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Old 03-29-2004 | 07:15 AM
  #9  
Kris^
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From: concord, NC
Default RE: BME-44 information

Well. . I may as well let the secret out. .

This is a prototype 80" Funfly, using full-flying tail surfaces and STOOPID wing area. Span is 80", average chord is 26.5, weight witht he OS1.60 was right at 13.5 dry, and I'm really trying hard to keep the weight with the BME under 14.5. The fuselage has ain internal tunnel for canisters, so I've looked it over and decided to used a header-exhaust pipe system that lopps around the cylinder head and then into this tunnel, splitting into two stingers and out the back/bottom of the tunnels exit. I figure it will have aobut hte same sound signature as a standard "banjo" or pitts style muffler, since it's a long tube with a lot of expansion area.

Details about the airframe are:

We call it a "Frenzy" can't imagine why. . . .

Split ailerons using 8411's (going to the heavier duty Futaba 9153's for more throw)
joined flying stabilators using 2 8411's
full flying dorsal/ventral rudder powered by a single 5735 HiTec (Might get changed to a Futaba9153 to save some weight)

Wing area is 2120 sq-in. Wing loading is right at 14.5 ounces/ft.

Flight characteristics? Even nose heavy it will do a hovering waterfall, and will waterfall in both directions. Walls, parachutes, square loops all exhibit a tendency to throw the tail out in front of the pull, even though it's nose heavy, which means it MAY be able to do a "Cobra" when I get it dialed in, will fly right into a hovering flat spin, just slam the rudder over and hold in a little opposite aileron and up elevator and it sits there and spins. I tried to flutter the surfaces. . luckily they didn't cooperate. Roll rate is about 2-2.5 rolls/second, and should improve with stronger servos.

All it needs is to move the wing forward about 1.5-2" (change CG), get the stronger servos on the ailerons, and more power.
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