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[PJ]

Can anyone suggest a way to simulate the exhaust cooling water coming  form the engines. Can do it with a pump but that just provides a constant stream of water. What I'm after is a pulsed stream of water. Any ideas suggestions?

Thanks

[CJ]

If on a pump can you not just "pulse" the voltage to what you require ?

Even a simple timer relay would give you a few options with and "on" and "off" time ?
CJ

[6705russell]

I used a pulse output unit from Maplins, you can set the time delay between each pulse so it simulates a bilge pump quite good..

Russ

[boneash]

Hi
On a 'real' boat marine engine there is a continuously running pump, the pulse of the water in the exhaust is probably due to the volume of space in the 'water lock'.
 http://www.vetus-shop.com/vetus-waterlock-muffler-nlp75-75mm-p-595.htm

lThis is not just a silencer but a place where the water can be collected when the engine stops to prevent it running back to the cylinder head.
A small container with an output higher than the input should be able to replicate the pulsing effect.

good luck

[Rottweiler]

Russ,
is this the item you meant?

 http://www.maplin.co.uk/motor-speed-regulation-unit-9312?utm_source=maplin&utm_medium=ebook&utm_content=catalogue_2011_2012&utm_campaign=WC76H
Cheers,
Mick

[6705russell]

No not that one Mick,  I will have a look for a link....

Russ

[PJ]

Wow - Great responce and quick. Thanks for the ideas

[6705russell]

For some reason I can't copy the link, the unit is a Mk111 Adjustable timer with relay output Maplin order code -VT27E

Russ

[PJ]

Look like I could use it to generate a flashing ligt as well!

Thanks Guys

Phil

[Rottweiler]

Thanks Russ, will go have a looksee.
Mick F

[gribeauval]

For some reason I can't copy the link, the unit is a Mk111 Adjustable timer with relay output Maplin order code -VT27E

Russ

You mean this link Russ !!

                                                   http://www.maplin.co.uk/mk111-adjustable-timer-with-relay-output-25224

[Rottweiler]

Hi Mike,
yeh thats the one I just looked at,seems good and cheap too!
Mick F

[roycv]

I used to run a copy model of Streamlinia and she was steam powered.  The water pick up for the boiler was a small "scoop" aft of the propeller.  There was a water outlet an inch or so above the waterline.  When I converted to electric I just connected the inlet to the outlet with  neoprene tubing to avoid removing anything.
This surprisingly gives a slightly intermittent water flow.  Might suit and has no working parts.
regards Roy