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L H Spareys 0.63 Aero Diesel engine

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KEITH BEAUMONT30/10/2019 15:45:30
79 forum posts
19 photos

dsc03865.jpgdsc03862.jpgHave just completed and run this engine. Casting and drawings from Hemingway Kits. It started easily ,once I had the settings correct and has had four runs of three minutes each, so far at 5600 RPM with an 8x6 inch nylon prop. I have differed from original design with the cooling fins and made a collet type prop driver. The original had a steel driver locating on an 0.020"step in the crankshaft. Crankcase has been bead blasted plus red anodising for the other external aluminium parts . Working this small has been quite interesting.


Neil Wyatt30/10/2019 15:48:35
17891 forum posts
706 photos
77 articles

Lovely. Perhaps I'll revisit the one I started about 16 years ago...


ega30/10/2019 16:10:07
1710 forum posts
150 photos

I see that Hemingway Kits have "L W Sparey"; L H is, of course, the author of the excellent "The Amateur's Lathe". Were there two and, if so, were they related?

KEITH BEAUMONT30/10/2019 16:47:41
79 forum posts
19 photos

Thanks Neil. That sounds like a good idea while we can still buy fuel.

ega, they are one and the same. My Hemingway catalogue quotes LH Sparey.


ega30/10/2019 16:53:25
1710 forum posts
150 photos
Posted by KEITH BEAUMONT on 30/10/2019 16:47:41:

Thanks Neil. That sounds like a good idea while we can still buy fuel.

ega, they are one and the same. My Hemingway catalogue quotes LH Sparey.


Thanks. I was looking at the interesting website entry.

Emgee30/10/2019 17:09:10
1485 forum posts
217 photos

Hi Keith

Nice looking work, the anodising certainly brightens the engine up.

Is the piston the wrong way around in the picture, if not there's a lot above the pin.
Did you leave the back of the crankcase out, I see a retaining ring.


KEITH BEAUMONT30/10/2019 17:14:58
79 forum posts
19 photos

Hi Emgee,

The piston is the correct way up. This is typical Sparey.

The matt surface of the backplate makes it look like a ring in the photo.


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