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Yup...the lowest ratio IPS - 3.5:1 - is 7x6 on 2s LIPO.
you might try Aircraft world..www.aircraft-world.com Ships anywhere cheap. However they don't do the RXC stuff anymore..Hmm. BUT they do the hotter RLC motor, which should work very well indeed on 2s...never tried one..6x5.5 and 4.1 box works..now.. So..thats one possible. RLC motor, and LPS 4:1 gearbox. I think that fits the same stick mount as the IPS gearbox. Otherwise a different supplier might net you an RLC motor in a S1 IPS gearbox. Or 3s LIPO and DX2 (RXC) motor in 4:1 S1 gearbox. Hmm. It looks like the ONLY way to get low ratios is to get the LPS gearbox.. I think it fits the same though.. So..LPS 4:1 box, and either 3s LIPO and the standard DX motor, or RLC motor on 2s LIPO. If you run into supply probs, PM me..they are just about available in the UK.. http://www.jperkinsdistribution.co.u...t%20items#L009 |
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Pete is absolutely right about the 4.3 gram servo. The 9g servo I used on my AerodromeRC Morane L (designed originally by Pete) was moaning under the load (albeit with a way thicker wing). So make the wing nice and wobbly, you can easily do that because you'll have functional rigging to take most of the stress. On my (now retired) wing-warping biplane (an adapted GWS stick) I was using one servo for each panel, a 6g servo and a 9g servo. The 9g servo took the load w.o. problems and so did the 6g servo, although you could here it complain loudly
So I'd say take a nice and sturdy 9g servo for the job. Those additional 5g won't kill the flying performance. I'd prefer using the upper cables for pulling the wing-tips up only to avoid adversive yaw and reduce stress on the servo. But here you want just as much throw as you can get for decent handling: Keep in mind that a standard aileron does not only change the incidence of its part of the wing by a few degrees, it also changes the airfoil's characteristics so it would produce downforce instead of lift even at zero incidence. With wing-warping, you don't change the airfoil, but *only* the angle of incidence, so you need more throw than you'd give to an aileron to get the same response. If you don't, you'll end up with wing-warping where you can lean on the stick and count to three until the plane starts banking ever so slightly.You can check out my thread on wing-warping on Kurt's forum: http://www.bengco.net/cgi-bin/yabb2/...num=1147469311 |
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Hi all,
thank you very much for your fast and usefull answers. Pete, if she is a prototype, yes you are right, I have started the building of the Nieuport IV proto. I have search stuffs on the internet for this plane and I have found these links (there were more, but I think these are usefull): http://mars.ark.com/~mdf/N_6.html http://www.ctie.monash.edu.au/hargrave/nieuport.html http://www.ejercitodelaire.mde.es/we...2570D7004653D7 http://en.wikipedia.org/wiki/Image:Nieuport_IVG.jpg http://www.avrosys.nu/aircraft/Flygkomp/01_M1_M2.htm http://de.wikipedia.org/wiki/Bild:Nieuport_IVG_1912.jpg http://www.luft46.com/Planet/098.html http://www.geocities.com/bulgarian_a...ieuport4BG.htm http://www.wwi-models.org/Images/Mar...nch/index.html http://mars.ark.com/~mdf/N_4d.html http://www.kwmairpl.com.ph/KWPlanesD...tCodeQ=RC-22FR http://www.earlyaviator.com/archive/...ann.Rheims.jpg http://www.earlyaviator.com/archive/...anet_nieup.jpg Yes maybe the small servo is not enough to wrap the wing. I will use Hitec HS-50 therefore. I have got a two cell Kokam 720mAh Lipo battery in stock. I'm thinking about the 3 cells. W.I.P, thanks, I will check that thread. Vintage, I know that you will answer soon and gave the answer for my question. Thanks! Pete and You said that the 3 cells are better so maybe I will try that setup too. But I can't use LPS engine because it doesn't fits the same stick mount. So I have to use only IPS and I have got an IPS DX2. I have built that into my Caudron. I will remove from that plane. So first I will try with 2cells Lipo and after I will try with three.Edi, thank you for the help about the wing warping. I have checked that link too. As I wrote I will use Hitec 9g servo to wrap the wing. Maybe it will work. I would like to build the control mechanism as authentic as I can. I have to order spoken wheels from SAMS. I hope he has got spoken wheels for this model. And here are the first photos: |
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