john stones 1 - Moderator Posted May 17, 2014 Share Posted May 17, 2014 I have a 1100 kv 210watt motor, 30 amp esc and 3cell 2200 lipo's. I would like to make a glider to use them in, the aim is a bit of thermal and mildly aerobatic, I don't want to buy one, the build is part of the fun. What size glider plan should I be looking for ? 2lbish 70 inch am I anywhere near ? John Quote Link to comment Share on other sites More sharing options...
Simon Chaddock Posted May 17, 2014 Share Posted May 17, 2014 John 2llb ish? You might find by the time you have added up battery, motor, ESC, servos, snakes, radio etc there is only 1lb ish left for the airframe. If you are designing it as well as building it might need some care in the detail to have a good glide performance and adequate strength for any aerobatics but it can certainly be done.. Quote Link to comment Share on other sites More sharing options...
Mark Kettle 1 Posted May 17, 2014 Share Posted May 17, 2014 John this would be ideal for your power set-up it's a plan in next months RCME - July mag mid to early June time. blog on here in Features - plan builds models - called Red Kite 2 mtr span Video here : on page 2 - date 4th of March down within the blog would be good. Edited By Mark Kettle 1 on 17/05/2014 21:14:21 Edited By Mark Kettle 1 on 17/05/2014 21:15:26 Quote Link to comment Share on other sites More sharing options...
Mark Kettle 1 Posted May 17, 2014 Share Posted May 17, 2014 type this in the search box top right John : E-Glider new design called RedEagle Edited By Mark Kettle 1 on 17/05/2014 21:19:23 Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted May 17, 2014 Author Share Posted May 17, 2014 I don't think I explained it very well there fella's, my 2lb ish came from what I thought the motor capable of (not sure if that's correct). I only want motor to gain height with, mild aerobatics will be throttle off. You're right Simon I don't have a lot left after motor etc. so would this set up work on a 3lb glider ? I will have a look at that Mark thanks John Quote Link to comment Share on other sites More sharing options...
Bill_B Posted May 17, 2014 Share Posted May 17, 2014 It'd cope easily with a 3lb glider, even a wee bit heavier perhaps if you only want it to gain height gently. Quote Link to comment Share on other sites More sharing options...
PatMc Posted May 17, 2014 Share Posted May 17, 2014 John, what motor is it that you have ? I fly a 2.5 metre Reichard Classic that weighs 70oz on 300watt (69watts/lb) without any problems. It climbs briskly & capable of most aerobatics. Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted May 17, 2014 Author Share Posted May 17, 2014 Had a look Mark thanks, looks good but would maybe like ailerons Pat its a Turnigy d2830/11...1100kv, I had a 10 ft glider 30 odd years ago, all bungee launch, I am still a novice with electrics so have no idea what size glider this would fly. John Quote Link to comment Share on other sites More sharing options...
PatMc Posted May 17, 2014 Share Posted May 17, 2014 John, it's quite a small motor, only weighing 52g. According to the HK spec it will take 21A but I suspect that might be for short bursts, which is fine if you only intend to use full power for something like 30 secs then glide. Probably best to run the motor with whatever size prop you intend to use for 10secs, 20secs then 30secs checking the current stays within the limit & feeling how hot it gets after each run. For a 70"-ish model that's intended for aerobatics I'd be inclined to use a heavier motor around the same Kv. I have a 130g Turnigy 3542 100Kv in my EasyGlider which weighs 34oz but that will climb to 800ft in 30secs doing consecutive rolls on the way up. Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted May 17, 2014 Author Share Posted May 17, 2014 Cheers Pat I know its not got much power i'm just being cheap if im going to do the job best do it right. Its not much for a new one anyway. I may buy another later, I fancy a twin as well. John Quote Link to comment Share on other sites More sharing options...
Frank Skilbeck Posted May 18, 2014 Share Posted May 18, 2014 To put it into perspective, my old Sonata E was around 72" wingspan and it flew on a brushed 600 with a 6 cell Nicad battery, say 120w on a good day. Yes the climb out was rather gentle. so a 3 lb glider on a 210watt system should be fine. Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted May 18, 2014 Author Share Posted May 18, 2014 Thanks folks I think I will draw one up 70 inch, keep it light and simple, and allow enough room to uprate the motor if needed So what do you think I need incidence wise, tailplane and wing ? Zero on tail ? +1 on wing ? I have done quite a few home builds, never done a glider though. The aim is to fly throttle off mostly, motor's just to gain height. So am I anywhere near or talking rubbish John Quote Link to comment Share on other sites More sharing options...
Chuck Plains Posted August 3, 2014 Share Posted August 3, 2014 How did it go John? Did you build it and chuck it? I would have thought that zero all round would be a good starting point. My old Easy Pidgeon was apparently zero incidence (wing to fuse angle) and zero declage (wing to tail-plane angle) After I made up some flat aileron + flaps 2.5mtr wings with simple folded foam, I did mess about with it. Mostly as although the wings were quite a bit heavier than the original 1.8mtr balsa polyhedral ones, they seemed to improve lift dramatically and caused 'balooning'. But I can't tell you about angles, because I just added about 2.5mm of plasticard under the front of the wing. Hmm, hang on a mo, lemme see, that's a 185mm chord x 2.5mm gives less than one degree incidence. I guess it helped as I was able to get the elevator within a couple of clicks of being flat to the tail-plane while maintaining level cruising flight at less than half power. Contrarywise, my ancient Precedent Hifly glider (£15 off Ebay) has something like +3deg Wing to fuse and +2(ish)deg declage. I think it was made that way for bungee or towing as it came with a tow hook underneath. In spite of all that malarkey, I need to mend both of them. Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted August 3, 2014 Author Share Posted August 3, 2014 Not started it Chuck, I needed a break from building am reverting to plan B now....buy wood for my Chippie at Nats and if I cant find something suitable on the Sunday table top sale, buy wood for a glider as well. One or two nice Gliders at our club I can copy if it comes to it. I don't mind building two at a time you can work on one as glue dry's on the other John Quote Link to comment Share on other sites More sharing options...
Gary Manuel Posted August 3, 2014 Share Posted August 3, 2014 John, That's an identical electrical setup to my Phoenix 2000 and that has plenty of power for climbing. You should be fine with a 70 inch span. Quote Link to comment Share on other sites More sharing options...
Gary Manuel Posted August 3, 2014 Share Posted August 3, 2014 John, Build a 5m motorless one and I'll get Dusty to give you a tow Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted August 3, 2014 Author Share Posted August 3, 2014 You build it i'll fly it John Quote Link to comment Share on other sites More sharing options...
Chuck Plains Posted August 4, 2014 Share Posted August 4, 2014 Posted by john stones 1 on 03/08/2014 15:14:26: Not started it Chuck, I needed a break from building am reverting to plan B now....buy wood for my Chippie at Nats and if I cant find something suitable on the Sunday table top sale, buy wood for a glider as well. One or two nice Gliders at our club I can copy if it comes to it. I don't mind building two at a time you can work on one as glue dry's on the other John Hehe, you say you need a break from building, then point out that you're a glutton for punishment! Tabletop sale? Now that's my sort of solution! Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted August 4, 2014 Author Share Posted August 4, 2014 Having a break till October Chuck then i'm off on a course in scale building Looking forward to it, I can tell you John Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted August 5, 2014 Author Share Posted August 5, 2014 Is it worth building one I now ask myself Dragonfly glider from H.K, composite fuzz built up wing and comes with motor, which just happens to suit my stock of 2200mah lipo's. Price £60 Anyone had one, are they O.K ? John Quote Link to comment Share on other sites More sharing options...
Chris Barlow Posted August 5, 2014 Share Posted August 5, 2014 Looked at that one a few times, then decided I wanted a full house glider, realise how much they cost & decide to save up! Then I start looking at HK gliders again and the cycle continues! Quote Link to comment Share on other sites More sharing options...
Keith Berriman Posted August 5, 2014 Share Posted August 5, 2014 I have one of these and can only get a 1300 3S cell in, I do not know how they get a 2200 in I have had to modify the canopy to fit on stand offs also. I have a 28mm brushless up front with a 10 x 6 on and it fly's very fast, I have not mastered how to get it round corners as it wants to fall out of the sky and troublesome to get it to fly straight and level again. I do not want to dissuade any potential buyers it maybe just be me ?? Quote Link to comment Share on other sites More sharing options...
Jamie sawyer Posted August 5, 2014 Share Posted August 5, 2014 I was looking at those gliders last night drooling and raeding the reviews and to be honest the reviews on the gliders are some what off putting to say the least with people breaking wings doing normal turns and then repairing the wings to find its soft balsa that they have used and the main spars being under sized by far!! Plus there was discussions about the fuselages being twisted. There lovely to look at but it sounds like its a lottery if you get a good one. Read the reviews John.....its good ( Bad ) reading Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted August 5, 2014 Author Share Posted August 5, 2014 You might have dissuaded me slightly there RC PF to be honest I don't like buying kits without viewing first anyway. Back to the table top option I reckon John Have done so Jamie, back to plan B cheers Edited By john stones 1 on 05/08/2014 19:40:19 Quote Link to comment Share on other sites More sharing options...
Gary Manuel Posted August 5, 2014 Share Posted August 5, 2014 John, Don't ignore this - They are a bit common these days (for a reason) but the price is rediculously low for what you get. You have all the right gear for it. **LINK** One of these will take a full-house setup and would be good practice for Taranis programming! Quote Link to comment Share on other sites More sharing options...
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