Thought I'd have a lash at a model of the Hartley 19ft 5in 15 deg V cabin boat I completed about 30 yrs ago. Hartley boats are NZ designed, and there have been around 100,000 examples built, ranging from canoes to large ocean yachts. Hartleys have been built since their plans were first produced in 1938, and wherever you go in NZ or Aust you are bound to find one example. The most common runabouts in the 50s- 80s, were Hartleys, Pelins, Augustins and there are still thousands around today,(I had the Hartley and still have a 70s Pelin Nomad 12ft dinghy)
I have been thinking of building this boat for a while and have decided to power it with a jet unit to see how it goes. My particular boat was designed for a Hamilton single stage jet, to be powered by a Zephyr 6 or 149 Holden motor or similar (around 100hp) but I fitted a MK3 Zodiac 6 with a stern drive which pushed it at 30mph at 5000rpm.
I scanned a drawing from the old Hartley plan brochure and modified it to resemble the model I had, with the longer dodger with longer side windows. I then enlarged it and scaled it for 30" on A4 (I was thinking of 40"but it would have been huge) Today I took the drawing to the big local stationers and had it blown up to full size (as well as the 1/2 bulkhead/frames I had scaled). I took some measurements originally from the A4 drawing at points along the hull for the frames, (height, width etc) and estimated some of the positions I remembered from my boat. The boat has quite a flare in the bow (a feature of most larger Hartleys) so I will have to do a lot of fiddling to get it all to look right.
Tonight I cut out some trial frames,and will set these out on the keel upside down, then try out the positions with a piece of 3x3 balsa stock to get the 'flow' right. Takes a while doing it without any plan but usually works out ok, (eg my HSL , ST and Maiami) Not in any rush so this will take a while. Have ordered the jet unit (26mm El Cheapo) from Ali Express and will probably try a brushed 540 30T or similar first to see how it goes. Would have loved an AMPS stern drive, (still have a brochure somewhere I sent to UK for, about 1970) , but they are long gone (mostly collectors items now)
This will be the usual balsa/ply/glass hull with Mahogany trim etc, so should be an interesting exercise, especially with the jet, (will have to come up with a reversing bucket as the El Cheapos don't have one.)