Bob, look over AC23-27 closely! While not very clear, the lead section indicates it is approved data. There is a later section that says you can use...
I remember when Teterboro FSDO required a Field Approval for every avionics installation, didn't matter if it was a nav/com, or an intercom! Believe...
I towed gliders and banners with a 450 Cat. While I liked flying it, I think an L-19 was better suited to the task. 600hp would be good, but a lot of...