Thank you for the input. It would be great to share some thoughts on the technical details, without the conversation drifting off to fast in the direction of "chutes are just for bad pilots or badly constructed planes". There are good arguments pro and con. Lets just for sake of a good brainstorming suppose, for some people to have a rescue system is worth the effort.
Not what I would want firing off from inside the passenger compartment in an airplane I was flying....
I am sorry for writing down the rocket motor - steam - smoke topic so little precise. What I meant was, this not the type of black powder driven firework rocket. Sure, a BRS rocket uses a solid chemical propellant, but it is different. The chute companies homepages surely will have the information in english. (I cant describe better) Anyway, of course it is best to keep the rocket out of the cabin. It is not nice the other way, but the guy, with the rescue system inside the cabin also told me, the cabin cleared in seconds.
If the aircraft occupants will always be on the lighter side as far as human adults go, then the loss of payload weight might not be too big of an issue, but unless an installation can be designed that would mount the canister in the baggage area the C.G. shift induced by the installation would likely make the baggage area just about unusable, regardless of the weight of the bodies in the seats.
Very good point. You are absolutely right, the main weight of the system needs to be near C.G. Best place seems to be the baggage compartment, The package is not big, so there is not much wasted space, just lost payload (what is bad enough, but if you want something you have to except its downsides).
I considered a BRS, but I concluded the gas tank would be an issue due to the harness. I was concerned that any harness attached to the main spars could rupture the tank on deployment.
At this point, attaching the harnesses seems the biggest problem to me. Of course the main spar is the strongest part of the plane. But I hope other good attachment points a little forward and rearward can be found. Four such points must be found. The plane must hang with a slight nose down attitude. Can someone provide the distance of the main spar to the C.G. range?