| Tail Number / N-Number | N866WK |
| Manufacturer | EDWARD MALLEY III |
| Model | PITTS S-1 |
| Year Built | 1974 |
| Manufacturer's Serial Number | 348H |
| Aircraft Type | Fixed wing single engine |
| 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 | LYCOMING |
| Engine Model | O-360-A1A |
| Engine Type | 4 Cycle |
| Number of Engines | 1 engine |
| Horsepower | 180 hp (134 kW) |
| Type of Registrant | Individual |
| Owner Name | MEYER BENJAMIN R |
| Street | 20 LUCKYS LANDING RD |
| City | GLENBURN |
| State | ME |
| Zip Code | 04401-1433 |
| Region | New England |
| County | Penobscot County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2016-03-21 |
| Certificate Issue Date | 2018-02-08 |
| Last Action Date | 2021-03-25 |
| Expiration Date | 2028-02-29 |
| Status | Valid Registration |
| Mode S Code | 52763437 |
| Mode S Code Hex | ABE71F |