| Tail Number / N-Number | N521NU |
| Manufacturer | NASA LANGLEY RESEARCH CENTER |
| Model | PHANTOM 2 #1 |
| Manufacturer's Serial Number | NASAP201 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 0 seats |
| Weight Class | CLASS 4 (UAV up to 55 pounds gross take off weight) |
| Number of Engines | 4 engines |
| Type of Registrant | Government |
| Owner Name | NASA LANGLEY RESEARCH CENTER |
| Street | 6 E TAYLOR ST |
| City | HAMPTON |
| State | VA |
| Zip Code | 23681-2130 |
| Region | Eastern |
| County | Hampton city |
| Country | US |
| Fractional Ownership | No |
| Certificate Issue Date | 2015-03-23 |
| Last Action Date | 2020-11-09 |
| Expiration Date | 2028-03-31 |
| Status | Valid Registration |
| Mode S Code | 51506744 |
| Mode S Code Hex | A68DE4 |