James
What are your thoughts on Hybrid?
I have a cruiser with twin v8's, would be nice to convert to Genset maybe I
v8 two electric. Big advantage would be more RPM maybe? 1 V8 Less fuel.
Still a bit grey on this petrol ver electric torque HP equivalent thing.
Regards
Terry
Sydney
----- Original Message -----
From: "James Massey" <jcmassey@netspace.
To: <electricboats@
Sent: Thursday, February 04, 2010 1:12 PM
Subject: Re: [Electric Boats] Jet Boat conversion
> At 08:40 AM 3/02/2010, you wrote:
>>Has or does anyone know of a 16 foot Jet Boat to electric conversion?
>>There is no transmission or reverse needed so it would be direct.
>>I'm looking for a 4000--6000 rpm motor, simple set up. Any info
>>very appreciated.
>>
>>Thanks, Ernie
>>vacationdoc@
>
>
> G'day Ernie
>
> The Australian Maritime College - Vessel Propulsion Lab vessel
> "greenliner" is a jet boat, but a low speed one, not really
> efficient. We have had it up to 11 knots at 96 volts - it normally
> runs 48V and no more than 6.5knots. With 120V and a lighter battery
> it should plane at about 16 knots - that is what it did before with
> the internal combustion engine. Run time will become an issue then,
> as it'll be running probably about 20kW, so at 120V about 160 amps,
> so a 200Ah lithium battery would be about 200kg (down from 250kg now)
> and give just over an hour, and that is in a skinny, low-drag hull -
> 7 meters, so longer than your 16 foot.
>
> The motor is simple enough, pick your lump of DC motor from ADC,
> warfield (warp), High torque electric or others, (google 'em will
> find 'em), also through a number of EV parts suppliers. Depending on
> your setup you could use a 2 or 3- step 'rectactor' controller, 24V,
> 48V, 96V, consisting of four or five contactors and some honkin'
> great diodes, no electronics to throw a 'hissy' when it gets damp. 3
> electric speeds plus the variability of the bucket should be enough.
> Add four 24 volt chargers and good to go.
>
> Only trouble is, your really going to need to look at Lithium
> batteries to keep the weight under control, so as to have more than a
> few minutes of fun (run) time, so battery management system, all that
> other guff that goes with it.
>
> How deep are your pockets? If you can throw a good chunk of dollars
> (or whatever currency is legal tender in your country) at it, then
> easy, have fun. If you are 'on the cheap', then maybe a jet boat is
> not so practical. What do you want to use the boat for? If a short
> run across a fast river, then it may be OK with lead batteries -
> although a bit embarassing when you try and sneak an extra trip and
> get caught out halfway.
>
> Regards
>
> [Technik] James
>
>
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