I never heard of them before, either. Apparently they're no longer offered by Kennon. I've found past advertisements from a decade or more ago, but nothing recent.

Seems like a neat feature.


-Kirk Wennerstrom
President, Cessna 150-152 Fly-In Foundation
1976 Cessna Cardinal RG N7556V
Hangar D1, Bridgeport, CT KBDR