| Tail Number / N-Number | N88UM |
| Manufacturer | AEROTEK |
| Model | PITTS SPECIAL S-1S |
| Year Built | 1975 |
| Manufacturer's Serial Number | 1-0035 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | 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 | AEIO-360-B4A |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 180 hp (134 kW) |
| Average Cruising Speed | 115 miles per hour |
| Type of Registrant | Individual |
| Owner Name | SCHEFER CHARLES W L |
| Street | 7106 CAVALRY DR |
| City | WARRENTON |
| State | VA |
| Zip Code | 20187-9187 |
| Region | Eastern |
| County | Fauquier County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2017-09-01 |
| Certificate Issue Date | 2022-09-13 |
| Last Action Date | 2022-10-24 |
| Expiration Date | 2029-09-30 |
| Status | Valid Registration |
| Mode S Code | 53016512 |
| Mode S Code Hex | AC1D4A |