Puffin - work in progress

[Occupant]

Had the idea of crossing a jet fighter with a Submarine and started workin on this. The shape and desired abilities made me think of a Puffin hence the name.

[redboat219]

I presume the front dive planes are independently controlled for pitch/roll. How about for yaw?

[Occupant]

Yaw is a rudder ball in the tail shroud

[neitosub]

Love it, looks awesome

[Occupant]

Still a work in progress, played with a few iterations of ballast system. I keep trying to make things harder than they need to be (Y?). Initially wanted everything in the wet except the receiver and ESC's. Have come full circle to where only the drive motor and servo's are in the wet so a lot of the internals are changing. In the mean time getting used to resin printing - first up the canopy. Check out the before and after polishing and sealing for clarity. next up resin printing the WTC - its an odd shape to do and needs to accommodate threaded inserts. as i build this keep seeing things to fix to make it easier to print, assemble, etc...

[Occupant]

More progress, added hardware and magnetic washers (act as latch) for the canopy access hatch to the fin servos.



Also soldered up extensions and potted in wiring thru WTC for drive motor and rudder servo.

[Occupant]

More Progress, gave up on trying to build a ship in a bottle with the electronics and built a sled for all the electronics to mount on and slide in, MUCH easier.

[Subculture]

That peristaltic pump looks very similar to one I had a play with. If it is the same design, then the rollers have gears moulded in with a planetary arrangement and a small plastic gear on the motor shaft which is a simple interference/press fit. I found that the motor shaft gear loosened quite quickly when using the pump, which made it useless and would advise you swap it out with a brass item that is either a press fit or loctited onto the shaft.

[Occupant]

It's probably the same type unit. How much time did you have on it when this began happening? I could see it slowly egging out the hole in the drive gear. As for fixes yeah loctite or gap filling CA might work. A more radical solution would be to mold the gear on the shaft, then pull the gear, rough up the shaft and cast in place the gear in resin

[Subculture]

Very short- just testing, probably less than a couple of minutes of use. When I suggested Loctite I meant with a metal gear. The plastic gear is a poor choice for this type of pump.I think the pump will work fine with a change of pinion to metal.