Detonation, etc.
Thread Starter
Joined: May 2004
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From: Neither Here Nor There
Detonation, etc.
Hi guys,
Just finishing the ATPLs and it's occurred to me that I've never experienced or come across Detonation or Pre-Ignition.
Do any of you learned folks know of any web-site or DVD / Video that demonstrates this? Obviously, it's not something you would want to do purposely so I wondered if anyone knows of a source of info.
The nearest I've come is inadvertently switching the Mags to 'Off' during power checks then back on quickly which resulted in a great big 'bang!' and cloud of smoke, along with a group of onlookers diving for cover. As a matter of interest, what was that?
Cheers,
2close
Just finishing the ATPLs and it's occurred to me that I've never experienced or come across Detonation or Pre-Ignition.
Do any of you learned folks know of any web-site or DVD / Video that demonstrates this? Obviously, it's not something you would want to do purposely so I wondered if anyone knows of a source of info.
The nearest I've come is inadvertently switching the Mags to 'Off' during power checks then back on quickly which resulted in a great big 'bang!' and cloud of smoke, along with a group of onlookers diving for cover. As a matter of interest, what was that?
Cheers,
2close
Joined: Feb 2006
Aviation Qualifications: LAME
Posts: 1,129
Likes: 168
From: Station 42
The 'great big bang' was the unburnt fuel in the exhaust suddenly igniting after the mags were turned back on (very hot gases through the exhaust valve). Very spectacular, I agree, especially on a large radial engine!
Anyone interested in detonation and pre-ignition will find this article useful:
http://www.douglasdc3.com/sohn/7.htm
Anyone interested in detonation and pre-ignition will find this article useful:
http://www.douglasdc3.com/sohn/7.htm
