| Tail Number / N-Number | N21RK |
| Manufacturer | KING |
| Model | PITTS S-1-S |
| Year Built | 1974 |
| Manufacturer's Serial Number | 2121 |
| 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 | 0-320 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 180 hp (134 kW) |
| Average Cruising Speed | 81 miles per hour |
| Type of Registrant | Individual |
| Owner Name | DUCHARME QUIN P |
| Street | 106 KEENEY AVE |
| City | LAFAYETTE |
| State | LA |
| Zip Code | 70501-6504 |
| Region | Southwestern |
| County | Lafayette Parish |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1980-07-03 |
| Certificate Issue Date | 2014-04-08 |
| Last Action Date | 2023-01-22 |
| Expiration Date | 2027-04-30 |
| Status | Valid Registration |
| Mode S Code | 50334252 |
| Mode S Code Hex | A1B8AA |