Last night i made another larry spec stinger using 2 x M5 countersunk screws welded head to head with a .2mm gap instead of the .5mm gap (.5mm gap un tested on an engine). i setup the fuel line and stinger in an adjustable fashion and commenced start up attempts once more.
so as i intended, i only slightly opened the bottle tap too allow enough flow for this small rat jet. I attempted about 3 times to get any kind of buzz out of it but not really getting any where. I could get pops bangs and growls but something was missing. I dont know why but i decided it wasnt getting enough compressed air to get it to lock in. I altered my air gun and then it literally jumped into action and ran like a champ
I have a 10min video of the entire start up attempts from this evening but i edited it down to the few moments where it jumps into life and warms up. In the video i opened the ball valve right out and then sowly eased in more gas from the bottle tap. it started to get rough at the topend and for some reason i just shut it right off. I should have tried the low range of the throttle and also turned the damn lights out
sounds extremely loud and this was my first experience of the pulses against my body. its kinda weird haha
huge thanks to Joe for the tips and enthusiasm and also thanks to larry (is Larry still about?) for the stinger design it appears to work very well and is a better solution for me than the rosscojector.