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Kadora, You should to be able to get any functioning engine to run at constant speed on propane gas using most any carburetor. Variable speed is more difficult and requires tuning a carb to the engine. In either case, it will require a gas demand regulator (plans available on the net) and a low...

Massimo, Timesaver compounds will not charge a lap, and their abrasives break down quickly and quickly stop cutting just as their website indicates. They are primarily made for smoothing bearings and mechanisms. Because Timesaver compounds do not embed, their yellow compounds can be used on soft...

100model, The Bruce-MacBeth engine is barstock except for the flywheel castings. If you are interested, plans for the engine started in the current issue of Home Shop Machinist magazine. Jeff

100model That's a nice model generator. I admire your pattern and casting work. I have added a PM Research DC generator to one of my small model IC engines and I built a larger PM excited alternator from a ceiling fan stator for a my 4 cylinder IC model engine. The alternator is loosely...

Gunna, I am curious, in the air blast diesel, do you know at what point in the compression stroke the fuel and air blast is introduced to the cylinder? It would seem that it would have to be quite early. Jeff

Terry, Valve seates can be a bugger. I will give you my method for making and testing valve cages. It may not be the best method, but it has worked well for me. I generally use aluminum, or phosphor bronze for my valve cages, but brass has also work satisfactorily in one of my engines. I do...

Chuck, I hope to be there. I know Doug is looking forward to being there also. I am looking forward to seeing your SB running. Jeff

Nick, I saw you posting regarding your MAN diesel engine project. Your project looked very familiar to me. A few years ago I found a website of an Italian model builder named Emidio Gattafoni who built a working model of an early Sulzer 2D-30 air injection diesel enigne. He also built a Sulzer...

I have tried just about all of the methods for verifying the seal of engine valves. In my opinion, the best, and easiest use method for leak detection is the simple brake bleeding hand vacuum pump equipped with vacuum gauge. It readily indicates any leaking valve and also gives you a very good...

Joebiplane, Here are the only photo's I have of my X3 spindle locking modification. That's the underside of the gearbox top cover. The spindle projects out the top of the gearbox through the large hole shown. This spindle lock is quicker and easier to use that the lock on a Bridgeport spindle...

Hi, I have had an X3 for about 7 years. Been a good little mill so far. The first and only thing I modified was a spindle locking device for changing tools. My locking device is simple. It is a brass plunger with a retracting spring and a mushroom head on the outside. It is located on the front...

I've tried numerous types of brooms, and gave up on them. A good small shop vac with both a long floor attachment and a small short nozzle for the bench and machines works better than a broom for me. I have a small shop and I have to clean up regularly to keep from tracking swarf upstairs into...

John, Neat engine indeed! I can certainly see the Bill engine lineage. What is your design compresssion ratio? Sounds like you have the fixes pretty much figured out. Keep us posted. Jeff

John, Nice looking engine. We all would like to see more views of it. I see you are using a propane fuel system and my guess it that the fuel system is your primary "running" issue. Using an RC type carb with propane is tricky and not always successful unless you can tune it to the engine...

I have a Bill engine and it won't run much below 1000 RPM. The flywheel, as designed, just can't get it over compression. I believe the compression ratio is 5:1. A two cylinder wouldn't be as susceptible low speed compression stall, but will be affected at some point. My suggestion for multi...

Manfred, Yes, that is the same website I used for understanding and minimizing my dynamo cogging issues. My fan stator core is 25.4 mm in length. I used the helix method with skewed neodymium bar magnets, and my cogging torque is very low. Neodymium magnets are usually the first choice for...

Manfred, I am very impressed with your work on your dynamo project. I am particularly interested in the air coil design you are using. I have reviewed information on both the axial and radial air coil designs, and your adaptation to a model dynamo is quite unique. I have built two model dynamo...

Hey Tin and Cheep45, I have been to a lot of shows, but never to Kinzer's. Maybe this year! Do you guys display models or larger engines at Kinzers? I do make it a point to attend the mid June show at the Coolspring Power Museumt. 250+ old engines on permanent display (mostly LARGE engines). A...

Looking through my old MEB magazines today I noticed a small "tip" about not storing model engines with detergent oil in them. The tip indicated that this leads to internal rusting. The rusting potential inside model engines is very real, but I would suggest that it isn't due to the type of oil...

Nickademusss, Nice boiler. Been thinking about one of these. What type of solder does PM recommend using on their boilers? Jeff