 | CH-200 Pacemaker: 220 hp Wright J-5
(1928) |
| CH-300 Pacemaker: 330 hp Wright J-6
(1929) |
| 300-W Pacemaker: 300 hp P&W Wasp
(1930) |
| CH-400 Skyrocket: 420 hp P&W Wasp C
(1930) |
| Model D Skyrocket: 450 hp P&W Wasp
(1932) |
| Model E Pacemaker: 420 hp Wright J-6
(1932) |
| Model F Skyrocket: 550 hp P&W Wasp
(1934) |
| 31-40 Pacemaker Senior: 400 hp Wright
R-975 Whirlwind (1935) |
| 31-42 Pacemaker Senior: 13-40 with more
powerful engine (1935) |
| 31-50 Skyrocket Senior: 550 hp P&W
Wasp Hornet (1935) |
| JE: U.S. Navy utility version of the
Pacemaker |
| RE: U.S. Navy transport version of the
Skyrocket |
