blank

  Really? You ask this question, with a name like Motorman??  All you need is a spark plug and electricity! You have never seen anyone that has had trouble with their vintage ignition engine, take the spark plug out, put a glow plug in and go fly?? One of the reasons to use the shorter stroke engines like the Madewell .49 and a few others. If you are not aware, the engine will run hotter on gasoline, that is another reason why guys who run sparkers either use regular glow fuel, or lantern fuel instead of gasoline. This is Engine 101.
    All it would take to get an LA.46 to run on gasoline is something to time the spark and electricity. OS has played with a gasoline glow plug for years but you never see them so it must not work very well. There is a reason we have been doing things the same way since Arden invented the glow plug back in the mid 1940s!!
  Type at you later,
    Dan McEntee

  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

yes you can run a glow emgine on gas or petrol as i know it but you wili get only 30percent of the r p m and 50 percent more heat my initial experements  showd up it can be done so i put it on the back burner for now it is doable but it will take a few years to make it reliable  roy cherry   

Looks like the answer to the high price fuels we now use.

You may be right, I haven't looked at the rulebook for a while. I'm still under impression that such closed cirquit controls are allowed only with electric power. L

I am pretty sure that the F2B rules removed the restrictions several years ago on IC engines to have some sort of active power control as allowed with electrics.  The restriction on IC engines was introduced when the F2B rules allowed electric motors and was intentionally written to restrict IC engines in favor of electrics.

Keith