The SX300 is a two place, all metal, single engine low wing monoplane with fully enclosed retractable landing gear.
| Overall Length | 21 ft. 1.5 in. | |
| Overall Height | 7 ft. 6.5 in. | |
| Wing Span | 24 ft. 4.5 in. | |
| Wing Area | 70.73 sq. ft. | |
| Aspect Ratio | 8.4 | |
| Structural Cabin Width Inside | 41 in. | |
| Load Factor | 6G + 3G - | |
| Cruise Speed @ 75% Power, 8000 ft | 240 Kts. | |
| Stall Speed @ Gross Wt. (2400lbs.) flaps down | 75 Kts. | |
| Rate of Climb @ Gross Wt. Sea Level | 2400 ft./min | |
| Range (66 gal) | 900 approx. | |
| Engine: Lycoming IO-540-L1C-5 | 300 HP | |
| Propeller: Hartzell Constant Speed 3-blade | 74 in. diameter | |
| Empty Weight, approx. | 1600 lbs. | |
| Baggage Capacity | 70 lbs. | |
| Power Loading | 8 lbs./hp | |
| Vne | 280 KIAS |