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Posts: 136
Joined: Mon Jan 15, 2001 9:03 am

Purpose Of "daisy Petal"

Tue Feb 27, 2001 7:45 am

This maybe a basic question but I see on photos of very old turbojet-powered 707 and DC-8 what is called a "daisy petal" exhaust on engines.
What is the purpose of this device, because all of the turbofan-powered jetliners don't have these kind of exhaust ?
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Joined: Tue Oct 26, 1999 11:34 am

RE: Purpose Of "daisy Petal"

Tue Feb 27, 2001 8:32 am

They were a form of early noise supression to help mix the cold slower moving ambient air with the hot high speed jet exhaust.

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