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    Wing Spar - design / bonding pultrusions

    As a proud englishman I am sad to have to say two things: 1. The French design some VERY nice aeroplanes. 2. It's really embarassing I don't speak much French - why does wingtip auto-translate to 'salmon'?
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    Wing Spar - design / bonding pultrusions

    Thank you everyone - super-helpful as always. Adding about 200g of foam makes my whole spar design really, really simple to build. I really love the Gazaile 2 but the way the wing joiner hardpoints are made always surprised me - obviously it works, and is really simple but it seems sort of...
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    Wing Spar - design / bonding pultrusions

    Do you mean phenolic instead of the ply?
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    Wing Spar - design / bonding pultrusions

    And this for the spar overlap - full width foam with ply hardpoints with brass bushings all wrapped in a lot of carbon to take the large shear loads between the pins. Assemble wings on jig, line everything up, drill slightly oversize, insert bushings with a lot of mumpe and pins in place, wait...
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    Wing Spar - design / bonding pultrusions

    So something more like the attached? 10mmx1mm pultrusions pre bonded for the cap, 10mm thick core running full depth and all wrapped in a single bit of carbon (more wraps of carbon where needed). I'd not seen the KR Super 2 website before - that's got some interesting stuff!
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    Wing Spar - design / bonding pultrusions

    I have a quick question: is the attached basically the best / most foolproof way of doing things? Red - Pultruded carbon strip spar cap already bonded. Green - PVC Foam Black - continuous wrap of carbon overlapping for an inch or so in the middle of the shear web. And also -bonding pultruded...
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    Fisher Flying Products Announces New Electric Propulsion Systems

    As someone that flies gliders in the very fickle conditions of the UK the idea of e-soaring is a very attractive one. There's always a gap that's a bit too big even with my 40+ to one glide ratio. That's before you hit the inconvenience/potential danger of not getting home.
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    QC Question...

    And as to the what's and why's... Putting fully extended brakes away also puts the 15 degrees of flap away. Which I didn't consider while trying to arrest my excessive sink rate. Good job it's a grass field or there'd be more than just the seat pan to fix! I try to make these mistakes just the...
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    QC Question...

    Thanks everyone. Had to start over! Failed to seal the back properly and air displaced resin around the original crack (sanded to almost nothing). Would have been fine if I was sensible and just did an open layup. Your replies are almost like a textbook that opened at exactly the right problem...
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    QC Question...

    Opinions wanted please! Does this repair look resin starved or fine?
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    Exian's composite planes

    These are things of beauty! Well done! MOre pictures of construction please as it's all both inspirational and informative.
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    Refinishing gliders

    Or there's something like this to maybe add a few years: http://soaringcafe.com/2014/04/how-to-sand-your-glider/ plus some more aggressive sanding to the leading edge where the gel has blistered all along the glue line. I suppose I should take some photos...
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    Refinishing gliders

    Yep - my London is in England! There are loads to choose from - Poland, Slovakia: http://refinish.pl/ https://www.gliderservice-novak.si/ Just wondering if anyone has personal experience // done some of it themselves. Plenty of very nice looking refinished gliders around the club so been...
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    Refinishing gliders

    Mine's getting a bit close to that time I think (LS6A 15m). I could have a crack at doing the leading edges and the tailplane myself to add a few more years onto it but then I could just get the whole thing done properly... Anyone had this done recently & got ballpark figures for cost / a...
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    CNC Foam cutter

    This thing is strictly for milling wood and foam - anything beyond that and I'd need to re-design it to be sturdier. For vinyl do you need a drag knife? I guess I now need to learn fusion 360 so I can output some nice Gcode.
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    CNC Foam cutter

    The foam cutter is now also a milling machine! Or at least it will be when I replace the sharpie with a router.
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    Matty's Marvelous Modular Monstrosity

    Two elevator halves ready for whatever the next bit of the process might be. I suspect it's trimming, joining, wrapping some more bi-ax over the join area, cutting out some bits for hinges, filling, sanding, painting, mass balancing... Basically done then! 490g each which is sort of about right...
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    &%%##^* Splines!!!

    Draftsight is quite limited re. Splines from what I've seen but getting a decent result is not too difficult and the program overall is really good IMO. AutoCAD knocks it into a cocked hat though and you can get it for free by clicking the 'i'm a student' button (and who here isn't a student...
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    Is electric flying safe today ?

    You'll never believe what happens when you set light to gasoline! Especially if you sort of spray it about a bit first... I really don't understand the hysteria re. Lipos. They're fine IF DESIGNED, MADE & TREATED PROPERLY. Same as gas. Different challenges sure...
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    Wing Locating Pins & Main Pins & Spar caps.

    And here's some nice drawings from the LAK 17 manual. Pins are in the fuselage going into fittings in the wing root.
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