RE: emergency Parachute safety system
Hi, you are probably thinking along the lines of the rocket deployed parachute that they install in light full size planes. There is a lot of engineering behind it and not worth trying if you don't do the physics - you need to size the chute according to weight, speed at deployment, chute shape, amount of chords, spill hole size, type of material like sky divers do. If the chute is too small, or wrong shape it will just slow the plane down to stall speed and will fall (drop) down like a rock. If the chute is too big, it will most likely rip the anchor point out/plane apart if deployed - talk to some skydivers on this topic. You would need a pretty large chute and you may not be able to deploy it if you got radio interference.
If you have good radio gear, the plane is well build and in good trim, the batteries fully charged, is on an approved frequency with frequency control and use good fuel, you don't need a chute in the first place.