Bruno Ogorelec wrote:Larry, thank you again for this wonderful opportunity to try to make the history books. I'll take good care of your baby.
All right, Bruno, here are the things I know that should [might] make startup a breeze:
What you need is a propane supply that can be funneled down to a 1/8-inch or smaller hose, and a compressed air supply with a shutoff valve and a regulator with a range of, say, 0-30 PSIG. The trick will be almost entirely finding the air pressure that's just right.
My starting rig has a push-button valve and about 6 ft [2 m] of 3/16-inch [4-5 mm] ID rubber hose with a standard screw-on tire fitting on the end. That's a pretty draggy system, and Mike can probably provide something easier-flowing than that, which means you won't need as much pressure. The starting air tube is 1/4-inch OD, so you need to terminate with a small hose that fits snugly enough to stay on that pipe while you're applying air, but that can be wiggled off the pipe quickly once the engine starts. On the Elektra II I had to have 30 PSI on the regulator. I think you should start with about half that, because of probable lower resistance in the outfit. The right amount of air should excite the engine into a soft but definite 'howl' when you apply it. The easiest mistake to get into is trying to force too much air.
The best starting technique I've found is: Start the spark, start the air, then gradually open up the propane until it roars, and then add just a little more. Shut off the air - if it sustains, the power will drop noticeably and you can crank in a little more fuel yet. Cut the spark and disconnect the air hose and spark wires.
If all you get is bangs and pops, you probably don't have enough air pressure/flow. If you get roars but it doesn't sustain, or you get 'blowtorch' running, you probably have too much. Once it starts and is running properly, you can try throttling up and down with fuel adjustment, of course.
That should be about all there is to it.