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You will find that if your slot is shaped as a one way clutch the drill will disengage smoothly when the engine starts. Image would have the angle on the back side left as hidden line.

Well....no it does not. Simple, effective, durable and available components enhance and grow interest in modeling engines as in many other hobbies. If carburetors, gears, design software, ignitions, casting kits were not available, this hobby would revert back to the exclusivity of retired...

An apple pie and about 3 dozen chocolate chip cookies sounds about right.

AHHH! So close..... with diagrams and a text letter (too small to make out) about the engine too! Heartbreaker.

Thanks rapmoz. Got an idea of scale now with you ruler. 20cc seems reasonable. Your instinct on the intake manifold is right. If that is the manifold gasket in the photos of the carbs, that's a good guide to the throat size of the carb originally on there. You can fill a cylinder with a lite oil...

I was thinking direct draw off the fuel tank. A .15 carb is plenty for a small 20cc gas engine. The .46 carbs might work but really large for that capacity of a low RPM engine. How did you determine its displacement? If it has a fuel pump, most likely a larger engine. Maybe something out of a...

A Chris Craft Corvette from the 50's. If you have no history on the model, rummage around on the model watercraft forums. Seems like that engine and transmission might be a commercial product. But if no script or numbers on the block, a great engineer put his love into this marine project! You...

You see pewter as a metal for jewelry, cast figurines and utensils. Soft metal. Unlikely suitable for machining and drilling.

A nice presentation Minh. Smooth at low RPM. Quiet running too. --- Dave

I find that cloudy looking silicon fuel lines swell in Coleman. The weed wacker/lawn mower red vinyl fuel lines are very stiff. Clear vinyl tubing works well and can bend to tight radius. You can order some Delrin round stock for the cap if your fuel bottle is up right or cap the ends of a tube...

Let's get back to your ex. valve timing. Looking at your video Bob, I see at 4,8 and 17 seconds the ex. valve just closed and the con rod looks high on the crank web, too many degrees after TDC. You have very little draw left on the in. valve and that's why nobody sees it moving and also...

Yes, In continuing the legacy of the hobby for newbies, Falcon has answered the the number 1 question on, "how do I start out"? A thoughtful layout on how to proceed. Read a lot, acquire build materials and understand what is best for what areas, the importance of tolerances in dynamic modeling...

Check your valve closure for leaks using a compressor blow off nozzle (at single digit PSI) thru the spark plug hole. Your spark timing should be at TDC. One turn open on the Traxxas carb. Throttle open near a quarter or less. Your ex. valve should be closed at TDC. If you are getting fuel mix...

Inline triple. Unusual transverse crank drive. Valve blocks. Geared crank segments. Right angle cam drive. Verticle fuel tank. Dual fan cooled. Build log.

Thanks Zebdog. You can always tell who the retired modelers are. Can spend more hours on the hobbies!

A 20cc two cylinder model engine, WEDGE RUNNER is built on a canted forward frame base. Twin camshafts, dual carbs, belt driven rear shaft flywheel plus it's cylinder angle find a way to express a hint of a parallel twin motorcycle engine as well by profile viewpoint the stance of a classic...

A pair of carburetors thread into the valve blocks with a short tube of Delrin. More of a fuel mixer with a fixed bore, they do not throttle and a narrow rpm range is set by needle position and ign. timing advance. The horizontal deck plates get a film of 3M Scotchbrite reflective vinyl. Makes...

With no parallel shafts to belt drive the fan, a right angle drive of gears brings in some power. With the camshafts overhanging the edge of the cylinder head plus a space between the valve blocks, it is a straight intersect with the fan shaft. A brass bushing mounted for the vertical shaft...

The rear deck plate is some thinner 3/16 in. material. Looking at both maintaining the inclined rake of the cylinder deck or a parallel mounting with the table surface. I go with the cyl. deck match. Looking to put a cooling fan on WEDGE RUNNER. I start with a bulkhead connector cut and...

Not too many Stirlings shown doing work beyond just turning their flywheels. A good transmission can make the low torque engines show some drive to accessories. Well done!