Yup,  Have used both and let me tell you the R22 furles a lot easier! I
think about it every time I furl the big one on the Catalina.  I do miss my
Rhodes.  Just paid the insurance on it even though I am not sailing it
(required) but it is so cheap I don't mind.  One of the reasons I spent so
much money (more than I paid for the boat) to ship it over to Greece was
because of the IMF.  Thanks again to Stan for coming up with this
marvelous feature!

Chris Geankoplis
SV ENOSIS

On Sun, Jul 19, 2020 at 4:30 PM Jesse Shumaker <
jesse.laten.shumaker at gmail.com> wrote:

> Hi Tom,
>
> The R22 IMF furls in the opposite direction as the illustration depicting
> the Selden furling shown in the article.  There is a vertical batten that
> is inserted into the UV resistant portion of the sail, which is the thick
> colored section that sticks out when the sail is fully furled.  Forgoing
> battens on the rest of the main seems to the price you pay in terms of
> performance in exchange for the big benefits in terms of ease of using
> IMF.  Horizontal battens are reserved for mains that hoist in the
> traditional manner, or perhaps they could also be used on boom roller
> furling, which seems to be less common than IMF.   I've not heard of anyone
> else adding additional vertical battens and I'm not sure the mast would be
> large enough to accommodate the extra size of a furled sail including
> vertical battens.
>
> I haven't yet sailed on a larger boat with IMF, but people who have used
> those and then come on my R22 seem to be surprised about the ability to
> raise and lower the entire system (boom and mainsail) with the pin going
> through the gooseneck to the mast.  I suppose that's not an option on a
> larger boat because of the extra weight.  It is nice to have a high boom
> normally for plenty of room in the cockpit and to catch the most wind up
> high, but then be able to lower it quickly in stronger conditions.
> Lowering the center of effort reduces heeling.
>
> Maybe Chris G. could provide some perspectives on IMF for the R22 vs. a
> larger boat since he also has a Catalina 38(?) with IMF.
>
> Jesse Shumaker
> S/V Zephyr
>
> On Sun, Jul 19, 2020 at 2:39 PM Tom Van Heule <
> tom.vanheule at intrinsicprograms.com> wrote:
>
> > Hi, I came across this article today - and was searching in the archives
> > for any details - lots of talk on the IMF, but nothing explaining the
> > system (that I have found!).  Aside, Is anyone using battens? vertical or
> > horizontal?    Is the GBI system similar/different from the Selden
> > description?
> > https://www.sailmagazine.com/diy/how-to-a-trouble-free-furling-main
> >
> > It was a nice read to hear some support for IMF in either case.
> >
> >
> > --
> > Tom Van Heule
> > Intrinsic Programs
> > tom.vanheule at intrinsicprograms.com
> > +1 303 525 5266
> >
>