Type 212

[MFR1964]

David,

The reason why it did happened is easy, i simply gave the torpedo 1 puff of gas, my intension was to see what happened with the expelled gas. i guess it wasn't enough to get her out of the tube.
Closing up the breech-end will return my airbubble problem so that's a no no, with building subs nothing is easy, in the end i'll tinker out the problems, you can call me grazy but i like the journey more than driving my subs.


Romel,

You asked about the balancing device of my type VII, i made some vids to show how it's working, but first the boring stuff.
How does it work?, well, instead of the gastorps my electric one's have bouyency, each torpedo has a few gram, in total i've got 5 torps onboard, 4 in the bow and 1 in the stern.
As you allready know, every weightshift will alter the balance of your boat, shooting the torps will encounter to unbalance the boat, to counteract this i've made a shifting weight which is being controlled by my level keeper.
Most work was, to calculate the right amount of lead needed to get me the right compensation with the shifting weight, to build the mechanics i took a peek inside the boat of my good friend who has made the same system, so the wheel was allready invented, it took some more effort to get it working.

One of the many tests to show how it will act in the real life, in this test it proved to be working, but the gearing wasn't low enough, so the boat started to pendel, changed the gear to a other ratio and now it working better with allmost no pendel effect.
A bonus with this system is also, that you can level your boat out when you've changed something small without retrimming the boat again.


Manfred.

[Subculture]

Did you have some sort of feedback servo mechanism on the weight, or was it just speed and direction controlled by the leveller?

[trout]

Manfred - I remember this posting. I have been following you for awhile (not in a creepy stalker kind of way). You also have the cigar tube torpedoes. It all comes together in my mind.......

[redboat219]

Too bad you can't fit something similar in your U212.

How about putting small jettisonable weights in the stern which are ejected mechanically at the moment the torpedo is launched,
a Torpedo CounterMass Ejector ( TOCOME )

This way the boat should remain balanced.

[MFR1964]

Subculture,

No feedback, just a ESC connected to the leveller, the leveller controls the balancing device, but only when the boat is dived and the torpedosystem is activated, for testing i made a manual override.

Tom,

Yep, i'm the one with the electric cigars, this build was completely covered on youtube, for now she is finished, unless i discover some features that i can add to the boat.

Romel,

TOCOME, lol, thats a good one, but i fear it will become needless difficult to add it to the 212, today i conducted some tests inside the bath, it showed she's not much off balance with loaded torps, since most of the time i'll drive without, TOCOME will be not needed, clever idea anyway.

I'll rework the vids and post the result, be patient.

[MFR1964]

The newly edited video, after rewinding the vid a few times it seems she will recover within two seconds after a launch,she was a bit higher in the water, probably because the torpedo's where not totally filled with gas.
Once the torpedo is launched she is getting deeper in the water, exactly what you could suspect when loosing some bouyency, still i have to alter some things on the boat itself and then it's off to filling and painting her.

Manfred.

[redboat219]

I noticed that the bow is deflected down at the moment the torpedo leaves the muzzle. I wonder bow down will she go? As you're testing in a tub you can see the bottom of the bow hits the bottom of the tub and the action is stopped. Need to see how she"ll behave in deeper water.

[redboat219]

Found a supplier for those gas valves;

http://m.alibaba.com/product-gs/215763779/Gas_Refilling_Valve.html

http://m.alibaba.com/product-free/133054831/airsoft_parts_airsoft_strengthen_Intake_valve.html

Maybe Mike can contact them.

[MFR1964]

Romel,

I hope to get me some nice weather to try a run at the pond, want to shoot with the boat hanging still at the scopes and some shooting while running.
I think the deflection will be less during running the boat, because the gas will be gone quick through the deck and tower.

Also made the last adjustments to the launchtubes, like i wrote before i messed up the copper rods, i wanted to place stainless steel ones, but i found me some nice carbon rods with the right diameter.





It's space age stuff, but you can hardly bent it, i needed some very rigid rods and tried this stuff, these will be the last modifications on the launchtubes, i'm allready covered by foam dust from working on the tail of the XVIIb, i still want to add some details to the boat which i've found
during the search on the web.



Manfred.

[He Who Shall Not Be Named]

My poor launchers! .... Whaaaah!

David

[MFR1964]

Getting emotional Davy?, poor launchers you write, i'll guess i've molested them in such way that the material value will be less indeed, so you are right about the poor factor.


Manfred.

[He Who Shall Not Be Named]

LOL. Keep at it, Manfred. You're taking me back to school. Good stuff!

David

[MFR1964]

I'm getting there David, i'm getting closer every day, the carbon rods even giving me a nicer slide action, you can't bent them by accident so you are assured a good sliding action every time.
There's nothing wrong with the actual design, i only messed them up by taking them apart to much, i love to tinker on other guys design, simply to see what is possible or not, and if i can add some improvements.


Manfred.

[He Who Shall Not Be Named]

I'm getting there David, i'm getting closer every day, the carbon rods even giving me a nicer slide action, you can't bent them by accident so you are assured a good sliding action every time.
There's nothing wrong with the actual design, i only messed them up by taking them apart to much, i love to tinker on other guys design, simply to see what is possible or not, and if i can add some improvements.


Manfred.

Product improvement. Who can argue with that? Good work, Manfred. Should be some war patrols come summer over there.

David

[MFR1964]

I'm now working like a madman on three projects, due to Mark i can add more details to the type VII, building on the XVIIb tail, and getting more details on the 212.



Still had to ad some things to the inside of the door, and i'm working on some things for static diplay, so it's not over yet.

When the weather stays OK i hope to do some outdoor testing with the torpedo's this weekend, have to get me some spare bottles of gas, this way i can report back with the actual range on Butane gas.


Manfred.