| Tail Number / N-Number | N44ES |
| Manufacturer | SIEVERS |
| Model | SMITH MINIPLANE |
| Manufacturer's Serial Number | ES-1 |
| 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 | AMA/EXPR |
| Engine Model | UNKNOWN ENG |
| Number of Engines | 1 engine |
| Average Cruising Speed | 86 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | AIRPOWER MUSEUM INC |
| Street | 22001 BLUEGRASS RD |
| City | OTTUMWA |
| State | IA |
| Zip Code | 52501-8569 |
| Region | Central |
| County | Wapello County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1975-08-27 |
| Certificate Issue Date | 2014-03-11 |
| Last Action Date | 2022-10-17 |
| Expiration Date | 2030-03-31 |
| Status | Valid Registration |
| Mode S Code | 51244271 |
| Mode S Code Hex | A548B9 |