R/C Naval Combat

I have taken to making my own out of plastic. but in the past I have used solid rivets of the proper diameter, cut to the proper length.

if properly done you can use the hex cap under the piston to to any necessary fine adjustment on piston height.

the spring is also critical. I got my best results not using any spring (as far as rate of fire and no double fires) but it would occasionally jam.. making it useless. it does not take much of a spring, so long as the piston is mounted roughly vertical.

Rivets, screws, brass or Stainless Steel turned down, even DuBro Wheel colors. Whatever works!

I have used a stainless steel #8 wood screw that is 2 1/2" long. They have a smooth end I just cut them off where the threads start. you can get them at any hardware store. DON'T get the Zink coated ones. Make sure they are stainless steel.

quote:

---

Originally posted by t_josef


Which is better & Why for fast gun ships?

Piston interrupted or Ball bearing selector gun?

And is there a good source for detailed plans for a piston interrupter cannon? ~ That shows size/ tolerances of moving parts?

I have one purchased through a supplier for reverse engineering, but wanted plans to give to my friend the machinist.

---

The piston ones are more forgiving
if you are making your own the ball
bearing ones are easy to mess up if
not made to correct size and depth.

Just my 2 cents

quote:

---

Originally posted by t_josef

What do you use for the "selector" part of the cannon.? Is it a turned down aluminum nail? Is it a sheer pin from the slide out drawers at the hardware store, or some sort of rivet?

---

Use stainless steel screws
not galvanized steel (they will rust and jam your gun)
don't use aluminum they wear down fast hitting brass
fittings and steel balls all the time.

[:D][:D]

quote:

---

Originally posted by Bob

I have used a stainless steel #8 wood screw that is 2 1/2" long. They have a smooth end I just cut them off where the threads start. you can get them at any hardware store. DON'T get the Zink coated ones. Make sure they are stainless steel.

---

What Bob said.....[:D]

we use tinners rivets, stainless steel and no need for cutting, the only problem is where to find them. the springs are from smallparts.com., berillium copper ones.

Rarena, do you have a part number for those springs?

SPRINGS
beryllium copper,silver coated .240 od. (1 spring does 2-3 )
B-CS-53