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My problem: I need to drill a blind hole 1.250" diameter, about 19 inches deep into a piece of round bar stock, 3.00 inches in diameter. I have a .750" drill bit 18 inches OAL. This will give me a pilot hole approximately 17.500 inches long. I could open the pilot hole with larger diameter...

Is there a simple relationship between bore diameter and cooling-fin diameter? If I want to air-cool a cylinder with 1.500" bore X 3.00" stroke, how large a diameter should the cooling fins be, how many, and made from what materials? Surely, cooling fins made from Aluminum will radiate heat...

To all Forum Members... Would very much like to contact a Mr. Harold Bull of Northampton regarding the purchase of plans/drawings, etc. for his 4 Cylinder, 60 CC, Tooth-Belt Drive, OHC-Aero Engine. (Bar-Stock construction? Castings?). This engine can be seen in a You-Tube video posted by...

Planning to turn a Black Powder, cannon barrel on lathe. Depending on the size of the steel that is available, the 1.00" - 1.250" diameter bore will be approximately 15"-18" deep. OAL of barrel: approximately 22" breech to muzzle. I am willing to buy a Long Boy extra-length, drill just to do...

Can any one direct me to the drawings/plans for this vintage engine? Are there any model-sized versions of this engine? This engine features a cam-controlled exhaust valve, atmospheric intake valves, open sided crankcase design. Thanks for any help. Frank

There are a number of beautifully made engines by "dickinohio" (Dick in Ohio) posted on You-Tube. I would like to contact this man but do not know how to e-mail him to ask him questions about his engines. I want to contact this gent privately, and rather not ask him questions regarding his...

Over the last months, I have viewed many YOU-TUBE videos showing very clever, and also interesting compressed-air engine designs using "LEGO" building blocks and various other parts. The engine, especially some of the linkage configurations are fascinating to see work, and spin. Question: Are...

Just recently, in New York City, a 19 year old was killed when his RC helicopter went out of control, and sliced through the veins/arteries in his neck, and sliced off pieces of his scalp. Before he could be given emergency treatment, he exsanguinated in front of horrified onlookers...

Want to make a large, knife-blade, and will attempt to hand file the bevels. I've viewed some videos showing "draw-filing" techniques. The process doesn't look too easy. I see, maybe some blood, a lot of sweat, and a few tears, in my future. The blade will be a representation of the WW-l...

A company named "WILTON" has been making decorative plates, serving trays, candle sticks, platters, pitchers, creamers, etc. for years. You can find their products in stores that sell dinnerware and gift-wares. These items are made from an Aluminum-type material known as "ARMETALE". Most of...

I want to make a single cylinder, AIR-COOLED model gas engine. Bore: 1.00" - 1.250" Stroke 1.50" - 2.00" Spark Ignition, conventional, Aluminum cooling fins on cylinder and head. Scratch-built from weldments, and bar-stock. Can I make it a six-stroke, by turning the cam at 1/3 crank speed, and...

I have intentions to build a full scale, single-cylinder, air-cooled, 4-stroke motorcycle engine based on a 1906 design. I will be using weldments, scrap steel, and bar-stock. to construct the various parts. The engine is based on the 1906 design outlined in the Hasluck book. Bore: 2-1/2" -...

I have a question....well, some questions. Can an atmospheric intake work on modern design, model gas engines? For example....take the "Hoglett" V-Twin....can atmospheric intake work on this kind of 4 stroke engine, with a cam controlled exhaust valve? Is this type of valving used only on...

I am new to this forum, and enjoy reading threads that were posted before I joined. The "Search" option is very narrow in scope, and unless you search for a specific topic, the search is not useful. Besides, how do I know/would I know, what topics were posted in the past. Is there a general...

The "HK Motoren" site shows a prototype, R2A1, 100cc air-cooled, gas engine. I would like to purchase the drawings. I tried contacting the company, and asked if plans were available, but I have received no reply. I like the "look" of the outside-the-crankcase camshaft, engine size, etc. In...

Just recently, I read an article describing, and showing a method for making model engine pistons with crowns consisting of two or more pieces, stacked, in the crown area for easy, distortion-free ring installation. I cannot find the article, nor the photos. I don't even know where to begin to...

Just bought drawings for a 100cc, 90 degree, V-6 Glow-Plug engine. The engine-build will be complicated, and a little daunting for a first-timer. I will not attempt to build the engine now, but I'll wait until I acquire more machining skills. Some generalized questions: Could I just build a...

Drawings have arrived....now what? After assembling all that's needed, metals, tools, etc, what would be the logical place to start the machining process. Crank, pistons/cylinders, crankcase? What's the most efficient way to build an engine? What parts would you make first? In my way of...

Recently acquired many drawings from Germany and other European countries. If course, all the parts, etc are dimensioned using metrics. I remember reading, many, many, years ago, that if you use the metric dimensions and put them over 32, changing it to a fraction, you will construct the...

Can Oilite, and bronze bushings be used as cylinders when building small compressed-air engines? If yes, what material for the pistons? Or, can Oilite bushings be used as a piston, and run against a mild steel/stainless steel cylinders for C-Air and Flame-Eater engines? Just asking. Frank