After searching the internet and not finding what I wanted; I built this cannon for the tank I am putting together. Has anyone seen anything like this? this is the first prototype that I put together and I was wondering about upgrades. more videos once I build some ammo.[/youtube]
Posted: Tue May 31, 2011 5:09 am
by Doctore
Looks good
What about range?And if you can post pictures of your tank when you finish it.
Posted: Tue May 31, 2011 8:27 am
by Labtecpower
[youtube][/youtube]
Nice I like the tank style 360 degree travel.
I see you use propane as propellant. Do you meter it ?
Also, according to other members, adding a chamber fan will increase performance noticeably. It will probably have trouble with your loading system however.
Posted: Tue May 31, 2011 1:11 pm
by wyz2285
I have a friend that's buiding the same thing but he uses hydrogen and automatic reload. Any way very nice
Posted: Tue May 31, 2011 1:19 pm
by cammyd32
That is painfully epic. I look forward too seeing it when it is finished.
Posted: Tue May 31, 2011 1:58 pm
by pipeboyswe
Wow that looks awesome! What are the specs of the gun? barrel length etc, etc.
Posted: Tue May 31, 2011 6:52 pm
by Runningman5
the barrel is a 2inch piece that's 44inches long. it's volume is about 1-1 with the combustion chamber. I have heard that the ideal ratio is 1.5-1, but I have been getting more than enough power with the current barrel. just the other day I launched a lemon at least 180yds uphill (not entirely sure cause I couldn't see the landing point).
the Propane has a one-way valve attached going into the combustion chamber, had to build it myself. for the breach I used a threaded end cap and cut off about half of the threads and ground down the rest. the whole door assembly is something I welded up. the ignitor is a rewired stun gun (fairly easy to do, but make sure everything is properly insulated!!!)
Pics and more vids soon
Posted: Tue May 31, 2011 8:50 pm
by Runningman5
slideshow of pics showing new ammo:
Vids of new ammo:
and
Posted: Wed Jun 01, 2011 9:28 am
by warhead052
If thats an airsoft tank, I would suggest NOT using that ammo. Just for safety reasons. Just try a paper towel wadding, then bbs and then more paper towels. Then fire away.
Posted: Wed Jun 01, 2011 9:49 am
by cammyd32
That is a point, if you hit someone with that not only will it get them out, it will knock them out.
Posted: Wed Jun 01, 2011 9:52 am
by warhead052
Since it goes through plywood, it will kill them. Unless its a 2liter bottle airburst shell, I don't think its safe to use.
Posted: Wed Jun 01, 2011 2:50 pm
by Runningman5
Yeah, I kind of figured that something that could put a nice round hole in plywood is not something that I want to shoot at people. considering the power that I am getting I don't want to shoot anything at anyone with this gun. I may try making a lower power version; with a 3inch combustion chamber or something. in the meantime I will just attach one of my airsoft rifles, that was the original idea anyway. Definitely going to keep the cannon for messing around though.
Posted: Wed Jun 01, 2011 2:59 pm
by warhead052
Well, using a nerf football or something would work, but be sure to tell everyone to watch out for it. Call a 30 foot radius "kill" zone or something for the foot ball.
Posted: Wed Jun 01, 2011 5:56 pm
by Runningman5
for target practice I marked out a 15ft circle around the plywood, it was a pretty big circle. from 150ft I was able to get 2/3 shots inside the circle, so 30ft might be a bit too much. I am hesitant to try nerf footballs because of the price, anyone know where I could buy them in bulk? otherwise they're like $8 each
I like the tank style 360 degree travel.