Recent content by kf2qd

I would not consider a steel boiler for model operation because of corrosion. Most of the model boiler designs I have seen are copper. Copper is much more corrosion resistant, and much easier to work with. Most places do not require a certified boiler for small hobby boilers.

Your rod that you were using for measurements was to big in diameter. you were not measuring the dovetail, you were measuring the corner. And depending on chamfer or how sharp the corner is it will give you different results.

An important factor to consider is the acceleration of the piston as it moves up and down in the cylinder. A longer stroke has higher acceleration as compared to a shorter stroke engine at any given RPM. So you have to consider the forces getting the piston/rod moving and stopping at each end of...

Some engines had 2 balance shafts to neutralize the off center vibration induced by 1 balance shaft. And then you have to look at any of the harmonics that exist in the mass of the engine block. You are trying to balance the crank, rod, piston and block mass, and any harmonics that exist in that...

If your weld looks like you were squeezing a chicken you need to practice a lot more...

With stick welding the rod and the machine are both important. 6013 was called farm rod when I was growing up, the flux helps direct the arc and that also makes it tend to blow thru. If you can get a DC welder then that opens up some more options - For that I prefer 7018 and reverse polarity...

If stain;less is in contact with steel and water it will corrode. Electrolytic action.

If I remember right... The old Triumph and BSA twins had different cranks. Triumph had the crank pins aligned, abd thee BSA had them at 180 degrees. The triumphs had more vibration at certain speeds. My Honda 360 had them at 180 degrees and I had to set the points at 5000 RPM to get it to run...

If changing the Accel corrects the problem them might want to look into adjusting the current limit on that axis driver (a small potentiometer on the board) or updating the firmware in your machine. It is not difficult, involves setting up the correct software for your machine - Arduino or...

If you read the post that started this thread he said that he was thinking about making a diesel-electric unit, and maybe later working on a diesel-hydraulic unit.

First angle is used by the British and Europeans, while the Americans and Canadians do it correctly and use 3rd angle. Making parts for windmill towers is fun, they come from Spain and Germany and the first thing I have to do with any drawing is convert to 3rd angle to eliminate the confusion...

Advantage of electric is that it is clean. The disadvantage of hydraulic is that it tends to leak and thus leave a mess and collect dirt. It is also has less efficient than electric. Size of an engine and generator is comparable to engine, hydraulic pump and oil tank. A 240V generator and a VFD...

That part sticking up out of the cylinder is a condenser or radiator. The moisture (don't quite think it is steam) rises up through that, cools down, condenses and falls back into the water jacket around the cylinder. Could even have the water level part way up in that radiator and increase the...

You might consider making your engine a 2-stroke. It would look good, and with each cylinder firing each cycle it would produce more power for the same size, and fewer parts.

You all might want to look into something that was causing a problem for a close friend. Eat certain foods and his gut would just ache. Traced it down on his own to sulfur. Sulfur dioxide is the bleaching agent in flour and white sugar. Is also present in garlic and other foods. He has to be...