This site provide an overview of what I went through to convert a Viet Nam era military standard engine so I could use in on a light motor Glider type aircraft.
Modifying a Military Standard 4A032 Engine for use in light HomeBuilt Aircraft.
The 4A032 is a four cylinder, horizontally opposed, air cooled engine. It has a displacement of 32 cubic inches which is about 500cc which in turn is about a third the size of a 40 horse power VolksWagen engine of the mid 60s.
New engines that have come out of military storage and good used engines are available on the supplus market. A similar two cylinder 42 cubic inch engine and a 4 cylinder 84 cubic inch engines are also available. There is also a 53 cubic inch opposed 4 that was used on the M274 Military Mule vehicle that I am aware of but have not seen for sale. From its pictures this engine looks like a very nice engine.
24 Feb 04: Start
This file will be updated from time to time as I get more done on the project. Recommend checking in once every few weeks. Relevant comments from correspondents will be included in the comments file so all the information is one place.
The pictures are numbered sequentially.
The file contains a detailed record of the conversion of a Military Surplus 4A032 engine for use as an experimental aircraft engine. I hope to tell you the kind of thing you will not find any where else and thus make this file a useful resource for the group of experimenal aircraft ehthusiasts that will be using these engines.
This is a used engine. I paid $200.00 for it plus $75.00 for shipping from the North West. I am in Illinois. It came UPS and was not well packaged but survived the trip essentially undamaged
The engine seems to be complete except for the front shrouding around the air impeller/flywheel. It came with the mufflers but without a gas tank or starter. There were no bad dents in the shrouding. I was promised that the engine does not smoke and runs strong.
I was surprised to find that I could pick the engine up without difficulty. Very light for an engine of its size. A pleasant surprise.
I do not, at this time, have a manual.
Photo 1 ID#642 Engine as seen from the right front.
The shrouding that goes around the flywheel fan is missing on this engine. Propellor goes on this end
Photo 2 ID#643 Back of the engine showing governor and ignition equipment. The filter will be relocated if it is in the way. Exhausts will be removed.
Photo 3 ID#64- Back of the engine again showing closeup of governor and ignition equipment.
Photo 4. ID#64-The propellor end of the engine. If you want to use an electric starter then the ring gear has to remain and the propellor mounting has to go to the end of the flywheel on the 4 bolt holes shown.
The average page in this series will be limited to about 4 photos to keep the down loading time reasonable.