has anyone built a thrust reverser yet ?
 

Has anyone done a Thrust Reverser on a model size gas turbine?

Thanks
Jackjet

RE: has anyone built a thrust reverser yet ?
 

I think I remember seeing someone that did a thrust reversing mechanism on either a LearJet model or airliner. It was the clam-shell type that deployed from the nacelle and came together at the rear and deflected the exhaust up and down and slightly forward. Not sure if he ever got it finished.

RE: has anyone built a thrust reverser yet ?
 

Thrust reversers are somewhat discouraged by the AMA. Here's a quote from the AMA turbine safety regs:

Other special controls such as water injection, thrust reversers, variable nozzles, etc. are acceptable only if engine manufacturer provided and supported by development testing and user training.

They're not forbidden, just not quite approved, either.

RE: has anyone built a thrust reverser yet ?
 

Well.. techincally thrust vectoring and thrust reversers (clam shells) are basically the same.

RE: has anyone built a thrust reverser yet ?
 

Not quite...thrust reversers can cause the hot efflux to hit the airframe, which in the case of our models can either melt or burn. There is also a possibility of blowback into the fuselage which would be a very, very bad thing.

Now having said that....there is a video out there of a fellow in Germany who built one on a twin boom aircraft and seems to have it working just fine...

RE: has anyone built a thrust reverser yet ?
 

No, they are not.

Thrust vectoring changes the path of the thrust maybe 10 degrees but it still exhausts to the rear, aiding in forward flight (discount the Harrier please). A clam shell thrust reverser blocks the rearward exhaust flow, redirects it forward and assists in stopping the jet after landing. Deploy a TR in flight and you will crash unless the reverser tears off or you get it restowd. Thrust vectoring in flight is used all of the time, but does not assist in stopping after landing (discount the Harrier again please).

Beave

RE: has anyone built a thrust reverser yet ?
 

Here is a pretty neat vid of a guy who made operating TRs on a foam MD-80. He is the brother of a guy I work with.

Beave

http://www.youtube.com/watch?v=Tpw52...eature=channel