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Old 01-11-2017, 09:03 AM   #1
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Default Sophisticated Lady elec conv and mods.

Building an old Sophisticated Lady kit. Will have a nose mounted elec motor.

Built and flew a GL many years ago. Tweaked that and as I recall reduced decalage by shimming up the TE of the wing and also moved the CG back a good amount from plan location. Ended up being an awesome thermal sniffer. Nearly lost it several times...

So... I am building the SL with a conventional tail instead of the t-tail as designed. If I lay the stab directly on top of the fuse, it is about -1.5 to the wing, according to the plan sheet. I'm tempted to leave it there given my prev. experience with the GL. The stab is already sanded with a bit of neg camber as well.

All my tweaks on the GL were seat of pants, and long ago. Anyone with experience on either of these particular models that cares to critique this plan??
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Old 01-11-2017, 09:19 AM   #2
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Some pics off current progress...
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Old 01-11-2017, 09:28 AM   #3
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Well never mind images for now. Site wont accept them direct from my phone as is and I can't take lower res shots right now. It's just a built up balsa wing and fuse/tail. Nothing special, or maybe it is nowadays...
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Old 01-11-2017, 09:29 AM   #4
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I'll try some new pics tomorrow.
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Old 01-12-2017, 01:34 AM   #5
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Good little project....Subscribed.....
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Old 01-12-2017, 04:16 AM   #6
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Pics...

I extended the LE of the fin down to intersect the bottom sheeting. Changed the shape of fin and rudder to accommodate the fuse mounted stab. Will add dorsal and tri stock to reinforce once the tail group is glued.

Any opinions on the decalage change?? Fuse build so far was 100% focused on being square and true between wing and tail. The nose will also be once I finalize the power system. Nose as designed is too narrow for a motor so the #1 former will be a bit wider.

I hate the idea of trying to cut/sand a +/- 1* shim for the stab as the fuse top is perfect flat relative to the wing saddle right now.


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Old 01-12-2017, 06:28 AM   #7
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Stacking up all the various kit supplied hardware and wood left to finish it, and estimated covering weight, airframe should come in around 18oz.

Pretty confident it will be less as that was with various parts in bags and more wood than will actually be used.

That leaves me 8-10 oz for electrics, which should be easy, to keep within the weight spec as a pure glider. Placing as much of the weight under the canopy as possible, even if it means leaving out the dummy pilot😀
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Old 01-12-2017, 08:22 PM   #8
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Nice job so far.....
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