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this is a case of keep the old computer around if
it works. Seems like the newest version of yahoo
chat is crashing a lot due to it's new voice
compatability - if you have an older computer without this new
feature - it works faster and seamlessly. On the flip
side my curiousity to do live chat is up. I will look
into for next months designated chat. Who schedules
that?

We can do a chat in a number of ways. One is for
someone to volunteer to lead a specific topic - another
is to just set a data - see who shows up and discuss
what people want to discuss. I am open either way.
Since I couldn't get on last time - perhaps my own
bumbling fault - I can not guarantee to be able the next
time. However, Iwould be available Feb 28th, and any
day the week of March 6th. It appears that the 8-10
pm EST slot was good for everyone? If someone does
not step forward - I will pick a date by the end of
the week - and we shall see what happens. Paul

You and others are probably all asleep - i'm in
my lunch hour. Maybe i'll have smoko (tea-break)
when you next chat. I read last 120 messages - only
saw one "Cat" reference. I have a 50 ft Atlantic Proa
(an outrigger to the unconverted) and the 9.9 HP
outboard needs replacing. I like the technical stuff, but
enjoy it more if it is exactly correct - my theoretical
limit is 9 kn so the impossible 18 kn i do on a good
reach simply means i drag a lot of water along for the
ride. I seek the hybrid solution as i need only power
in and out of port/mooring. I'll point you to some
pictures next time....

I believe that the speed limit you refer to is
based on mono hulls and also is limited to displacement
hulls. I agree that cats and even tri hull will have
high speeds. I don't think this area has been studied
enough in this forum. I would be interested in hearing
about the performance of any multi hulls under electric
power.<br> Are you using an outboard or an inboard drive.

A 27 inch ULS outboard has been on board 5 years
after 15 years with sails only. It was added at
purchase to negotiate marinas and assist anchor retrieval
so the 9.9 HP is the bare minimum and not to punch
thru storms or 200 mile becalmings. However it could
push the 50 ft, 5 tonne vessel at 8 kn in still
conditions while new.<br>Now the motor is tired, needs
expensive parts and is not powerful enough for some
situations. 20 HP is perfect for me - most 30 ft cats use two
of these 9.9s and are comparable to my boat!
Obviously i don't even enjoy having one noise maker.<br>As
i have had interest in deisel-electric in
submarines,trains,dump trucks etc. i thought it could work in boats to
get the Volts up and the Amps down. However the
danger, the weights and the need of a big smelly deisel
turned me away.<br>As i only require 20-30 minutes of
power to get to open water and the wind i turn towards
battery power with a 3 kVA generator to pump up the
batteries if sun, tow-behind or wind generators are
insufficient to charge while i'm out. There's always mains
power at marinas, but i'm on a swing
mooring.<br>Looking forward to a Solomon web page as the two-way
electron flow is what i seek! I usually have speed for
charging.<br>I seek a flat disc-shaped motor (Premag HV style)
to replace the petrol portion of my Yamaha 9.9 and
see no huge obstacles, just questions.<br>Can
corrosion resistance be retro-fitted?<br>Does a low rev
torque emphasis (for cars) preclude top-end torque or
other qualities?<br>Is heat from inefficiency margin
terminal if kept inside an outboard casing?<br>When i read
that a 2.5 inch thick, 10 inch diameter, 72 V motor
putting out 8 kW at 7,500 rpm i think why isn't there a
motor of this ilk sitting on top of my leg?<br>My
experience in EBs is limited to a rechargable drill
conversion for a canoe - works well. I plan to use gel
cells, a walk behind golf buggy motor with controller
for a small beach cat - as a tender.<br>So far i'm
enjoying this club, EVA and EBAA and gradually expanding
the base.<br>I'm developing a photo album of my
sailing boat at <a href= target=new></a>

Corrosion resistance and resistance to
electrolysis can be designed into the system by electically
isolating the system. On PM DC motors the torque curve is
not a curve at all but instead they have a torque
plateau.This is to say that the motors are capable of the same
torque at 1 rpm as they are at 1000 rpm's. Heat is no
problem in a properly designed system with motors that
have a total system eff of 90% or better. In reference
to you other statement/question 7,500 rpms is a bit
high with lower units usually having a 2 to 3 :1 gear
ratio.The motor would never get to its normally most
efficient upper 3/4's of rpm range. RPM is key...and for
pushing props...the lower the better.<br> As for the next
online chat...Im ready whenever any one else is....as a
matter of fact I think I will be hangin' around in the
chat room Wed night from 8:00 to 10:00 PM East time.
And mabey every Wed night for a while ! See yall on
line.