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Radial Engine

Old 06-21-2009, 08:14 AM
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hopkimf
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Default Radial Engine

I have a general question. While learning to use PRO/E Wildfire 3 D graphice, I decided to layout a scratch 9 cylinder radial engine. Not to build it, but just to learn the graphics package. I'm trying to make it technically correct so that everything is right and functional. I have little knowledge of valve train I set it up with a half speed cam ring, but am looking for detail on how it is actually done. I would like to lay in the train properly to get the 1-3-5-7-9-2-4-6 firing sequence. I have staggered lifters, so I need cams in two planes. Does anyone know where I could fnd cutaways or engineering drawings showing this area? I did a little looking on Google Patents but didn't see what i'm looking for.

Thanks,
Mike hopkins
Old 06-21-2009, 08:40 AM
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Default RE: Radial Engine

I have what you are looking for, in cutaway form... will post directly.
Old 06-21-2009, 09:05 AM
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Skratchbilt
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Default RE: Radial Engine

OOps. I found the cutaway detail illustration, but it was for a 14 twin-row BMW radial... no real detail as to the cam plates, but I can tell you, on a nine cylinder, as well as the 5 and 7's, all lifter beds are staggered. The same principle for the cam plate is used for both beds, just configured differently, for timing of coarse. The pushrods were fitted with roller lifters, and the cam plates simply had lobes... you likely know all this. I would look up a radial engine supplier, and request a parts listing, with exploded view. Good luck.
Old 06-22-2009, 03:16 PM
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Default RE: Radial Engine

Scratchbuilt,

Thanks for the comments. I'll try that.
Old 06-22-2009, 10:31 PM
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Default RE: Radial Engine

I believe radials are set up as 1/4 speed cams. Two lobes on each part of the cam so the cylinder has to fire 2 times for the cam to go once around. Check out this group http://groups.yahoo.com/group/R_and_R_engines/
if you join, under files there are blueprints for a 5 cly radial. Also this is good too http://www.modelenginenews.org/

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