| Tail Number / N-Number | N83HF |
| Manufacturer | RUSSELL HEPPNER/BONNIE HEPPNER |
| Model | S-21 |
| Year Built | 2022 |
| Manufacturer's Serial Number | 03200092 |
| 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 | CONT MOTOR |
| Engine Model | IOX340 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 180 hp (134 kW) |
| Kit Manufacturer | RANS DESIGNS INC |
| Kit Model | S-21 OUTBOUND |
| Type of Registrant | Co-Ownership |
| Owner Name | HEPPNER RUSSELL E |
| Other Names |
|
| Street | 37808 COUNTY ROAD 53 |
| City | EATON |
| State | CO |
| Zip Code | 80615-9617 |
| Region | Northwest Mountain |
| County | Weld County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2022-11-25 |
| Certificate Issue Date | 2022-05-05 |
| Last Action Date | 2022-05-05 |
| Expiration Date | 2029-05-31 |
| Status | Valid Registration |
| Mode S Code | 52653266 |
| Mode S Code Hex | AB56B6 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N83HF.
| Tail Number / N-Number | N83HF |
| Manufacturer | BRITISH AEROSPACE |
| Model | HS 125-700A |
| Year Built | 1981 |
| Manufacturer's Serial Number | NA0339 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 15 seats |
| Weight Class | CLASS 3 (20,000+ pounds gross take off weight) |
| Engine Manufacturer | ALLIEDSIGN |
| Engine Model | TFE731-3R |
| Engine Type | Turbo-fan |
| Number of Engines | 2 engines |
| Thrust per Engine | 3,880 pounds-force (17.3 kN) |
| Total Thrust | 7,760 pounds-force (34.5 kN) |
| Type of Registrant | Corporation |
| Owner Name | MOUNTAIN AVIATION LLC |
| Street | 204 E 22ND ST |
| City | CHEYENNE |
| State | WY |
| Zip Code | 82001-3729 |
| County | Weld County |
| Country | US |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1998-01-28 |
| Certificate Issue Date | 2009-03-05 |
| Last Action Date | 2011-01-31 |
| Last Status | Third Notice for Registration Renewal |
| Cancellation Date | 2014-07-02 |