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Old 12-18-2004 | 06:57 PM
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Ben Lanterman's Avatar
Ben Lanterman
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From: St. Charles, MO
Default RE: Trying to understand incidence

LOUEW ,IS RIGHT ON..

He often is.

AS ALWAYS,SIMPLE ANSWERS TURN INTO PAPER AND WORD WARS..

Trying to be accurate isn't bad, just good science.

"FLYING WINGS" HAVE NO DECALAGE...... "I KNOW ABOUT REFLEX" PLEASE DONT GO THERE..

And this is relavent because.......

O-O-O STATIC. WILL RESULT IN A FLYABLE AIRCRAFT..THERE IS ENOUGH DRAG ABOVE HOROZONTAL C.G TO ADD POSS.INCEDENCE. IT WILL HOWEVER, NOT WANT TO COME OUT OF A DIVE WITHOUT, A LOT OF ELEVATOR.INPUT.
.AS PER BAD DESIGNS,,FLIGHT SPEED SPECIFIC,,WHY NOT JUST FLY WITH A DROUGE SHOOT DEPLOYED??

Differential drag above and below the vertical location of the CG (I believe this is what you wanted to say) doesn't make it stable - It gives an incremental pitching moment that will be dependent on velocity squared. Not something that will work at a constant velocity which is what decalage will do. We don't fly with drouge chutes (I believe this is what you wanted to say) because we fly airplanes.

I STRIVE TO MAKE THINGS WORK WELL THE FIRST TIME, NOT PATCH THEM LATER TO GET RESULTS.. I HAVE FAILD IN THIS QUEST MANY TIMES..

Making a trainer that is stable and self righting work well is making things work well the first time. I would be interested to know what you consider to be a "patch" on an airplane.

"THEY" SAID A HONEY BEE CAN NOT FLY ALSO..SAVE ALL THE, HO-CUS PO-CUS. FOR JOB INTERVEIWS..

No aerodynamic eng. that knew what he was talking about ever said this. What we typically used in airplane aerodynamics is just a subset that works OK in the Reynold's number range that our airplanes happen to fly in. The aerodynamics of the Honey Bee as well as certain flies, etc. work on the "clap and flap" (I think I remember hearing it as clap and fling also) mechanism which is a very low Reynold's number phenomena. The flat plate wings hit at the top of the upstroke (the clap) and then sweep down (the flap). In the process a big vortex action is produced (the lift). As the wings make the upstroke the rotate and produce no vortex action until the clap again at the top.

Other insects make use of other flat plate aerodynamic vortex producing actions. The aero engineer worth his salt knows this. Again it is a subset of what the total fluid dynamics study is about.

This isn't hocus pocus, it's just good science. People can understand it and don't need the information dumbed down for them. Knowing how things work isn't a bad thing, rather it is something to strive for.

And yes, lose the caps. If you want to use the caps but sure and use very smooth sentence structure.