Is the TriPacer still available?
Back in the late 1970's, I owned a 1957 PA22-150, a 1957 model. It had the 150 hp engine, and I loved it. It was cheap to own and fly, looked good in an old fashioned sort of way, and the climb, cruise speed and fuel consumption was roughtly comparable to a C-172. The thing glided like a flat rock, however. Also, the Tripacer had an aileron/rudder control inerlock that claimed to provide "coordinated flight" using only the control yoke with no rudder input required. The mechanism was spring loaded so you could override it to do slips, etc. In my opinion this was not a good system, and the airplane would have been better without it. I never did research the legality and desirability of disconnecting the flight control interlock system.
The Tripacer was a great little airplane, and I wish I still owned my old one.
