Hope everyone had a nice Labor Day weekend!
I machined the metal trunnions along with the seal for the trunnion bearings on the real thing. Simple turning operation. The pin size was .147" and I had to deepen the holes on the gun housings to give more meat in the junction. I made the pin’s depth is just about .200". I machined the first set using a collett for the 1/4" aluminum stock. The collett did not have a thru-hole, so I had to cut the stock fairly short so it wouldn’t extend too far out of the collett. I machined the trunnion pin diamter first and the inner surface of the seal. I then mounted the pin in a three-jaw chuck and finished the outside of the seal face. He I’m test fitting the gun frame onto the pin. My little Taig Lathe is in need of a new motor. The lathe is at least 30 years olds and the motor’s bearing are shot. There is about 1/4" end play and it’s vibrating like crazy. It’s amazing that it’s not destroying the cut quality, since the whole machine is vibrating together so the cutter and the stock are also vibrating together. It’s just very annoying. I can get a new motor from them for about $160.00.
I tried the finished part on the gun in the mount.
There are screws around the seals perimeter, but I’m not going that far.
Here are the four trunnion pins/seals. The two with the holes will accept the manual firing mechanism that feeds through the trunnion center so the gun can elevate without disturbing the mechanism. The manual firing mechanism is quite complex due to the interrupt system that prevents firing the gun when it’s pointing at any part of the ship. The gun is only firing mechanically when the entire firing system is out of commission. Normally the firing is electrical and remotely activated from the secondary plotting rooms.
I finished the metal hydraulic tubing on the guns. I removed the one I did last week. It was not the accurate and needed replacement. I also finished opening up the bore for insertion of the gun barrels and the cylindrical loading tray. The hand levers are breaking off due to all the pushing and shoving I’ve had to do to fit the guns. I will replace with metal.
I need to design more parts before I can go further.