Engines · piston (reciprocating) · data as of October 23, 2026

Lambert R266

37 aircraft on the U.S. register carry a Lambert R266 engine, rated at about 90 horsepower. The Monocoupe 90 is the model most often fitted with it (30 aircraft). The aircraft carrying it were built between 1930 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 Lambert R266. FAA spelling: R266.

Fitted to model families

Monocoupe 9030Franklin 903Dart G2Nicholas Beazley NB-81Star CAVALIER E1

Model families, as a table

	aircraft
Monocoupe 90	30
Franklin 90	3
Dart G	2
Nicholas Beazley NB-8	1
Star CAVALIER E	1

Monocoupe 90 · Franklin 90 · Dart G · Nicholas Beazley NB-8 · Star CAVALIER E

Where they are owner's state

Louisiana5Pennsylvania4New York3North Carolina3Wisconsin2Texas2Ohio2Missouri2Florida2California2

By state, as a table

	aircraft
Louisiana	5
Pennsylvania	4
New York	3
North Carolina	3
Wisconsin	2
Texas	2
Ohio	2
Missouri	2
Florida	2
California	2

Kind of aircraft

Piston singles37 (100%)

By kind, as a table

	aircraft	share
Piston singles	37	100%

When the aircraft were built by decade

By decade built, as a table

	aircraft
1930	33
1940	1

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

Fitted to

Monocoupe 90 30 with this engine series
Franklin 90 3 with this engine series
Dart G 2 with this engine series
Nicholas Beazley NB-8 1 with this engine series

Where they are

Louisiana 5 of these aircraft
Pennsylvania 4 of these aircraft
New York 3 of these aircraft
North Carolina 3 of these aircraft
Wisconsin 2 of these aircraft

Biggest operators

Rhinebeck Aerodrome Museum 1 of these aircraft
Historic Aircraft Restoration Museum 1 of these aircraft
Golden Age Air Museum 1 of these aircraft

Analytics

The whole map of how records connect · these connections as data: /graph/engine/lambert-r266.json.

Aircraft newest certificates first · 37

Tail no.	Maker and model	Group	Owner and base	Certificate	Registered	Status
N15437	Monocoupe 90A	Fixed-wing, single engine	Individual owner Illinois	Standard	2026-02-25	Valid
N11783	Monocoupe 90A	Fixed-wing, single engine	Individual owner Louisiana	Standard	2025-03-02	Valid
N15440	Monocoupe 90A	Fixed-wing, single engine	Caldwell Collection INC Oklahoma City, Oklahoma	Standard	2025-02-10	Valid
N19438	Monocoupe 90	Fixed-wing, single engine	Individual owner North Carolina	None on file	2024-08-14	Valid
N557W	Monocoupe 90	Fixed-wing, single engine	Individual owner Florida	Standard	2024-07-27	Valid
N11776	Monocoupe 90A	Fixed-wing, single engine	Individual owner California	Standard	2022-12-17	Valid
N12361	Monocoupe 90	Fixed-wing, single engine	Individual owner Texas	Standard	2020-02-26	Valid
N18168	Monocoupe 90A	Fixed-wing, single engine	Individual owner New York	Standard	2019-12-20	Valid
N11768	Monocoupe 90A	Fixed-wing, single engine	Individual owner New York	Standard	2019-12-18	Valid
N19430	Monocoupe 90A	Fixed-wing, single engine	Individual owner Florida	Standard	2019-12-17	Valid
N11767	Monocoupe 90A	Fixed-wing, single engine	Art Ticulate Tees LLC Hazard, Kentucky	Standard	2019-10-03	Valid
N19434	Monocoupe 90A	Fixed-wing, single engine	Bill Mcgowan INC Covington, Louisiana	Standard	2019-07-10	Valid
N537W	Monocoupe 90	Fixed-wing, single engine	Command Aire LLC Sitka, Alaska	Standard	2017-05-19	Valid
N11747	Monocoupe 90A	Fixed-wing, single engine	Co-owned owner North Carolina	Standard	2016-09-01	Valid
N520W	Monocoupe 90	Fixed-wing, single engine	Individual owner California	Standard	2016-08-18	Valid
N11754	Monocoupe 90A	Fixed-wing, single engine	Individual owner Oregon	Standard	2016-05-04	Valid
N11761	Monocoupe 90A	Fixed-wing, single engine	Co-owned owner North Carolina	Standard	2016-03-04	Valid
N19423	Monocoupe 90A	Fixed-wing, single engine	Individual owner Arizona	Standard	2014-09-17	Valid
N119V	Monocoupe 90	Fixed-wing, single engine	Historic Aircraft Restoration Museum Saint Louis, Missouri	Standard	2014-04-28	Valid
N429N	Monocoupe 90	Fixed-wing, single engine	Rhinebeck Aerodrome Museum Rhinebeck, New York	Standard	2013-10-17	Valid
N20991	Dart G	Fixed-wing, single engine	Individual owner Ohio	Standard	2013-06-25	Valid
N10779	Franklin 90	Fixed-wing, single engine	Eagles Mere Air Museum Foundation Wayne, Pennsylvania	Standard	2013-03-20	Valid
N13139	Franklin 90	Fixed-wing, single engine	Alfred and Lois Kelch Aviation Museum INC Brodhead, Wisconsin	Standard	2012-05-24	Valid
N583Y	Nicholas Beazley NB-8G	Fixed-wing, single engine	Marshall Nicholas Beazley Aviation Museum INC Marshall, Missouri	Standard	2012-01-24	Valid
N11751	Monocoupe 90A	Fixed-wing, single engine	Individual owner Georgia	Standard	2008-10-06	Valid
N19424	Monocoupe 90A	Fixed-wing, single engine	Individual owner Texas	Standard	2007-11-29	Valid
N16426	Monocoupe 90A	Fixed-wing, single engine	Crestair Air LLC Dover, Delaware	Standard	2007-09-05	Valid
N11750	Monocoupe 90A	Fixed-wing, single engine	Golden Age Air Museum Bethel, Pennsylvania	Standard	2003-07-22	Valid
N19433	Monocoupe 90A	Fixed-wing, single engine	Schell Samuel e JR Littlestown, Pennsylvania	Standard	2002-03-07	Valid
N350V	Star CAVALIER E	Fixed-wing, single engine	Individual owner Pennsylvania	None on file	1996-02-28	Valid
N20996	Dart G	Fixed-wing, single engine	Individual owner Ohio	Standard	1994-11-23	Valid
N11735	Monocoupe 90A	Fixed-wing, single engine	Individual owner North Dakota	Standard	1989-10-17	Valid
N11777	Monocoupe 90A	Fixed-wing, single engine	Individual owner Louisiana	Standard	1987-12-07	Valid
N11797	Monocoupe 90A	Fixed-wing, single engine	Individual owner Louisiana	Standard	1987-12-07	Valid
N10765	Franklin 90	Fixed-wing, single engine	Individual owner New Mexico	Standard	1983-09-26	Valid
N16427	Monocoupe 90A	Fixed-wing, single engine	Individual owner Louisiana	Standard	1968-01-05	Valid
N11787	Monocoupe 90A	Fixed-wing, single engine	Individual owner Wisconsin	Standard		Sale reported

Source: FAA Civil Aviation Registry, Releasable Aircraft Database (the engine reference table and each aircraft's engine code), October 23, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.