| Tail Number / N-Number | N18406 |
| Manufacturer | STINSON |
| Model | SR-9C |
| Year Built | 1937 |
| Manufacturer's Serial Number | 5312 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 5 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | LYCOMING |
| Engine Model | R680E SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 300 hp (224 kW) |
| Average Cruising Speed | 123 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | PORT TOWNSEND AERO MUSEUM |
| Street | 105 AIRPORT RD |
| City | PORT TOWNSEND |
| State | WA |
| Zip Code | 98368-9716 |
| Region | Northwest Mountain |
| County | Jefferson County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Certificate Issue Date | 2018-10-16 |
| Last Action Date | 2021-05-27 |
| Expiration Date | 2028-10-31 |
| Status | Valid Registration |
| Mode S Code | 50250777 |
| Mode S Code Hex | A151FF |