Were you able to put your body weight in the same place for both the Torqeedo and Tohatsu? The Torqeedo is almost as much power as the Tohatsu and has a much more efficient prop so I would have thought it could plane the dingy too.
Thanks for the data.
Denny Wolfe
----- Original Message -----
From: ravlegend
To: electricboats@
Sent: Tuesday, July 21, 2009 3:07 AM
Subject: [Electric Boats] Torqeedo Cruise 2.0 test comparision.
These are the sea trail data collected from my recent 10' portabote excursion. Thought you guys may be interested also.
I had to borrow an el cheapo GPS which gives out speed in KM (MPH in parathesis
from my conversion). Don't know how accurate the GPS is, but at least the speed
reading of each motor can be used for comparison.
Some basic parameters:
My weight + safety gears = 170#
Wind speed - not noticeable
Readings are taken to/from 2 areas in the water to neglect any variables caused
by tide, current, full moon etc.
Motor #1 - Minn Kota 55# Riptide trolling motor
Motor Weight - 28#
Battery weight - 30#
Voltage - 19.6V (should be a 12V but wanted to test the higher RPM)
Speed display- 4km (2.48mph)
***motor would cut off after a 20 sec. run or so, probably due to higher voltage
protection in the controller)
Motor #2 - Torqeedo Cruise 2.0 electric outboard
Motor Weight - 40#
Battery weight - 40#
Voltage - 26.2V
Speed display - 12KM (7.45mph)
Motor #3 - 3.5HP Tohatsu 4 strokes (gasoline)
Motor Weight - 41#
Gas/can weight - 2#
Max speed - 18km (11.18mph)
***acceleration went drastically from 8KM to 18KM once my body shift slightly to
the front to plane the bote.
Summary:
I noticed a slight speed improving when lowering the trim - maybe a half or 3/4
KM/h per trim position. Unfortunately the last trim position of the Torqeedo
rubbed against the boat.
Surprisingly (or maybe not so), the best speeds are achieved when the battery
pack is placed all the way in the bow area. Basically as balanced as possible.
I tested the battery pack placement from transom floor area to the next floor
area, generally a gain of 1 KM per position. I wasn't able to put in more than
40# dead weight at the bow area when testing my Torqeedo (to counter my heavy
bottom in the transom area). Would these additional counterweight make it go
even faster? Seem counterintuitive. Any thoughts? Stay tune...
Disclaimer - YMMV
>
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