On Friday 17 December 2004 21:51, Vivian Meazza wrote: > Lee Elliott wrote: > > On Thursday 16 December 2004 21:17, Jon S Berndt wrote: > > [snip...] > > > > > Also, ask yourself the question, does the normalized value > > > of, say, 0.5 really correspond to 30 degrees of flaps when > > > the total range is 0 to 60? > > > > Are you not assuming a linear transition here? It doesn't > > have to be. > > How do FDMs handle Fowler flaps? i.e. the first part of the > action extends the flap rearwards without any rotation, acting > only to increase wing area, then for the rest of the action > rotate downwards? > > Easy enough to 3d model with a normalized input: translation > then rotation. > > Just curious > > Vivian
That's exactly one of the problems I'm trying to work out wioth the B-52. The flaps have only two settings - fully extended or fully retracted, and it took 60 sec for full traversal. IIRC, the first 60%, or so, just increases the wing area, with the remainder changing the downwash. I've no idea what YASim is doing, as far as numbers go, but it seems to be behaving close according to anecdotal evidence. Perhaps flight control surfaces should be defined in terms of the change to chord and incidence but then how do you get the data? LeeE _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
