Luckily, there is a biome system in the game. With this system, the game could influence what the speed must be when the parachutes are deployed. For example: Above water: max speed to succesfully recover item == 10 m/s Above land: max speed to succesfully recover item == 8 m/s Above Hills: max speed to succesfully recover item == 4 m/s Above mountains: max speed to succesfully recover item == 2 m/s (Also, these numbers could be influenced by the crashtolerance) This will force the player to carefully pick the spots where the player feels like landing the object. The safe-parachute-landing-forumula may look like this: (Total Weight)/(Parachutecarry1 + Parachutecarry2)*(crashtolerance of the part directly on the bottom). If it is bigger than a certain value, it will be recoverable. If it is smaller... Though luck.