[Leica] IMG: From the Cigar Box- Al Williams' Gulf Hawk as Seenin1972

[hoppyman at bigpond.net.au (G Hopkinson)]

Jerry wins the prize for best aviation anecdote that I have read for a long 
time.
Cheers
Hoppy

-----Original Message-----
Subject: Re: [Leica] IMG: From the Cigar Box- Al Williams' Gulf Hawk as 
Seenin1972

Jim, 

I know what you mean by direction of flow!  Having flown cross country 
in a B-57A from Maryland to Alabama and the relief reservoir
overflowing,  I know why  the pilot dropped the  full  tank on  the 
designers desk at the Glenn  L Martin  Co.when he returned.

Jerry


Jim Nichols wrote:
> Jerry,
>
> At least, the venturi made one certain of the direction of flow when 
> using the relief horn. It appears to be similar to a normal 4-inch 
> venturi used for many years to provide adequate suction to spin up 
> artificial horizons and directional gyros for instrument flight. These 
> have all but disappeared with the advent of engine-driven vacuum 
> pumps, which are now being replaced with more modern reference 
> instruments.
>
> Jim Nichols
> Tullahoma, TN USA