| Tail Number / N-Number | N90SX |
| Manufacturer | ESSEX |
| Model | EXCALIBUR |
| Year Built | 2003 |
| Manufacturer's Serial Number | 090 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Light Sport |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | ROTAX |
| Engine Model | 503 DCDI |
| Engine Type | 2 Cycle |
| Number of Engines | 1 engine |
| Horsepower | 52 hp (39 kW) |
| Type of Registrant | Individual |
| Owner Name | KELLER ROBERT W |
| Street | 122 PERSIMMON ST |
| City | GLASSBORO |
| State | NJ |
| Zip Code | 08028-2840 |
| Region | Eastern |
| County | Gloucester County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2007-10-12 |
| Certificate Issue Date | 2015-12-12 |
| Last Action Date | 2021-10-25 |
| Expiration Date | 2028-12-31 |
| Status | Valid Registration |
| Mode S Code | 53067171 |
| Mode S Code Hex | AC6E79 |