Hi guys,
Well, here's the engine. Sorry for some dumb comments, but this engine was quite I mess when I got it.
I'm posting it more for the curiosity of finding a 4 stroke, than for the rather doubtful RC usage of it, but here it is anyway.
Some things about it:
- 29cc 4 stroke engine, has 2 side valves (the admission one is slightly larger than the other). It's a Flathead, like some HDs.
- It's a japanese engine, and uses a Mikuni carburettor. It was in fairly good conditions althought it had quite some time of use.
- I guess it is a slow turning engine, as the valve timings are identical to the theoric cycle.
- I'm afraid it has no RC plane usage, but maybe could be used for an airboat or other applications where weight is not so critical, and you can enjoy the popping sound of a 4stroke...
- The oil pan (I don't know if this is the right word) is quite big, in my opinion. Anyway, this engine was probably made to be running all day long and carelessly.
- There's a electric pump or a similar device in that area (see the black thing in this pic). This engine had lots of tubes around (I guess for lubricating purposes). I supose this electrical pump did the job, also oiling the springs and valve guides.
- There's also an automatic throttle control. As the plastic gear spins quickly, that cilindrical object protrudes out of it and pushes an arm, which does close the accelerator (see the link between the arm and the carb). In the previous pic, that cilinder is hidden.
- The flywheel is made out of iron and looks massive, but in fact is about 1cm or so thick (ok, it's massive anyway).
- A view of the oil pan, gears, cam... Notice a small fin in the piston, this should be to squirt oil all over the place.
That small arm on the right is what the cilinder pushes forward when it reaches a certain speed.
- Here you have the springs. There's a metal piece covering this, an it has a tube connected, so I just can figure it is some kind of lubricating device.
Do you think this can be useful for an RC application (as I mentioned before, I was thinking of an airboat, or maybe a fast-build ship)?
Any ideas on how to start?
Thanks!!!
Juan