|
Depends if its a push or pull prop.
|
|
|
|
|
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.
|
|
|
|
|
I would expect that, the bearing is simpler.
|
|
|
|
|
The big question is: Would it work if you did it the other way around? Modifying it to let the main rotor turn counterclockwise instead of clockwise would require reolacing all gears and the rotor main head.
Simply turning around the tail rotor on the boom is much easier, including reversing its turning direction. Bur will it be effective this way?
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.
|
|
|
|
|
Of course not, the airfoil shape is wrong. 
|
|
|
|
|
I know that this works from someone who accidentally installed them wrong. He said that they just made an odd noise, but they did their job.
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.
|
|
|
|
|
The aerofoil running backwards isnt going to produce lift as well as running forwards, so 'did their job; is highly questionable.
|
|
|
|
|
They have a symmetric crossection and collective pitch, including negative pitch. That's not so questionable and the helicopter completed it's flight and landed safely. Not so questionable after all.
That model is now sitting on my microwave at home and I have been flying it for years after this little mishap of the previous owner.
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.
|
|
|
|
|
It isnt the symetry, it is the tear drop shape. Running it pointy edhe first is not going to produce the same lift.
|
|
|
|
|
Not the same lift, but obviously still enough. Obviously some energy was wasted, producing the strange howling sound. And you don't need the teardrop shape. That's an old myth that should have died long ago. Otherwise, how else could paper airplanes, very simple wooden gliders[^] or this thing[^] fly?
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 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.
|
|
|
|
|
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!
|
|
|
|
|
Unless it's a Eurocopter and uses a Fenestron tail rotor....
|
|
|
|
|
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.
|
|
|
|
|
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.
|
|
|
|
|
My foot doesn't move, maybe it's only for people that don't exercise?
anyway if I'm bored at work [if not already at home I go home and] I just do something else.
Signature ready for installation. Please Reboot now.
|
|
|
|
|
Lopatir wrote: My foot doesn't move, maybe it's only for people that don't exercise?
You're just doing it wrong.
|
|
|
|
|
It is interesting it does work for different sides, but not for the same...
"The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge". Stephen Hawking, 1942- 2018
|
|
|
|
|
Bored you say? Never heard of that word around here. The other "B" word is often heard.
|
|
|
|
|
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.
| Ravings en masse^ |
|---|
| "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 |
|
|
|
|
|
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
|
|
|
|
|
Did not work for me as I kept drawing 9s in the air. 
|
|
|
|
|
My friend complains that he cannot do it while he is driving!! 
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
