Maiden voyage of my
Awesome.
Thank you for sharing.
Sent from my Verizon Wireless 4G LTE smartphone
-------- Original message --------
From: Bill and Ai Qiu hopen <billhopen@yahoo.com>
Date:04/12/2015 10:57 PM (GMT-05:00)
To: Rstram <rstram@aol.com>, Richard Stram <richardastram@yahoo.com>
Subject: The electric drive sail boat
We went for our maiden voyage this evening, the lake is filled to summer pool, no leaves on the trees yet, the early dogwoods just beginning to bud, so you can see the rock formations and cliffs through the woods. Mossy creeks running down the cliffs from recent rains. Fish are beginning to rise and bats are out catching bugs...spring has sprung
the electric drive does great! it will troll/cruise very gently and quietly @ 100 watts. and go as fast as I can paddle my canoe at 350 watts or so. @ 800-1000 watts its about as fast as I can jog, say 5-6mph. I ran the boat at 1600 watts but came up against the natural "hull speed" of the craft, there is a formula: square root of length of waterline (in feet) times 1.34 = max knots theoretical hull speed of displacement craft, mine is 5.75 knots. trying to go past that is a waste of energy because you are creating a wave that you can't climb over unless you start planing like a motor boat.
I took an industrial 36 volt motor and ran it on 50 volts DC....(4 wheelchair batteries) through a very efficient PWM Pulse Wave Motor Control. we went several miles and batteries went from 51 volts down to 47.5 volts. I am very satisfied. Motor controls and digital gauges are so cheap. My boat and trailer cost 280. the motor/prop/controller/reversing switch cost 250. the batteries 300. $35 to register for 3 years. so I'm in there for under $1000.
The kids loved it, they were climbing all over the boat, snuggling in the bunks, sticking their heads out of the port holes. We will have many picnic fishing parties on this boat, probably sleep over night and fish early dawn etc....so much better than what we could do in a canoe.
Awesome.
Thank you for sharing.
Sent from my Verizon Wireless 4G LTE smartphone
-------- Original message --------
From: Bill and Ai Qiu hopen <billhopen@yahoo.com>
Date:04/12/2015 10:57 PM (GMT-05:00)
To: Rstram <rstram@aol.com>, Richard Stram <richardastram@yahoo.com>
Subject: The electric drive sail boat
We went for our maiden voyage this evening, the lake is filled to summer pool, no leaves on the trees yet, the early dogwoods just beginning to bud, so you can see the rock formations and cliffs through the woods. Mossy creeks running down the cliffs from recent rains. Fish are beginning to rise and bats are out catching bugs...spring has sprung
the electric drive does great! it will troll/cruise very gently and quietly @ 100 watts. and go as fast as I can paddle my canoe at 350 watts or so. @ 800-1000 watts its about as fast as I can jog, say 5-6mph. I ran the boat at 1600 watts but came up against the natural "hull speed" of the craft, there is a formula: square root of length of waterline (in feet) times 1.34 = max knots theoretical hull speed of displacement craft, mine is 5.75 knots. trying to go past that is a waste of energy because you are creating a wave that you can't climb over unless you start planing like a motor boat.
I took an industrial 36 volt motor and ran it on 50 volts DC....(4 wheelchair batteries) through a very efficient PWM Pulse Wave Motor Control. we went several miles and batteries went from 51 volts down to 47.5 volts. I am very satisfied. Motor controls and digital gauges are so cheap. My boat and trailer cost 280. the motor/prop/controller/reversing switch cost 250. the batteries 300. $35 to register for 3 years. so I'm in there for under $1000.
The kids loved it, they were climbing all over the boat, snuggling in the bunks, sticking their heads out of the port holes. We will have many picnic fishing parties on this boat, probably sleep over night and fish early dawn etc....so much better than what we could do in a canoe.
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Posted by: billhopen@yahoo.com
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