as a 200 yard diamenter round balloon.
> >> >> >> 
> >> >> >> -- 
> >> >> >> Jim Pennino
> >> >> > 
> >> >> > Sir JimJi, you are mistaken. Or you just misremember. Breathe. Slow down.
> >> >> > 
> >> >> > Reynolds Number is far more complicated than mere geometry. 
> >> >> 
> >> >> Then why is the Reynolds number of any sphere, of any size, and of any
> >> >> material always the same number?
> >> > 
> >> > One must take into account more than mere shape/geometry.
> >> 
> >> Then why is the Reynolds number of any sphere, of any size, and of any
> >> material always the same number? 
> >> -- 
> >> Jim Pennino
> > 
> > Sir JimJi, please repost your actual response. Mistakes do happen...
> > 
> > -- Mahipal “IPMM... माहिपाल ७६३८: d(me) != 0 ... me alwa(y)s changes...”  
> 
> For the third time, why is the Reynolds number of any sphere, of any size,
> and of any material always the same number?

That's not true for any sphere, as far as I remember. Does it change anything?

Stop counting Sir JimJi, I could give you facts that would spin your head.

Mostly, not all objects are spherical. Yes, we can assume them to be.

While you raise a good point, the Re# is not as simplistic as you state.
My books are away from me now, and I resist doing a WWW search. Tired I.

> -- 
> Jim Pennino

-- Mahipal “IPMM... माहिपाल ७६३८: d(me) != 0 ... me alwa(y)s changes...”

https://www.youtube.com/watch?v=bsw0k_tXFyQ 
Mai Tou Har Mod par - Mukesh - Chetna (1970)
https://www.youtube.com/watch?v=69kTbYNZvtY
Cat Stevens - Wild World w/ lyrics

[toc] | [prev] | [next] | [standalone]

#584153

> For the third time, why is the Reynolds number of any sphere, of any size,
> and of any material always the same number?

If the diameter or "characteristic dimension" is larger or smaller, you get a larger or smaller Nre.

If the velocity in inversely proportional to diameter then the Nre is the same for all sizes of that shape in that fluid, i.e. a golf ball going 300 km/hr has the same Nre as a cyclist helmet going 30 km/hr and the air holes in the helmet actually _reduce_ drag like the dimples on the golf ball reduce drag.

Maybe you meant the Reynolds number can be applied to any size object.

[toc] | [prev] | [next] | [standalone]

#584192

Bret Cahill <bretcahill@aol.com> wrote:
>> For the third time, why is the Reynolds number of any sphere, of any size,
>> and of any material always the same number?
> 
> If the diameter or "characteristic dimension" is larger or smaller, you get a larger or smaller Nre.
> 
> If the velocity in inversely proportional to diameter then the Nre is the same for all sizes of that shape in that fluid, i.e. a golf ball going 300 km/hr has the same Nre as a cyclist helmet going 30 km/hr and the air holes in the helmet actually _reduce_ drag like the dimples on the golf ball reduce drag.
> 
> Maybe you meant the Reynolds number can be applied to any size object.
 
The Reynolds number is directly proportional to the diameter of the
cross section, so the comment about size is incorrect.

Equal sized spheres, no matter the material, be they soap bubbles or lead,
have the same Reynolds number.



-- 
Jim Pennino

[toc] | [prev] | [next] | [standalone]

#584216

> >> For the third time, why is the Reynolds number of any sphere, of any size,
> >> and of any material always the same number?
> > 
> > If the diameter or "characteristic dimension" is larger or smaller, you get a larger or smaller Nre.
> > 
> > If the velocity in inversely proportional to diameter then the Nre is the same for all sizes of that shape in that fluid, i.e. a golf ball going 300 km/hr has the same Nre as a cyclist helmet going 30 km/hr and the air holes in the helmet actually _reduce_ drag like the dimples on the golf ball reduce drag.
> > 
> > Maybe you meant the Reynolds number can be applied to any size object.
>  
> The Reynolds number is directly proportional to the diameter of the
> cross section, so the comment about size is incorrect.
> 
> Equal sized spheres, no matter the material, be they soap bubbles or lead,
> have the same Reynolds number.

The speeds would need to be the same as well, a rare coincidence because soap bubbles always move slowly w/ respect to wind speed.

Shot almost always move fast or not at all.

Care to try again?

[toc] | [prev] | [next] | [standalone]

#584220

Bret Cahill <bretcahill@aol.com> wrote:
>> >> For the third time, why is the Reynolds number of any sphere, of any size,
>> >> and of any material always the same number?
>> > 
>> > If the diameter or "characteristic dimension" is larger or smaller, you get a larger or smaller Nre.
>> > 
>> > If the velocity in inversely proportional to diameter then the Nre is the same for all sizes of that shape in that fluid, i.e. a golf ball going 300 km/hr has the same Nre as a cyclist helmet going 30 km/hr and the air holes in the helmet actually _reduce_ drag like the dimples on the golf ball reduce drag.
>> > 
>> > Maybe you meant the Reynolds number can be applied to any size object.
>>  
>> The Reynolds number is directly proportional to the diameter of the
>> cross section, so the comment about size is incorrect.
>> 
>> Equal sized spheres, no matter the material, be they soap bubbles or lead,
>> have the same Reynolds number.
> 
> The speeds would need to be the same as well, a rare coincidence because
> soap bubbles always move slowly w/ respect to wind speed.

So aerodynamics is not totally due to Reynolds number.

QED.


-- 
Jim Pennino

[toc] | [prev] | [next] | [standalone]

#584269

Bret Cahill <bretcahill@aol.com> wrote:
>> >> For the third time, why is the Reynolds number of any sphere, of any size,
>> >> and of any material always the same number?
>> > 
>> > If the diameter or "characteristic dimension" is larger or smaller, you get a larger or smaller Nre.
>> > 
>> > If the velocity in inversely proportional to diameter then the Nre is the same for all sizes of that shape in that fluid, i.e. a golf ball going 300 km/hr has the same Nre as a cyclist helmet going 30 km/hr and the air holes in the helmet actually _reduce_ drag like the dimples on the golf ball reduce drag.
>> > 
>> > Maybe you meant the Reynolds number can be applied to any size object.
>>  
>> The Reynolds number is directly proportional to the diameter of the
>> cross section, so the comment about size is incorrect.
>> 
>> Equal sized spheres, no matter the material, be they soap bubbles or lead,
>> have the same Reynolds number.
> 
> The speeds would need to be the same as well, a rare coincidence because
> soap bubbles always move slowly w/ respect to wind speed.

As the Reynolds number is directly proportional to velocity, comparing
Reynolds numbers at differing speeds is at best pointless and at worst
plain idiotic.

-- 
Jim Pennino

[toc] | [prev] | [next] | [standalone]

Page 1 of 2  [1] 2  Next page →

Back to top | Article view | sci.physics

csiph-web