Aces High Bulletin Board

General Forums => Aircraft and Vehicles => Topic started by: Scherf on June 17, 2014, 06:56:24 AM

Title: Night-time bomber engine runs, Canadian Warplane Heritage Museum
Post by: Scherf on June 17, 2014, 06:56:24 AM

Seen posted on another board, pretty cool.

http://vimeo.com/98305083

"Ya could get a blue flame *that* long," he assured us. He was later sentenced to prison. (Don't ask...)

Title: Re: Night-time bomber engine runs, Canadian Warplane Heritage Museum
Post by: Windycty on June 23, 2014, 10:30:29 PM

 :rock Pretty freakin' cool 

Title: Re: Night-time bomber engine runs, Canadian Warplane Heritage Museum
Post by: Rich46yo on June 25, 2014, 08:13:44 AM

Worth a sit thru thats for sure. :salute

Title: Re: Night-time bomber engine runs, Canadian Warplane Heritage Museum
Post by: GScholz on June 25, 2014, 10:48:31 AM

Awesome!  :aok

Title: Re: Night-time bomber engine runs, Canadian Warplane Heritage Museum
Post by: BuckShot on June 26, 2014, 09:38:01 PM

Do they run them rich to get those flames?

Thanks for posting.

Title: Re: Night-time bomber engine runs, Canadian Warplane Heritage Museum
Post by: GScholz on June 27, 2014, 01:15:30 PM

All piston engines produce flames like that if the exhaust pipes are short enough.

https://www.youtube.com/watch?v=g8qgrO09ocg&feature=player_detailpage#t=50


That's why night bombers and fighters had flame dampeners/hiders on the exhausts...


(http://www.radartutorial.eu/19.kartei/pic/img8552.jpg)

Title: Re: Night-time bomber engine runs, Canadian Warplane Heritage Museum
Post by: Scherf on June 27, 2014, 10:28:10 PM

As it happens, most of the Mosquito night bombers didn't. You see flame gear on the very early Oboe markers, but by late 43 all the night Mossie bombers seem to have stub exhausts, including the low-level markers of 627 Sqn. The night fighters retained the dampeners, apparently the extra light interfered with aiming, and the intruder craft didn't want the ack gunners to have a clear target while they stooged around LW fields.

Title: Re: Night-time bomber engine runs, Canadian Warplane Heritage Museum
Post by: Karnak on June 27, 2014, 10:49:55 PM

Nice video. I am a bit worried about the fate of the Mossie.

Quote from: Scherf on June 27, 2014, 10:28:10 PM

As it happens, most of the Mosquito night bombers didn't. You see flame gear on the very early Oboe markers, but by late 43 all the night Mossie bombers seem to have stub exhausts, including the low-level markers of 627 Sqn. The night fighters retained the dampeners, apparently the extra light interfered with aiming, and the intruder craft didn't want the ack gunners to have a clear target while they stooged around LW fields.

My understanding is that for the bomber Mossies the performance hit was judged not worth hiding the flames. 

Title: Re: Night-time bomber engine runs, Canadian Warplane Heritage Museum
Post by: GScholz on June 28, 2014, 11:07:33 AM

For most of the war they were fast enough to make it a mute point. For the NFs it was much more important to hide your presence from enemy eyes and guns. Also on slower bombers like the Lanc flame dampeners were essential for survival.

Title: Re: Night-time bomber engine runs, Canadian Warplane Heritage Museum
Post by: Groth on June 28, 2014, 11:17:06 AM

 Good post.
         JGroth