Model Boat Mayhem - Forum

Dry Dock / Shipyard: Builds & Questions => Pleasure boats, Sports, Race, Power and Leisure Boats: => Topic started by: Patrick Henry on April 27, 2010, 04:04:20 PM

Title: Water cooling inlet pipe position?
Post by: Patrick Henry on April 27, 2010, 04:04:20 PM
Where's the best place to put the watercooling inlet pipe guys...it states in the destructions that it goes on the port side, but where? Between the prop and the rudder and offset to port? The rudder will be cut down some, by the way...



Ta...


Rich
Title: Re: Water cooling inlet pipe position?
Post by: Bill D203 on April 27, 2010, 06:46:11 PM
Hi Rich
I put mine in between the prop and the rudder in line. However you don't seem to have alot of room. Have fun!!
Title: Re: Water cooling inlet pipe position?
Post by: Patrick Henry on April 27, 2010, 07:12:31 PM
Mine is now off to one side and angled slightly towards the propwash....fingers crossed Bill.
Title: Re: Water cooling inlet pipe position?
Post by: tobyker on April 27, 2010, 08:23:57 PM
The most elegant one I've ever seen was in a hollow skeg off which the rudder was hinged.
Title: Re: Water cooling inlet pipe position?
Post by: Patrick Henry on April 27, 2010, 08:26:00 PM
I guess that would have been on a transom mounted rudder? Mine is a standard submerged set up....
Title: Re: Water cooling inlet pipe position?
Post by: BJ on April 27, 2010, 08:40:35 PM
I guess that would have been on a transom mounted rudder? Mine is a standard submerged set up....
You could always use the pickup the the FSRV boats use see http://www.prestwich.ndirect.co.uk/hdwraccs.htm (http://www.prestwich.ndirect.co.uk/hdwraccs.htm) item GA1A virtually above your prop
Title: Re: Water cooling inlet pipe position?
Post by: pompebled on April 29, 2010, 07:18:16 PM
Here's a variation on the theme:
(http://www.modelbouwforum.nl/forums/members/pompebled-albums-arowana-picture28983-drukloos.jpg)
A pressureless system; the inlet facing forward and the outlet facing towards the transom, creating sucktion.
Position the inlet where the propwash hits the bottom and the outlet away from the wash.

Keep the tubing inside the hull as low as possible and, once the tubes have filled, the flow will continue even at half throttle or less (but who would want that...).

Her's the lay-out inside the hull:
(http://www.modelbouwforum.nl/forums/members/pompebled-albums-arowana-picture28982-en-uitlaat.jpg)

Regards, Jan.
Title: Re: Water cooling inlet pipe position?
Post by: Patrick Henry on April 29, 2010, 07:33:56 PM
That's a good idea Jan...I like that.

Cheers...
Title: Re: Water cooling inlet pipe position?
Post by: w3bby on May 01, 2010, 03:35:01 PM
I use a flush inlet as above but prefer to have the outlet on the side or deck so I can see that the cooling is working.
Title: Re: Water cooling inlet pipe position?
Post by: andyn on May 01, 2010, 03:58:08 PM
Here's the setup I use on my multi, copper tube protrudes just below the bottom of the hull, note it isn't filed flat as it doesn't pick up as much water. The tube bends round inside the hull right the way up to the engine mount where a very short piece of silicon tube connects it to the engine, then on the other side it goes straight out the boat. Despite the fact the tube is only 3/32" inside diameter water absolutely p***** through it.

(http://i288.photobucket.com/albums/ll184/andyn_01/DSCN3847.jpg)
(http://i288.photobucket.com/albums/ll184/andyn_01/DSCN3848.jpg)
Title: Re: Water cooling inlet pipe position?
Post by: Patrick Henry on May 01, 2010, 05:35:36 PM
Off topic slightly, but how's Mervyn..no, Martin..no, Mary.. no, that yellow submersible of yours Andy?
Title: Re: Water cooling inlet pipe position?
Post by: andyn on May 01, 2010, 07:04:27 PM
Just waiting on some money to buy Melvin some new seals and a failsafe :-))
Title: Re: Water cooling inlet pipe position?
Post by: pompebled on May 05, 2010, 06:54:46 PM
I use a flush inlet as above but prefer to have the outlet on the side or deck so I can see that the cooling is working.

Now that is a matter of faith; I knw his system works, so I don't need to see the outlet.

Next to that, the point was to have a pressureless cooling loop, that doesn't induce drag...

Regards, Jan.