G'day Ernie, All
At 01:16 PM 7/02/2010, Ernie wrote:
>2. EV cars now have alot of DIY people , and TELSA (wow) plus the
>hybrids--won'
>3. OK for the displacement people ----Ever seen how quick a jet ski
>, or jet boat gets on plane.
>The DYI people are usilg Golf cart of fork lift electric motors and
>are very happy!
http://www.evalbum.
of all kinds, including a few boats. Look at the higher power
(heavier trucks) and drag racers for some idea of power at a DIY level.
>6. The motor at 5-7000(redline) worked it !
Contact Jim at hi-torque electric, he's the builder of the motors in
the White Zombie car recently posted about. -
http://www.hitorque
ages, but his Email still worked last time I tried.
>7. So my Question was --Has any one attempted this, and any one
>know of a elec motor that will turn this rpm without going exotic to
>ac, 3 phase etc. Pref series dc, one way, don't need a 2 direction
>motor. Seems to work Great for cars.
Can be done, but you'll need a series DC motor with a steel
commutator [clamping] rather than moulded bakelite like typical
cheaper DC motors. Jim at Hi-Torque can rebuild an older (stronger)
motor to better than new for less than new price, if you ask him
nicely. To get that power at those revs is a bit of a challenge -
smaller motors can handle the revs OK but become problematic to get
the power. For example, White Zombie has a pair of 8" diameter motors
(siamezed together) and does the sort of power you are talking about,
but at that power the efficiency goes out the window, so the run time
at full power is measured in seconds, rather than minutes as the 8"
motors are too small to shed the heat being made. The fols over at
national electric drag racing association http://www.nedra.
be able to help you.
>8 Not looking to go to Bahamas. When you think about it, if you go
>out boating--I have to contend with Manatee zones, 5mph,
>Intracoastal etc . and usually go clamming or fishing, so a day may
>consist of little full speed in a 4-5 hr period an average.
Possible, the AMC's jet boat (which is a 7 meter long scale model
hull of an 80-meter fast ferry) has had 6 hour range at that sort of
speed, but with 9.6kWh of lead batteries the weight makes it
impossible to plane.
>11. Last, amen, -- ELCO has done it for years, and the Queen Mary
>and alot of new jobs run on elec. with thru hull drives for
>direction-- SO --help me with any more inputs
QM is hardly a comparison, with its' azipods (I think that is what
they're called) that's just an up-scaled modern tug design, heavy,
stable and reliable.
I think if you want to do this, you'll need something like this (from
http://www.evcompon
They have a kit for $18k:
http://www.evcompon
, you wouldn't need the vacuum pump, no brakes!
Probably a bit heavy, though, so drop to 50 cells to save 150lbs,
still gives 18kWh, drop from an 11" to a 9.25" motor to save another
100lbs or more. Have a 'hack' around their site, get a feel for the
weights involved and see how your boat can cope with the weight.
Don't forget that the 70hp motors can deliver 210hp for 15 min
without a problem, so the 9" motor can cope with the power, but maybe
not the revs, since it will have a bakelite comm.
Hope this helps
Regards
[Technik] James
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