| Tail Number / N-Number | N921DH |
| Manufacturer | HARTZLER RICHARD B |
| Model | NIEUPORT II |
| Year Built | 1996 |
| Manufacturer's Serial Number | 00736 |
| 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 | VOLKSWAGEN |
| Engine Model | CONVERSION |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 36 hp (27 kW) |
| Type of Registrant | Individual |
| Owner Name | HARTZLER RICHARD B |
| Street | 14203 S HAVEN RD |
| City | GRANDVIEW |
| State | MO |
| Zip Code | 64030-4058 |
| Region | Central |
| County | Jackson County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1997-09-17 |
| Certificate Issue Date | 1996-11-06 |
| Last Action Date | 2021-11-01 |
| Expiration Date | 2028-11-30 |
| Status | Valid Registration |
| Mode S Code | 53141064 |
| Mode S Code Hex | ACC234 |