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Re: Technology's role in a climate solution

Cross-posted to 2 groups.

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In sci.physics kefischer <emoneyjoe@iglou.com> wrote:
> On Thu, 12 Nov 2015 21:40:20 -0000, jimp@specsol.spam.sux.com wrote:
> 
>>In sci.physics kefischer <emoneyjoe@iglou.com> wrote:
>>> On Thu, 12 Nov 2015 19:47:01 +0100, Poutnik <Poutnik4NNTP@gmail.com>
>>> wrote:
>>> 
>>>>On 11/12/2015 05:09 PM, Ludwig Böhm wrote:
>>>>> Poutnik wrote:
>>>>> 
>>>>>>>> Airliners have fuel efficiency about 2-3 L/seat/100km.
>>>>>>>> ( Many people are not aware of the flying is more energy efficient
>>>>>>>> than 1 person car driving  )
>>>>>>>> https://en.wikipedia.org/wiki/Fuel_economy_in_aircraft#Example_Values
>>>>>>>
>>>>>>> Has nothing to do with your litres. As I can see is about solar power.
>>>>>>> Nowhere to use litres.
>>>>>>
>>>>>> As rate of spent fuel volume is *closely* related to required solar
>>>>>> power.
>>>>> 
>>>>> Of course not. Same way you may say is *closely* related to cubic meters 
>>>>> etc. A solar powered device or machine is NOT using litres anywhere in 
>>>>> their particular configuration.
>>>>> 
>>>>
>>>>What does say the term equivalence to you ?
>>>>
>>>>1 Litre of kerosene contains roughly 40 MJ of chemical energy.
>>>>Spending rate 1 L/s is equivalent to providing power about 40 MW.
>>>>
>>>>Any solar based solution with comparable power and efficiency
>>>>of used engines hasa to provide equivalent power
>>>>comparable to fuel rate.
>>> 
>>>         40 MW is about 50,000 HP,
>>> the most solar an airliner could collect
>>> is about  40 KW.
>>> 
>>>         The power needed has confused
>>> even engineers (I think), the atomic 
>>> powered bomber reactors were only
>>> about 2 megawatt, the power of the
>>> gasoline reciprocating engines on 
>>> the B-36 were about 3000 HP each,
>>> or more than 2 megawatt, and the
>>> B-36 had 6 or 8 of them, so how
>>> could a B-36 be powered with
>>> 2 megawatt reactors?
>>> 
>>
>>The reactor in the NB-36H was 3MW and did not power anything; it was
>>just a test of shielding.
>>
>>The same goes for the Soviet Tu-119 program.
>>
>>No nuclear powered airplane has flown.
> 
>         My point was that 2 or 3 megawatt is not
> enough power to propel a B-36 size aircraft
> at 200 MPH, nowhere near enough.

It isn't enough to do much more than taxi.

>         The R-4360 was well over 3000 HP,
> that is 3000 * 746 watts, or 2,238,000 watts,
> (2.238 megawatts each engine), and the
> B-36 had 6 of those engines.

Actually 3,800 HP.

> https://www.youtube.com/watch?v=Tgur50yMHwE
> 
> http://www.pw.utc.com/R4360_Wasp_Major_Engine
> 
>        The jet engines probably produced about 4000 HP
> each, so the 10 petroleum engines produced the equivalent
> of about  30 megawatts.

The jets produced about 6,000 lbf of thrust and were used for takeoff.

>        The plane was dog with that power, what would
> it been like with 3 megawatts, which may have been
> 3 megawatt thermal, I'm not sure if that even equates
> to 4000 HP in practice, and it's probably certain the
> plane was not planned to have more than one.     

Again, the reactor was there ONLY to test shielding.
 
>         3 Megawatts sounds like a lot, but many piston
> engine airplanes had more equivalent power than that.

And still do, but new engines over about 500 HP ( .37 MW) are these
days turbines; the day of the huge radial has pasted. 

-- 
Jim Pennino

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Re: Technology's role in a climate solution Edgardo Alcantara <edgardoalcantara@carosseryrepair.org> - 2015-11-07 14:16 +0000
  Re: Technology's role in a climate solution jimp@specsol.spam.sux.com - 2015-11-07 18:42 +0000
    Re: Technology's role in a climate solution Edgardo Alcantara <edgardoalcantara@carosseryrepair.org> - 2015-11-08 00:50 +0000
      Re: Technology's role in a climate solution Poutnik <poutnik4nntp@gmail.com> - 2015-11-08 08:45 +0100
        Re: Technology's role in a climate solution Poutnik <poutnik4nntp@gmail.com> - 2015-11-08 17:56 +0100
        Re: Technology's role in a climate solution Ludwig Böhm <ludwb@widespectrum.com> - 2015-11-11 23:58 +0000
          Re: Technology's role in a climate solution Poutnik <poutnik4nntp@gmail.com> - 2015-11-12 08:02 +0100
            Re: Technology's role in a climate solution Ludwig Böhm <ludwb@widespectrum.com> - 2015-11-12 16:09 +0000
              Re: Technology's role in a climate solution Poutnik <Poutnik4NNTP@gmail.com> - 2015-11-12 19:47 +0100
                Re: Technology's role in a climate solution jimp@specsol.spam.sux.com - 2015-11-12 19:38 +0000
                Re: Technology's role in a climate solution Ludwig Böhm <ludwb@widespectrum.com> - 2015-11-12 19:58 +0000
                Re: Technology's role in a climate solution Ludwig Böhm <ludwb@widespectrum.com> - 2015-11-12 19:52 +0000
                Re: Technology's role in a climate solution jimp@specsol.spam.sux.com - 2015-11-12 20:07 +0000
                Re: Technology's role in a climate solution Ludwig Böhm <ludwb@widespectrum.com> - 2015-11-12 21:28 +0000
                Re: Technology's role in a climate solution jimp@specsol.spam.sux.com - 2015-11-12 21:32 +0000
                Re: Technology's role in a climate solution Ludwig Böhm <ludwb@widespectrum.com> - 2015-11-12 22:20 +0000
                Re: Technology's role in a climate solution jimp@specsol.spam.sux.com - 2015-11-12 23:02 +0000
                Re: Technology's role in a climate solution Poutnik <poutnik4nntp@gmail.com> - 2015-11-12 21:59 +0100
                Re: Technology's role in a climate solution Ludwig Böhm <ludwb@widespectrum.com> - 2015-11-12 21:26 +0000
                Re: Technology's role in a climate solution kefischer <emoneyjoe@iglou.com> - 2015-11-12 16:05 -0500
                Re: Technology's role in a climate solution jimp@specsol.spam.sux.com - 2015-11-12 21:40 +0000
                Re: Technology's role in a climate solution kefischer <emoneyjoe@iglou.com> - 2015-11-12 18:01 -0500
                Re: Technology's role in a climate solution jimp@specsol.spam.sux.com - 2015-11-12 23:29 +0000
                Re: Technology's role in a climate solution kefischer <emoneyjoe@iglou.com> - 2015-11-12 20:20 -0500
                Re: Technology's role in a climate solution jimp@specsol.spam.sux.com - 2015-11-13 01:49 +0000
                Re: Technology's role in a climate solution kefischer <emoneyjoe@iglou.com> - 2015-11-12 22:35 -0500
                Re: Technology's role in a climate solution jimp@specsol.spam.sux.com - 2015-11-13 04:39 +0000
            Re: Technology's role in a climate solution benj <none@gmail.com> - 2015-11-12 13:10 -0500
      Re: Technology's role in a climate solution jimp@specsol.spam.sux.com - 2015-11-08 17:30 +0000

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