| Tail Number / N-Number | N840 |
| Manufacturer | NORTH AMERICAN |
| Model | P-64 |
| Year Built | 1940 |
| Manufacturer's Serial Number | 68-3061 |
| 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 | WRIGHT |
| Engine Model | R-1820 SER |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 1,475 hp (1,100 kW) |
| Average Cruising Speed | 285 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | EXPERIMENTAL AIRCRAFT ASSOCIATION INC |
| Street | PO BOX 3086 |
| City | OSHKOSH |
| State | WI |
| Zip Code | 54903-3086 |
| Region | Great Lakes |
| County | Winnebago County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1983-03-03 |
| Certificate Issue Date | 2016-07-12 |
| Last Action Date | 2022-02-16 |
| Expiration Date | 2029-07-31 |
| Status | Valid Registration |
| Mode S Code | 52677730 |
| Mode S Code Hex | AB7FD8 |
Deregistered Aircraft 1 of 3. This aircraft was previously assigned the N-number N840.
| Tail Number / N-Number | N840 |
| Manufacturer | DONALD R VOLAND |
| Model | V-1 |
| Manufacturer's Serial Number | 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) |
| Number of Engines | 1 engine |
| Type of Registrant | Corporation |
| Owner Name | EXPERIMENTAL AIRCRAFT ASSN |
| Street | AIR MUSEUM FOUNDATION 11311 W FOREST AVE |
| City | FRANKLIN |
| State | WI |
| Zip Code | 53132 |
| Region | Great Lakes |
| County | Winnebago County |
| Certificate Issue Date | 1965-05-08 |
| Last Status | Valid Registration |
| Cancellation Date | 1965-06-03 |
Deregistered Aircraft 2 of 3. This aircraft was previously assigned the N-number N840.
| Tail Number / N-Number | N840 |
| Manufacturer | DELACKNER HELICOPTERS |
| Model | DH4 |
| Manufacturer's Serial Number | 2 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 1 seat |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 27 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | DE LACKNER HELICOPTER INC |
| Street | 14 N BLEEKER ST |
| City | MOUNT VERNON |
| State | NY |
| Zip Code | 10550 |
| Region | Eastern |
| County | Winnebago County |
| Certificate Issue Date | 1956-06-21 |
| Last Status | Valid Registration |
| Cancellation Date | 1957-05-06 |
Deregistered Aircraft 3 of 3. This aircraft was previously assigned the N-number N840.
| Tail Number / N-Number | N840 |
| Manufacturer | CESSNA |
| Model | T-50 |
| Manufacturer's Serial Number | 44145 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 5 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 2 engines |
| Average Cruising Speed | 131 miles per hour |
| Type of Registrant | Individual |
| Owner Name | HEMMERDINGER M E |
| Street | 407 GEORGE MASON DR |
| City | ARLINGTON |
| State | VA |
| Zip Code | 22201 |
| Region | Eastern |
| County | Winnebago County |
| Certificate Issue Date | 1945-05-25 |
| Last Status | Valid Registration |
| Cancellation Date | 1950-02-27 |