Great info Biff!
I've done formation flying in light GA aircraft (Cessna 150s, 172s and Cherokees) and in L29s and L39s. I found the jets more challenging as the ones we flew took a bit to spool up and if you let the jet get ahead of you you're doing a lot of catch up, sometimes over correcting and ending up all over the place. In GA aircraft, especially those with fixed landing gear we would line up on the mains and place the nose landing gear behind the mains so you couldn't see it and then close in, all this at about 90 knots. We would have a briefing prior to the flight and plan and egress on the call "knock it off" should something get out of whack. Never had any issues or dangerous situations arise, my former roommate and I used to do two ship formation take offs in Cessna 150s, lots of fun!
FlyboyJ,
The L-29 / 39's sound A LOT like a Tweet (T-37). 1950's jet engine technology at it's finest, unhampered by progress. The astounding thing about that cast iron engine was it's ability to ingest birds with no ill effects.
In the OV-10 response was pretty good as long as you had a comparable plane to wingman (prop advantage). F-15's with F100-100 engines were pretty good, but when we got the F100-220 (FADEC equipped) it got even better.
Cheers,
Biff