Something to do while bored at work
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Well yes, the drag from boundary layer separation off the steep back surface will destroy the effectiveness of the aerofoil, as well as increase drag. The only 'lift' will come from the angle of attack.
Correct, most of it does anyway. That's what all the collective and cyclic pitch stuff is all about: The angle of attack.
I have lived with several Zen masters - all of them were cats. His last invention was an evil Lasagna. It didn't kill anyone, and it actually tasted pretty good.
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Correct, most of it does anyway. That's what all the collective and cyclic pitch stuff is all about: The angle of attack.
I have lived with several Zen masters - all of them were cats. His last invention was an evil Lasagna. It didn't kill anyone, and it actually tasted pretty good.
Well, most of an the angle of attack on a symetric foil is just to present the foil as an asymmetric one to the airflow and hence get a pressure drop in line with Bernoulis theorem. Of course you do get additional lift from increasing the angle of attack beyond that because of the downward movement of air due to that angle, and it is considerable, when used, but also expensive in terms of drag, and is of course limited by stalling when the boundary layer breaks away. At that stage the drag is huge, and the lift from Bernoulis theorem gone. This is the state your friend had his rotor in by running the aerofoil backwards. He was using it like a paddle!
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Circle your right foot in a clockwise direction. Now with your right index finger draw a 6 in the air Your foot has changed direction and there aint a damn thing you can do about it.
I can do things like twiddle thumbs, one in each direction as well as a number of Stan Laurel's famous motion notions[^].* So - I thought I'd break this one. Then I realized what sort of quest upon which I was about to embark. * I can do the enhanced version wherein one claps between knees terminal points. First once, then twice, etc. I am indeed multi-talented.
"The difference between genius and stupidity is that genius has its limits." - Albert Einstein
"If you are searching for perfection in others, then you seek disappointment. If you are seek perfection in yourself, then you will find failure." - Balboos HaGadol Mar 2010
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Circle your right foot in a clockwise direction. Now with your right index finger draw a 6 in the air Your foot has changed direction and there aint a damn thing you can do about it.
dude - evil
Charlie Gilley <italic>Stuck in a dysfunctional matrix from which I must escape... "Where liberty dwells, there is my country." B. Franklin, 1783 “They who can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety.” BF, 1759
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Circle your right foot in a clockwise direction. Now with your right index finger draw a 6 in the air Your foot has changed direction and there aint a damn thing you can do about it.
Did not work for me as I kept drawing 9s in the air. :rolleyes:
Nish Nishant Consultant Software Architect Ganymede Software Solutions LLC www.ganymedesoftwaresolutions.com
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The tail rotor also has a collective pitch control, so it's both. It's always installed on the opposite side to where the main rotor's torque would turn the tail, so that it pushes against it. tail rotor on the starboard side -> main rotor turns clockwise Tail rotor on the port side -> main rotor turns counterclockwise
I have lived with several Zen masters - all of them were cats. His last invention was an evil Lasagna. It didn't kill anyone, and it actually tasted pretty good.
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Leo56 wrote:
Eurocopter
Airbus. They now call themselves Airbus. Just outside the town is this place[^], which also now belongs to Airbus. Fenestrons for models of Airbus Helis are hard to find and usually hard to get. That's why I stick to conventional tail rotors, like the one for the Huey I have been working on for quite a while.
I have lived with several Zen masters - all of them were cats. His last invention was an evil Lasagna. It didn't kill anyone, and it actually tasted pretty good.
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Circle your right foot in a clockwise direction. Now with your right index finger draw a 6 in the air Your foot has changed direction and there aint a damn thing you can do about it.
My friend complains that he cannot do it while he is driving!! :doh:
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Circle your right foot in a clockwise direction. Now with your right index finger draw a 6 in the air Your foot has changed direction and there aint a damn thing you can do about it.
Actually, if you focus on the foot, and speed up the speed at which you make the 6, such that you are in the middle of the transition at the bottom of the rotation, I believe you can inhibit this response effectively. You have to alter your psychological run burst to be really small, just enough to kick off the 6 with the finger and maintain focus on your foot. But it took about 3 tries, and now I can do it easily enough... Curious if others found that...
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No, but if my main rotor turns clockwise, on which side should I look for the tail rotor. Port or starboard?
I have lived with several Zen masters - all of them were cats. His last invention was an evil Lasagna. It didn't kill anyone, and it actually tasted pretty good.
Just noticed your sig, CodeWraith ("evil lasagna")--I love that movie!
vuolsi così colà dove si puote ciò che si vuole, e più non dimandare --The answer to Minos and any question of "Why are we doing it this way?"
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Just noticed your sig, CodeWraith ("evil lasagna")--I love that movie!
vuolsi così colà dove si puote ciò che si vuole, e più non dimandare --The answer to Minos and any question of "Why are we doing it this way?"
I just searched, but only found easy lasagna recipes. :-)
I have lived with several Zen masters - all of them were cats. His last invention was an evil Lasagna. It didn't kill anyone, and it actually tasted pretty good.