Cobra IR Suppression Update

Great shots Dave! Thanks!

There's a really good article on the new exhausts here: http://www.vtol.org/pdf/61OperationsII.pdf

Jon, thanks for finding that great article. Really explains the theory and testing behind this new system. The heat buildup on our tailbooms has always been a source of metal fatigue in the structure and added maintenance -- i.e. replacing tailbooms due to cracks, etc. If there's any doubt on just how hot the tailboom gets, I'll say this; the two aft APR-39 antennas mounted either side of the vert fin would get soft and mushy, and actually start to lose their outer plastic coatings. The article's 120 KIAS image really demonstrates how that heat just pours back there.

Andy

Jon,

Thanks for the link!  Great article!