| Tail Number / N-Number | N4938 |
| Manufacturer | BENSEN |
| Model | B-8M |
| Year Built | 1971 |
| Manufacturer's Serial Number | 1 |
| Aircraft Type | Gyroplane |
| 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 | JOHNSTON STEPHEN P |
| Street | 27107 12TH AVE S |
| City | HAWLEY |
| State | MN |
| Zip Code | 56549-9139 |
| Region | Great Lakes |
| County | Clay County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Certificate Issue Date | 1973-07-26 |
| Last Action Date | 2020-06-07 |
| Expiration Date | 2027-10-31 |
| Status | Valid Registration |
| Mode S Code | 51417255 |
| Mode S Code Hex | A61EAD |