Barend Nieuwendijk
Username: Barend_nieuwendijk
Registered: 08-2008
Posted on Monday, June 07, 2010 - 12:09 am:
Hi David,
Sorry for the delay.
I am so busy with work (and sailing) that there is no time left.
Hereby some details:
I have invested in a powerful electric propulsion. I have experimented with the Minn Kota stuff before, but that is to light weighted for an Winkle Brig. In Holland you need power to struggle the wind in canals
So I have:
A 2,5 KW motor which is mounted underneath the WB. It is a so called POD-motor
To make that possible I closed the well (with plywood , glass math and epoxy)
The water problem in the cockpit I solved with two holes (I can not find the right word for it)
The motor is very powerful (equivalent to 6 – 8 horse power)
The batteries are 4 x 6V heavy traction AGM (the are totally closed and can be held upside down), 225 Ah, weight ± 120 kg. I used the space where the portapotti used to be. The fit in exactly.
So I have 5400 watt to spare.
The time to fern differs with the speed: see the table. We measured this with a GPS. Its the average from no wind tot force 4 on the bow
speed
knts. current sailing time in hrs.
0,56 .... 3,00.... 60,00
1,11 .... 4,00.... 45,00
1,67 .... 8,00.... 22,50
2,22 .... 12,00.... 15,00
2,78 .... 20,00.... 9,00
3,33 .... 30,00.... 6,00
3,89 .... 40,00.... 4,50
4,44 .... 70,00.... 2,57
5 ..... 90,00.... 2,00
(from the 225 Ah you can use 80 % without harming the batteries)
I think I can get better performance because the propeller is not the right one. I need a bigger one with less pitch.
So far so good.
Next time I tell you more about my experiences, my studies on batteries, battery loaders, and so on.