http://i28.photobucket.com/albums/c2...ndSparrows.jpg If I temporarily neglect the changes in drag due to changes in pitch. If I make a nod in the direction of compressibility drag with a simple algorithm such as Cdc = (1-(CL-0.25))/400.... By heck I'll make a lot of enemies but a graph of CL squared versus CD will be linear and at the "interview" I'll hope to discuss why this isn't exactly so.
Such devices as these allow me to concentrate on increasing weight purely in terms of increasing CL assuming everything else such as pressure altitude and speed are constant. I drew the accompanying graph based on a fixed Cd0of 0.01563 and Cdi = CL^2/26.295 using logarithmic values purely to compress the data values into a conveniently small range.
Any resemblance to a Company "A" or "B" product that may or may not have served on QF575/580 must be the result of a fevered mind.
The outrageous "dings and sparrows" is my flippant aside. It doesn't take long for a sleek and svelte airframe to become as dimpled as a baby's bottom.
Incidentally I've been parked up the last few months having had a mild stroke through overwork (okay overeating) and demyelinating nerves and have reluctantly concluded that Company "A" (or is it "B") can happily go to the dogs without my assistance. Mrs "E" demands that I pprune but occasionally so its back to Oz when I'm fit enough. No more Frogs Legs!!
Best wishes to all, especially those at home and I hope the Poms are enjoying the seasonal stuffing this Chrissie!