hydrogen powered mini

[alwinovich]

i made this little mini in about 7 hours
it uses a glue gun as housing
and the glue-heating chamber as combustion chamber
it has a detatchable barrel, made from the detatchable glue nozzle
it uses a flyback transformer running on 5 watt for ignition

sorry for any bad grammar, i am dutch and 13 years old

[youtube][/youtube]
just some test firing

[VH_man]

very professional looking mini.

Hows the power with H2?

[alwinovich]

for short barrel designs it's i think the highest of all gasses
it can shoot a q-tip through 2 sheets of paper(i consider that high)

[VH_man]

Just got time to watch the videos.....

its pretty dang loud for a mini........ I like it.

For a new member, you seem to have some well-refined concepts and ideas. I want more cannons from you........

[ALIHISGREAT]

its pretty cool how you do your own electrolysis and i like the look of the gun too, and the spark isn't bad either

[jackssmirkingrevenge]

Impressive, I like how you managed to fit it the glue gun case, you really out to use a piezo ignitor to make it portable. What sort of penetration do you get with "serious" projectiles like BBs or airgun pellets?

Welcome to the forum

[alwinovich]

i haven't tried any "serious" projectiles, because at the moment i don't have a fitting barrel
i'll work on it

i know the power of pure H2 and O2 mixed in the good proportion, so i used the flyback for remote firing
but now it's tested maybe i can put a piezo in it, but for multiple shots, i would have to have a H2-O2 storage tank

[alwinovich]

ok so i made a new, longer barrel, fixed some chamber air leaks
and ordered some .22 airgun pellets
i measured the barrel at roughly 5.7 milimeters
so they should fit

i will upload some dmg pics when they arrive

[inonickname]

I like it, fairly neat and tidy. Watch out with hydrogen as it has a far higher burn rate than propane so it's more like a sudden shock to the container. Looks like you have it under control though.

Welcome to spudfiles, you should check out my mini hybrid build. I might build an electrolysis unit and have hydrogen as a power source. Good luck

[SpudFarm]

pretty cool little plinker you have got there. i have to say that i am impressed

you should be able to make a real hybrid in a very short time

[VH_man]

could you post details about your Electrolysis machine?
I kinda want to do this.......

[alwinovich]

about the cell

it is a electrolyser ripped out of a (€40)estes hydrogen rocket kit
housed in a jam jar
powered by a (€50)10 amp battery charger
where in tap water it draws about 5 amps where it generates 2 cc/s, i add potassium hydroxide(€14/kg) or sodium hydroxide(lye,€4/kg) if i want more amps=faster production

if any1 wants more details/tutorial about the gun/electrolyser/flyback transformer, just ask

[iemand]

if any1 wants more details/tutorial about the gun/electrolyser/flyback transformer, just ask

Ok, then give me some details on your flyback ignition.
What kind of flyback did you use, and what else?
Maybe any schematics...

Nice gun, I'd say: scale it up, longer barrel, scope maybe?

[roboman]

Not bad! It looks really nice, and seems to work pretty well.

BTW: Your grammar isn't the worst I've seen around here...

[rp181]

iemand, there are many different ways to drive a flyback. From the look of the spark, am i right in saying its 555 driven?

Why do you disconnect the hose every time? Seems it would be more convenient to keep it attached to the syringe, and add a T to the electrolysis machine.