- What is the purpose of a turnbuckle?
- What causes flutter in aircraft?
- What does aeroelastic flutter mean?
- Why do aircraft use control cables?
- How many types of rigging are there?
- What is rigging specification?
- What is the cause of control surfaces vibration?
- What is a fairlead aviation?
- What is the smallest size cable that may be used in aircraft primary control systems?
- What does rigging mean?
- What is the difference between aircraft assembly and rigging?
- How do you stop airplane flutters?
- What is the purpose of aircraft rigging?
- How does a cable tension regulator work?
- How do you check aircraft cable tension?
- What are the types of rigging?
- What is cable rigging?
What is the purpose of a turnbuckle?
A turnbuckle, stretching screw or bottlescrew is a device for adjusting the tension or length of ropes, cables, tie rods, and other tensioning systems.
It normally consists of two threaded eye bolts, one screwed into each end of a small metal frame, one with a left-hand thread and the other with a right-hand thread..
What causes flutter in aircraft?
Aeroelastic flutter involves the unfavorable interaction of aerodynamic, elastic, and inertia forces on structures to produce an unstable oscillation that often results in struc- tural failure. High-speed aircraft are most susceptible to flutter although flutter has occurred at speeds of 55 mph on home-built aircraft.
What does aeroelastic flutter mean?
Aeroelastic flutter, defined as “an unstable, self-excited structural oscillation at a definite frequency where energy is extracted from the airstream by the motion of the structure”, is ubiquitous in a wide range of engineering fields.
Why do aircraft use control cables?
It is strong and light weight, and its flexibility makes it easy to route through the aircraft. An aircraft cable has a high mechanical efficiency and can be set up without backlash, which is very important for precise control.
How many types of rigging are there?
There are two broad categories of shackles, anchor and chain, but both of these categories can also include different types of shackles: screw pin, safety, and round pin types.
What is rigging specification?
Rigging Specifications It lists the limitations and information required for type certification, including airspeed limits, weight limits, control surface movements, engine make and model, minimum crew, fuel type, thrust limits, rpm limits, etc., and the various components eligible for installation on the product.
What is the cause of control surfaces vibration?
Abnormal vibration usually is related to one or more of the following causes: engine rotor imbalance, malfunction of mechanical equipment, and airflow disturbances acting over doors or control surfaces that are misrigged or misfaired or that have excessive wear or free play.
What is a fairlead aviation?
Fairlead. A plastic or wooden guide used to prevent a steel control cable rubbing against an aircraft structure.
What is the smallest size cable that may be used in aircraft primary control systems?
1/8 inchWhat is the smallest size cable that may be used in aircraft primary control systems? 1/8 inch. to manufacturer’s specifications.
What does rigging mean?
1a : lines and chains used aboard a ship especially in working sail and supporting masts and spars. b : a similar network (as in theater scenery) used for support and manipulation. 2 : clothing.
What is the difference between aircraft assembly and rigging?
The assembly of an aircraft refers to the joining of parts or subassemblies by various means until the entire aircraft is in condition for operation. Rigging is the alignment of aircraft parts or sections to obtain proper flight characteristics.
How do you stop airplane flutters?
Aeroelasticity problems can be prevented by adjusting the mass, stiffness or aerodynamics of structures which can be determined and verified through the use of calculations, ground vibration tests and flight flutter trials. Flutter of control surfaces is usually eliminated by the careful placement of mass balances.
What is the purpose of aircraft rigging?
Rigging is the proper installation of airframe components (wings, ailerons and tail surfaces) designed to do a specific aerodynamic job and contribute to the aircraft’s overall performance, stability and safety.
How does a cable tension regulator work?
Some large aircraft incorporate tension regulators in the control cable systems to maintain a given cable tension automatically. The unit consists of a compression spring and a locking mechanism that allows the spring to make correction in the system only when the cable system is in neutral.
How do you check aircraft cable tension?
To determine the amount of tension on a cable, a tensiometer is used. When properly maintained, a tensiometer is 98 percent accurate. Cable tension is determined by measuring the amount of force needed to make an offset in the cable between two hardened steel blocks called anvils.
What are the types of rigging?
The following are the six most important rigging hardware used for crane operations.Rigging Hooks. Hooks used in rigging are designed to lift heavy objects and eliminate slippage, depending on the materials being moved. … Shackles. … Eye Bolts & Steel Nuts. … Wire Ropes. … Synthetic Slings. … Pulleys & Blocks.
What is cable rigging?
Rigging comprises the system of ropes, cables and chains, which support a sailing ship or sail boat’s masts—standing rigging, including shrouds and stays—and which adjust the position of the vessel’s sails and spars to which they are attached—the running rigging, including halyards, braces, sheets and vangs.