| Tail Number / N-Number | N129MF |
| Manufacturer | FOY MARTIN |
| Model | RV-4 |
| Year Built | 1984 |
| Manufacturer's Serial Number | 129 |
| 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 | LYCOMING |
| Engine Model | IO-320 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 150 hp (112 kW) |
| Type of Registrant | Individual |
| Owner Name | FOY MARTIN J |
| Street | PO BOX 2804 |
| City | KIRKLAND |
| State | WA |
| Zip Code | 98083-2804 |
| Region | Northwest Mountain |
| County | King County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1984-07-16 |
| Certificate Issue Date | 1984-07-10 |
| Last Action Date | 2020-06-08 |
| Expiration Date | 2027-11-30 |
| Status | Valid Registration |
| Mode S Code | 50073072 |
| Mode S Code Hex | A0763A |