TM 10-1670-287-23&P 0065 00 GROUP 00 MC-4 RAM AIR FREE-FALL PERSONNEL PARACHUTE SYSTEM  Figure 1. MC-4 Ram Air Free-Fall Personnel Parachute System (Sheet 3 of 3)  0065 00-4  22 ½-IN.  to 23 ½-IN.  18 13 1-IN. 12-IN. ± ½-IN. 16 15 14 17