| Tail Number / N-Number | N125RA |
| Manufacturer | ARMSTRONG ROBERT B |
| Model | PITTS SPECIAL S-1 |
| Year Built | 1981 |
| Manufacturer's Serial Number | RA-1 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 1 seat |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | LYCOMING |
| Engine Model | 0-290 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 140 hp (104 kW) |
| Type of Registrant | Individual |
| Owner Name | ARMSTRONG ROBERT B |
| Street | PO BOX 239 |
| City | BISHOP |
| State | GA |
| Zip Code | 30621-0239 |
| Region | Southern |
| County | Oconee County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1981-04-22 |
| Certificate Issue Date | 1981-07-07 |
| Last Action Date | 2020-06-12 |
| Expiration Date | 2027-11-30 |
| Status | Valid Registration |
| Mode S Code | 50063675 |
| Mode S Code Hex | A067BD |