Spitfire fan Posted March 1, 2015 Share Posted March 1, 2015 Hi all. I would appreciate input on the following. I am building the plane from the plan which calls for 3 off 8mm wide mylar hinges. This is my first build for many years and i have never used Mylar hinges before. I happen to have bought Kavan mylar hinges that are 19mm wide. My concern with using three hinges is can i get them aligned accurately enough. So I was wondering could two 19mm wide hinges be effective. In this case I would not fit the centre hinge. If necessary I could stiffen the aileron by placing thin ply vertically onto the face of the aileron leading edge. Thanks in advance for any advise. Peter. Quote Link to comment Share on other sites More sharing options...
Keith Evans 3 Posted March 1, 2015 Share Posted March 1, 2015 Cut the 19 mm. hinges in half and fit three , it'll spread the loads more evenly . Quote Link to comment Share on other sites More sharing options...
simon burch Posted March 1, 2015 Share Posted March 1, 2015 Personally I wouldn't use Mylar, I would get some fuzzy hinge material and cut to the requirement needed. Really easy to use and you will not wear them out. Something like this http://www.sussex-model-centre.co.uk/shopexd.asp?id=22606 Simon Quote Link to comment Share on other sites More sharing options...
ken anderson. Posted March 1, 2015 Share Posted March 1, 2015 hello peter-the mylar or whatever will do the job- do a dry run after you have slotted the wing and control surfaces-and when your happy use the glue to finish the job.... ken Anderson...ne...1 hinging dept. Quote Link to comment Share on other sites More sharing options...
Biggles' Elder Brother - Moderator Posted March 1, 2015 Share Posted March 1, 2015 I agree with Ken - but use three - a little redundancy never hurt! And its not so hard to align them just get the slots nice and central. If you are really worried you can always buy a slotting jig -- I have one but TBH I've hardly ever used it as I can never find it when I want it and it seems to all work quite well simply "eyeing them up" in the middle! BEB Quote Link to comment Share on other sites More sharing options...
leccyflyer Posted March 1, 2015 Share Posted March 1, 2015 Use at least three hinges. In terms of aligning the hinge slots, do you have a hinge marking and slotting tool? There are several on the market, **LINK** In an emergency you could make one yourself by just taking a small piece or ply, cutting a broad slot out of it and then driving a pin into the middle of the slot, nice and central. If you then offer the slot up to the trailing edge and give it a twist, then scribe a centre line along the trailing edge with the pin, that'll make sure your hinge slots are centralised. Quote Link to comment Share on other sites More sharing options...
Spitfire fan Posted March 1, 2015 Author Share Posted March 1, 2015 Thanks for all the replies and it seems I should stick with three hinges. I have a day or two before I will need to decide so I will wait and see if anyone who has built this model replies. Regards, Peter. Quote Link to comment Share on other sites More sharing options...
iqon Posted March 2, 2015 Share Posted March 2, 2015 nowt to decide, you need at least 3......... Quote Link to comment Share on other sites More sharing options...
Don Fry Posted March 2, 2015 Share Posted March 2, 2015 If one fails in flight, one of those things if you had three, interesting times if you had two. Also consensus view is that Nijhuis is competent enough with a modicum of experience. Quote Link to comment Share on other sites More sharing options...
Matt Jones Posted March 2, 2015 Share Posted March 2, 2015 Don't even think about using two. If it were me I'd be deciding 3 or 4 and would probably go for the latter. Quote Link to comment Share on other sites More sharing options...
Richard Wood Posted March 2, 2015 Share Posted March 2, 2015 On models with aileron torque rods you sometimes see just two extra hinges shown as the torque rod itself forms a hinge at the inner aileron end. Still a good idea to fit three more. Quote Link to comment Share on other sites More sharing options...
Dave Hopkin Posted March 2, 2015 Share Posted March 2, 2015 Personally if Mr Nihuis decided that 3 was a good number I would think long and hard before omitting one Quote Link to comment Share on other sites More sharing options...
Daren Graham - Cambria Funfighters Posted March 2, 2015 Share Posted March 2, 2015 No decision to make, even with a torque rod use three. you would be amazed at the twisting an aileron can do if not supported correctly especially on this type of model. another serious issue is flutter. You havn't lived till you've had aileron flutter. Usually by the time you've registered what is wrong the whole trailing edge has shattered followed by complete loss of control and an expensive pile of wood is awaitng the bin liner. If your lucky though you won't have damaged any innocent bystanders on the way down. Quote Link to comment Share on other sites More sharing options...
Spitfire fan Posted March 2, 2015 Author Share Posted March 2, 2015 Thank you all for your comments. I am not an experienced builder which i why I asked for your input/advise. I will use at least three. Thanks again. Regards, Peter. Quote Link to comment Share on other sites More sharing options...
Richard Wood Posted March 2, 2015 Share Posted March 2, 2015 Don't forget to peg mylar hinges too Peter. Quote Link to comment Share on other sites More sharing options...
will -0 Posted March 2, 2015 Share Posted March 2, 2015 Posted by Matt Jones on 02/03/2015 11:45:34: Don't even think about using two. If it were me I'd be deciding 3 or 4 and would probably go for the latter. 4? you think 4 is enough? I'd go for 5 or maybe 6 just be be sure Quote Link to comment Share on other sites More sharing options...
Spitfire fan Posted March 2, 2015 Author Share Posted March 2, 2015 Will do Richard. Thanks. Peter. Quote Link to comment Share on other sites More sharing options...
Former Member Posted March 2, 2015 Share Posted March 2, 2015 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Richard Wood Posted March 3, 2015 Share Posted March 3, 2015 Interestingly the Wot 4 has only two extra hinges shown when using a torque rod to drive ailerons. Mr Foss has 40+ years experience, but of course the model wasn't intended to be flown at high speed. Is aileron flutter a high speed problem? Quote Link to comment Share on other sites More sharing options...
Former Member Posted March 3, 2015 Share Posted March 3, 2015 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Dave Hopkin Posted March 3, 2015 Share Posted March 3, 2015 Posted by Percy Verance on 03/03/2015 16:24:54: It is when you get it Richard....... Gangster 52. The finest laxative I ever knew. Adrenaline is brown........ Quote Link to comment Share on other sites More sharing options...
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