Martin Fane Posted October 12, 2014 Share Posted October 12, 2014 Danny Thanks for the clarification, I think I see what you mean now - the lines allow you to attach the lower spar to the joiner at the correct dihedral angle. Then complete the outer panel basic structure (ie LE and TE) flat on the board (the centre joiner will be angled up in the air) Once the outer panel is complete, release from the board to get the centre joiner flat, then complete the centre section. Complete sheeting etc on each section flat on the board Would you recommend fitting both left and right lower spars to the centre joiner at the same time or complete one side at a time as far as possible ? Good spot regarding the wing training edge, I had a look for Brian Taylors big Chipmunk but cant find a picture showing the wing area: http://www.modelairplanenews.com/blog/2011/07/09/brian-taylors-dhc-1-chipmunk-close-up-flightline-walk-around/ And this really nice Nationals 2011, 3rd placed model - looks to me like the TE is straight with just the aileron notched (not absolutely sure as the photo blurs when enlarged): http://www.baesmac.co.uk/club_news/RC_Power/Nats_2011.htm Quote Link to comment Share on other sites More sharing options...
Tony Bennett Posted October 12, 2014 Share Posted October 12, 2014 looks an interesting build Danny. nice and simple until you get to the rivets. and panel lines. still debating how to do mine. Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted October 12, 2014 Author Share Posted October 12, 2014 Hi Martin you can write my blogs, i will just post the pics you are spot on with the process i used. Whether there is a better way i dont know but this way has resulted in a lovely straight wing and the centre section is all aligned too. You may be right just fitting the lower spar to the doubler might be easier.CheersDannyPs i have lots of pics of both Brian's and Dave's Chippys I will take a look later but knowing those guys they wouldnt miss something so fundamental. This plan is fairly old. Remember a Corsair with none retracting U/C won the Nats around this time Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted October 12, 2014 Author Share Posted October 12, 2014 The panel lines, rib tapes and rivets will be the easy bit!I am sure you could whistle one of these together during a tea break CheersDanny Quote Link to comment Share on other sites More sharing options...
Martin Fane Posted October 12, 2014 Share Posted October 12, 2014 Danny Sorry didn't mean to hijack your thread, just wanted to get things clear in my tiny brain. Regarding the open structure for the rudder tip - looks like the elevators are the same from one of the previously uploaded photos ? Or has this been mentioned elsewhere ? On another subject what are your plans regarding aileron / flap servos ? I was thinking of individual aileron servo's and just one for flaps - what do you think ? Keep up the great work. cheers Martin Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted October 12, 2014 Author Share Posted October 12, 2014 Martin you are not hijacking the thread, the chat and banter is something I really enjoy about this forum. So please don't apologies I have a plan for the rudder top, that doesn't involve removing the wood. The rudder could become quite fragile and susceptible to hangar rash without the section at the top. You lot are so impatient! My idea was to sand shallow hollows in the balsa and perhaps add some stringers to highlight the rib positions. I will revisit this later, as I will the elevator trim tabs. But please feel free to experiment with your own ideas. As we have always said there is no right or wrong way to do things. I am not sure about the elevator tips, we need a close up piccy. I can see rib tapes but the fabric just doesn't look angled like a ribbed structure. As far as servos, the forum is split here. I am going for bell cranks and two servos, one for flaps and one for ailerons. Most are going for separate aileron servos. Again no right or wrong way, but with a central servo no servo access is required. Keep the questions coming, its no trouble. Decembers Column is written so I can get back to the Chippy Shame I am missing my chums at Ashbourne, weather looks great too. Do a low pass for me guys! Cheers Danny Quote Link to comment Share on other sites More sharing options...
David P Williams Posted October 12, 2014 Share Posted October 12, 2014 Can't find a real close up apart from this, and the quality is poor as it's scanned from a printed photo. From memory, the elevator tips are metal covered, at least the forward part, as it contains a mass balance weight. Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted October 12, 2014 Author Share Posted October 12, 2014 No I agree, it should have a counterweight in it so will probably be an aluminium cover it appears to be fabric covered still. Cheers Danny Quote Link to comment Share on other sites More sharing options...
Nev Posted October 12, 2014 Share Posted October 12, 2014 Oh we are still watching believe me but I'm way off the wings so it's all bookmarked for later. DIY for me this weekend so it could be a lot later. The step in the shroud doesn't look that big and yes building deeper flaps would be a step too far, at least for me. Couldn't you just make the shroud slightly smaller over the flap section, at least over the top, to simulate a deeper flap. I admit I haven't had any time to look at this properly. Great build on the wings so far. Nev. Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted October 12, 2014 Author Share Posted October 12, 2014 Hi Nev, I think the size of the flap will have a bearing on this, if the gap between the shroud and flap is poor it will just look wrong, whereas if you leave the step off nobody will know, except the odd Chippy anorak. Don't worry nobody is following the threads Right just for you guys I am building the second wing in the same manner as you would normally, lets see what happens.... By the way, I have a reversed copy being printed by a friend, but I don't think he realised how quickly I would need it It is after all day 12 and I am on wing 2 Anyway I taped the plan to the lounge window and spent half an hour transferring the lines to the other side to make a mirror copy. I really think this is a poor show on behalf of plan printers, include an extra sheet for an extra quid please...... The first thing I realised was I needed to add the feet to the ribs, so had to lift the plan and protective film etc from the board to turn it over... GRRRRR! Cheers Danny Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted October 12, 2014 Author Share Posted October 12, 2014 Here you can see just how delicate the structure is without the leading and trailing edge pieces nore the centre section doublers. If you know it all fits then you are okay. But if you are not sure this is a big gample. They fitted on the other side so I am confident.... sort of Fitted the trailing edge 1/8 sq section, using an engineers square to ensure they were perpendicular to the plan. This meant a few very small gaps at the backs of the ribs. This will not be a problem as the rib cappings will bridge the tiny gap. And it is only on a few ribs. This willl ensure that the 1/8 full height trailing edge, has a good straight surface to bond to. Once the trailing edge was done then we could do the leading edge as on the other wing. *Note* make sure you do the trailing edge first, as those ribs without jigging tabs (the odd numbered ribs in my case) will not be alligned until the trailing edge goes on. If you want to be really safe fit jigging tabs to ALL ribs Is anybody else building? Seems very quiet... I hope the wing hasn't stunned you all into silence LOL its not that bad honest Cheers Danny Quote Link to comment Share on other sites More sharing options...
G-YRUS Posted October 13, 2014 Share Posted October 13, 2014 I think I must live on another world. I cant even keep up with the thread so building at this rate is silly. I will follow along but as for being part of the build I just cant see it happening. Quote Link to comment Share on other sites More sharing options...
Tony Bennett Posted October 13, 2014 Share Posted October 13, 2014 i'm watching even if i am not doing anything. nice jigging young man. Quote Link to comment Share on other sites More sharing options...
Terry Walters Posted October 13, 2014 Share Posted October 13, 2014 Hi Danny - I'm still here and will get a bit more done this week but on Friday I'm back to the UK for a whole week so won't be able to do anything more until I return! I shall be reading the blogs tho' so keep up the good work all of you Chipites! When I get back it'll be a straight run here until next March. Really looking forward to that stability. Monday mornings= Housework! Terry Quote Link to comment Share on other sites More sharing options...
Nigel Day Posted October 13, 2014 Share Posted October 13, 2014 Sorry Danny, been away - and I'm Waaay behind too. Feet under the ribs? I've not looked closely at the wing plan yet but I'm struggling with what the feet, tabs and jigs might all be for. Please don't go to any trouble, I'm sure a few words of clarification will make it easier - even if not until I actually start on the wings. Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted October 13, 2014 Author Share Posted October 13, 2014 Hi Nigel, normal modern model design has built in jigging tabs, or feet on the bottom of the ribs. This means you can build the wing flat on the board and know it will have the recquired washout and remain true through the build. At least while it is pinned the right way up anyway! When you sheet the underside, you have to be careful not to warp all the hard work With this plan the ribs are drawn with a datum line beneath the trailing edge. This line can represent the bench top, and if you place the edge of a engineers square on the line, and glue a scrap of balsa from the rib down to the reference you have made a foot or tab for the rib to rest on. I have taken 240 pics so far so hopefully you can pick your way through the pitfalls if not give me a shout I appreciate I am going a little fast, but I have to make hay while the sun shines My wife is working away at the moment and that means I can get in the workshop once I have put my daughter to bed. Quote Link to comment Share on other sites More sharing options...
Nigel Day Posted October 13, 2014 Share Posted October 13, 2014 Many thanks Danny, that explanation works for me. Oh, and the speed is no problem. Everything is beautifully documented. I just wanted to get the explanation with the relevant pics, rather than 2 months down the line when all's done and dusted with your build. Edited By Nigel Day on 13/10/2014 10:02:46 Quote Link to comment Share on other sites More sharing options...
Charles Galloway Posted October 13, 2014 Share Posted October 13, 2014 Have you any tips for cutting the tapers on the ends of B3 so as to get a nice flat surface? Maybe the laser cut parts come ready tapered. I'm still working on the tailplane/elevators but looking ahead. Quote Link to comment Share on other sites More sharing options...
Andy Muckley Posted October 13, 2014 Share Posted October 13, 2014 Hi Danny not got to wings yet tail section done and all ok so far. Must get round to doing a blog but am working some silly hours and shifts at the mo so don't think i'll have time, what time i do have will be flying or building this project Quote Link to comment Share on other sites More sharing options...
AlexJ Posted October 13, 2014 Share Posted October 13, 2014 Hi Danny, Seeing your comments regarding the flap/aileron lines, I agree it could end up causing major headaches, if total fidelity is the goal ( it must be a recognised condition!). A solution that shows some break in the shroud line will fool the eye sufficiently. Looking at various pics, it seems the aileron is almost parallel chord, moving the inner leading edge of the aileron out, would provide the shroud step. This might be something for the next scale mass build, chippy at 1/4 scale Alex Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted October 13, 2014 Author Share Posted October 13, 2014 Posted by Charles Galloway on 13/10/2014 11:28:50: Have you any tips for cutting the tapers on the ends of B3 so as to get a nice flat surface? Maybe the laser cut parts come ready tapered. I'm still working on the tailplane/elevators but looking ahead. Hi Charles, I have a belt sander and that made fairly light work of the taper on both B1 and B3. A razor plane would be fine to get close to the taper and finish with sanding, certainly on the balsa B1. B3 is ply and as such a bandsaw might be another option to get it close, then again sand to final shape. Not a two minute task, and watch the dust Cheers Danny Oh meant to say, when the taper gets very thin at the tip, place a stiff piece of wood behind the section so that it doesn't flex away from the sanding block and cause you to create a curved shape. Edited By Danny Fenton on 13/10/2014 11:42:16 Quote Link to comment Share on other sites More sharing options...
Martyn K Posted October 13, 2014 Share Posted October 13, 2014 Hi Danny What Belt Sander do you use? Its on my Christmas list.. Martyn Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted October 13, 2014 Author Share Posted October 13, 2014 Hi Martyn, mine is similar to this, mine also has a table in front of the disk. Mine is Yellow. The image is a link Cheers Danny Quote Link to comment Share on other sites More sharing options...
Nigel Day Posted October 13, 2014 Share Posted October 13, 2014 I wouldn't worry about that Andy. My take is that the idea is to have fun doing the build. If you've time (and the inclination) for a blog, so much the better. The blogs of the older () and experienced builders are a boon to newbies like me. The other blogs are interesting, and often give additional insights, but I'd have said that they're as much about personal pleasure and entertainment as they are about providing information. Mine is slightly useful to me (as a record), probably entertaining to others and usually instructive on basic errors and naughty shortcuts. Quote Link to comment Share on other sites More sharing options...
Martyn K Posted October 13, 2014 Share Posted October 13, 2014 Interesting - thanks - Was thinking of this one... CBS1-5 M Quote Link to comment Share on other sites More sharing options...
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