The U.S. aircraft register, updated daily
Engines · piston (reciprocating) · data as of November 5, 2026

Keikhafer MK55

1 aircraft on the U.S. register carry a Keikhafer MK55 engine, rated at about 40 horsepower. The Bede BD-5 is the model most often fitted with it (1 aircraft).

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 Keikhafer MK55. FAA spelling: MK55.

Fuel: 100LL avgas.

Fitted to model families

Bede BD-51
Model families, as a table
aircraft
Bede BD-51

Bede BD-5

Where they are owner's state

Wisconsin1
By state, as a table
aircraft
Wisconsin1

Kind of aircraft

Piston singles1 (100%)
By kind, as a table
aircraftshare
Piston singles1100%

When the aircraft were built by decade

0001111970
By decade built, as a table
aircraft
19701

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

Where they are
Biggest operators
Analytics

The whole map of how records connect · these connections as data: /graph/engine/keikhafer-mk55.json.

Aircraft newest certificates first · 1

Tail no.Maker and modelGroupOwner and baseCertificateRegisteredStatus
N500BD Bede
BD-5
 Fixed-wing, single engine Eaa Aviation Foundation INC
Oshkosh, Wisconsin
 Experimental 1982-12-22 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), November 5, 2026. Horsepower and thrust are the FAA's figures for the series, not for a particular aircraft.