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Posted By: Bruce Gibbins
Posted On: Friday November 30, 2018 at 11:04 PM
 
Message:
Miss Shilling's Oriface. Warning! A touch of Military Humor.

During the Battle of France and Battle of Britain in 1940, RAF pilots discovered a serious problem in fighter planes with Merlin engines, such as the Hurricane and Spitfire. When the plane went nose-down to begin a dive, the resulting negative g-force would flood the engine's carburettor, causing the engine to stall.

German fighters used fuel injection engines and did not have this problem. So in action, a German fighter could evade a pursuing RAF fighter by flying a negative g manoeuvre which the RAF plane could not follow.

Beatrice Shilling devised the R.A.E. restrictor to solve this problem. It was a brass thimble with a hole in the middle (later further refined to a flat washer), which could be fitted into the engine's carburettor without taking the aircraft out of service. The restrictor limited maximum fuel flow and prevented flooding. By March 1941, she had led a small team on a tour of RAF fighter stations, installing the devices in their Merlin engines. The restrictor was immensely popular with pilots, who affectionately named it 'Miss Shilling's orifice' or 'Miss Tilly's diaphragm.' It continued in use as a stop-gap until the introduction of the pressure carburetor in 1943

Beatrice Shilling astride her racing Norton.

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Message thread:

Regarding post #39620 below...and the comments that were added to it. The discussion by George Schire #39640
Good For You George by Bob Lasagna #39640.1
I know I'm one of the ones that is sick and tired of it - & George by Dennis Mong #39640.1.1
+1 I agree! (EOM) by John Roberts #39640.1.2
Miss Shilling's Oriface. Warning! A touch of Military Humor. by Bruce Gibbins #39640.2
Very cool that back then a woman solved this very important issue. (EOM) by Jack Dodds #39640.2.1
I always am stunned by the management team that makes such inane by Jack Dodds #39640.3
Today everything is structured to make everything GOOD for the "weakest link" or the individual. (EOM) by Bruce Parsons #39640.4
Oh man Bruce, does your comment sum it up nicely. Couldn't agree with you more. (EOM) by George Schire #39640.4.1
I'm with you 100% on this , George!!! More could be added, but I'll stop here! (EOM) by steve kiraly #39640.5
If you let PC continue unchallenged in time you eventually lose your culture. (EOM) by Jack Dodds #39640.6
I'am with you 100% George. Thanks, well said. by Dick Johnson #39640.7
God Bless you Dick Johnson! I do and agree with everything you said. And hey, by George Schire #39640.7.1
It's a question of where to draw the line. In '57 Studebaker sold a stripped-down "Scotsman" model. by Barry Levittan #39640.8
Agree totally - but snicker when folks cant understand why we are so divided DUH (EOM) by Ron Dietrich #39640.9
Yea Ron, I agree. Having lived on the planet for 67 years, I can tell you that from my by George Schire #39640.9.1




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