Sunday, March 27, 2016

[Electric Boats] Prop Wash [1 Attachment]

 
[Attachment(s) from albert682@yahoo.com [electricboats] included below]

Launched last week.  http://www.marinetraffic.com/en/ais/home/shipid:3824576/zoom:10

Sea Trials and fine tuning of systems continues until the sonar is installed properly, the autopilot is working and there is less sawing at the helm.

We have twin Ray Electric Outboards and tried them offset one foot from the hulls on the first day from the travel lift and much sawing to get to the slip.  A few days latter we constructed a different mount and placed the outboards behind each hull slightly off center towards the center of the boat.  Then we motored the track given above.

Looking for a solution to implement counter rotating props for a Ray Electric Outboard.  I haven't been able to find any actual prop data other than it is a 12 1/2" x 10" weedless propeller.  If I could find a prop of the same type but opposite rotation I could invert a controller and run the motor in reverse and everything would be good.

Otherwise we are going to try placing the motors very close together at center of the boat next to see if that reduces the sawing at the helm.

The boat ended up weighing 5400 lbs so it actually weighed less than the last survey in 2011 and we made not many efforts to reduce weight on the boat aside from emptying the water tanks.


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