At a rather action-packed Abingdon airshow on Sunday, the visiting french Yak caused another ripple of concern with its fiery landing roll.
Maybe just excess unburnt fuel from a windmilling prop, or something else? Rather a dramatic end to the display.
By: Graham Boak - 17th May 2017 at 21:05
The normal pattern on such an installation is to have some of the exhausts grouped to exhaust at the sides, and others underneath.
I don’t see why being at sea-level has any connection with running rich, nor why this should happen with any properly-handled engine. Obviously it does at times, for various reasons, but I don’t see this as being in any way normal. After all, Yak 11s have been around for a longtime, even in the West, without this being commented on. Do you ever see this on Sea Furies? Fw.190s? (OK, not so much evidence for those ones nowadays…)
By: Kenneth - 17th May 2017 at 20:51
I thought the exhaust ports were on each side of the engine, not below the engine…
By: Archer - 17th May 2017 at 13:21
A lot of aircraft engine types run rich at sea level, and on larger engines this is not uncommon as far as I know.
By: Avro Avian - 17th May 2017 at 12:29
Running too rich and ‘afterburning’ when the power is pulled back to idle. I saw a C47 do this years ago and it was also a LAME exam question. 🙂
By: Trolly Aux - 17th May 2017 at 11:08
Running a bit rich? unburnt fuel? must admit never seen this on landing before
By: Matt Gunsch - 17th May 2017 at 07:18
might be unburned smoke oil that collected in the exhaust
By: Matt Gunsch - 17th May 2017 at 07:17
unburned smoke oil that collected in the exhaust
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May 16, 2017 at 10:20 pm