Mark Elen
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I'm nearly there with the rear formers now. But i'm not happy with the 2 laminated ones. In my excitement of a new technique, I rushed them a little and the 1/32 ply strips didn't quite go together properly. Also, I took them out of the jigs after a couple of hours. - they have both bowed inwards at the bottom and now need forcing out to sit in the correct location on the fuselage. The front one has a slight twist in it too. Nothing for it but to make up a couple of new ones. These new ones will sit in the jig for a couple of days before they get touched. Cheers Mark
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Hi John, Either brave or stupid. My money is on the latter rather than the former😂😂😂 I was worried that it would be underpowered. Cheers Mark
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Hi Gents, I had considered removing part of those Danny. The plan on outerzone calls for 1/8 x 1/4 uprights with 3/16 square cross braces. My plan from sarik, calls for 1/8 x 1/2 uprights but doesn't specify the cross members. To be honest, if I was to hack some away, I don't think I would save much, as I remember thinking how light they felt when I was making them up. Thanks for the info John. I have had a weigh of the engine bits this morning: 439 grams. It looks like I'm going to need that bit of extra weight at the back to balance these out. I have pretty much decided to carry on 'per the plan' and see how it turns out. If I can get somewhere near 9 1/2 pounds I will be happy. Many thanks once again John for your kind offer. I got a little done last night and this morning: Cheers Mark
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I have been thinking long and hard today, regarding the comments above, re the weight of wood, versus fibreglass nacelles. Dennis Tapsfield’s article says that the original build weighed in at 9 and a half pounds, and it needed 4 oz of lead in the nose, along with a nicad for the retract servos. (I’m not going to have the luxury of a heavy nicad to use for balance) Would this be classed as heavy for a 80 4 stroke? Considering that the nacelles are pretty much all forward of the CG, is it going to be wise to loose roughly a pound from them, only to have to lug around half a pound of lead in the nose to compensate? The other worries are that: a) the nacelles will take a lot longer to produce, due to it being something I need to learn how to do. b) I will need to fix them securely to the wing, considering the forces involved - this is my biggest worry. c) It will be easier to cover wood with the same covering as the wing, than paint and match with the covering - no, this is my biggest worry, by far! 😂😂😂 Decisions....decisions. Cheers Mark
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Hi Gents, Danny, Thank you for your kind comments. Praise indeed from the Master.👍 John, I will send you a PM. Many thanks for your kind offer that I will take up please. Cheers Mark
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Not a lot done today, as I had to work again. 2 days in a row. I need a rest now. I did get F9 and F8 made up tonight. I'm hoping the wing plan is a bit more accurate than this fuselage one. The formers are all wrong. Some are too high, some too short, some too wide and some too narrow. Most are not drawn symmetrical and some of the cut-outs for the 1/4" spine are off to one side. I have taken to measuring from the build so far for the widths, using the side elevation for the heights and using the best looking side of the former drawing to cobble together the formers. The sides angle back at 8 degrees, the top rake is 6 degrees, I have split the difference and am sanding them at 7 degrees so that I don't have to change the setting on my sander. I'm going to strip some 1/8 and fill between the formers at the top to give the top formers a greater gluing area. There is some planking coming up shortly. Something I haven't done before. I'm both looking forward to it, and dreading it in equal measure. Cheers Mark
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Hi Andy, Sorry for that! I got a bit more done the last couple of days. Work got in the way though. I got the front and rear wing hold down plates epoxied in, it was good to see that the fuselage is pretty square: I ended up re-drawing out the plan straight onto my board, that way, at least the centre line is in the centre (it isn't on the plan) I then made up the rear formers by measuring from my plan with a pair of calipers for the widths and from the fuselage sides for the heights. I left them all a bit oversize on the bottoms so that I can sand them down to finish: Cheers Mark
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