On 6/22/20 12:14 PM, Dave Scobie wrote: ...
most of the horizontal portions of the deck and cockpit have balsa core. some of the older M17s also have a thin plywood core on the cabin wall port and starboard of the companionway.
Seems YMMV a fair bit on some of this with early M17's. My 'early' M17 #38, 1974, has no balsa core anywhere. For which I am quite glad, since I'll never have to deal with rotting balsa core, which would have happened by now on a boat this old, especially given some prior owner used @&#^$%!! silicone to "seal" various things, and, some of the deck fittings appeared to have no OEM bedding at all. Which doesn't cause any problem but possible seepage to the inside, if there's no core to rot or to trap water and cause de-lamination. Anyhow... Cockpit has foam core underneath on some horizontal parts. Cabin sides/top and foredeck have glassed half-tube reinforcement crosswise on the underside. On the cabin top it runs fairly close to fore and aft sides of chainplates and mast step. On the foredeck there are two half-tubes, spaced out what looks like an appropriate distance structurally (my foredeck is plenty solid, anyhow). The cabin layup also gets significantly thicker around the chainplates/mast step area. I could see this when I replaced the window glazing and had the frames out. Aft cabin wall has no core, thin ply or otherwise. Apparently this was a plenty solid layup & reinforcing method, since the boat has had no structural failures in 46 years (though I don't know how much hard use it got with prior owners). Those of you with M17s of similar vintage...same construction, or different? cheers, John
:: Dave Scobie :: SV SWALLOW - https://sv-swallow.com :: Montgomery 6'8" #650 :: Truck camper - https://truckpopupcamper.wordpress.com/ :: Ramblings - https://scoobsramblings.wordpress.com/ :: former M17 owner #375 SWEET PEA - https://m17-375.com/ <http://www.m17-375.webs.com/> :: former M15 owner #288 - http://www.freewebs.com/m15-name-scred
On Fri, Jun 19, 2020 at 1:48 PM Rob Bultman <rob.bultman@gmail.com> wrote:
My 1977 M17 has a HawkEye depth finder installed by a previous owner. I'm not sure what exact model is installed, but it appears to be similar to the DepthTrax 2B currently shown on their website (
https://hawkeyeelectronics.com/collections/sailing/products/depthtrax-2b-boa... ). The transducer is "glued" to the hull in the v-berth area. I finally got the boat out this weekend for my initial shake-down sail but the depth finder just showed 0 depth. The previous owner did not mention any issues with it.
The info on that page states: Glue-In Installation is for NON-CORED hulls or aluminum hulls thinner than 1/8” ONLY. Glue-in mounting of the transducer is NOT suitable for all vessels.
Does the M17 have a cored hull or should this finder just work?
Thanks, Rob
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