Avia M 337
1960s Czechoslovak piston aircraft engine
title: "Avia M 337" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["aircraft-air-cooled-inline-piston-engines", "1960s-aircraft-piston-engines", "inverted-aircraft-piston-engines", "walter-aircraft-engines", "lom-praha-aircraft-engines"] description: "1960s Czechoslovak piston aircraft engine" topic_path: "general/aircraft-air-cooled-inline-piston-engines" source: "https://en.wikipedia.org/wiki/Avia_M_337" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
::summary 1960s Czechoslovak piston aircraft engine ::
::data[format=table title="infobox aero engine"]
| Field | Value |
|---|---|
| name | M 337 |
| image | WalterM337engine.JPG |
| caption | Right side view of a Walter M337; the front cylinder is hidden by the engine cowling |
| engine_type | six-cylinder inverted inline piston engine |
| national_origin | Czechoslovakia |
| manufacturer | Walter Aircraft Engines/Avia/LOM |
| major_applications | |
| :: |
|name =M 337 |image =WalterM337engine.JPG |caption=Right side view of a Walter M337; the front cylinder is hidden by the engine cowling |engine_type =six-cylinder inverted inline piston engine |national_origin =Czechoslovakia |manufacturer =Walter Aircraft Engines/Avia/LOM |designer = |major_applications = |produced = |number_built=
The Avia M 337 (originally designated the Walter M337) is an inverted six-cylinder air-cooled inline engine. It was developed by the Czechoslovak company as a six-cylinder derivative of the four-cylinder M 332 engine, going into production in 1960. An unsupercharged version of the M 337 is designated as the LOM M137. Production transferred to Avia in 1964, and to Letecke Opravny Malesice (LOM) in 1992.
Variants
;M 337A: Basic supercharged engine - not rated for aerobatics ;M 337R: Modified for pusher installation ;M 337AK: modified oil system for unlimited inverted flying. "Snap" aerobatics permitted. ;M 337AK1:AK fitted with alternator instead of generator ;M 337B:Increased max running speed (3000 rpm) - increased power - 235 hp. ;M 337BK:Aerobatic version of B. ;M 337C:Increased compression ratio - 252 hp ;M 137A: Unsupercharged version of M 337 180 hp take-off power. Aerobatics allowed. ;M 137AZ:As M 137A, with filtered air feed ;M 437: Gear ratio 0.7:1 240 hp
Applications
Specifications (M 337)
and start a new, fully formatted line with -- |ref=Jane's All The World's Aircraft 1980-81 |type=6-cylinder inverted air-cooled supercharged inline engine |bore=105 mm (4.13 in) |stroke=115mm (4.53 in) |displacement=5.97 L (364.3 in3) |length=1,410 mm (55.51 in) |diameter= |width=472 mm (18.58 in) |height=628 mm (24.72 |weight=148 kg (326.3 lb) |valvetrain=OHC two camshaft operated valves per cylinder, sodium filled exhaust valve |supercharger=Centrifugal |turbocharger= |fuelsystem=Low-pressure fuel injection |fueltype=Min 72-78 Octane |oilsystem=Dry sump pressure feed system |coolingsystem=Air-cooled |power=157 kW (210 hp) at 2,750 rpm (take-off) |specpower= |compression= |fuelcon= |specfuelcon= |oilcon= |power/weight=1.06 kW/kg (0.64 hp/lb) |designer= |reduction_gear= |general_other= |components_other= |performance_other=
References
- http://www.walterjinonice.cz/historie-spolecnosti-walter
References
- J W R Taylor 1980, p.692.
::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::