Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N4978.
| Tail Number / N-Number | N4978 |
| Manufacturer | MARTIN |
| Model | AUTOGYRO BENSEN B-8 |
| Year Built | 1972 |
| Manufacturer's Serial Number | BM-1 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 1 seat |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | MCCULLOCH |
| Engine Model | 4318A&E/0-100 |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 72 hp (54 kW) |
| Average Cruising Speed | 45 miles per hour |
| Type of Registrant | Individual |
| Owner Name | MARTIN ROBERT L JR |
| Street | 10711 LIBERTY RD |
| City | RANDALLSTOWN |
| State | MD |
| Zip Code | 21133 |
| Country | US |
| Airworthiness Classification | Experimental |
| Certificate Issue Date | 1972-11-15 |
| Last Action Date | 1977-04-09 |
| Last Status | Revoked – Canceled |
| Cancellation Date | 2012-08-09 |
| Mode S Code | 51426611 |
| Mode S Code Hex | A62D89 |