| Maker | Wright GR2600- A2B | Wright GR2600- A5B | Wright GR1820- G202A | Wright GR1820- G203A | Wright GR1820- G205A | Wright GR1820- G102A | Wright GR1820- G103A |
| Arrangement | Radial | Radial | Radial | Radial | Radial | Radial | Radial |
| Cooling | Air | Air | >Air | Air | Air | Air | Air |
| No of Cyls | 14 | 14 | 9 | 9 | 9 | 9 | 9 |
| Bore/Stroke | 6.125" x 6.312" | 6.125" x 6.312" | 6.125" x 6.875" | 6.125" x 6.875" | 6.125" x 6.875" | 6.125" x 6.875" | 6.125" x 6.875" |
| Displacement | 2603 cu ins | 2603 cu ins | 1823 cu ins | 1823 cu ins | 1823 cu ins | 1823 cu ins | 1823 cu ins |
| Comp Ratio | 6.3:1 | 6.3:1 | 6.7:1 | 6.7:1 | 6.7:1 | 6.3:1 | 6.3:1 |
| bmep Cruise | 144 | 144 | 141 | 141 | 141 | 143 | 143 |
| Blower ratio | 7:1 | 7.14:1 | 7:1 | 8.3:1 | 7.14:1 | 7:1 | 8.31:1 |
| Cyl Material | Steel | Steel | Steel | Steel | Steel | Steel | Steel |
| Valves per cyl | 1 Inl 1 Exh | 1 Inl 1 Exh | 1 Inl 1 Exh | 1 Inl 1 Exh | 1 Inl 1 Exh | 1 Inl 1 Exh | 1 Inl 1 Exh |
| Valve Arr. | OHV | OHV | OHV | OHV | OHV | OHV | OHV |
| HP max - not Take-Off | 1350 | 1350 | 1275 | 1000 | 950 | 1000 | 900 |
| @ RPM | 2300 | 2300 | 2300 | 2300 | 2300 | 2300 | 2300 |
| @ Altitude | 5800ft | 5000ft | 4500ft | 9100ft | 4500ft | 6700ft | 11100ft |
| HP Take-Off | 1600 | 1600 | 1200 | 1100 | 1200 | 1100 | 1000 |
| @ RPM | 2400 | 2400 | 2500 | 2500 | 2500 | 2350 | 2350 |
| HP Cruise | 900 | 900 | 650 | 650 | 650 | 625 | 625 |
| @ RPM | 1900 | 1900 | 2000 | 2000 | 2000 | 1900 | 1900 |
| Fuel Octane | 90 | 90 | 90 | 90 | 90 | 90 | 90 |
| Prop Drive | Geared | Geared | Geared | Geared | Geared | Geared | Geared |
| Dry Weight | 1935 lbs | 1950 lbs | 2000 lbs | 2000 lbs | 2000 lbs | 1900 lbs | 1900 lbs |
| lb/Cruise HP | 2.15 | 2.17 | 1.98 | 2.01 | 2.00 | 2.02 | 2.02 |
| Carb(s) | 1x Stromberg or Chandler-Evans | 1x Stromberg or C-E | 1x Stromberg or C-E | 1x Stromberg or C-E | 1x Stromberg or C-E | 1x Stromberg or C-E | 1x Stromberg or C-E |
| Ignition | Scintilla Mag(2) | Scintilla Mag(2) | Scintilla Mag(2) | Scintilla Mag(2) | Scintilla Mag(2) | Scintilla Mag(2) | Scintilla Mag(2) |
| Electric Starter | Optional | Optional | Optional | Optional | Optional | Optional | Optional |
| Length | 62.062" | 62.062" | 50.046" | 50.046" | 50.046" | 48.125" | 48.125" |
| Height/O.D. | 55" | 55" | 55.109" | 55.109" | 55.109" | 55.109" | 55.109" |
| Width | NA | NA | NA | NA | NA | NA | NA |
| Ht above bed | NA | NA | NA | NA | NA | NA | NA |
| Mount Dia | 25" | 25" | 23.375" | 23.375" | 23.375" | 23.375" | 23.375" |