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Aruba_Maverick

10-20-2002 12:24 PM

Tail_slide?

Good Day!!

I am starting to feel comfortable with my avonds F15 (after more than a year flying :stupid: ) I fly pattern also and was wondering if a turbine engine can do stall turns or tailslides without the turbne compressor stalling / surge (well your flying back-wards?? any problem with heat entering back in the airplane )
Thanks

C Lim
Smooth landing

Jason Somes

10-20-2002 04:25 PM

Tail slide

I have done tail slides many times and seems to have no adverse affects on engine performance.
I would consult engine/airframe manufacturer to be sure.

Jason Somes

TonyF

10-20-2002 09:27 PM

Tail_slide?

With external engines tail slides and such are no problem. When I was doing them with my BobCat/RAM 500 I would add just a bit of throttle once the airplane quit going up. My thinking is it would keep a better flow going through the engine. But I remember on BVM's website or Inlet newsletter the advice to NOT do tailslides with an internal engine/tailpipe model. You can overheat the pipe in the model. But of course that may be old news with old technology. BV was referencing the RAM 750 in a Bandit.

MDEE	10-20-2002 11:18 PM

Tail_slide?

A word of caution on tailslides, I'm sure recovery is OK with an F15. But in particular Kangaroo type airframes with the engine mounted high above the aircraft have a horrible ability to enter a non recoverable inverted spin when trying to tail slide them.
Believe me it's not a nice feeling. You have no surface authority, due to lack of air flow over the control surfaces.
If you have to do it, make sure you have alot of height and are feeling lucky !!!!!!!!!!!

tahfiet

10-21-2002 06:51 AM

Tail_slide?

Wolfgang Kluehr does tailslides with the big MiG-29. It is breathtaking and perfect every time. I would try it in a save altitude :D

David

rhklenke

10-21-2002 01:31 PM

Tail_slide?

Quote:

Originally posted by MDEE
A word of caution on tailslides, I'm sure recovery is OK with an F15. But in particular Kangaroo type airframes with the engine mounted high above the aircraft have a horrible ability to enter a non recoverable inverted spin when trying to tail slide them.
Believe me it's not a nice feeling. You have no surface authority, due to lack of air flow over the control surfaces.
If you have to do it, make sure you have alot of height and are feeling lucky !!!!!!!!!!!

Man, don't I know it! My 'Roo did the "chicken flop" all the way down from 600', and luckily landed in a tree. I got off easy with $400 in damage.

I've heard that you can get a 'Roo or HotSpot to be more recoverable if you move the CG several inches farther forward, but of course that makes takeoffs harder. I think I'll just stay away from the low-speed vertical stuff with my 'Roo.

Bob

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