apullin
Member
- Joined
- Aug 8, 2011
- Messages
- 9
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Hey folks. I am currently hunting around for plans for a small engine to build, something 4-stroke, air cooled, gasoline fueled, ring seals, and as many ball/needle bearings as possible. Something around 35-50 cc's would be great, but I should be able to scale to that fairly easily.
And as far as the "modern" part, well, it would be ideal if it was an overhead cam design. I think the model agricultural and tractor engines, while nice, aren't quite what I'm looking for.
Thus the search for plans, rather than designing from scratch myself: I'd like to start with something that's already been proven to work, and had some debugging.
A single or boxer twin configuration would probably be "best", since I think those are the easiest to make?
Jerry Howell's V-twin engine looked interesting, but I would like to elide the complex gear train for driving the valves, and there's the extra complexity of the oddly shaped crank-case.
Here's a couple that I've been looking at:
http://www.cad-modelltechnik-jung.de/baumotor/1_zy_vier.htm (higher displacement would be better)
http://www.cad-modelltechnik-jung.de/baumotor/4_zy_box.htm (pushrod)
http://hamiltonupshur.tripod.com/ (#2 and #4, pushrod )
Advice? Recommendations? It's all welcome. I will have access to CNC machines for most/all of this work, and I'm a CAD wizard, so none of that should be a hang-up.
And as far as the "modern" part, well, it would be ideal if it was an overhead cam design. I think the model agricultural and tractor engines, while nice, aren't quite what I'm looking for.
Thus the search for plans, rather than designing from scratch myself: I'd like to start with something that's already been proven to work, and had some debugging.
A single or boxer twin configuration would probably be "best", since I think those are the easiest to make?
Jerry Howell's V-twin engine looked interesting, but I would like to elide the complex gear train for driving the valves, and there's the extra complexity of the oddly shaped crank-case.
Here's a couple that I've been looking at:
http://www.cad-modelltechnik-jung.de/baumotor/1_zy_vier.htm (higher displacement would be better)
http://www.cad-modelltechnik-jung.de/baumotor/4_zy_box.htm (pushrod)
http://hamiltonupshur.tripod.com/ (#2 and #4, pushrod )
Advice? Recommendations? It's all welcome. I will have access to CNC machines for most/all of this work, and I'm a CAD wizard, so none of that should be a hang-up.