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Build Log
1/3 Scale Ka3
Hi there,
So, here is my new project for the beginning of the winter ! During Retroplane, we were talking and showing the 1/4 scale Ka3, and between 2 glasses of schnaps ![]() Ah well, sometimes, it's hard to say no to things like that ! ![]() So, I have redraw the smaller Ka3, change a few bits and pieces, and here we go ! Slow start, let's say a warm up, with the tail mounting pieces. The parts : ![]() And 10 minutes later : ![]() And that's it for today ! Next on that piece is to glue the carbone tubes for the V tail. Next... Well, I have to make space in the garage now, and I'll certainly start the fuselage. Fred |
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Hi Fred,
Why not copy the Cliff Charleswoth plan to 1/3 scale. His designs are fantastic, and so the K3. I have flown one of his designs in 1/3.5 scale for 6 years with great succes. Now it's sold to Germany for it's second life. See for info on UK site of the scale soaring group: www.scalesoaring.co.uk Solitairyman |
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I would say because Fred plans to kit and sell this design when he is done with it and that's not a real good idea if you don't use your own design! ![]() |
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Well, I think SDZ have a point here !
![]() And even if I was not going to sell short kit, I design all my gliders, that's a big part of the fun ! ![]() ![]() So, here is the progress on the machine so far... Sunday, busy day in the workshop, with the building of the fuselage. A looooong 5x5 hardwood strip is placed on the plan. Everything is aligned with a laser and fixed to the workbench. Then, all the formers are glued to the wood, checking at each time the alignment : ![]() Of course, you also need to check that evrything is square ! ![]() And we glue everything slowly, making sure everything is straight ![]() Then, we can glue the wing support on the fuselage ![]() |
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Then, the next job is to glue all the 5x5 hardwood strips to the fuselage...Twice ! because I glue a first 5x5 strip, then, once dried, I glue a second one on top. Easier to bend, and once the second one is glued and dry, this is, well, I think, much stronger than a single 5x10 strip.
Of course, you glue each strips doing each side at the time (symetric and avoid the fuselage to go banana ! And you can check that everything is square using the laser ![]() Once dry, you can move the fuselage to have a first overall look at the beast ! ![]() So, next, finishing of the fuselage webing, and another few bits and pieces and we can start to have a look at the wings ! |
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Hi Justin,
Sorry, I've put the specs on the Scale Soaring UK forum, but not here... So, here we go : Wing Span : 3.33 mtrs Fuselage lenght : 1.87 mtrs Wing chord : 35 cm Single stabilisator span : 42 cm Weight : I think that's going to be around 6 kilos, we'll see ! Well, for the production.. that will be once the prototype is built (should not take long ![]() I can't really give a time span, but that should be relatively quick as it is relatively easy to build (yep, everything is relative.. ![]() ![]() But I'll keep you posted ! |
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Hi Justin,
No problem, can mail pretty much anything to anywhere ! ![]() Here is the progress on the fuselage : ![]() ![]() The "webing" is finished ! ![]() Next, I think I'm going to shape the nose and work on the Vtail ![]() |
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Hi Fred,
Got the measage ![]() But all looks great anyway. Looking forward to the rest of the plane. keep us posted. Solitaryman |
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Thanks Solitaryman
![]() Back to the Ka3 now, with a bit of work on the huge V-Tail over the week end ! All the pieces ![]() And here we go ! The V-Tail assembly is a non event.. no difficulties at all here... ![]() ![]() Ok, you can see the burn here... I think the cnc laser machine did a break here :lol: ![]() ![]() And the result to motivate me ! |
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Next are the LE, sheeting (with 2mm balsa) and the tail joiner made of carbone tubes (7mm ext. and 5 mm int.) and glued with epoxy
Same here, a non event... ![]() ![]() Et voila ! the hinges are Robart type. the moving tail LE is sanded in 1/2 circle. ![]() Next ?... back to the fuselage, with the nose cone, and i'll start to have a look at the cockpit interior... |
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Not a lot done over the week end...
But a bit of work on the wings. So, 1/2 wing is almost completed, just the sheeting need to be done. Photos of the early stages : ![]() The spar is made of Pine wood... ![]() And then, the top spar : ![]() For the ailerons, a balsa pieces is interlocking with the ribs. ![]() Easy ! Well, I'll take more photos tonight, but the wing tip is done, so as the Leading edge (balsa 10mm + 5mm) and waiting for the wing joiner to come in to complete the sheeting. I'll start the second 1/2 wing tonight ! ![]() |
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