Search results

Thank you, honestly I was 27 when I built this motor and had owned a lathe for 2 - 1/2 years. I had never used or touched any type of lathe or mill before I bought one. Never had any formal training, just had lots of questions and do alot of reading in places like this forum. Then spent even...

It was very smooth at all rpms. I built a single cylinder .27ci flat head 4 stroke turning a 9" prop that vibrates that same test bench much more. Stroke is 31mm, bore 35mm

Thanks everyone for remarks. Sorry for the late replys, have not been on the forum in a while. You are correct, the bolt is located between the pin hole and counter weightfor clearance. There is very little room inside the crank case. I had to drawthe entire motor in solid works in order to...

The highest temps are normally during startup and acceleration. Startup will see 550 -590, accel can be 600 or higher depending on the current rpms, Idle is about 500, full rpm is 570 and in the mid range rpms the temps are the lowest arround 450. When I was playing with the tailcone my first...

It is a annular chamber. As far as I know these are the only type that have successfully been used on this size of an engine. It has 6 injectors and the air flows into the combustion chamber though the inner diameter as well as the outer diameter. The picture show the chamber from the rear...

I have never built one from a turbo. The combustion chamber design is what makes the engine. I have never designed my own but from what I have read getting a stable flame that burns evenly without overheating the chamber is very tricky and every small detail plays into how it burns. Harold it...

I bought the compressor. The plans call for a KKK5326 2019, The one I used is the same size but has a differnt radius on the blade shape not sure what the part number is though. Geoff

The combustion chamber is made from 0.015" 316 ss. The end caps are spun on the lathe then spot welded to the inner and outer wrappers. A spot welder was made using a transformer from a microwave that had the secondary winding replaced with 6ga battery cable. Most of the parts are 6061. The fuel...

Hello, this is my latest project after the opposed 4 cyl 4 stroke. Its a small gas turbine based on a design called a Kj66. The bearings, compressor, turbine wheel and starter motor where purchased everything else was made. The compressor is 66mm diameter. It self sustains at 22000rpm idles at...

Had another good test run today after some intake tweaks. 600 rpm idle 5200 at 3/4 throttle. It hits the wall at 5100-5200rpm with throttle remaining. I think the valves are starting to float. Next step will be to make a stiffer set of valve springs and a stronger set of pushrods...

Thank you. I live in Port Rowan south of London on the lake shore. So far it idles at 1000-1200 rpm, have not ran it above 4500-5000 yet. The heads have only got up to 140 farenheit so its not working very hard. Have some more pics and a short video posted here...

Thanks to everyone for the kind words. I live south of Woodstock in Port Rowan. Not sure if I am going to fly it. I have never had a plane bigger then 28% and this would need 35% or bigger, a big investment in money. Also it goes through alot of glow fuel. On gas it would be much cheaper to...

Thank you. Im not a profesional machinist. Just like to tinker and make things. Geoff

Hello, im 27 and live in a small rural area of Southern Ontario. Ive flown rc airplanes and helis for over 10 years so this hobby was a perfect step. I have been reading here and learning sense before I started this hobby. I purchased my first lathe 1.5 years ago and got my mill 1 year ago with...

Everything put together and ready to run. Now the real fun starts, to try and refine it.

The carbs are standard RC carbs with new throttle arms made. The first cam was made of W1 but when hardened twisted and was not usable. All part of the materials learning curve I guess. The 2nd cam was redesinged and made of O1 and was thicker diameter between the lobes to try and allow it to...

Here is the 2nd version of the crank and rods. Crank is again 1144 and the rods are 2024 with bronze bushings in the small end. the big end is reamed and held together with 2x 2x56 screws. The crank is made in 2 parts and turned between centers. Not shown is the coupler that holds the center...

This was the first crank built to the original drawings. Its turned from 1144 and the rod journals are hardened shaft. There is a splined connection to allow for 2 bearings in the middle of the crank. Everything is held together with machine screws. The crank proved to be weak and in the first...

Thank you. Everything was made manualy on a 13x40 Import lathe and 9x46 Wells Index mill.

The head gaskets are turned from .005 copper shim stock in aluminium jigs the other gaskets from .020 copper. The rings are cast iron and made using a technique from SIC where they are turned to size then heated on a mandrel to hold the new shape. The fuel splitter is brass and silver...