If you believe they've got anything on Mars you will believe anything.. I can show you on earth with nasa trucks, the "rovers" on earth with the same landscape they call Mars
why power it from the side shaft? couldn't the green gear be an idler with power provided to the blue gear, allowing for a linear installation with the piston/turboshaft powerplant?
It could, but then you wouldn't be able to shift gears between the props like it shows a little later in the video. I guess it depends on what you're using the props for, if they are both angled to provide thrust in one direction, or in opposing directions.
this layout highlights something about contra rotating setups that no-one seems to comprehend. the reaction torque of the rotating input shaft. consider, that yoke holding this assembly has to be attached to something... the plane, the engine... to spin the crankshaft one way against any type of load, means there will be a reaction. if this setup was in a plane, the engine would be at right angles hence it would tend to have a PITCH... or YAW, depending on the engine orientation... in any case, it will be to twist the yoke over around the input(green) shaft, in opposition to any load imposed by the rotating assemblies... the contra rotating prop eliminates the "torque roll" of trying to rotate a single propellor in one direction, it eliminates the "torque roll" of the twisting helix of air induced by a single propellor acting on the plane itself, and it eliminates the gyroscopic precession of the propellor spinning in one direction... but it MAGNIFIES the torque reaction to whatever is producing rotating motion to the input shaft. it now has to fight extra friction, AND rotate two assemblies, or double the mass, double the inertia... double the load...
@@nork7045 no it doesnt. you overlook how an engine works. compare a standard radial to a rotary radial, perhaps you will get it. ever fired a gun? same idea. kickback. newtons law of action and reaction. a piston being forced down the bore of a cylinder is no different to a piston staying still and having the cylinder forced off. for the crankshaft to rotate one way means the cylinder, crankcase, the entire engine AND EVERYTHING CONNECTED TO IT will experience an opposing torque... adding a gear doesnt solve this. its still attached to the aircraft. its still part of it.
@@paradiselost9946 Right, you also need to add weights to said gear to ensure it has an equal rotational inertia to the input gear and engine shaft. When the engine spins and accelerates the input gear, an equal acceleration is imparted on the opposing gear, but in the opposite direction, so the forces cancel out given that both have the same rotational inertia.
I'm a new subscriber to your page and I find your animations really ingenious. However, I'd like to know if it's possible to get the 2D version of this animation or the dimensions so that I can try it out too.
In coaxial helicopters where there is no tail rotor to be used for yaw moment, we achieve it by changing pitch of rotors. Pitch of one rotor is increased which increases the drag on that rotor disk hence more opposing force on the body. At the same time the pitch of the other rotor is decreased to maintain height which in turn decreases drag on that body hence less opposing force. This difference in opposing forces on two rotor disks produces yawing moment.
I'd love to find out if such a drive can function like a cars differential. If one gear is slowed or stopped, can the other gear then increase in speed? I'm not particularly proficient with gears. If this doesn't work in that way, do you know of a drive that functions like that for coaxial propellers?
@@pritamdas5439 Another question: I am told (though it may not be true) that the conventional single-rotor helicopters have the benefit of the gyro effect to keep them stable. However, I am also told that two gyros on the same axis spinning in opposite directions will have no gyro effect. Does this mean that coaxial helicopters are less stable?
I think that the "Mars Helicopter" uses a similar set up? Liked the clip. My thanks.
If you believe they've got anything on Mars you will believe anything..
I can show you on earth with nasa trucks, the "rovers" on earth with the same landscape they call Mars
شكرا ، لأنك من الذين يحبون تبسيط المعلومة وتقديمها لكل الناس. بالتوفيق دائما
أنا من متابعيك وأتمنى لك السعادة والسلام
Mechanism and your explaination .. it rocks.👍
Amazing 👍👍👌👌
Superb 👍🏼
Nice presentation 👍
why power it from the side shaft? couldn't the green gear be an idler with power provided to the blue gear, allowing for a linear installation with the piston/turboshaft powerplant?
It could, but then you wouldn't be able to shift gears between the props like it shows a little later in the video. I guess it depends on what you're using the props for, if they are both angled to provide thrust in one direction, or in opposing directions.
Cracked it!
Nice work..👌👌👌👌👌
this layout highlights something about contra rotating setups that no-one seems to comprehend.
the reaction torque of the rotating input shaft.
consider, that yoke holding this assembly has to be attached to something... the plane, the engine...
to spin the crankshaft one way against any type of load, means there will be a reaction. if this setup was in a plane, the engine would be at right angles hence it would tend to have a PITCH... or YAW, depending on the engine orientation...
in any case, it will be to twist the yoke over around the input(green) shaft, in opposition to any load imposed by the rotating assemblies...
the contra rotating prop eliminates the "torque roll" of trying to rotate a single propellor in one direction, it eliminates the "torque roll" of the twisting helix of air induced by a single propellor acting on the plane itself, and it eliminates the gyroscopic precession of the propellor spinning in one direction...
but it MAGNIFIES the torque reaction to whatever is producing rotating motion to the input shaft. it now has to fight extra friction, AND rotate two assemblies, or double the mass, double the inertia... double the load...
this can be solved by adding a 4th gear infront of the input gear. It's more friction but if one really wanted no torque reaction it's the way to go
@@nork7045 no it doesnt. you overlook how an engine works.
compare a standard radial to a rotary radial, perhaps you will get it.
ever fired a gun? same idea. kickback.
newtons law of action and reaction.
a piston being forced down the bore of a cylinder is no different to a piston staying still and having the cylinder forced off.
for the crankshaft to rotate one way means the cylinder, crankcase, the entire engine AND EVERYTHING CONNECTED TO IT will experience an opposing torque...
adding a gear doesnt solve this. its still attached to the aircraft. its still part of it.
@@paradiselost9946 Right, you also need to add weights to said gear to ensure it has an equal rotational inertia to the input gear and engine shaft.
When the engine spins and accelerates the input gear, an equal acceleration is imparted on the opposing gear, but in the opposite direction, so the forces cancel out given that both have the same rotational inertia.
I must say this channel is so underrated. You deserves more views.
thank you arpit sir. please share the videos and support me.
Good intro👏👏👏
I'm a new subscriber to your page and I find your animations really ingenious. However, I'd like to know if it's possible to get the 2D version of this animation or the dimensions so that I can try it out too.
Very well explained.👌
👍👍👍👍
but it will have a great friction wont it?
É banhado a óleo
IRL they use ball bearings to deal with that
Best animation
Thank you anuraj sir.. 👍🏻
Nice work 👍
Thank you shriram sir... 👍🏻
Good job 👌👍
Thank you dj flywill 👍🏻
I love this
Superb mechanism bro
Thank you brother... 👍🏻
@@EngineOn the video deserves it bro. Thanks for it
It's really great video👌
Thank you sagar sir.. 👍🏻
its better to have 2 idler gears vs just 1
How the coaxial rotor helicopter make a yaw movement, there's must be have a slightly different speed among the rotors??
In coaxial helicopters where there is no tail rotor to be used for yaw moment, we achieve it by changing pitch of rotors. Pitch of one rotor is increased which increases the drag on that rotor disk hence more opposing force on the body. At the same time the pitch of the other rotor is decreased to maintain height which in turn decreases drag on that body hence less opposing force. This difference in opposing forces on two rotor disks produces yawing moment.
Isn't yaw produced by using vanes at the rear of the heli that are affected by downwash from the rotors?
Amazing
Thank you !
@EngineOn I love engineering, and when you're trying to get your mind around something, visualise it. This does the job nicely.. 🙏🏻
Which software your are using
Molto bene dove posso trovare il materiale ne devo o
Costruire una
लेट पण थेट👌👌👌
Thank you swaroop.. 👍🏻
Wow it looks superb, which program is used for making that
why a counter rotating helicopter will fly when the upper blades n lower blades are spinning at the same speeds in different directions?
Amazing.
Thank you.
Coaxial Propeller Drive
Nice! Which software you used for animation?
I'd love to find out if such a drive can function like a cars differential. If one gear is slowed or stopped, can the other gear then increase in speed? I'm not particularly proficient with gears. If this doesn't work in that way, do you know of a drive that functions like that for coaxial propellers?
Awesome
Thank you so much.. 👍🏻
Do you have the link of the project in the simulator to download?
Now add a variable pitch mechanism for each propeller and things get much more complicated.
What's that gear shifting for?
airplane kamov k32 Russian Spin its blades in this way
How is yaw controlled? (without grinding the gears)
Yaw is controlled by creating a torque imbalance between both rotors. Torque imbalance can be created by changing the pitch (angle) of the blades.
@@pritamdas5439
I see.
Thank you.
@@pritamdas5439
Another question: I am told (though it may not be true) that the conventional single-rotor helicopters have the benefit of the gyro effect to keep them stable.
However, I am also told that two gyros on the same axis spinning in opposite directions will have no gyro effect.
Does this mean that coaxial helicopters are less stable?
wow interesting
Thank you..
👍👌
🥰🥰🥰❤❤
Thanks
C est simple mais il fallait y penser
Tres belle video explicative
Thank you..