[Rhodes22-list] miles per gallon- miles per Watt-hr

[David Bradley]

Joe, I think there were some discussions a while back on electric
motors - you should be able to find in the archives.

Dave


On Tue, May 6, 2008 at 12:08 PM, DownHill <jadoucet at snet.net> wrote:
>
> Does anyone have experience with electric outboard motors?
>
> The data I have is for a 101 lb thrust, saltwater, riptide, Minnkota.
>
> I used a 36 V, 70 Amp hour lead acid battery pack. (2,500 Watt-hr)
>
> In  calm water it would produce about 5.5 kn at full throttle.  More
> typically I would run it at 4.5 kn if I wanted to go any distance.
>
> I never ran out of power, but then I never ran it more than 2 hrs.  Usualy I
> just use the motor to navigate harbors, troll,  or to get on/off my slip.
> The electric motors have the obvious advantage of being quiet and always
> starting.  They also have more torque at low speed which is nice when
> manoevering in tight spaces. Electric motors are not for cruising, but are
> very good for day sailing, fishing, etrc.
>
> I'm thinking of switching batteries to a LiPo or NMH battery to save weight
> while racing, but these batteries are very expensive.
>
> Joe
>
>
> MichaelMeltzer wrote:
>>
>> Depends,
>>
>> Rules of thumb, gallon per hour. Leaves some room for reserves.
>>
>> Clean hull, low winds and waves, engine in tune, etc.. and biggest factor
>> about 1/2 knot under hull speed, about 1/2 to 2/3 a gallon per hour, but
>> your millage may vary, so use the above rule until you calculate it out
>> for
>> yourself.
>>
>> -mjm
>>
>> -----Original Message-----
>> From: rhodes22-list-bounces at rhodes22.org
>> [mailto:rhodes22-list-bounces at rhodes22.org] On Behalf Of cowie
>> Sent: Friday, May 02, 2008 9:59 PM
>> To: rhodes22-list at rhodes22.org
>> Subject: [Rhodes22-list] miles per gallon
>>
>>
>> Does anyone know about how many miles per gallon the Rhodes 22 will get
>> with
>> a Yamaha 9.9?
>>
>>
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>>
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>
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>
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-- 
David Bradley
+1.206.234.3977
dwbrad at gmail.com