wingcoax Posted January 22, 2022 Share Posted January 22, 2022 Just measured up the wings on an old? Mascot trainer. 10" chord wing used 7" white bands x6. Never had wings come loose in normal service. ps found a bag of bands recently that have to be 20 years old, still as they were bought. Quote Link to comment Share on other sites More sharing options...
J D 8 Posted January 22, 2022 Share Posted January 22, 2022 (edited) PatMc. I have found it does more so on glider types flown where the landing site can be rough. Catch a wingtip on a tuft or something and there is a lot of leverage at the bolt fixing. I find 4 bands enough on these lightweight [less than 5lb] models that are not flown in an aggressive manner, wing will twist out of square with fuselage enough to save damage most of the time. Edited January 22, 2022 by J D 8 more info. Quote Link to comment Share on other sites More sharing options...
dave windymiller Posted January 22, 2022 Share Posted January 22, 2022 (edited) Something worth noting is the way the bands are put on. The last example has no side force keeping the band (green) on the dowel (red) and relies on tension and dowel length only. Add a bit of slippery fuel residue and they can fly off too easily along with the wing. Edited January 22, 2022 by dave windymiller Quote Link to comment Share on other sites More sharing options...
ken anderson. Posted January 23, 2022 Share Posted January 23, 2022 last century when i was "learning" with my dear Yamamoto....the rubber bands save my model a good few times from getting wrecked......and more time repairing than flying.. ken anderson...ne..1.........L dept. Quote Link to comment Share on other sites More sharing options...
David Mackay 1 Posted January 23, 2022 Share Posted January 23, 2022 I have experienced all the above observations so why no use springs. Springs will "give" and return to position. They will not deteriorate and available in many sizes. Ensure the load is not on a single point to evenly distribute the load on the balsa and use hard wood. Another thing that deteriorates with ultra violet light is fibre glass resin. So keep that in the dark as well. Quote Link to comment Share on other sites More sharing options...
J D 8 Posted January 23, 2022 Share Posted January 23, 2022 Springs will "give" and return to position. Hmm, I recon that is what the bands do. Quote Link to comment Share on other sites More sharing options...
Rich Griff Posted January 23, 2022 Share Posted January 23, 2022 More metalwork flying around etc.. Quote Link to comment Share on other sites More sharing options...
Dad_flyer Posted January 23, 2022 Share Posted January 23, 2022 On 20/01/2022 at 09:47, EarlyBird said: For 12" between the sticks I use 8". Flying two models with bands today. 12" chord Ugly Stik, 8" bands. Then the same 8" bands on Double Diamond which is about 15" chord and then the sticks are nearly 4" below the wing. Because 8" are the biggest I have and DD is tough. Quote Link to comment Share on other sites More sharing options...
Robin Colbourne Posted April 10, 2022 Share Posted April 10, 2022 Diagonally crossed bands are less likely to come off in a cartwheel, so are more likely to result in damage to the leading and trailing edges. Parallel bands do come off so protect the model better. Diagonal bands put their load on the thickest part of the chord at the dihedral beak, whereas straight ones do so outboard of the fuselage side, so they support the wing better too. If you are concerned about the bands sliding off before you want them to, then your dowels should be longer. Quote Link to comment Share on other sites More sharing options...
Don Fry Posted April 11, 2022 Share Posted April 11, 2022 Or a small thin band across the wing, span wise, to hold them on without stressing anything in the event of an arrival. Quote Link to comment Share on other sites More sharing options...
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