Hi, glenn, as a comparison on props what is the amp draw and is there a difference that makes run times any better ?? There should be a change in several things that interact. I had a Kipawa, and three bladed one was harder to store laying down at that time, should have kept it for tests. I saw that the "push" was more, but also the amp draw was high, so batteries drew down faster. The MCota props are weedless, and not fully power oriented. I pulled several boats out of heavy weed a few years ago, that I motored through and they thought they could do that too. Power props are like gassie props, need to be matched to the boat hull speed, and environment specifically.
I'm thinking of getting another Kipawa prop, as now my sail boat has the electric in a well in front of the rudder, and helps in light winds, like a motorsailer in miniature. I have around six hours of prop time, so fighting wind on lakes is the bigger deal now.
On several Minn Cota drives I have, I figure hull speed, the best lower realistic trip (cruise) speed, then prop it to find the least draw at the trip speeds. That way the max speed is only for windy conditions, and or accepting a short but emergency power draw. I use as little amps as possible to get to lower hull speeds, that are acceptable to get me home even if I have to wait for the wind to die off a bit.
Learned on a lake years ago, went downwind and explored, wind came up with wife sideways to the wind in the lake center in her kayak. Not only did my rowing dinghy not have enough in reserve to get to her, but my battery went low beside a 1/4 mile blackberry growth hung over the water and to leeward. Ever time I went windward, the waves came into the bow of my boat, stopped at the first bulkhead, and pushed it down for more water. Between bailing, rowing, and steering we both got back, but that was the last time I ever went out without a two battery set up, one as reserve. Also battery condition meters on each, is a big help.
Just a casual observation, have a great day ---------- Cal
Sent: Thursday, March 05, 2015 6:01 AM
Subject: Re: [Electric Boats] Re: Lyman 13 Torqeedo Cruise 2.0 power consumption [2 Attachments]
Yesturday I tested for the first time a marriage of a Toq. prop to a MG hub. It was quite windy so I couldn't do any precise testing but it was definately more effecient than either a Kip. or the standard MG prop. Hull speed at lower throttle. A couple of photo attached.
Glenn Holland
----- Original Message -----Sent: Thursday, February 26, 2015 12:51 PMSubject: Re: [Electric Boats] Re: Lyman 13 Torqeedo Cruise 2.0 power consumption
Before finding this site, I did purchase a Kipawa prop but since it is still winter here haven't tried it yet. I was also thinking of making a fairing for the shaft as well.
After doing some research here, I was also thinking of trying the Torqeedo prop on the trolling motor.
Most of the nearby lakes around me are electric only state parks and, from what I have witnessed, have not been exposed to a real electric powered boat of any significance to test the 'electric only' rule. My goal with this setup is just a nice no-wake cruising speed with some reserve power if needed. With two small children getting used to boating, this is about my limit at the time.
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Posted by: "cal" <h20dragon@centurytel.net>
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