Re: Shaft seal like the one Robb While used ...
I also remember reading that Robb changed to a conventional shaft seal
after hearing that the ceramic types, when failing, failed suddenly
with no warning at all.
--- In AtkinBoats@yahoogroups.com, Kenneth Grome <bagacayboatworks@...>
> > I haven't seen what he used, but based on his description,
> > I think what are shown on this page are similar:
> > http://www.mcmaster.com/nav/enter.asp?pagenum=3372
> Hi Ron,
> Thanks for that link! It got me started on the right track, then I
> found some other web sites with even more details on this type of pump
> shaft seal. It looks like I can use them in the boat I'm building
> and well as in several of the inboard powered boats I'm designing.boat
> These Atkin tunnel-stern Seabright skiffs are intriguing to me. I
> especially like Shoals Runner's bottom design. I know of no other
> that offers such an attractive combination of features as these:[Non-text portions of this message have been removed]
> 1- a very well protected propeller and rudder
> 2- drafts only 6-7 inches with the prop in the water
> 3- sits stable and upright when out of the water
> 4- can be beached almost anywhere without damage
> 5- can be trailered on a cheap flatbed utility trailer
> 6- is very seaworthiness in offshore conditions
> 7- uses an inexpensive, fuel efficient inboard engine
> 8- gets better than average mileage at 15-20 mph
> 9- runs efficiently throughout its entire speed range
> Lots of people seem to be very intrigued by Rescue Minor. But as I
> understand it, Shoals Runner is William Atkin's last design of this
> type. This suggests that he may have identified deficiencies in his
> earlier models (possibly including Rescue Minor) and corrected them
> when he designed Shoals Runner.
> This is only a theory of course, but it appears to 'make sense' to me
> after reading performance reports on Rescue Minor and noting subtle
> differences in the characteristics of these two hulls from the line
> drawings on the web site.
> I'm designing some new versions of these tunnel-stern Seabright skiffs
> myself. I'm leaning toward hull bottoms that look more like Shoals
> Runner because of my theory that the more recent designs in a naval
> architect's portfolio are often better boats than earlier models.
> Ken Grome
> Bagacay Boatworks
> I also remember reading that Robb changed toHi Lewis,
> a conventional shaft seal after hearing that the
> ceramic types, when failing, failed suddenly with
> no warning at all.
Thanks for this information.
Do you happen to remember where you heard or read this? If so can you
point me to the reference? I'm asking because I thought I had read
everything there is to read about Robb's Rescue Minor, and this is news
I don't know much about ceramic shaft seals either. Maybe they fail
catastrophically and maybe they don't. I'm reading about them now ...