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Thanks, Mark.

I build an annular version of the M20 about a year ago. I could not get the injectors out far enough to get it to run. A couple of weeks back I fixed the issue and today I tried again. Although it runs, it's a huge pain in the ass to get going. Thrust is rather disappointing too: 11.4 pounds (origin...

Hi Mike, Just a thought but the fuel you are using is ethanol? - very hydroscopic- Dave, a mate of mine, who is well into his chemistry, can process/refine it to remove almost all the water - I can ask him what it is he does to do this ( I recall he added something to the fuel and it solidifies at ...

I was realy excited to read that article, until I saw the 100 grand price. Not quite mainstream. 100 grand will buy you a lot of nice machining tools

Lol it's a scaled version of the M500, tailpipe reinforcements and all

it doesn't look like you flared the intakes. This will limit throttle range and thus thrust. Flare them and try again. It'll run a lot harder

Easily. No moving parts to waste energy on

I'm not sure about our injector suggestion - I have never done an injector like this. I don't think you'll be able to start automatically like this. just try with a hand hold Rosscojector to see if it starts easier. Once running, switching to liquid fuel should be doable.

Ah now I see. the small version of the picture made me believe that was a sparkplug. I think that is the crux of the problem though: the motor doesn't like the injector at that point. You want a tube pointing down the intake, depending on type, 0-50% of the length. The fuel is now delivered at the w...

Open up the spark gap a bit to get the gas to properly ignite. What kind of injector are you using, and is the propane bottle full and unrestricted?

I'm still here!

When the forum is as dead as this one, any post is apreciated. Thanks for the reference!

I see. Why would we want to celebrate this exactly, Fileeraus?

What's special about june 12?

Try something like this. Bend your injector tube back 180 degrees so you can tie it to the intake with some hose clamps. are you talking about keeping the torch attachment or removing that all together and hooking the propane directly up to the injector tube? Like Tufty said, lose any restriction b...