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I had found some information. They seem to just lump in the Aspin valve engines with rotary valve engines. https://en.wikipedia.org/wiki/Aspin_valve and http://www.aspin.info/ They had a model engine review of the HP VT-21 engine here where they took it apart to view it: HP VT-21 I ran across...

That was a 135v pulse applied to the primary coil of the ignition coil. yes some coils do use a higher voltage pulse. The higher the voltage the smaller the coil can be made. With modern cars the coils are actually individual for each cylinder and spark plug and the coil is really small so it...

yeah, one can use points. You can use 5v for powering it. The Hall effect sensor device is basically a transistor with a open collector output. The CDI unit typically has a pull up resistor built into it. Thus with a RCEXL unit one ought to be able to simply run the red wire to the contact...

Anatol, there is also the way Ducati and some others did it with poppet valves. They use the cams to both open and close the valves. They only use weak valve springs to help close the valves for starting and idling. it is Ducati's Desmodromic valve system. Thus they solved the problem with...

I remember a number of years ago measuring the voltage driving a GY6 type coil and I was seeing 135v pulse levels. That was on a Chinese scooter with a 250cc engine Linhai copy of the Yamaha engine at the time. Plus I got the same thing on a Chinese Roketa 150cc scooter using a copy of the GY6...

maybe it would, but it looks more like a magneto kind of a ignition device to me though. So I am not sure. I would go with no it is not suitable unless you are going to use it like a magneto setup. I would need more information about it. Something like the EMGO 6v ignition coil would be the...

I missed your previous thread until now. I like your thoughts and ideas.

One problem was combustion chamber shape and then compression ratios. The rotary drum valve engines and top hat rotary valve engines are limited into how much compression they can get. The flat disc or Aspen Valve engines came out to help solve that problem. Then there is the combustion chamber...

Those small motorcycle or scooter or moped coils do work OK. But with CDI systems, they may be applying a higher voltage such as 40v or 80v even to drive the ignition coil. The main limitation is the voltage needed and the size and weight of them. for stationary or display engines or boat or...

You can peruse the model engines reviews here for various model engines such as the rotary valve and sleeve valve engines. http://sceptreflight.com/Model%20Engine%20Tests/ For example: OPS 1.20, RCV engines, HP VT-21, and Webra T4 series engines. Some of the articles or reviews go into more...

These engines don't use poppet valves: You can look it up but HP made the VT-21, 25 and 49 series of Aspen valve four stroke engines. It tends to remind me of a Ducati motorcycle with the shaft drive to the overhead Aspen valve. The Webra made T4-40, 60 and 80 (and maybe a 91) drum valve or...

A company in California made a supercharger for a Saito glow Rc engine years ago. They did it to showcase their machining skills for customers. But it works and it does look really cool too.

Oh yeah speaking of little superchargers. RB Innovations make and sell superchargers for small RC car glow engines: https://rbinnovations.com/collections/super-chargers-to-fit-associated-brand-chassis There is something like a scale effect that takes place with small engines and superchargers...

Way back circa 1979, Webra took two of their 10cc glow engines and made a mount for them and used a gear drive to couple them together. That was when the large size pattern planes were coming into play for the Las Vegas Tournament of Champions pattern contests. Later Webra made a single cylinder...

I remember being at our local hobby shop some years ago and seeing a couple of unusual engines. Both used a common combustion chamber. One is a twin cylinder engine and the other is a three cylinder radial kind of engine. The engines were rather grungy looking so the original owner must have run...

Thanks I look forward to being on the forum more and involved too.

Hi everyone. I have been lurking off and on for quite a while and thought I ought to introduce myself. You never know what will happen and I might need some help or to offer some advice. I have been machining little things and odds and ends over the years. But maybe I will get a chance to make...

I am not a expert machinist by a long shot. But I try. I live in Texas now, near Dallas. I have a Sherline Lathe and a small milling machine, as well as some other motley items like a drill press, arbor press, etc. Most of my machining has been to fix things so. For example the first job I used...