How tight should RC Heli Blades be?
RC helicopter blades need to be tight enough so that they hold still when the craft is tilted sideways, and loose enough so that the blades fall downward only when shaken once strongly in the same sideways position. They should not be able to spin around loosely on their own, yet they should be moveable by hand.
Why do helicopter blades sag?
side of the aircraft. … Rotating helicopter blades are especially dangerous to people out- side the aircraft when the helicopter is being powered down and the centrip- etal force on the main-rotor blades is reduced, allowing them to droop closer to the ground.
How tight should main blades be?
Tighten enough so they hold when the heli is tilted sideways.. but loose enough so when you bounce the heli up and down they can move a bit. 1) like sly said, snug the blades up until they hold their own weight with the heli sideways.
What is the cause of rotor droop or blade droop?
When the rotor blades are at rest, they droop due to their weight and span. In fully articulated systems, they rest against a static or droop stop which prevents the blade from descending so low it will strike the aircraft (or ground!).
Can you get hit by a helicopter blade?
Rotor blade injuries are an inherent hazard of helicopter operations. Crash-related injuries were not included. During the study period, there were 24 blade strike injuries (12 involving the main rotor), 11 (46%) of which were fatal.
What is droop stop?
A device to limit downward vertical motion of helicopter rotor blades upon rotor shutdown. Dictionary of Military and Associated Terms.
How do droop stops work?
When a helicopter is at rest, the blades will droop because of a lack of centrifugal stiffening. These constructions function by using centrifugal forces to put the droop stops out of engagement. At a lower RPM, a string returns the droop stops.
Why should you not walk under a helicopter?
THE ROTOR SYSTEM OF THE HELICOPTER Never carry anything above your head such as an umbrella while walking under the rotor system. Even the lightest contact with the rotor blades on a helicopter may result in permanent damage to the aircraft.
Why do you crouch when approaching a helicopter?
If you are approaching the helicopter on level ground, walk toward the aircraft in a low crouch to allow for extra space between your body and the rotors. Be sure that all personal belongings, such as hats, are secure.
How is droop of a static rotor blade overcome on start up?
As the rotor head begins to spool up, centrifugal force overcomes the spring and rotates the Droop Stops out of the way so the blade has full vertical movement in flight.