[Public-List] A-4 Two blade propeller survey

[Greg Hounsell]

Afternoon;

I'm glad others are enjoying their 13x7. For me running at 1200-1500 rpm
means the engine is lugging at around 8-9 hp. causing fouled plugs and
tougher to get the idle set and proper advance at "cruise" .

For those running with this prop and at 1500, what is your wife open
throttle rpm?

Cheers
Greg #592

On Sun, Apr 26, 2020, 3:51 PM Jeffrey Randall via Public-List <
public-list at lists.alberg30.org> wrote:

> Hello on a cloudy Sunday,
>
> Also a 13/7 two blade.  I concur on the RPM limits but have reconciled it
> with the fact that we are still at 5.5 or better and steady.
> I also agree that to really work the boat in small spaces requires a
> considerable amount of feathering of both the rpm and F/Reverse gears.
> Would a 3 blade change that significantly?
>
> And while the prop walk is considerable, I assume all sailboats similarly
> susceptible.  Also, as a frugal sailor I am hesitant to fix what I feel
> aint broke, at least for me.
>
> All that said, I consider myself an aggressive but disciplined fair weather
> sailor and have not experienced the worst, or even lots of just bad
> weather, to test me and the boat.
>
> Jeff Randall
> Yankee Star 296
>
>
>
> On Sat, Apr 25, 2020 at 8:06 PM Greg Hounsell via Public-List <
> public-list at lists.alberg30.org> wrote:
>
> > Afternoon
> >
> > I have a 13" x 7" prop. It came with the boat and not happy with it at
> all.
> > The Atomic on reaches around 1400rpms and that's it. It also only leaves
> > about a 3/4" Gap at the top.
> > In Marinas constantly in and out of gear at idle otherwise speed too fast
> > and major propwalk in reverse.
> >
> > It does plow through headwinds and 1-2m waves easily.
> >
> > Purchased the Indigo 3 blade this winter. Maybe we'll get to try it this
> > season??
> >
> > Cheers
> > Greg #592
> >
> >
> > On Sat, Apr 25, 2020, 1:10 PM charles pleisse via Public-List <
> > public-list at lists.alberg30.org> wrote:
> >
> > > If your Alberg 30 has an Atomic 4 with a two blade prop,
> > > What diameter is you propeller?
> > > What is the pitch is your prop?
> > > At what RPM do you achieve hull speed?
> > > How content are you  with,
> > > forward thrust
> > > reverse thrust
> > > amount of prop walk
> > >
> > > Charles Pleisse
> > > Sookie #221
> > > _______________________________________________
> > > These businesses support your Association:
> > > http://www.alberg30.org/store/A30supporters.html
> > > Please support them.
> > > _______________________________________________
> > > Public-List mailing list
> > > Public-List at lists.alberg30.org
> > > http://lists.alberg30.org/listinfo.cgi/public-list-alberg30.org
> > >
> > _______________________________________________
> > These businesses support your Association:
> > http://www.alberg30.org/store/A30supporters.html
> > Please support them.
> > _______________________________________________
> > Public-List mailing list
> > Public-List at lists.alberg30.org
> > http://lists.alberg30.org/listinfo.cgi/public-list-alberg30.org
> >
>
>
> --
> Sincerely,
>
>
> Jeff Randall
> JCMedical
> 603-498-5574
> _______________________________________________
> These businesses support your Association:
> http://www.alberg30.org/store/A30supporters.html
> Please support them.
> _______________________________________________
> Public-List mailing list
> Public-List at lists.alberg30.org
> http://lists.alberg30.org/listinfo.cgi/public-list-alberg30.org
>