<VV> Gas freezing?

[J. R. Read]

Sorry, I'll try to be more clear on my calcs.  Starting with 70F at sea 
level and using the "rule of thumb" (strange expression) of a drop of 3F for 
each 1,000 feet of altitude, the temp at 50,000 feet would be around -80F. 
>From sea level to 50,000 at 3F per 1,000 feet the temp will drop by 150F or 
so.  Subtracting the 70F at sea level, you end up at -80F at 50,000.  If the 
rule of thumb is off a bit from the 3F drop, then the appropriate adjustment 
needs to be made.

Once again - not a real likely altitude for a piston engine, but even 20,000 
feet would give you a temp around +10F and little air for breathing or the 
engine.  I think that we are in agreement that freezing fuel would not be 
the main problem.

Later, JR

----- Original Message ----- 
From: <aeroned at aol.com>
To: <virtualvairs at corvair.org>

Sent: Wednesday, December 25, 2013 12:30 PM
Subject: Re: <VV> Non-Corvair Specific: Gas freezing?


>
> OK JR, at 50000 feet it's -69F not quite -97 or -80 but I suppose it's 
> close enough?
>
>
> -----Original Message-----
> From: J. R. Read <hmlinc at sbcglobal.net>
> To: virtualvairs <virtualvairs at corvair.org>; aeroned <aeroned at aol.com>
> Sent: Tue, Dec 24, 2013 10:11 am
> Subject: Re: <VV> Non-Corvair Specific: Gas freezing?
>
>
> Probably more like 50,000 feet.  Still a problem.
> Later, JR
>
> ----- Original Message ----- 
> From: <aeroned at aol.com>
> To: <virtualvairs at corvair.org>
> Sent: Tuesday, December 24, 2013 9:47 AM
> Subject: Re: <VV> Non-Corvair Specific: Gas freezing?
>
>
>>
>> I don't know where Matt's flying his piston aircraft, but -80F would be 
>> up
>> around 250,000 feet (outer space).
>> http://www.engineeringtoolbox.com/standard-atmosphere-d_604.html
>>
>> At that altitude freezing gas would be the least of your troubles.
>>
>> Ned
>>


---
This email is free from viruses and malware because avast! Antivirus protection is active.
http://www.avast.com