| Tail Number / N-Number | N21TS |
| Manufacturer | STIRLING FRED |
| Model | KITFOX |
| Manufacturer's Serial Number | 178 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | BOMBARDIER |
| Engine Model | ROTAX (ALL) |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Type of Registrant | Individual |
| Owner Name | STUBBLEFIELD MATTHEW K |
| Street | PO BOX 2136 |
| City | WEST YELLOWSTONE |
| State | MT |
| Zip Code | 59758-2136 |
| Region | Northwest Mountain |
| County | Gallatin County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1988-07-22 |
| Certificate Issue Date | 2020-07-09 |
| Last Action Date | 2020-07-09 |
| Expiration Date | 2027-07-31 |
| Status | Valid Registration |
| Mode S Code | 50334343 |
| Mode S Code Hex | A1B8E3 |