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Homemade .15

Old 10-23-2003, 07:31 PM
  #1  
maxtenet
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Default Homemade .15

Here is my homemade .15
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Old 10-23-2003, 08:18 PM
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AMB
 
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Default RE: Homemade .15

OK I know-- the Hobby shop was closed Sunday ----so I made one--.(Just kidding Max)
very impressive project , great looks, I cannot put a plane together in any
reasonable time and you build an engine, please keep us informed how it does
Nice to see some American engineering
Old 10-23-2003, 08:43 PM
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ajcoholic
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Default RE: Homemade .15

Hey is that a David Owen Mate 15? I have 3 or 4 of those extruded crankcases waiting to be made up...

Looks very nice. If it isnt a Mate, is it one of your originals? More details please!

AJC
Old 10-24-2003, 02:20 AM
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rclooney
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Default RE: Homemade .15

how did you make the crankcase? I want to start an engine but i dont know how to make a case.
Old 10-24-2003, 06:27 AM
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ajcoholic
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Default RE: Homemade .15

rclooney,

If you want to make an engine, they best way is to buy a set of drawings and castings (usually the crankcase is cast, and perhaps a few otherparts) from someone.

I have about a dozen I cast and sell, or I can also suggest other people I myself have bought castings from.

What kind of engine would you like to build?

I am pretty sure that the engine Max has a pic here of is called the "Mate", and designed by an Australian, David Owen. He is a well known engine builder who works with Gordon Burford (probably the best known Aussie engine man). David had his crankcases extruded from 6061 and then sold a piece large enough to make a crankcase, along with the detailed drawings and machining instructions. They are no longer available, however.

AJC
Old 10-24-2003, 07:39 AM
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Default RE: Homemade .15

There was a three or four part article in Model Airplane News back in the 50's on building a .19 diesel called (appropriately) the MAN 19. It included drawings and the written text. If I remember correctly, it had step by step instructions, including what metals and why. Don't remember any performance figures.
There was another engine with square fins built as a "shop" project in a school. Can't recall the particulars on that one.
Perhaps these will jog someone's memory.

George
Old 10-24-2003, 02:24 PM
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maxtenet
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Default RE: Homemade .15

It actually is a "mate". The crankcase was a piece of extruded aluminum that hade to be machined. This was my first project from 1996. It actually runs quite well. It was done completely on a Taig micro lathe.

Max
Old 10-24-2003, 08:12 PM
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ajcoholic
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Default RE: Homemade .15

WOw! Thats a large project for a Taig. The biggest thing I did was a swashplate for a 60 size model heli on mine, but thats a while ago..

Without thread cutting, the Taig is a limited machine when it comes to engine building, but man it taught me a lot about me talwork (it was my first lathe and first experience in metal machining).

Here is a blank for those interested in seeing what Max had to start out with.

AJC
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Old 10-24-2003, 11:04 PM
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Default RE: Homemade .15

If I put that under my pillow at night will the tooth fairy make me one?
Old 10-25-2003, 06:01 AM
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rclooney
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Default RE: Homemade .15

yes, but it will take away the old one.
Old 01-16-2015, 09:39 AM
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peterdivergbr
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Hello Andrew.

I am very interested in constructing a model diesel engine have just been presented with a mini-lathe as a Christmas/Birthday/Retirement present.

If you have any suitable kits for sale I would be delighted to purchase one from you.

Would you reply to

[email protected]

Thanks and best wishes

Peter Armstrong
Old 01-25-2015, 06:45 AM
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Hi Peter:
Probably the simplest homebuilt engine is the Boll Aero 18. You can find plans for it if you do a search for "Boll Aero Plans". There is a lot of room for creativity in the build as you can see in the images at http://www.modelenginenews.org/bollaero/index.html Mine is the one with the black anodizing. I made the bore .527 instead of the .500 as shown on the plans to get a displacement of 2cc. This has fairly restrictive porting which makes it very docile, but as as with most sideport engines it is not a ball of fire as far as power goes. Mine turns a 9x6 APC at 7200 to 7500 rpm, but this should be quite adequate for a light, slow flying plane. Since the pics were taken I have made a carb for it and it idles down to around 2000 rpm. Since nothing is bushed you might think about using 2024 or 7075 aluminum for the conrod and the crankshaft housing.
Not that it really matters, but David Owen's Mate design is a 2cc, making it a .12 cid.
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Last edited by senior_falcon; 01-26-2015 at 04:03 AM.

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