| Tail Number / N-Number | N121HS |
| Manufacturer | SWARTHOUT HAROLD L |
| Model | VELOCITY XLRG |
| Manufacturer's Serial Number | 121 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 4 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | LYCOMING |
| Engine Model | IO-540 SER |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 300 hp (224 kW) |
| Kit Manufacturer | VELOCITY INC |
| Kit Model | VELOCITY XL RG |
| Type of Registrant | Individual |
| Owner Name | CHARLES DAN H |
| Street | 132 MITCHELL LN |
| City | DES ALLEMANDS |
| State | LA |
| Zip Code | 70030-4151 |
| Region | Southwestern |
| County | St. Charles Parish |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2004-07-13 |
| Certificate Issue Date | 2022-11-15 |
| Last Action Date | 2022-11-15 |
| Expiration Date | 2029-11-30 |
| Status | Valid Registration |
| Mode S Code | 50054051 |
| Mode S Code Hex | A05829 |