kevin wild Posted February 15, 2011 Share Posted February 15, 2011 HIhere's my own design 700mm wingspan pusher 10mm epp ribs with carbon spar and 3mm depron skin 260watt brushless, 3s 1300 lipos and a 5x5 prop just under 1lb in weight and about 10oz/foot wing loading just waiting for the rain to stop for its first test flight Quote Link to comment Share on other sites More sharing options...
David Ashby - Moderator Posted February 15, 2011 Share Posted February 15, 2011 Very nice Kevin, welcome Let us know how it flies. Quote Link to comment Share on other sites More sharing options...
Tom Wright 2 Posted February 15, 2011 Share Posted February 15, 2011 Hi KEVIN Welcome looking at your photos i guess you have been aeromodelling for some time.Posting a profile heps other members to reply in context. Quote Link to comment Share on other sites More sharing options...
Biggles' Elder Brother - Moderator Posted February 16, 2011 Share Posted February 16, 2011 Hi Kevin, that's a cool model mate - very nice indeed. Don't forget to tell us how she goes. While I'm on, welcome to the forum. Its a pretty friendly place and you can find all sorts of info and advice - no matter how experienced we are we can all use a bit of help now and then. So don't hesitate to ask if you're looking for data or advice on some issue. If you have time drop in at the Pitts Cafe this is a thread with no topic so you can talk about whatever you want, post a music video or just enjoy the chat. Also take a look here where you will find useful stuff on how to use the various gadgets and facilities on the forum, things like: how to link to other sites, how to post pictures and videos etc. As Tom says it is helpful if you can fill in few details about your modelling experience in your profile and make it public. Its not compulsary, but it does mean that when folks are answering your posts they have an idea of the level you're at - it avoids sessions of "teaching your grandmother to suck eggs!" Hope you enjoy your time on here and once more - welcome on board. BEB Quote Link to comment Share on other sites More sharing options...
kevin wild Posted February 16, 2011 Author Share Posted February 16, 2011 well it flew It never ends well when a post starts that way does itI started with a safe c of g at about 12 percent Mac, range checked it and off she went like a scalded cat I climbed to hight and throttled back, i felt i was holding the nose up far too much, the c of g was very nose heavy, now here's the problem do you come in fast with elevator authority or slow ? i tried slow and it just sank, it was a controlled landing but heavy, with the field very muddy and exposed servos on the underside it stopped dead on contact, yep it ripped a servo out, well not the whole servo just the top half of it, the bottom half is still glued in lol it'll be the weekend now before i get a replacement and it'll be next week before i have a chance to try again with a more rearward c of g, i might move the servos up top too Quote Link to comment Share on other sites More sharing options...
kevin wild Posted February 17, 2011 Author Share Posted February 17, 2011 HI on closer inspection the servo was ok, it had just pulled the bottom of the casing off, i gave it a good check over, tested it with a load and all was ok i spent last night moving the servos to the upper wing surface and then put a bit of paint on it with the battery moved backward 10mm it was off to the common much better this time, i had a good 10min fly getting used to it and trimming it out and then landed, it still sank a bit on landing and i noticed the elevons were up by about 5 degrees i moved the battery back another 10mm and with another battery tried again, i had to trim the nose back down a bit but it was better again it's quite fast on full throttle, I spent most the time at just under half i reckon, the roll rate is fast enough for me but not mental, i was dabbing a bit of down in as she went inverted because the nose was dropping slightly, loops need full power and are pretty big i'd say about 80 foot dia, i haven't tried inverted yet on the 3rd flight i decided to try hi rates, the increased elevator was nice but the roll was too twitchy for me, i climbed to hight, throttled back and held in full up, she slowed to a snails pace and just sank like a delta should, no wing tipping at all one thing i've noticed is that she climbes (swoops) under full throttle, is it the c of g still too far forward ? i will try moving it back a bit more next time i'm pleased with the way it flies, i will try a bit of inverted next time too canopy painted white and a bit of black behind the nose Quote Link to comment Share on other sites More sharing options...
Simon Chaddock Posted February 17, 2011 Share Posted February 17, 2011 kevinWell built and flown. It is quite natural for a plane to want to climb as the power is added.As its speeds up its natural stability will try to keep the plane flying at the same speed so it climbs.The normal remedy is to set the thrust line of the motor such that as the thrust increases it also produces a nose down pitch to compensate. With a tail mounted pusher you need to add some up thrust. Delta wings tend to be quite sensitive in pitch so you may find it difficult to keep a natural neutral trim at all speed and power settings.A degree of climb with power is reasonable. One thing you don't really want is a full power nose down trim at slow speed when close to the round! Keep posting Edited By Simon Chaddock on 17/02/2011 21:54:09 Quote Link to comment Share on other sites More sharing options...
kevin wild Posted February 18, 2011 Author Share Posted February 18, 2011 Sounded like a good idea at the time !! no i haven't broken my plane, i was browsing the modelflying forum and came across a thread with video, one of the posts had a "brilliant" idea for doing your own video while flying no not one handed flying, just tie the camera around your neck and away you go lol i should have known it wouldn't have worked out of the 3min of video i managed before the camera battery died i think the jet is in frame for about 7seconds, that's 14 shots of it whizzing across the screen as i tiny black triangle I've uploaded it to youtube and edited all the rubbish out lol if you're realy bored and like whizzy little black triangles then hre it is Edited By kevin wild on 18/02/2011 15:52:59Edited By kevin wild on 18/02/2011 15:53:40Edited By kevin wild on 18/02/2011 15:54:07 Quote Link to comment Share on other sites More sharing options...
kevin wild Posted February 20, 2011 Author Share Posted February 20, 2011 better video courtesy of George my 11 year old co pilot thanks Quote Link to comment Share on other sites More sharing options...
kevin wild Posted February 22, 2011 Author Share Posted February 22, 2011 Hi just uploaded some build photos to my photo album Quote Link to comment Share on other sites More sharing options...
kevin wild Posted February 24, 2011 Author Share Posted February 24, 2011 any one think of a name for it?. I will probably draw up a plan and stick it online for free download, so it needs a name bless it Quote Link to comment Share on other sites More sharing options...
Wingman Posted February 24, 2011 Share Posted February 24, 2011 It's really bonny! How about VULCANO or maybe CONCORDIA Quote Link to comment Share on other sites More sharing options...
kevin wild Posted February 24, 2011 Author Share Posted February 24, 2011 I like Vulcano : -) Quote Link to comment Share on other sites More sharing options...
Wingman Posted February 24, 2011 Share Posted February 24, 2011 Quote Link to comment Share on other sites More sharing options...
Big Bandit Posted May 12, 2011 Share Posted May 12, 2011 Hi Kevin, really like it .Cheers,Chris. Quote Link to comment Share on other sites More sharing options...
kevin wild Posted May 12, 2011 Author Share Posted May 12, 2011 Thanks it scares the poop out of me every time i fly it, think i'm getting too old for small fast models kev Quote Link to comment Share on other sites More sharing options...
Lindsay Todd Posted May 12, 2011 Share Posted May 12, 2011 Nice one Kevin looks cool, or is it red hot with a name like Vulcano Quote Link to comment Share on other sites More sharing options...
Stephen Jones Posted May 14, 2011 Share Posted May 14, 2011 Hi Kevin , That looks really good almost space shuttle with them colours , futuristic jet fighter , How about stealthy . P.S i like fast models Quote Link to comment Share on other sites More sharing options...
kevin wild Posted October 16, 2011 Author Share Posted October 16, 2011 Hi I've redesigned my jet 6mm depron instead of 10mm epp larger elevons twin rudders battery compartment for bigger batteries should be much easier to build too. I've already done quite a bit so I'll post some picks soon ATB kev Edited By kevin wild on 16/10/2011 22:03:14 Quote Link to comment Share on other sites More sharing options...
kevin wild Posted October 17, 2011 Author Share Posted October 17, 2011 Hi the lower wing sheet is now 6mm depron. all the ribs are notched and self locate in the correct position the 8mm spars are then glued in and this pulls the wing skin into shape the depron spars and false leading edge can then be added on the old version the epp fins glued straight on to the top wing sheet. I've gone for fin supports this time within the wing. I did manage to snap one off in the garage once the fuselage and canopy were solid epp on Mk1. it's all built up for Mk2. the canopy has a 6mm frame side sheeting is then added and sanded flat along the top the top sheet is then glued on and its ready to sand I've drawn up some sanding templates to make sure i don't over sand it and make it too thin Edited By kevin wild on 17/10/2011 15:21:00 Quote Link to comment Share on other sites More sharing options...
kevin wild Posted October 17, 2011 Author Share Posted October 17, 2011 The fins on Mk1 were 10mm epp and not rigid enough to support the stresses of rudders so a 3mm balsa spine is sandwiched between 2 3mm skins on Mk2 after the balsa is glued to the one sheet fury Ca hinges are glued to the depron. the second sheet is then glued on and when dry the edges are pinched in to give a symmetrical section. the top and leading edges are simply sanded round the fins will be glued in after the top 3mm skin is in place Edited By kevin wild on 17/10/2011 15:33:13 Quote Link to comment Share on other sites More sharing options...
kevin wild Posted October 17, 2011 Author Share Posted October 17, 2011 The fuselage is now built up. it's a minimum of 12mm wall thickness and feels very solid so I'm hoping it'll take a few knocks a simple box section with alignment tabs is first then the skins are added one at a time. because the battery will be larger and further back it's left the nose empty. I'm going to put my Rx up front well away from the esc but it could be buried in the wing to save extending all the servo wires bottom skin and upper former in place top skin added the outer skins are then glued on ready to sand Quote Link to comment Share on other sites More sharing options...
kevin wild Posted October 17, 2011 Author Share Posted October 17, 2011 I've rough sanded the fuselage. need to make some templates to finish it. it's a round section along the length so not too difficult to get it looking good trial fit. the nose locates on three tenons and should auto align itself the tenons are shown here. one large one at the bottom and small ones either side Quote Link to comment Share on other sites More sharing options...
kevin wild Posted October 19, 2011 Author Share Posted October 19, 2011 Trial canopy fit the canopy locates in the two slots on top of the fuselage. the underside of the canopy needs to be sanded to suit the top of the fuselage. I've drawn a green line to show the extent of the sanding Quote Link to comment Share on other sites More sharing options...
kevin wild Posted October 23, 2011 Author Share Posted October 23, 2011 HII've spent most of today tinkering with the rudder torque rod setup. with the rudder linkages hidden in the wing it seems a pity to mount the elevon servos as i did on the original. do any of you have experience of using the torque bar method on elevons ? I've seen this setup on youtube demonstrated but wonder if it's practical for my elevonsI've drawn it up and the servo will just fit under the wing skin if a move it in between the spars the rear carbon spar has been hidden in the image and the elevon top skin made transparent. the servo (dark red) turns a torque rod (pink) that runs freely in a ply box in the elevon. the amount of bend in the torque bar is set to give the correct amount of movement questions ???? is this setup good enough for a high speed model ?can a nice slop free movement be achieved ?how thick does the torque bar need to be ? rudder setup Edited By kevin wild on 23/10/2011 22:02:49 Quote Link to comment Share on other sites More sharing options...
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