P1 and Tuesday assigned learning Flashcards
Max TQ available (on PPC)
maximum amount of power that the engine can produce under the maximum environmental conditions while maintaining the rotor at the desired RPM
When must the PPC be recomputed?
When there is an increase of 1. _____ 2. _____ 3. _____
free air temperature of 5 degree celsius or more
pressure altitude of 500 feet or more
gross weight of 91kg/ 200lbs or more
What does the GO/NO GO TQ for IGE and OGE represent?
the torque you could expect to see, at a 3 foot hover, if the aircraft weighed the computed Max GWT IGE/OGE
What can make the aircraft actual hover torque different from the predicted hover tq
- increase or decrease in current free air temperature
- increase or decrease in current pressure altitude
- increase or decrease in aircraft gross weight
- hovering of uneven terrain
- hovering higher or lower than 3 feet
- a head or tail wind
What does the H/V altitude provide?
A minimum OGE altitude at which a safe landing can be made under OEI
what would you expect to see while flying minimum or maximum OEI airspeed while OEI?
12 FLI
what would happen if you tried to fly slower than minimum or faster than maximum OEI airspeed while under OEI
the FLI would re-reference N1 and TOT and the rotor would drop below the desired RPM resulting in a loss of altitude
Dynamic rollover: Definition and 3 conditions required
the susceptibility of a helicopter to a literal tolling tendency
- pivot point
- rolling motion
- exceeding the critical angle
physical factors to prevent dynamic rollover (7)
- main rotor thrust
- tail rotor thrust
- center of gravity
- crosswind component
- ground surface
- sloped landing area
- low fuel
human factors of dynamic rollover
5
- inexperience
- inattention
- failure to take timely corrective action
- inappropriate control input
- loss of visual reference
what should you do in the onset of dynamic rollover?
a smooth and moderate collective decrease is recommended
transverse flow definition
difference in flow between the forward and aft portion of the rotor system recognizable by a vibration , resulting in a right rolling motion due to gyroscopic precession
when does transverse flow occur?
between 10 and 20kts most noticeably during takeoff but also during deceleration and landing
what actions must a pilot take when transverse flow occurs?
left cyclic input
dissymmetry of lift
the difference in lift between the advancing half and the retreating half of the rotor system due to the difference of air velocity and surface area (no lift areas)
