700fpm is 2.1g (according to our Flight Data Analysis system) ... and that's not OK.
3,5 m/s is the speed reached after 60 cm or so freefall.
Which means that after 60 cm falling at 0g, you need 55 cm to decelerate the airframe at 2,1g to stop.
How much distance does the landing gear allow for deceleration?