found your newsletter
the article on the home made battery packs is interesting
From: Kirk McLoren <kirkmcloren@yahoo.com>
To: "electricboats@yahoogroups.com" <electricboats@yahoogroups.com>
Sent: Monday, May 14, 2012 12:08 PM
Subject: Re: [Electric Boats] Re: File - Welcome- Electric Hubcap
interested in how you measured 95% efficiency.
I am interested in building a 500 watt pancake.
Any suggestions re what to read?
... How beautiful it is to do nothing, then rest afterwards
From: Craig Carmichael <craig@saers.com>
To: electricboats@yahoogroups.com
Sent: Sunday, May 13, 2012 7:00 PM
Subject: [Electric Boats] Re: File - Welcome- Electric Hubcap
Hi,
I just joined. I've been developing the "Electric Hubcap "
36V/130A/5KW BLDC pancake motor. (Among other things.)
Here are short snips from an early version (converted Honda 7.5 HP), Nov. 2010.
Launch from wharf: http://www.youtube.com/watch?v=yUfqSSnEh5c
From Onboard: http://www.youtube.com/user/TurquoiseEnergy
Inside motor: http://www.youtube.com/watch?v=X1MkdixNLcc
The motors are now much improved... enclosed in a tough
polypropylene-epoxy case and have perhaps 95% peak efficiency. I'm
re-doing the Honda with the latest motor. (It should be quiet - the
shaft was pressing down on the gears in the first version.)
For a speedboat, the Honda's RPM is too low because of a built in
2.8 to 1 speed reduction at the bottom of the leg to the prop. The
motor gets to its top RPM (~2000) without pushing very hard. So I'm
also planning an "electric outboard from scratch" that would have 1
to 1 or thereabouts. I was going to use a chain drive, but have
realized a toothed belt (as in car engine timing belt) would be
quieter and could let the leg be made narrower.
Regards,
Craig
Victoria BC Canada
http://www.TurquoiseEnergy.com/
=====
>Welcome to the Electric Boat Club at Yahoo.
>Feel free to introduce yourself to our membership by posting an email.
>Do you currently own an electric boat?
>Did you convert a boat to electric drive?
>Are you interested in building or purchasing an e-boat?
>Let us know. Share your experiences---add links and photos of your
>project to our photos section.
>We have over 1400 members and 6000 messages posted as of Jan, 2007.
>There is much information in these past postings and the links are helpful.
>
>Myles Twete, Portland, Or.
>Moderator of Electric Boat Forum
I just joined. I've been developing the "Electric Hubcap "
36V/130A/5KW BLDC pancake motor. (Among other things.)
Here are short snips from an early version (converted Honda 7.5 HP), Nov. 2010.
Launch from wharf: http://www.youtube.com/watch?v=yUfqSSnEh5c
From Onboard: http://www.youtube.com/user/TurquoiseEnergy
Inside motor: http://www.youtube.com/watch?v=X1MkdixNLcc
The motors are now much improved... enclosed in a tough
polypropylene-epoxy case and have perhaps 95% peak efficiency. I'm
re-doing the Honda with the latest motor. (It should be quiet - the
shaft was pressing down on the gears in the first version.)
For a speedboat, the Honda's RPM is too low because of a built in
2.8 to 1 speed reduction at the bottom of the leg to the prop. The
motor gets to its top RPM (~2000) without pushing very hard. So I'm
also planning an "electric outboard from scratch" that would have 1
to 1 or thereabouts. I was going to use a chain drive, but have
realized a toothed belt (as in car engine timing belt) would be
quieter and could let the leg be made narrower.
Regards,
Craig
Victoria BC Canada
http://www.TurquoiseEnergy.com/
=====
>Welcome to the Electric Boat Club at Yahoo.
>Feel free to introduce yourself to our membership by posting an email.
>Do you currently own an electric boat?
>Did you convert a boat to electric drive?
>Are you interested in building or purchasing an e-boat?
>Let us know. Share your experiences---add links and photos of your
>project to our photos section.
>We have over 1400 members and 6000 messages posted as of Jan, 2007.
>There is much information in these past postings and the links are helpful.
>
>Myles Twete, Portland, Or.
>Moderator of Electric Boat Forum
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