German Type 212A 3D Print Build

[rwtdiver]

Today I found sometime to do a little more on my 212 Boat.







I cut and threaded a 5mm brass rod and mounted the prop. And then I really got lucky (and this dose not happen very often) and the shaft lined up perfectly to the motor shaft. At that point I installed a stainless steel 5mm universal joint and it works great!

Tomorrow I will start in on the control surface leakages, and as far as I can see they will need a little bending here and there, and with magnetic couplers we will have the control surfaces working great as well.

Rob
"Firemen can stand the heat."

[biggsgolf]

Looking good Rob! Glad you found some time, I hope your wife is doing well.
Bruce

[rwtdiver]

Looking good Rob! Glad you found some time, I hope your wife is doing well.
Bruce

Thank you Bruce!

Very kind of you to ask about my wife. We are coping, and we for sure will get through it all! :-)

Rob
"Firemen can stand the heat."

[rwtdiver]

Here it is 1:30 AM in the morning and I think I have just finished my 212, except for trimming and the finish work.

To

I lined up the control surfaces in order to be sure that they were centered as close as possible. I then locked the control rods to the linkages using wheel collars so I would have a way to adjust the linkages if they needed it.

This boat will be in the pool tomorrow morning for the cylinder leak testing and then onto the trim work! If all goes well I will do a couple of runs around the pool! I will try and get some video of the run.

Rob
"Firemen can stand the heat."

[Das Boot]

Today I found sometime to do a little more on my 212 Boat.







I cut and threaded a 5mm brass rod and mounted the prop. And then I really got lucky (and this dose not happen very often) and the shaft lined up perfectly to the motor shaft. At that point I installed a stainless steel 5mm universal joint and it works great!

Tomorrow I will start in on the control surface leakages, and as far as I can see they will need a little bending here and there, and with magnetic couplers we will have the control surfaces working great as well.

Rob
"Firemen can stand the heat."

I want to see this boat run.

[He Who Shall Not Be Named]

I want to see this boat run.

Me too. Go get 'em, Ron!

David

[rwtdiver]

Before I installed the 300 series EasyDriver cylinder into the boat, I spent some time doing leak test on the cylinder.



I ran into a substantial leak problem around the cylinder adaptor to the End cap. I did find a piece or chip out on the end cap adaptor. I cleaned it up with some denatured alcohol and applied some silicone on the chip out. Hopefully after the silicone has had time to cure out this will solve the issue.

If that does not solve the problem, I may just permanently install the back endcap.



I do not need these two servos that are mounted in the rear of cylinder for the German 212 A Boat. Therefore, I can silicone this end cap in and solve the problem. much easier than have to box it up and send it back for proper repair or replacement.

Ounce I have the cylinder issue secured I will get back to the trim out and actual trial run of my 212.

Rob
"Firemen can stand the heat."

[Albacore 569]

Looks like this 212 A uses a brushless motor in the water ?

[rwtdiver]

Looks like this 212 A uses a brushless motor in the water ?

Hi Steven,

This is the series 300 Easy Driver, and it is one of the newer models with the brushless motors mounted to the outside of the end cap. The older cylinders had the motors on the inside of the cylinder. I have a couple of othe boats with the same design, and so far, I have not had any problems with the brushless motors in the wet.

Rob
"Firemen can stand the heat."

[Das Boot]

I would love to see one of your boats in the water, at least one time.

[Albacore 569]

Hi Steven,

This is the series 300 Easy Driver, and it is one of the newer models with the brushless motors mounted to the outside of the end cap. The older cylinders had the motors on the inside of the cylinder. I have a couple of othe boats with the same design, and so far, I have not had any problems with the brushless motors in the wet.

Rob
"Firemen can stand the heat."

I'm sure they are very reliable. I was thinking of the extra volume in the dry space it now it frees up. Thank you.

[rwtdiver]

I would love to see one of your boats in the water, at least one time.

OK Sherlock,

HMS Holland Trial Run (youtube.com)

Alfa Submarine Run (youtube.com)

Russian Borei Submarine (youtube.com)

Nautilus Submarine (youtube.com)

IMG 3489 (youtube.com)

IMG 2202 (youtube.com)

The HL Hunley! The 1st Submarine To Ever Sink a US Warship! (youtube.com)

I tossed this last one for good measure!

Tri-Copter Test (youtube.com)

And If that's not enough YouTubes, here is my site you can go over....

(6) Robert Taylor - YouTube

Rob
"Firemen can stand the heat."


To answer Steven,

It does save a lot of space when th motor can be run in the wet. And you don't have run a shaft seal. although you still have the wiring.

Rob
"Firemen can stand the heat."

[RCSubGuy]

I would love to see one of your boats in the water, at least one time.

Mr. Sunshine is making friends yet again.

Rob's got a hundred pages of builds documented here on the forums. Trim your jib for a new tack and you'll go further.

[rwtdiver]

As I stated above about my leak in the cylinder,, I made the decision based on my use of this particular 212 boat and the cylinder, I would secure the stern end cap to the cylinder permanently!



I incased the inside of the end cap and around the seal. This worked and the leak issue is no more. When want to work on any part of the electronics you just pull the front end cap off and it exposes the complete inner components for any possible future repairs.

I have charged the control unit baterry as well as the transmitter batter, and we are going to do a trim test and possible 212 boat run!?:-))

Rob
"Firemen can stand the heat."

[rwtdiver]

Well today was finally the big test day.!

#1 Retest the cylinder for leaks! (Did not go well)



Repaired the problem with the bow end cap of the cylinder . The second test, I found a leak at the stern end cap. see video below.

https://youtu.be/2LckWPYtuUg

When the cylinder was sitting with no control movement and with the cylinder full of air (test hose) and under water, there was no leakage anywhere. When I applied power and operated the servos, well as you can see a leak from the seal or bushing?

As you might guess, I am a little disturbed by the problems I am having with this new cylinder!

#2 Put the boat in the water with the cylinder (and battery) BUT not turned on. STATIC only, to see how she sat in the water. Well, as you see by the photo, she went to the bottom.



The 212 A sure looked good on the bottom! :-)) I got the boat out and made some miner adjustments to the amount of weights forward and aft, and there location in the boat.



I removed some weight from the stern and the bow, and tried it again.




To me and for my running, the 212 is sitting great in the water. Do some detail work on the sail, slap on a hull paint job, do some (very little weathering) and the 212 A boat it's self is ready for the water. But, without an operational cylinder....

Rob
"Firemen can stand the heat."