I may be “missing the boat” here but I got the sense that the OP was talking about replacing the keel roller, not rollers vs bunks? Henry On Sat, Jul 18, 2020 at 5:36 PM Dave Scobie <scoobscobie@gmail.com> wrote:
The Jerry built Mboats are almost all on a TrailRite trailer and the majority of the weight is on the hullside bunks with just a bit of the keel resting on a roller.
The Mboats with Pacific trailers are about 50/50 weight hullside bunks and on the keel bunk. The Sage 17s are the same.
In contrast the Sage 15s and SageCats rest 100% on the hull (once the boat is on trailer the daggerboard is lowered so the bulb is resting on the 'keel bunk' so the cabin top isn't holding the board weight while pounding down the highway).
:: Dave Scobie :: M6'8" #650 :: SV SWALLOW - sv-swallow.com :: former owner M17 #375 SWEET PEA - m17-375.com :: former owner M15 #288 SCRED - www.freewebs.com/m15-named-scred/
On Sat, Jul 18, 2020, 3:19 PM <casioqv@usermail.com> wrote:
How would putting most of the weight on the keel work with an M15? My trailer only has bunk boards, but typically the centerboard sticks down from the bottom of the keel, and isn't designed to support the full weight of the boat. I think it would be hard to design a keel support that wouldn't load the centerboard, and wouldn't be sensitive to slight misalignment.
Sincerely, Tyler '81 M15 #157
----- Original Message -----
Sent: Saturday, July 18, 2020 2:59:42 PM
I know there are a million dissenting opinions, but my ‘84 was on rollers and there was no issue with the hull at all, and no issue launching and recovering either, super easy with rollers. As I’ve always said, there are literally millions of boats sitting on roller equipped trailers without damage, they can’t all be wrong. Get a couple of small rocks or sand embedded in those bunk boards and watch it shred your hull every time the boat grinds across it and you’ll be be repairing that too (I’ve seen it). With an adequate number of rollers the M15 shouldn’t weigh enough to damage its own hull on rollers unless your boat was built with shoddy workmanship and a thin hull, most of the weight should be carried on the keel anyway! And I’m not going to get in another long “rollers vs bunks“ argument, just giving one person’s opinion, worth exactly what you payed for it.
Rusty
www.rustyknorr.weebly.com
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