₦airaland Forum

The picture below is the swashplate changing the pitch of the blades.
NOTE!!! : The servos moving the swashplate is hidden inside the helicopter.

The animation picture below is the servo moving the swashplate.

@ Gigeadek,

Below is an animation picture of a servo.
NOTE!!: The black screw you see rotating from a clockwise direction to an anti clockwise direction is the output shaft.
The black arm you see moving from left to right is the crank setup.
The movement it does,from left to right is technicaly called a 'linear movement'.
So you now see,how the black arm simply converts rotary movement into a linear movement?

BabaAlabi: This is awesome. I hope it flies after all this hardwork. What did you read in school?

The answer to your question is in the first page of this thread.

Gigeadek: my questn is dt, how can d swash plate control automaticaly by radio controller. I jst want u to analys on it and d receiver and transmittr

Ok....
To put it in a way you'll easily understand. I shall explain the relationship between them.

The relationship between them,is that; the swashplate is connected to the servo. The servo is connected to the Rx. The Rx recieves pwm signals sent from the Tx.
There's a component you missed.
The servo. The servo is a device that converts pwm signal into mechanical movement. Simply put. A Servo is a small device that has an output shaft. This shaft can be positioned to specific angular positions by sending the servo pwm signals. As long as the pwm signal exists on the input line, the shaft of the servo will maintain a certain predetermined angular position. As the pwm signal changes, the angular position of the shaft changes.

The Tx has a joystick. The Tx transmits a pwm signal. When the position of the joystick is changed. The pwm signa also changes. This change is directly proportional to the position of the joystick.
When the Tx transmits,the Rx receives this signal and demultiplexes the signal to the various channels.
The servo receives a pwm signal from one of the channels in the Rx. It then uses this pwm signal to move it's output shaft to a certain angular position,determined by the current pwm signal it is receiving at that instant.
The swashplate is connected to the output shaft of the servo,through a crank setup that converts the servo's output shaft angular movement into a linear movement(up and down movment,in this case)
This is the relationship that exist between these devices.

@Gigeadek,

i don't see any reason why i should have your facebook account name. If you think i can help you,then do feel free to ask your questions here. I don't give out my number,unless i know who i'm dealing with.

And some explanatory vids

I shall be answering your questions sooner

That's pretty remarkable

Afrobasic: ^^^
who is sidajili and how do i contact him?

He's a hobbyst. Here is his thread: https://www.nairaland.com/1414595/nairalanders-remote-controlled-aircraft-suavs

Afrobasic: @pakingzzz, good job.
PS: does any one know where I can get an RC heli in lagos?

Ask Sidajili,he knows better.

Secondly,the two Arms goes in.......

[s]Now, lets couple the whole lots.....
...[/s]
The two screws holding the two Arms are screwed in first.....

(7) The main gear,with the two stopper screws screwed in place.

(6) One mini screw(for holding the oneway bearing and the main rotor shaft in place)

(5) One aluminium ring (fabricated from aluminuim sheet)

(4)Two micro springs

(3) The two 'Arms' (cut from aluminuim sheet)

(2) Two Micro screws and Four Micro nuts

ONEWAY BEARING PARTS....
.
Here are the parts i used in fabricating and designing it.
(1) The main hub.....

On a closer look,one can easily tell what would happen,if the oneway bearing decides to spin in the anti clockwise direction!
It will spin freely,because the Arms now approaches the stopper screw with its rounded side. Consequently,they just slide along. Take a look at the pix below.

To properly understand what i just explained. It would be convenient to look at the pix below.
Suppose A and B are the two stopper screw.
If the oneway bearing should spin in the clockwise direction. It is logical to assume the oneway bearing would abruptly gets stoped by the stopper screw!

Notice the two silvery grey semi circle objects that are spring loaded on the oneway bearing. I prefer to call them 'Arm'
It is this Arm that does that little trick. When spining in the right direction,it comes in contact with a stopper screw,sprouting out from the main gear. And so the Arms gets locked to the main gear: they spin together as one.
But when spining in the wrong direction,this Arms comes in contact with the stopper screw,but does not get locked. This is because the Arms have a rounded side. And it is this rounded part that comes in contact with the stopper screw when they spin in the wrong direction,and the stopper screw merely slide along the arm,thus depressing and freely passing by. They don't get locked.
.
Just take a look at the pix below.

Building this unit had to be done with care and accurate measurements. Because this unit will be spining at a very high Rpm,it had to be balanced,as would other rotating parts.

Coming down to building mine created design problems,as would anything you decide to build on your own.
After some brainstosmings. I crossed the T's, dotte the I's and grouted the tiles. I finaly came up with the design below.
Note!!... The Sim card beside was studiously kept there,to give you an idea of the size.

.

ONEWAY BEARING......
.
A oneway bearing is a bearing that allows movement in one direction only. It is attached to the main gear,and they both form the autorotation wheel.
When the main rotor is spun in the wrong direction,it spins freely,and doesn't spin along with the main gear,although it is attached to it. But when spun in the right direction,the main rotor shaft gets locked to the main gear,by virtue of the oneway bearing,and it spins along with it .
It is this oneway bearing,that facilitates this unique feature. It is attached to the main gear. And this main gear is attached to the main rotor shaft,through the onewaybearing.

Finally,the video's been indexed and catalogued.
Here.
https://www.youtube.com/watch?v=w6XW2usDbNU&hl=en&gl=NG&guid=&client=mv-google

D Don1: U know, ur topic looks so beautiful but u don't have the equipment to build ur device.

.
Yea D Don1. I actually dont have the equipment. It's even a wonder to me how i have managed,in the long run.

Just uploaded a video of my homebuilt oneway bearing. I will post the link as soon as Youtube makes it available.
At the moment,it isn'nt available. It takes Youtube's search database a day or two to find, index and catalogue uploaded videos, and to update correctly.

I'll keep you all posted.

Update!!!