Hey Paul
I do have a 2:1 gear reducer and it reverses rotation but that worked out great for the Mars PMAC. The mount is aluminum and made up of 2 pieces of angle and U channel bolted together.
I also was planning on doing a belt/pulley reducer and still might just to see the difference. The advantage of the that is easier to change reduction ratio and the (for my install) placing the motor closer to the aft of the boat allowing for more space in my engine compartment. I can just fit 2 group 31 batteries between motor and compartment door. The other 2 batteries go where the fuel tank was.
Yup i did my conversion in the water but the bottom needs redoing so maybe I'll change the prop when that happens next year.
Every thing takes more time than anticipated. I thought I would have had this done last month.
P.S. I really like the large Cycle Analyst although you do have to provide your owe enclosure.
P.P.S. Did I mention that the Mars PMAC is noisy?
Doug
--- In electricboats@yahoogroups.com, "tartan27hull157" <tartan27hull157@...> wrote:
>
> Doug -- thanks much! This is very similar to what I am thinking of putting in my T27, the pictures are a great help!
>
> I can't quite see, is there reduction? From the angle of the motor it looks like it is bolted directly to what looks like a sort of bellhousing integrated with the pillow block...so, is it direct-drive? Or perhaps there are gears or a belt I can't see.
>
> I have a longer shaft alley, so my plan was to put the motor aft of the forward end of the prop shaft (above the prop shaft). The prop shaft and drive shaft would penetrate a plate which supports both the thrust bearing (below) and the motor (above), with a toothed belt running about 2:1 between them. Like you, I was going to mount this whole "sled" on rubber engine mounts, though I wasn't sure how much need there would be for dampening. My A4 didn't seem to vibrate much, and I have the shaft out to get it checked by a prop shop...I may replace it, as well as the prop (obviously, I am out of the water...if memory serves, you did your conversion in the water?).
>
> Anyway, thanks again for the detailed info and appreciate any thoughts you have on the design of the mounts. I looked into "drop-in" replacements and even helped another guy in the yard "drop in" his SolidNav Explorer...it didn't exactly "drop in," so I am still pretty interested in fabricating a solution specific to the space available.
>
> Take care and happy sailing, Paul
>
> --- In electricboats@yahoogroups.com, "Doug" <dj2210@> wrote:
> >
> > Thanks and yes I have 4 rubber mounts which you should be able to see under my photos. I didn't spend too much time in the alignment stages just made it connect to the coupler. My atomic four also had a vibration (although not as bad) so I'm wondering if the prop shaft is bent or not balanced.
> >
> > --- In electricboats@yahoogroups.com, tartan27hull157@ wrote:
> > >
> > > Doug-congrats on your first e-sail! Curious about your vibration issue. Do you have any dampening installed? I am looking at the same motor/controller combo and am trying to figure out best way to mount it.
> > > Sent via BlackBerry from T-Mobile
> > >
> > > -----Original Message-----
> > > From: "Doug" <dj2210@>
> > > Sender: electricboats@yahoogroups.com
> > > Date: Sun, 07 Nov 2010 02:17:24
> > > To: <electricboats@yahoogroups.com>
> > > Reply-To: electricboats@yahoogroups.com
> > > Subject: [Electric Boats] Catalina Conversion First Try
> > >
> > > Installed the Cycle Analyst this afternoon and since the wind was up decided I needed to sail. This is the first time that I've had a chance to try out what I spent time and money on. This is what I observed with my iPhone gps 5.4mph(4.6knts) @70amps. 50amps produced 4.5 mph. Battery consumption for the time the motor was on used 22ah.
> > > The controller (Kelly) temperature was slightly warm and the motor (Mars PMAC) was very warm. I didn't have a temp gauge but I could put my hand on the motor for a few seconds until I needed to let go.
> > > I do have some issues with vibration which I'll have to correct and it is louder than I expected producing a loud whine.
> > > Whats nice is just flipping a switch to run it- no water, fuel or smell.
> > > Doug
> > >
> > >
> > >
> > > ------------------------------------
> > >
> > > Yahoo! Groups Links
> > >
> >
>
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