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06/01/2014 10:32 am
And along those lines..........
you can ask why they used springs for the brake ducting as well - those lines do not need to expand or contract so there is no requirement and thus no excuse for having 'open' springs in those locations.
06/01/2014 3:49 pm
It's a real challenge
If the ducts were made from solid rubber, they just wouldn't stretch enough. If they were a rubber tube, they would collapse into a thin section when stretched, and especially when stretched and bent.
My guess is that the full-scale ducts are aircraft "scat" tubing, which is made like a drier vent but of much stronger material. It can be collapsed into a fairly short length and then stretched out; the spiral "spring" built into it keeps it from collapsing when stretched/bent, just like the spring CMC uses. It's used for ducts in a couple of places in my airplane and in most small airplanes. It would be prohibitively expensive to try to make something like that for just one model. I'm not fond of what they've done but IO do NOT have a better idea!
Wayne
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