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May 30, 2007, 02:45 AM
Registered User
Build Log

WATERPUMP upgrade pack for ROBBE U47


Now we have 3 version of this boat.
1)Gas propel system,many people like this becasue of realstic bubble !But we only can supply lighting gas may cause some safety problem.
2)Airpump system,it's more fast and save electric but because we used a large airbag,the air-pressre change volume inside tube,somebody claim some leak.
3)Waterpump ,we used a large high-performance waterpump and big soleniod.The system work very well,diving and floating stabilize and quickly.

Below video show a waterpump vesion which test 10 times no any leak.


VIDEO in youtube here:

Static diving&floating of U47 submarine(waterpump) (2 min 7 sec)



Underwater-1 of U47 submarine(waterpump) (2 min 36 sec)



VIDEO 3 here:

http://www.arkmodel.com/c7610/C7610-surface.wmv
















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May 30, 2007, 09:31 AM
Registered User
Excellent pictures and video!

Bill
Nov 16, 2008, 07:21 AM
Between Fear and Loathing
SubNut's Avatar
I want that!!!
Where can i get it and are their comprehensive instructions for the conversion of the Robbe U47 from dynamic to static?

P:S: Is it striking the bottom of the pool?
Last edited by SubNut; Nov 16, 2008 at 12:22 PM.
Nov 17, 2008, 03:00 AM
Irregular... need..fiber!
HorribleHarry's Avatar
Are You Working On A System For The Robbe Type XXI???
Nov 20, 2008, 07:20 AM
Registered User
Quote:
Originally Posted by HorribleHarry
Are You Working On A System For The Robbe Type XXI???
yes,we can supply any size WTC ,you can contact me.
Nov 20, 2008, 05:15 PM
Shanghai'd Expat
herrmill's Avatar
Here's Ark's sub offering:

Ark WTC

I have their new Type 39 Song which is RCABS & am quite satisfied with the performance. Will post some photos & video here & over at SP this weekend.

Chuck
Jan 11, 2010, 07:25 AM
12 year old Rc sub geek
nice wtc system you got there

can it work for other models???
Jan 11, 2010, 03:25 PM
Registered User
I always say a bladder bag and a water pump is the best and most realistic way to have static capabilities.
Jan 11, 2010, 04:12 PM
Registered User
"I always say a bladder bag and a water pump is the best and most realistic way to have static capabilities."

And this is based on how many years of experience? How many boats you've built?

First, let's discuss your definition of "realistic" and "static capabilities". To me, these terms describe what the real boat actually looks like while diving as well as the amount of (scale) time it takes to dive. I've never seen a bladder equipped boat compare to a Propel boat as far as diving realistically is concerned. The pump just takes too much time, both diving and surfacing. As a matter of fact, the only pump type boat I can think of that looks truly scale in diving and surfacing is the Marlin. This doesn't mean it's the only one that will do that, but it's the only one I can say that I've seen.

As far as "best" is concerned, you're forgetting the piston type systems.

And before anybody gets all over my case, no, I am not espousing the virtues of Propel but merely stating that the combination of the always open holes in the bottom of the tank combined with an appropriately sized vent hole just WORKS.

Skip Asay
Jan 11, 2010, 09:00 PM
Registered User
I love that sub, it's perfect.
Jan 11, 2010, 09:38 PM
Registered User
Here is a Robbe Seawolf V2 with water pump static dive.
I have the same model and made the same mod.
Its perfect.
https://www.rcgroups.com/forums/showthread.php?t=302419
Jan 14, 2010, 11:09 AM
Registered User
Quote:
Originally Posted by Skip Asay
"I always say a bladder bag and a water pump is the best and most realistic way to have static capabilities."

And this is based on how many years of experience? How many boats you've built?

Skip Asay
I have built four boats.
One is the Robbe Seawolf, with my water pump conversion.
The other three are Seaviews.
Two are Merryman gas, one is big Dave RCABS.

I will take water pump and RCABS over gas, as I have put all three in action, explored the possibilities of each ones capabilities in "looking scale" and am happy to report that yes, water pumps rule and RCABS is a very close second or tie for first....gas is my third of the three for what I want from a static sub.
Apr 15, 2014, 11:54 PM
Registered User

Robbe U47 upgrade


[QUOTE=SubNut;10951375]I want that!!!
Where can i get it and are their comprehensive instructions for the conversion of the Robbe U47 from dynamic to static? And also a water pump upgrade pack for
the Robbe were to purchase


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