After testing to day, I can report that off-setting the water scoop did not cure the problem that I have with my Sea Commander wanting to “nose dive” into the water after being turned RIGHT into any choppy water at speed.

I do think that it has made the problem less than it was, but not by much!

Bob.

I have just repositioned the water scoop on my troublesome Sea Commander that likes to drop its nose down into the water when it turns RIGHT into choppy water or another boats wake.

Turning the boat LEFT into the same choppy water or another boats wake does not change the boats poise at all and since the boat is built nice and square and the rudder and water scoop were directly on the centre line, the most likely cause for this strange behaviour is that the hull is being affected by torque?

This is further confirmed by turning the rudder to the LEFT when the nose is diving under the water as this causes the boat to immediately stop diving and regain its composure.

With the water scoop now re-positioned so it is mounted as suggested by Vic Smeed all those years ago, it naturally places it on the RIGHT underside of the hull.

Maybe this will help to off-set the torque twist that may in turn be causing this boat to nose dive when turning RIGHT into choppy water?

I will cover the raw wood with some paint in the area where I have been working and get the boat back into the water to see if it has helped in any way?

Bob.

Back in my early days of r/c model boating we always run with ic engines of one sort of another (usually glow plug engines) and running a water cooling system was essential.

The height of the inlet was positioned towards the outer circumference of the arc described by the rotation of the propeller to get the most effective water pressure in the system.

In an early book written by Vic Smeed it was stated that the most effective position for the mounting of the scope was on the upward side of the propeller blades direction of turn.

To help counter-act the torque twist of the motor and prop the water scoop was always positioned to one side of the centre line.....or that's what we thought at the time !

Positioning the water scoop inlet on the side of the prop's upward direction blade would position it on the RIGHT hand side of the hull when viewed from behind.

Any thoughts about this and it's possible effect on reducing the torque twist from the motor and propeller?

Bob.