| Tail Number / N-Number | N81RB |
| Manufacturer | BENTLEY RICHARD L |
| Model | RV-4 |
| Year Built | 1988 |
| Manufacturer's Serial Number | 1212 |
| 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 | 0-320 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 180 hp (134 kW) |
| Type of Registrant | Individual |
| Owner Name | JOHNS WILLIAM D |
| Street | 4931 CORA POST RD |
| City | LODI |
| State | CA |
| Zip Code | 95240-7356 |
| Region | Western-Pacific |
| County | San Joaquin County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1988-06-10 |
| Certificate Issue Date | 2014-09-23 |
| Last Action Date | 2020-09-08 |
| Expiration Date | 2027-09-30 |
| Status | Valid Registration |
| Mode S Code | 52604174 |
| Mode S Code Hex | AB087C |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N81RB.
| Tail Number / N-Number | N81RB |
| Manufacturer | BLAKESLEE RICHARD A |
| Model | SIDEWINDER |
| Manufacturer's Serial Number | 212599 |
| 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) |
| Number of Engines | 1 engine |
| County | San Joaquin County |
| Last Status | The Triennial Aircraft Registration form was mailed and has not been returned by the Post Office |