Originally Posted by camillodinucci
It turns out that I am very tall 2.00 meters height and weight 100 kg (220 lbs), being tall limits the possibility of using a parachute on the back or even a seat because when gaining height in the seat my knees hit the instrument panel when commanding the rudder pedals.
I'm only a little bit shorter than that (1.95m) and weigh around 100kg. I use a Butler seat pack and take out both the seat and back cushions when flying with the chute. This is with the "tall pilot option" more reclined seat back. I have about 5cm between the top of my headset and the canopy. When strapped in get no canopy contact even at -3g.
My knees do just barely hit the bottom of the panel when using the cushion instead of the chute, but it doesn't seem to be a problem in flight.
A ballistic chute would be a very big project, especially connecting the chute to the airframe strong enough to take the loads, would be worth borrowing a seat chute from someone and seeing if you can't make it work.