Tuesday, June 9, 2015
FREE AVIATION STUDY: AERODYNAMICS
FREE AVIATION STUDY: AERODYNAMICS: AIR AT REST, THE ATMOSPHERE AND STATIC LIFT Density Pressure The Hydrostatic Equation Measurement of Small Pressure Differences ...
FREE AVIATION STUDY: AERODYNAMICS
FREE AVIATION STUDY: AERODYNAMICS: AIR AT REST, THE ATMOSPHERE AND STATIC LIFT Density Pressure The Hydrostatic Equation Measurement of Small Pressure Differences ...
FREE AVIATION STUDY: Aircraft Weight and Balance
FREE AVIATION STUDY: Aircraft Weight and Balance: Weight and Balance Control Effects of Weight Weight Changes Stability and Balance Control Weight Control for Aircraft oth...
FREE AVIATION STUDY: DEICING SYSTEMS: GENERAL
FREE AVIATION STUDY: DEICING SYSTEMS: GENERAL: Deicing Systems: GENERAL As said in week 1, deicing systems remove the ice after it has formed, by the use of pneumatic deicer boots o...
FREE AVIATION STUDY: RubberDeicer Boot System Airline flying was hinde...
FREE AVIATION STUDY: RubberDeicer Boot System
Airline flying was hinde...: Rubber Deicer Boot System Airline flying was hindered in the early days of aviation because of aircraft ice accumulation. Pilots did...
Airline flying was hinde...: Rubber Deicer Boot System Airline flying was hindered in the early days of aviation because of aircraft ice accumulation. Pilots did...
FREE AVIATION STUDY: RubberDeicer Boot System Airline flying was hinde...
FREE AVIATION STUDY: RubberDeicer Boot System
Airline flying was hinde...: Rubber Deicer Boot System Airline flying was hindered in the early days of aviation because of aircraft ice accumulation. Pilots did...
Airline flying was hinde...: Rubber Deicer Boot System Airline flying was hindered in the early days of aviation because of aircraft ice accumulation. Pilots did...
FREE AVIATION STUDY: Source Of Operating Air
FREE AVIATION STUDY: Source Of Operating Air: 1. On many smaller turbine aircraft the source of pneumatic air is from the turbine engine compressor bleed air. This air is unde...
FREE AVIATION STUDY: Aircraft Deicing System Components
FREE AVIATION STUDY: Aircraft Deicing System Components: Deicing System Components (typical): Some of the main components in a pneumatic deicer system are the air pump (vacuum pump), vacuum regu...
FREE AVIATION STUDY: Deicing System Components (typical)
FREE AVIATION STUDY: Deicing System Components (typical): Deicing System Components (typical): Some of the main components in a pneumatic deicer system are the air pump (vacuum pump), vacuum ...
Aircraft ELECTRO THERMAL PROPELLER DEICING
ELECTRO
THERMAL Propeller Deicing
Many of
the modern propellers installed on both reciprocating and turboprop engines are
deiced with an electro thermal deicer system. Rubber boots with heater wires
embedded in the rubber are bonded to the leading edges of the propeller blades,
and electrical current is passed through these wires to heat the rubber and
melt any ice that has formed, so centrifugal force and wind can carry the ice
away.
The boots in some installations are
made in two sections on each blade. Current flows for about a half minute
through the outboard section of all blades and then for the same time through
the heaters on the inboard section of all of the blades. The time the current flows
have been proven by flight tests to be sufficient to allow ice to form over the
inactive section and long enough to loosen the ice from the section that is
receiving the current.
The
complete propeller deicer system, shown in Figure
6.7, consists of the following
components:
1. Electrically heated deicers bonded to the propeller blades.
2. Slip-ring and brush block assemblies that carry the current
to the rotating propeller.
3. Timer to control the heating time and sequence of the
deicing cycle.
4. An ammeter to indicate the operation of the system.
5. All of the wiring, switches and circuit breakers necessary
to conduct electrical power from the aircraft electrical system into the deicer
system.
The slip-ring assembly is mounted on
the propeller either through a specially adapted starter gear, or attached to
the spinner bulkhead or the crankshaft flange. The brush block is mounted on
the engine so the three brushes will ride squarely on the slip rings. The timer
controls the sequence of current to each of the deicers. The sequence of
heating is important, to provide the best loosening of the ice so it can be
carried away by the centrifugal force. It is also important that the same
portion of each blade be heated at the same time, to prevent an out-of-balance
condition.
Subscribe to:
Posts (Atom)