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Here's a build log of a BollAero 18 I built over several months in Summer of 2021 and had my grandfather accompany to experience machining. Unfortunately it doesn't turn over. Either the fuel mixture isn't correct or not enough compression. First 10 Pictures of the Build: Crank Case...

I was wondering any of you have sources to find videos of people milling or turning? More specifically i'm not looking for tutorials, but just videos of someone making the parts for their next engine. These videos wouldn't be narrated or heavily edited; really, just a camera propped up...

I am planning to return work on my 8 Cylinder Radial Engine. I have been gifted some very nice brass (three times what i need), and hope to use it as cylinders for the engine. I will be using UHMW for the pistons to reduce wear on the brass. Brass being pricey as it is, I was hoping to make...

While designing an engine in Autodesk Inventor, I looked through the machine screws that they had models for. Looking for screw sizes, a 1/4" screw would be too large, so I opted for a 1/8" screw which is a #5-40. Going to hardware stores I see they have #8, #6, and #4, completely skipping over...

If I wanted to trim down the diameter of an HSS screw machine drill shank how would i go about it? I know aluminum oxide wheels are best for grinding, shaping, and sharpening HSS lathe tool bits, but could I use a Carbide turning bit? ie holding the HSS drill in the lathe chuck, and just turning...

I was able to get my hands on some free 3' worth of 1.5" Brass round, and I'm going to use some for my C-O2 8 Cylinder Radial Engine cylinders. I was originally going to use aluminum for the cylinders, and 303 steel for the pistons. I know that you usually want the harder of the two metals to...

I couldn't find any 5 cylinder radial engine designs that were free, and also the lack of tools right now (4 jaw chuck for square bar cylinders) I decided to design my own from scratch. The proportions of my design just didnt look good, so i decided to try something out of the ordinary; an 8...

Looks interesting. Would be cool to get some plans for this or one similar. http://www.youtube.com/watch?v=Ck4nID61rso Has a pretty cool spring starter too! :) Ian

I bought one of these oil cans today from KMS Tools: http://www.kmstools.com/performance-tool-1-4-pint-oil-can-4940 To test it out first I filled it with water and tightened it but it didn't seem to squirt out the water that nicely it barely sprayed out the water and it wasn't a nice steady...

I have bought very little in materials so far, so i do not have much experience in the raw dimensions of material. I've bought 1" and 2" diameter Aluminum round, and when i brought it home my caliper said they were 0.06" oversize. This is good so as we have some leeway to get a good finishing...

Wondering if anyone knew of free 3 or 6 cylinder radial engine plans that use 2" or 1" round bar for the cylinders. Would like to start building my first engine. Compressed air powered. I have minimal materials right now: -2" 6061-T6511 Aluminum Round, -1" 6061-T6 Aluminum Round and Minimal...

Well, since i found out that carbide bits from HF aren't good since they dont have any rake and angles. Yesturday i went to one of the machinist stores in my area (KBC TOOLS), and picked up: 5 HSS blank tool bits, some Cutting Fluid, and Engineer's Black Book, USA edition And...

A little random, but it's the break room, wont clog up the important forums. This might be one of those things that you just have to pay up for, but i might as well try. I want to buy a 1" 8TPI DIE so that i can thread some 1" rod. This is to make a new shank for the Grizzly 3" 4-Jaw mini wood...

What is required to set up the spark plug systems in model IC engines? how do you get the timing for the sparks, and where does the electricity come from to create the spark. Can you buy miniture spark plugs to use, can you use full sized automotive plugs from the Big Box stores (such as...

I remember seeing these videos a while ago, and now that i'm really interested in model engines, i've come to appreciate them alot more, having understanding the amount of skill and energy to make them: First vid i saw: https://www.youtube.com/watch?v=mutb7KgA9NM&feature=related Spark Plugs...

Compressors can run out of air power quickly for some engines that require alot of it. Shop vacs and regular home vacs can get pretty powerful and are constant compared to compressors. Any possibility of of running an engine using a vacuum? Ofcourse the engine would run in reverse, with the...

Browsing through this forum i've read people mentioning they used a certain type of steel (example but might not be a real grade: 6506 Steel) What does that mean? Is the higher the number, the harder the steel is? Should i not have too hard of a metal since it will be harder to machine? If i...

Hello, I've been roaming this site for a while now; looking at people's amazing engines. I've spent alot of time going over kcmillin's Tiny Inline 4 Cylinder IC Engine, keith5700's 1/4 scale V8 Engine, and stevehuckss396's Small V8 Engine. I'm thinking of making my own IC engine. Since I wanted...

Been looking at the $500-ish ones How good are they? Are they suitable for a newbie hobbyist? Are they safe? i heard that if you have any big pieces that are at all unbalanced can be really dangerous. Are they junk? I'm not using it for commercial use, so is it that bad? I know they're chinese...

Decided i wanted to try to make an elbow engine. I don't have tools right now to machine metal, but i do have wood working tools. I picked up some industrial grade plastics which have an extremely low coefficient of friction. Since plastic is made from oil, and this plastic that i have is very...