KRICK UBOOT DIVING PROCESS

Hi all- newbie on your forum - thanks for your help in advance

how does the pump system work on this boat - I understand how to dive but how do you go back to surface since the water tank is still full of water and there is no way to empty the tank with the pump...

secondly which kind of switch would you use to operate this pump (12v) from your radio
thanks
jm

Hi Ksimodo,

There is quite a lot on here on the Krick variants. e.g:

https://www.theassociationofmodelsubmariners.com/t1239-krick-type-v11-u-boat?highlight=Krick

For more info type Krick into the search box.

From:

https://www.cornwallmodelboats.co.uk/acatalog/krick_uboat.html

It looks as if the current model has a ballast tank to bring the sub down to an "awash" condition and then it is a dynamic diver.

You need to give more info about your 12v switch. Is this to control a ballast tank pump?

David

Thanks for your answer David

I think you're ok w the diving process, but I do not understand how the ship can get up out of the water, since the pump is not supposed to empty the water tank....(it is one way ) -It is a 12 v pump and I need to be able to operate it with my radio ....
the switch is to operate the pump
reagrds

jm

KSimodo,

the ballast tank will not cause the submarine to sink, it is only large enough to get the sub down to "decks awash". after that, to make it sink, you will have to drive it with the diving planes pointing down. to surface, you will then drive the submarine with the diving planes pointing up, until the snorkel for the ballast tank is above the surface, at which point the water will be able to be pumped out of the ballast tank. if you simply stop the submarine, it will slowly rise back to the surface, but it make take a few minutes for it to get to a point where the snorkel is above water.

if you run the pump while the snorkel is below the surface, you will simply be circulating water through the ballast tank, causing no change in the mass of the sub.

Hi Tsenecal

many thanks for your answer - makes my problem clearer - So let's finish the explanation - If I have to empty the ballast, the pump has to be able to work in both direction in and out ?? Or it will empty because of gravity ?
regards

jm

I would need to see pictures of the pump before i can say what it is able to do. I have seen both water and air pumps that will move fluids in both directions, and i have seen pumps that will only move fluids in one direction, regardless of which way the pump is actually turning.

Hi

This look's like the old HFM type 7.

On the prototype a small MFA fuel pump was used, I run my boat 7.2 volts,

The ballast tank was in two parts top and bottom and we drilled a small hole into the front of the top half as low as pos, this was so that when we went too empty the tank most of the water would come out, we could not put the drain outlet into the bottom of the tank as this sat on top of the water tight box, to help get all the air out we placed a small plastic pipe into the top of the ballast tank and out of the tower one thing that we found on the prototype was that at times not all the air come out so on my boat I run a small plastic pipe from the rear of the tank along the top edge of the tank and back into the bottom part of the tank that goes into the tower,

Back in 2000 along with Alf Blake who made a cylinder out of an old rain water down pipe along with a internal ballast tank gave the boat a new turn of life.

If I can be of any help then please ask

All the best

Fred

Sorry forgot to ask where are you located. I am in Peacehaven.

Fred

hi I am willie and I have a Krick. u boat fitted with a 12volt water pump to run it i use a 12volt forward and reverse speed controller as the pump works in boath directions

willte wrote:hi I am willie and I have a Krick. u boat fitted with a 12volt water  pump  to run it i  use a 12volt  forward and reverse speed controller as the pump works in boath directions

Hi willte

Should have checked this by simply inverting the connexions but I'm afraid the one pump I have just works in one direction - I'm gonna check
But maybe I'm not going to need it because I cannot get this f..... sub to dive ;-)))
thanks your reply anyway
jm

KSIMODO wrote:

willte wrote:hi I am willie and I have a Krick. u boat fitted with a 12volt water  pump  to run it i  use a 12volt  forward and reverse speed controller as the pump works in boath directions

Hi willte

Should have checked this by simply inverting the connexions but I'm afraid the one pump I have just works in one direction - I'm gonna check
But  maybe I'm  not going to need it  because I cannot get this f..... sub to dive ;-)))
thanks your reply anyway
jm
[/

did the pump come with the kit the pumps are the same as car wind screen pumps

halfords sells them

Quite a long and (hopefully!) useful thread on the various screen wash pumps:

https://www.theassociationofmodelsubmariners.com/t286p25-pumps-geared-variety?highlight=red+pumps

David