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Author Topic: Racing Sparrow 750  (Read 299 times)

rosso69

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Racing Sparrow 750
« on: November 07, 2020, 02:22:02 pm »

Hi Guys,


Just started my new lockdown project - a Racing Sparrow 750.  It's based on a free plan from Racing Sparrow.co.nz.  It will be my first plank on frame build, so I may need some tips and advice as I go along.  I've been building planes for 45 years and recently built a Fairey Huntsman 31 and a Wee Nip (Strathclyde 70) sailing yacht, so thought I'd step up a gear and go for plank on frame.  I'll upload some photos as I go, with today being the first day of the build, so mainly cutting out the bulkheads and setting them out.
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CGAux26

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Re: Racing Sparrow 750
« Reply #1 on: November 07, 2020, 05:40:28 pm »

Welcome to plank on frame building.  I have built 2  boats this way. I made a plank soaker from PVC pipe, cut to the length of the balsa strips.  Soak them for at least 30 minutes in Windex.  Longer soaking is OK, too.  Take one strip out and wipe it with a paper towel, leaving it wet.  Run thick CA along the frames and the edge of adjoining planks, and apply the plank.  Hold it in place with your fingers for about 30 seconds.  No pins or clamps needed.  Do a length of plank just long enough to control with your hands.  Keep doing this for the length of the plank, then trim off the excess. 


You will have CA on your fingers, but if you wipe it hard on a paper towel it will not stick fingers together.  Keep the CA debonder handy anyway.


And keep your working area well ventilated, with a fan perhaps.  CA is hard on the lungs.


And have fun!
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rosso69

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Re: Racing Sparrow 750
« Reply #2 on: November 07, 2020, 11:21:07 pm »

Thanks for the advice.  I'll certainly give it a try!
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rosso69

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Re: Racing Sparrow 750
« Reply #3 on: November 13, 2020, 08:18:48 pm »

Part way through planking now, so here are some photos of progress so far.  Cutting the 1/16" x 1/8" wide planks is not as easy as I thought, but with careful use of my scroll saw, cutting into both ends of the sheet and joining the two cuts with a scalpel actually gives a good, straight plank.
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Martin [Admin]

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Re: Racing Sparrow 750
« Reply #4 on: November 13, 2020, 09:40:26 pm »


Looks Great!   :-))
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dlancast

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Re: Racing Sparrow 750
« Reply #5 on: November 21, 2020, 07:52:34 am »

are your planks made from Balsa wood?  You are doing a nice job of keeping the planks fair, even with a long space between bulkheads.  Are you edge gluing your planks as you go?  I like to start my planking from the deck and work my way towards the keel, tapering each plank towards the bow and using "stealers" where needed towards the stern and bow.  You can check out my current project of the racing yacht Endeavor.  Keep up the good work.  Always find planking to be very satisfying.
Best to you,  Dennis
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