| Tail Number / N-Number | N185J |
| Manufacturer | SMITH MINIPLANE |
| Model | J-SMITH |
| Year Built | 1967 |
| Manufacturer's Serial Number | JS-101 |
| 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 | 0-290 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 140 hp (104 kW) |
| Average Cruising Speed | 86 miles per hour |
| Type of Registrant | LLC |
| Owner Name | MIDFIELD AVIATION LLC |
| Street | 604 TAILDRAGGER PL |
| City | CALDWELL |
| State | ID |
| Zip Code | 83605-6967 |
| Region | Northwest Mountain |
| County | Canyon County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1976-10-12 |
| Certificate Issue Date | 2020-10-21 |
| Last Action Date | 2020-10-21 |
| Expiration Date | 2027-10-31 |
| Status | Valid Registration |
| Mode S Code | 50252007 |
| Mode S Code Hex | A15407 |