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[Peter Mealing]

I think I buried this too deep in the post on cooling simulation that I posted a few days ago!

Grateful for any help on this, I'm stalled.

Many thanks.

A few questions on the 1:12 Tamar if I can please.

I'm still waiting for my plans, I have the RNLI plans but not helpful in what I am trying to start on.

1. How much of a 'gap' should there be between the edge of the propeller blade and the bottom of the hull in the well?

2. What is the distance from the transom to the rear face of the 10 mm tube that retains the boat on the slip? The 4 x plastic parts if used at the length provided indicate it is right on the transom. Seems wrong to me!

3. What please is the distance from the transom on the axis of the shaft to the end of the M4 propeller shaft at the propeller?

4. The angle of the shafts where they go through the hull is I think critical! Using the Speedline shafts what please is the distance from the bottom of the 4 mm shaft at its end to the inner hull when measured vertically?

Grateful for any advice and any 'pointers' appreciated.

Stuck until I can get these dimensions!

Peter. 
 
 
 

[flundle]

Peter, did you see the response to this in the cooling thread?  Brilliant reply.
On the cooling water aspect it still needs to 'dribble out' even when the boat is stationary so you can't use prop-wash or the high pressure area over the props then.  Try a windscreen washer pump with a resistor in the line to drop the voltage to around 2.  It pulls nothing by way of amps and just leave it running.  When the boat moves and props start up, then the HP area can be exploited and the water will come out in almost direct proportion to the RPM.

I have just bought a 10cell 13000mA battery for the Severn and it will run the out runners you have for ages, even going fast!  (Actually the Severn uses Emax BL40 30's) There is no need to worry about cooling the motors.  After an hour of batting around they are only warm, they are very efficient. Cooling an outrunner though?  Mmmmmmm, have to think about that.

[Peter Mealing]

Hi Flundle,

Thank's for your reply.

I'm still a little surprised that no one offered (other than Chris J and he now has, bless him) to help me with the dimentional problems that I have still waiting for the plans and the CD!

Only been 2 months now!

All true what you say about the cooling water being apparent all of the time, even when stationary.

I have done very, very little indeed in view of the above but 'salting away' all of the information for hopefully when I can get started.

I'll get back to you once the outstanding items/parts arrive!

Peter.

[flundle]

Emailed the drawings and sent the CD today.