Richard Harris Posted October 24, 2011 Share Posted October 24, 2011 Kev, I know nothing about whether the torque bar will be strong enough? but I would try to get the least amount of flex as possible in the system. One thing that someone did say to me once was to seal the hinge lines top and bottom with tape etc this apparently reduces and helps eliminate flutter, how true this is I have no idea. That's a cracking design and very well thought out, what programme are you using, solid works? I would be more than happy to build one if you ever create some plans Rich Quote Link to comment Share on other sites More sharing options...
kevin wild Posted October 24, 2011 Author Share Posted October 24, 2011 Quote Link to comment Share on other sites More sharing options...
kevin wild Posted October 28, 2011 Author Share Posted October 28, 2011 Hi I've done a bit more added some servo boxes sanded the trialing edges of top sheet glued on the top sheets added the leading edge strips cut out the fin slots dry fitted the fins and tested the rudders Quote Link to comment Share on other sites More sharing options...
Vecchio Austriaco Posted October 28, 2011 Share Posted October 28, 2011 Hi Kevin, phantastic design and a great build description. Congratulations VA Quote Link to comment Share on other sites More sharing options...
kevin wild Posted November 1, 2011 Author Share Posted November 1, 2011 Hi I've made up some sanding templates for the leading edges and had a go at one of them also sanded the bit that meets the fuselage. the fuz fits ok but i might put a bit of filler around the joint Quote Link to comment Share on other sites More sharing options...
kevin wild Posted February 5, 2012 Author Share Posted February 5, 2012 Hi I've been a bit busy building flying and repairing indoor stuff lately so this project went on hold for a bit, the weather being poo doesn't help either on the couple of good days we've had this year i've popped outside to finish sanding the fuz and shaped the elevons it's nearly there I've got to put a bit of colour on so i can tell which way is up. make a latch up for the battery hatch and glue the fins on hopefully fly sometime this week Quote Link to comment Share on other sites More sharing options...
Erfolg Posted February 5, 2012 Share Posted February 5, 2012 Kevin A very impressive exercise in solid modelling. Which package did you use? Is it a professional package? Is it based on primitives, extrusions etc.? How long did it take to generate the CAD Model? Quote Link to comment Share on other sites More sharing options...
Cyclicscooby Posted February 6, 2012 Share Posted February 6, 2012 As above... Very nice exercise in modern design n build techniques.. Way above my technique of tracing my monitor with good ol' pencil n tracing paper.. !!! I love the way you can design a 3d structure in an interlocking way, you'd have a nightmare doing with normal methods.. Love to know what software you're using... Are you a draftsman by trade / training, or have you just picked it up.. What i'm asking is, wether I could figure it out, or is it mind-numbingly complicated.. ??? After the post the other day, regarding wether 'foamies' are proper models, I guess you've just proved that they are.. Luv Chrisie.. xx Quote Link to comment Share on other sites More sharing options...
kevin wild Posted February 6, 2012 Author Share Posted February 6, 2012 Hi I've been messing around with turbo cad and other packages for about 20 years, i'm not a draftsman by trade but I've done quite a bit of 3D modeling from customer drawings over the years using industrial packages the wing solid was built up from surfaces then cut up , it was a real head ache to be honest and I've put in hundreds of hours on this project the interlocking parts were all manually adjusted, sorry no easy route in the software I've just spent about 4 hours slapping some acrylic paint on it to make it look pretty just waiting for the 2 inches of slushy snow to melt away and the fog to clear and it'll be off it's green and very dark purple believe it of not. i did test the paint on a bit of scrap depron but it came out much darker then expected Quote Link to comment Share on other sites More sharing options...
Stephen Jones Posted February 19, 2012 Share Posted February 19, 2012 Hi Kevin , Any news on the test flight yet ? Quote Link to comment Share on other sites More sharing options...
kevin wild Posted February 27, 2012 Author Share Posted February 27, 2012 Broke it the test flight didn't go well it torque rolled so much on the hand launch i couldn't correct it and it knife edged into the ground the nose broke off. the motor broke loose and near enough chopped the left elevon in half i've glued the nose back on but still have to sort out the elevon I've increased the battery size from 1300 to 2200mah from Mk1 so the weight has gone up a bit. also the extra power from the bigger battery probably gave me a few more revs. Mk1 used to torque roll on launch too but not as badly when i get it fixed i'll be launching it on full rates and anticipating the roll i hope i catch it next time kev Edited By kevin wild on 27/02/2012 12:46:44 Edited By kevin wild on 27/02/2012 12:48:36 Quote Link to comment Share on other sites More sharing options...
Erfolg Posted February 27, 2012 Share Posted February 27, 2012 I observed a Kryton pile in on launch on Sunday. Being EPP there was no damage. The problem in that case was that it was launched on full rates and full power. It was apparent later, that the model would fly at walking pace. There was no need for full power. Perhaps that if you tried half power, it would give more time to sort out the models trim. Quote Link to comment Share on other sites More sharing options...
kevin wild Posted February 27, 2012 Author Share Posted February 27, 2012 Posted by Erfolg on 27/02/2012 14:52:35: Perhaps that if you tried half power, it would give more time to sort out the models trim. that sounds like a good idea thanks Quote Link to comment Share on other sites More sharing options...
Stephen Jones Posted February 27, 2012 Share Posted February 27, 2012 Sorry to hear about the model . i too have crashed models on their maiden flight due to hand launch its a bad thing sometimes as you can not get youre hands on the sticks quick enough after the launch to correct it . Are you alone flyer or could you enlist a helping hand . Mind you sometimes that can be just as bad if the guy throwing it is no good . Lets hope its not the end for it . Quote Link to comment Share on other sites More sharing options...
Erfolg Posted February 27, 2012 Share Posted February 27, 2012 I know what you mean Stephen. The issue is often compounded by not knowing precisely how to set up the model. Typically, is any up elevator required, How much throw. on all surfaces Flying wings and deltas have their own problem. That is how much reflex to set the trailing edge. All is initially a judgement. I had a very personal experience this week end. I transferred a model from my 6ex to my 8fg. Dead simple. I just set everything up to identical settings as the old Tx. The first couple of circuits was spent with a lot of right aileron and up elevator held in. Slowly I sorted out the trims, first the right turn,which became slight left, until it was finally flying well. In principal, there should not have been any issues. Own design and first flights are potentially challenging events. As suggested a hand launch by a helper is essential. A sharp left turn (or right), climbing steeply or diving, may lead to the model piling in, if you have not got back to the stick. Quote Link to comment Share on other sites More sharing options...
kevin wild Posted March 15, 2012 Author Share Posted March 15, 2012 Oh dear right then I glued it all back together and then left it sulking in a corner for a while... conditions were perfect. I decided to launch on half power down a bit of a slope.... you know what's coming . yep the slope wasn't enough. the nose dug in and snapped off I will glue it back on (again) and try a dolly kev Quote Link to comment Share on other sites More sharing options...
Stephen Jones Posted March 15, 2012 Share Posted March 15, 2012 Oh dear Kevin , A big boy like you and you have too go sulking of in a corner with a Dolly . Mind U how many men admit to playing with dollys . Opps wrong kind of Dolly`s Sorry kevin . I have to admit here to using dollys ..................................... too Launch my aircraft Or better still i use a catapult on a launch pad which allows me to have both hands on the controls while my foot releases the catapult . Good Luck hopefully 3rd time lucky Quote Link to comment Share on other sites More sharing options...
kevin wild Posted March 20, 2012 Author Share Posted March 20, 2012 Posted by Stephen Jones on 15/03/2012 19:59:39: Oh dear Kevin , A big boy like you and you have too go sulking of in a corner with a Dolly . Mind U how many men admit to playing with dollys . Opps wrong kind of Dolly`s Sorry kevin . I have to admit here to using dollys ..... Lol Quote Link to comment Share on other sites More sharing options...
kevin wild Posted March 21, 2012 Author Share Posted March 21, 2012 Hi the damage was a little bit more than I first thought. the nose hit the ground and dug in. as it snapped off it must have kicked to the right because the leading edge and underside had been compressed in. so when i came to glue it back on it didn't fit very well. I've ended up cutting out sections on the fuz side leading edge and fuz belly to let in fresh pieces of depron. I must say that it's very easy to reair depron just got to repaint it and build the dolly kev Edited By kevin wild on 21/03/2012 10:12:30 Quote Link to comment Share on other sites More sharing options...
Simon Chaddock Posted March 21, 2012 Share Posted March 21, 2012 Kevin Just out of interest how much does it now weigh? Or to put it another way is the wing loading higher than the Mk1? Quote Link to comment Share on other sites More sharing options...
kevin wild Posted March 26, 2012 Author Share Posted March 26, 2012 Hi it now weighs 575g 1.27lb so it is a bit fatter I've built the dolly now so it's third time lucky kev Quote Link to comment Share on other sites More sharing options...
Stephen Jones Posted March 26, 2012 Share Posted March 26, 2012 That looks good , What is it made of how heavy is it , how big are the wheels ? Please . Edited By Stephen Jones on 26/03/2012 20:41:49 Quote Link to comment Share on other sites More sharing options...
kevin wild Posted March 27, 2012 Author Share Posted March 27, 2012 Hi it's made of 5mm (depron) laminate flooring underlay. 15mm pipe lagging and 38mm waste pipe the wheels are 70mm i think. not sure how heavy it is but it feels very solid fingers crossed Quote Link to comment Share on other sites More sharing options...
Stephen Jones Posted March 27, 2012 Share Posted March 27, 2012 Good Luck , It certinaly look up for the job Quote Link to comment Share on other sites More sharing options...
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