[Fot] Header primary lengths

[Marx Christian tr4-racing]

I would think that a short pipe is the ideal combination of weight and
function.
Those engines in fighters and bombers had compressors to give the plane more
flight altitude.
With a compressor the ram effect of the exhaust is not really needed and on
the other hand this technic was very new then.
It is possible to design a ram effect on a single pipe too but as the F1
shows, using the other cylinders to help power output is the way to go.

Chris


----- Original Message -----
From: "Terry Stetler" <tlizzard at msn.com>
To: "Bill Babcock" <BillB at bnj.com>; "Michael Porter" <portermd at zianet.com>;
"Terry Stetler" <tlizzard at msn.com>
Cc: "SHANE Ingate" <hottr6 at hotmail.com>; <fot at autox.team.net>
Sent: Sunday, January 07, 2007 7:42 PM
Subject: Re: [Fot] Header primary lengths


>   An interesting aside to this discussion is the development of the last
> piston engined fighter aircraft at the end of WW2.  All of them, no matter
> what nation, had short, separate, exhaust stacks for each cylinder. Why? It
> was found that measurable ammounts of thrust could be obtained using this
> configuration, thus giving higher top speeds.  And all these engines
operated
> at speeds typically below 3000rpm.  Perhaps top fuel dragsters are seeing
some
> tractive gains by using their "zoomie" headers?
>
>   Terry Stetler
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