The U.S. aircraft register, updated daily
Engines · piston (reciprocating) · data as of October 8, 2026

Menasco PIRATE C4S

10 aircraft on the U.S. register carry a Menasco PIRATE C4S engine, rated at about 150 horsepower. The Ryan Aeronautical ST-A SPECIAL is the model most often fitted with it (6 aircraft). The aircraft carrying it were built between 1933 and 1940.

The FAA records engines by code, usually at the level of a series ("O-320 series") rather than the exact variant; this page gathers every FAA code that reads as Menasco PIRATE C4S. FAA spelling: PIRATE C4S.

Fitted to model families

Model families, as a table
aircraft
Ryan Aeronautical ST-A SPECIAL6
Ryan Aeronautical ST-A2
Brown RACER1
Ryan Aeronautical STM1

Ryan Aeronautical ST-A SPECIAL · Ryan Aeronautical ST-A · Brown RACER · Ryan Aeronautical STM

Kind of aircraft

By kind, as a table
aircraftshare
Piston singles10100%

When the aircraft were built by decade

By decade built, as a table
aircraft
19306
19403

What the FAA has certified, ordered and been told about the Menasco PIRATE C4S the component layer

The design is held under 1 type certificate (TC 134, held by Menasco Manufacturing CO.). No FAA order in the current files names this engine series.

Certificates and bulletins

TC 134Type certificate held by Menasco Manufacturing CO. · 2 models listed

Sources: the FAA's type certificate data sheets, airworthiness directives, supplemental type certificates, special conditions and special airworthiness information bulletins (Dynamic Regulatory System), and the FAA's service difficulty reports. A failure report is what an operator or repair station chose to file; the counts show reporting as much as reliability, and larger and commercial fleets report more. How the systems are grouped.

Connections how this engine series links to the rest of the register

Fitted to
Where they are
Biggest operators

The whole map of how records connect · these connections as data: /graph/engine/menasco-pirate-c4s.json.

Aircraft newest certificates first · 10

Tail no.Maker and modelGroupOwner and baseCertificateRegisteredStatus
N17343 Ryan Aeronautical
ST-A SPECIAL
Fixed-wing, single engine International Air Services INC Trustee
Carson City, Nevada
Standard 2026-01-27 ValidFAA registration status code V: Valid registration. All codes
N17348 Ryan Aeronautical
ST-A SPECIAL
Fixed-wing, single engine Individual owner
Montana
Standard 2023-08-09 ValidFAA registration status code V: Valid registration. All codes
N466WA Ryan Aeronautical
STM
Fixed-wing, single engine Individual owner
Washington
Experimental 2021-10-22 ValidFAA registration status code V: Valid registration. All codes
N7779 Ryan Aeronautical
ST-A
Fixed-wing, single engine Individual owner
Nevada
Standard 2019-04-01 ValidFAA registration status code V: Valid registration. All codes
N17368 Ryan Aeronautical
ST-A SPECIAL
Fixed-wing, single engine Western Antique Aeroplane & Automobile Museum
Hood River, Oregon
Standard 2018-05-18 ValidFAA registration status code V: Valid registration. All codes
N17360 Ryan Aeronautical
ST-A SPECIAL
Fixed-wing, single engine Simply Living LLC
Fort Myers, Florida
Standard 2017-04-18 ValidFAA registration status code V: Valid registration. All codes
N83Y Brown
RACER
Fixed-wing, single engine Individual owner
Florida
Experimental 2012-07-17 ValidFAA registration status code V: Valid registration. All codes
N17350 Ryan Aeronautical
ST-A SPECIAL
Fixed-wing, single engine Individual owner
Pennsylvania
Standard 2012-07-03 ValidFAA registration status code V: Valid registration. All codes
N8146 Ryan Aeronautical
ST-A SPECIAL
Fixed-wing, single engine Individual owner
Illinois
Standard 1999-06-11 ValidFAA registration status code V: Valid registration. All codes
N17353 Ryan Aeronautical
ST-A
Fixed-wing, single engine Creative Interiors INC
Wichita, Kansas
Standard 1991-04-24 ValidFAA registration status code V: Valid registration. All codes

Source: FAA Civil Aviation Registry, Releasable Aircraft Database (the engine reference table and each aircraft's engine code), October 8, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.