Hybrid's Decided it doesnt like working

spanerman · Tue Sep 11, 2007 5:22 am

Hi, yesterday i was firing the hybrid at 2x mixes and 3x, i have shot at 4x before but not yesterday. Today i loaded up the car with the cannon and accesories and made the trip to my fireing site, set up the cannon as usual, put 21.5 psi of propane in the guage..injected it, added 3 bar of air, armed the cannon then retreated............i pushed the button....NOTHING, i ventet the chamber and repeated.......nothing i tried this 3 times with no avail...the only thing ive done since yesterdays firing is reposistion the ignition box..which meant i had to disconnect the spark box from the spark plug....and i am getting a spark.....HELP this is anoying

i have a meter volume of 40ml and a chamber voule of 308ml....so im 99% percent sure thats right...

could someone go through the firing procedure i should use in some detail...

best regards Sam

Fnord · Tue Sep 11, 2007 6:37 am

Well, if you know the fuel mixture is right then the only other thing that could go wrong would be the ignition.
Maybe a rough ride in the car has jolted something out of place inside the project box. Seeing how the wires are taped together, this is fairly likely.
When you tear it down, take off the tape and add some solder or wirenuts. You'll thank yourself in the future.

SpudBlaster15 · Tue Sep 11, 2007 11:27 am

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spanerman · Tue Sep 11, 2007 1:20 pm

so what do ypu sujest i do to combat that? and the wires are in terminal blocks just taped to the board

SpudBlaster15 · Tue Sep 11, 2007 7:04 pm

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noname · Tue Sep 11, 2007 8:08 pm

Now where the hell did I say that? Yes, I told him to try to cut down on meter volume, but that was before I knew you had designed the meter for 4x mixtures. He had it firing fine, with the exact same configuration. Calling me an idiot for suggesting something I didn't suggest is the same as calling him an idiot, because he did it all by himself.

Pete Zaria · Tue Sep 11, 2007 8:16 pm

Leak test your meter and chamber underwater. A leak would explain why the fuel/air mixture is off and won't ignite.

Peace,
Pete Zaria.

SpudBlaster15 · Tue Sep 11, 2007 8:25 pm

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noname · Tue Sep 11, 2007 9:10 pm

Did he cut down on meter volume? I have no idea.
Did the gun work anyway? Yes.
I changed nothing about his gun. Yet now it doesn't work, so of course, the blame gets passed off on me.

spanerman · Wed Sep 12, 2007 1:55 am

I can recal someone sujesting cutting down on meter volume...i will change it back but the meter volume was rather large.....and iff i recal somewhere around 70ml....is this acceptable with a 308ml chamber?

spanerman · Wed Sep 12, 2007 7:35 am

ok, changed meter volume back... its in the original configuration....and its exactly 70ml....what pressure do you guys work out my meter presure should be for a 4x/5x mix? (dont have a go at me i have done the math im just checking)

here is a photo to refresh your memory(yes that is a new stand...

SpudBlaster15 · Wed Sep 12, 2007 8:04 pm

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spanerman · Thu Sep 13, 2007 2:23 am

hmm same hear...seems anoyinginly low.....im going to use hex nipple in my meter over pipe nipple should cut down the volume quite abit....whats your chamber/meter volumes sb15?

SpudBlaster15 · Thu Sep 13, 2007 10:57 pm

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spanerman · Fri Sep 14, 2007 1:39 am

yeah, im going to buy a glycerine filled guage:) and maybe a regulator...