Again, go to: http://www.bderc.com/ Click on Products, then Cannons / Cannon Plans. Down the page are 4-sheet plans for rotating cannons ($25 currently). Those plans represent an older phase of the design, that has seen plenty of improvements, but the basic idea is there. Plenty of people can discuss various changes since those plans were drawn, but that discussion probably won't make sense until you have them in front of you. JM
I tried rolling my own custom... ugg. Don't. Unless you have a Mech engineering degree & a mill. Don't. Either follow the standard approaches boaring out pneumatic parts/etc (look @ queensown) or buy from battlers,etc...
Got a cannon question here. Because I am working with a small ship IE. FNS Mogador. There is very little room in the hull. I have striped everything down to as small and as light as possible. The turrets will be non rotating. I am looking at having all four barrels to fire off of one accuator. Is that possible? I have not had a chance to hook up all of the parts and try a test fire. I am still missing the cannon barrels. To save on weight, I am using a lot of plastic "T" fittings and Plastic tubing. I am reworking the super structure to make it as light as possible. With the smaller battery, all of the parts I have on hand for the cannons, and adding a munitions load of 144 BB's she floats right at the water line! Am I over looking something?
& you don't have a build thread, why? You should be documenting this! Not really, because as soon as one barrel fires the pressure in the others falls to zero. You either need a lot of load balancing, or a big gun accum which you don't have room for. motors, props, radio, firecontrol, esc, rudder&servo... ?
"Not really, because as soon as one barrel fires the pressure in the others falls to zero. You either need a lot of load balancing, or a big gun accum which you don't have room for." I'm not certain that's the case Justin. IIRC, a copper fast gun accumulator is much smaller then the PVC ones used in big gun, and is able to drive triples at a very high rate of fire. They should be able to drive quads in a big gun Mogador at a lower rate of fire without too much problem. Of course, I'm not positive as I've never tried my hand at a big gun ship.
IRC cannons have multiple switches for each barrel & o-rings. I guess that wasn't the question, though. eeeh... I read, well... I'm not sure what I read. Yeah, what Mike said use a smallgun methods for your big gun boat... It'll work. Just hope you have enough room.
The CO2 tank and regulator fit nice and snug in the bow. I have enough room so that the bottle is on an angle upward. I have everything lined up on the center line. My only difficulty right now is the magizine feed to the breach.
How exactly are you arming your ship? One cannon with four barrels, two cannons with two barrels each, four cannons with one barrel each? Start a construction thread and provide some photos, so we can better understand what you have. You should be able to run multiple MPA actuators off of a single MAV poppet. That may not hold true for the lighter SMAV poppet, though. I need more information.
you really want to have one accumulator for each gun, with a check valve on the input to the accumulator.
Really Tug? I've never used expansion tanks on my single guns before, and never really had a problem with them. Even when I ran duals on the Courageous I didn't use an expansion tanks, but I had them set up for single fire. I prefer being able to choose left or right or both depending on what I was looking for. Most of the triples I have seen use a single expansion tank as well. Since you're running duals Monk, that's a set up I'd look at: Use separate servos for your guns instead of driving both stern guns off one poppet. The layout would look like left stick fires one stern gun, straight back fires the second stern gun, right stick fires your bow gun and forward activates your pump. If you pull the stern back diagonally to the left, BOTH stern guns will fire. That will allow you to choose whether you are firing duals aft or singles for whatever you desire.
I will see if I can fit that under the hood sounds good wait I dont have the Hood aw you know what I meen
So I will need an accumlator for eact turret! Another servo and two more accumlators! (I happen to have one servo and two accumlators on hand.) That sounds heavy! That may push the hull down too deep in the water.
