Hi Dennis;
I was well aware of all of that, as I said in my post, OS has been working on this for quite a while. And I have noticed that no one is using them anywhere in control line in any fashion. Limited market means limited production which means higher prices. If a .90 needs 10 ounces of regular glow fuel to fly for 6 minutes, and the gas powered version only needs 3 ounces, but the engine costs $400 dollars, you will need to fly it a hell of a lot to realize any kind of saving, if you ever get to that point before you wear the engine out. Because you are still using gasoline, you will still have the cooling issues, as you know gasoline has a lot higher BTU output than alcohol, but alcohol runs cooler and if you run more of it you start to approach the same power output. Especially if you have a jug of nitro handy. Glow fuel is safer to handle and have around with the way we nonchalantly carry our fuel in our flight boxes. This all is really not new, but like I said, there is a reason we have been doing things the same way ever since Arden invented the glow plug. If you really wanted to go this route, developing an easy to install and easy to adjust after market spark ignition system is a better, less expensive way to go. I remember seeing Don Hutchinson's converted to ignition Magnum .40 years ago, and it was really impressive, and not too difficult to make up. It was clearly more powerful than the best running Orwick or Super Cyclone that was there. Don really cleaned up with that combo, and it was the reason why the rule banning converted engines was put into PAMPA OTS.
Type at you later,
Dan McEntee