Distinguishing Features
- No window behind rear seats
- Small-chord stabilators
- Fabric-covered flaps and ruddervators (D-1 thru D-40)
- Rear bench seats
- Single, throw-over control yoke
- Push-pull engine controls
- Electric propelller pitch change mechanism
- Gear handle on right, flap on left
- Free-castoring, non-streerable nose wheel
Common options and modifications
- E-225 engine (225 hp)
- Aft cabin fuel tank
- Tip tanks
- Third window
- Improved cabin ventilation system
- Instrument panel upgrade
- Dual control yoke
- Jouran/Flannagan carry-thru spar
- Avionics upgrades