Great, it seems that the root of the blades (the spinning point) remains to a negative pitch, however, to the end of the blades, that changes to a positive pitch.
negative. basically you can learn this by making a simple rotor from balsa wood, the hub can be made from a light alloy so it has a bit of flex. When offered to the air flow...say a good steady breeze....don't have the rotor level...cant it back a little. The breeze will push the negative pitch...rotor will rotate...as it speeds up you will feel the pull..or lift. Hope this helps.There is a little bit more to understand, as the blades turn...the advancing blade (in other words either blade in question, that's moving forward INTO the wind/airflow) will lift up slightly...relative to the plane/axis...so the length decreases...this is from blade tip to axis...this causes the blade to speed up a little and adds more energy.
Nice one .....👍👍👍.....I have a question ...can any one explain any torque related issues in therms of the directions of turns between the engine props and the rotor blades
Gyro rotor blades are not powered therefor they produce no torque. Gyros have more in common with an airplane then a helicopter. The rotor blades are in constant autorotation.
The simple answer is no. The rotor is NOT driven by the powerplant. Autorotative flight is driven solely by the wind flowing through the blades from below and upward. Thrust is provided by the powerplant (pusher) propelling the aircraft forward.
Yes, that is true. To compensate this effect, the whole fuselage is mounted apporx. 2cm off center to the side in respect to the rotor axis. However, this compensation is only correct for one certain speed. For higher speeds the gyro always wants to roll to the left side, so you can´t fly without your hands on the stick.
if at high speed , the gyro want sto roll left, so u cant remove your hand of the sticks then how do you roll right , isnt your stick partly already on the right side , i.e compensating for the auto roll onto the left side ?
It will flap, but will not Lead and Lag. Leading and Lagging is caused by the center of mass of the blade moving closer to, or farther from the rotation of axis. Think of a figure skater pulling her arms in to spin faster. With the 2 bladed underslung rotor head that this has as the blade flaps up, the effects of underslinging pushes the blade outwards keeping the CoM in relatively the same spot. Therefor the blade doesn't accelerate or decelerate as flapping occurs.
I have never let the blades come to a stop without using the rotor brake but I guess they would stop rotating in 2-3 minutes. It is important to monitor the rotor speed after landing. If you are on smooth ground, you should stop the gyro when the rotor speed is down to approx 50rpm and apply the rotor brake to stop the rotors. If the ground is rough for example grass the gyro should be stopped when the rotors are slowing down to approx 100-150 rpm and on both occasions the stick must be fully forward
The blades are prerotated before the start run with a shaft that is coupled to the motor. This shaft can withstand rotation up to approx. 200rpm. After prerotation the beginning of the start run is in fact a spinning up of the rotor to approx. 320rpm by the wind speed and then the gyro lifts off. So, yes, they are motor powered before start, but not while flying. In fact you can´t engage the prerotation in flight, because it can not withstand the load.
@@leanbean8376 The first summer I was working when I was 15 I found a Gyro Copter for only $550.. I bought it. I never flew it though. My parents made me sell it. It was a Handle Bar Gyro. My Uncle was killed on his first flight in a Gyro. A bolt in the Rotor falling out is what they determined as the cause of his death.
why do all the gyrocopters shake and vibrate so bad? Almost all the videos I watch show them shaking. Is it because the blades are not balanced that good?
Short answer: because gyro's stick controls are DIRECTLY linked to the rotor head (push/pull rods). With NO helicopter like 'mechanisms' to allow for more then blade flex. Long answer: All rotary wing aircraft suffer from what is know as 'differential lift'. The advancing rotor blade creates more lift then the retreating blade; as well as the transitional area when the blades move into axial alignment with the motion (track) of the aircraft (ie. the blades are inline, neither advancing or retreating). This causes the blades to flex differently from each other, tilting the rotor head 'unevenly'. Most helicopters are built to allow for blade flap and swing (as well as pitch compensation). Gyro's, classed as experimental or LSA, are NOT allowed to have variable pitch rotors. So can't compensate for blade forces like a helicopter can. The blades can flex, the entire rotor connection (the hub and 2 rotors, connected to the 'jesus pin') can pivot in ONE axis...but that's not the same thing as on a helicopter. But because of the connection to the 'masthead' that is not all transfered through to the aircraft but rather into the stick (gyroplanes are pushrod connected, NO dampening system). As the rotor blades and rotor head move/vibrate, so does the stick. Because of the physical connection of the stick to the rotor head, unlike most helicopters that have some hydraulic connection (and more complex compensating design), the gyro's stick has to move with the rotor head. The rotor blades do move more then the rotor head does (as they're connected via ONE 'jesus pin' allowing for lifting tilt, but this does translate to small movements in the rotor head) If the rotor blades were actually unbalanced, MORE then just the stick would shake. That WOULD transfer to the aircraft and not just the stick. So its rarely because of unbalanced rotor blades (assuming the blades were properly balanced to start with). As I understand the physics of it all...I don't fly a gyroplane, but I'd love to.
I'm going to have nightmares about the alternate universe where rotors live.
My grandpa liked this video so much he's doing a dance with his back to the floor!
This surprised me and became an awesome math demonstration of sine/cosine.
Tim Mallette
Fascinating. I would have expected a lot more flex and flapping in the blade.
If you were able to recover this camera, I'm impressed!
1:07 the world is an oscilloscope
Ok now we need a video with pilot taking the place of the camera
yep..interesting for people who like this sort of thing :)
Its making me sick when the blades start to spin
VERY COOL!
Great, it seems that the root of the blades (the spinning point) remains to a negative pitch, however, to the end of the blades, that changes to a positive pitch.
So the rotor chsnges from negative to positive at 90 % of rotation to provide directional control . Nice done
Is there enough space up there to attach a cat?
Vertical descent at 1:33. No dissymmetry of lift because of no forward speed.
very cool
What is the alpha (angle) relative to the axis? I allways wonder is it positive or negative?
negative. basically you can learn this by making a simple rotor from balsa wood, the hub can be made from a light alloy so it has a bit of flex. When offered to the air flow...say a good steady breeze....don't have the rotor level...cant it back a little. The breeze will push the negative pitch...rotor will rotate...as it speeds up you will feel the pull..or lift. Hope this helps.There is a little bit more to understand, as the blades turn...the advancing blade (in other words either blade in question, that's moving forward INTO the wind/airflow) will lift up slightly...relative to the plane/axis...so the length decreases...this is from blade tip to axis...this causes the blade to speed up a little and adds more energy.
I would think it's a bad idea to add weight the main rotors even if camera is in the center.
Nice one .....👍👍👍.....I have a question ...can any one explain any torque related issues in therms of the directions of turns between the engine props and the rotor blades
Gyro rotor blades are not powered therefor they produce no torque. Gyros have more in common with an airplane then a helicopter. The rotor blades are in constant autorotation.
Is rotor blade fatigue a concern? What is the lifespan os the blades?
These are RS 2 blades so lifed at 2500hrs but monitored at regular intervals, especially here in the UK. The RS 1 blades are lifed at 700 hrs
Is it viable to use coaxial rotor to deal with the assymetrical lift cause by retreating blade?
The simple answer is no. The rotor is NOT driven by the powerplant. Autorotative flight is driven solely by the wind flowing through the blades from below and upward. Thrust is provided by the powerplant (pusher) propelling the aircraft forward.
Nice !
Virgil Graham of
when this machine has some speed, doesnt the (fixed) rotor produce less lift on the left side?
Yes, that is true. To compensate this effect, the whole fuselage is mounted apporx. 2cm off center to the side in respect to the rotor axis. However, this compensation is only correct for one certain speed. For higher speeds the gyro always wants to roll to the left side, so you can´t fly without your hands on the stick.
Is the rotor blade flapping ?
What is the rotor blade made of alluminium ?
Is the blade hollow ?
Does the blade lead - lag
thanks
if at high speed , the gyro want sto roll left, so u cant remove your hand of the sticks then how do you roll right , isnt your stick partly already on the right side , i.e compensating for the auto roll onto the left side ?
It will flap, but will not Lead and Lag. Leading and Lagging is caused by the center of mass of the blade moving closer to, or farther from the rotation of axis. Think of a figure skater pulling her arms in to spin faster. With the 2 bladed underslung rotor head that this has as the blade flaps up, the effects of underslinging pushes the blade outwards keeping the CoM in relatively the same spot. Therefor the blade doesn't accelerate or decelerate as flapping occurs.
Is this a rigid rotor system?
My question is after landing how long does it take blades to stop rotating and is there a brake
I have never let the blades come to a stop without using the rotor brake but I guess they would stop rotating in 2-3 minutes. It is important to monitor the rotor speed after landing. If you are on smooth ground, you should stop the gyro when the rotor speed is down to approx 50rpm and apply the rotor brake to stop the rotors. If the ground is rough for example grass the gyro should be stopped when the rotors are slowing down to approx 100-150 rpm and on both occasions the stick must be fully forward
Every video I've seen says that the blades are not motor powered but they clearly are powered. Am I missing something?
The blades are prerotated before the start run with a shaft that is coupled to the motor. This shaft can withstand rotation up to approx. 200rpm. After prerotation the beginning of the start run is in fact a spinning up of the rotor to approx. 320rpm by the wind speed and then the gyro lifts off. So, yes, they are motor powered before start, but not while flying. In fact you can´t engage the prerotation in flight, because it can not withstand the load.
E agora?
I'm starting to have second thoughts about getting a gyro because of Blade Flap.
?? Where did U see that? Oooh I get it, we need to use reverse phycology w/that comment, duh🙄 sry I was slow w/that one!😜...
@@leanbean8376 The first summer I was working when I was 15 I found a Gyro Copter for only $550.. I bought it. I never flew it though. My parents made me sell it. It was a Handle Bar Gyro. My Uncle was killed on his first flight in a Gyro. A bolt in the Rotor falling out is what they determined as the cause of his death.
I was feeling like vomiting
Super
why do all the gyrocopters shake and vibrate so bad? Almost all the videos I watch show them shaking. Is it because the blades are not balanced that good?
Short answer: because gyro's stick controls are DIRECTLY linked to the rotor head (push/pull rods). With NO helicopter like 'mechanisms' to allow for more then blade flex.
Long answer:
All rotary wing aircraft suffer from what is know as 'differential lift'.
The advancing rotor blade creates more lift then the retreating blade; as well as the transitional area when the blades move into axial alignment with the motion (track) of the aircraft (ie. the blades are inline, neither advancing or retreating). This causes the blades to flex differently from each other, tilting the rotor head 'unevenly'.
Most helicopters are built to allow for blade flap and swing (as well as pitch compensation). Gyro's, classed as experimental or LSA, are NOT allowed to have variable pitch rotors. So can't compensate for blade forces like a helicopter can. The blades can flex, the entire rotor connection (the hub and 2 rotors, connected to the 'jesus pin') can pivot in ONE axis...but that's not the same thing as on a helicopter.
But because of the connection to the 'masthead' that is not all transfered through to the aircraft but rather into the stick (gyroplanes are pushrod connected, NO dampening system).
As the rotor blades and rotor head move/vibrate, so does the stick.
Because of the physical connection of the stick to the rotor head, unlike most helicopters that have some hydraulic connection (and more complex compensating design), the gyro's stick has to move with the rotor head. The rotor blades do move more then the rotor head does (as they're connected via ONE 'jesus pin' allowing for lifting tilt, but this does translate to small movements in the rotor head)
If the rotor blades were actually unbalanced, MORE then just the stick would shake. That WOULD transfer to the aircraft and not just the stick. So its rarely because of unbalanced rotor blades (assuming the blades were properly balanced to start with).
As I understand the physics of it all...I don't fly a gyroplane, but I'd love to.
I'm glad you wrote all that so I didn't have to. You pretty much nailed it! Stop wishing and get out and fly!
@@MrRocque Good answer, though. I love this kind of stuff, lol.
cool
Im sick and dizzy now...
LSD blade trip !
how to make a copter propeller
Guuleed aadan cabdi waa wiil sameyey diyaarado. Olive in buuhoodle
what is the warping effect?
If you mean the 'waves' in the image, it is when he has tilted the rotors back for better airflow through them like on take off and landing.
Lov lov god god nota 1000 adorei muito maneiro.
help!!! mom! I want off this ride!!!! I'm going to be sick!!!
my good :D
No blade movement (slight flapping) 😳 compared to helicopters 😳😳😳😳
Scream if you wanna go fasterrrr!!
Im going dizzy
to many vibrations - negative moment
headache
🎥👍🌟🌟🌟🌟🌟👏👏👏
Omg
😵😵😵😵
0:33 what is happening here, I understand Gyrocopters don't have a powered rotor?
The rotor gets a little push to help get the rotation started.
oo kkkkkk
😩😩😩
Anjir gwe posing
تصویر جایف
Puked.
HOW NAUSEATING. I AM SICK ALL OVER MY COMPUTER.
Fiquei tonto kkkkkk