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T.O. BMS1F-16CM-1
BMS 4.34 Change 2.00
BMS 4.34 Dash 1
© Red Dog 2012-2019
Page: 141
1.13 LANDING GEAR & BRAKES
The Landing Gear is operated by hydraulic system B and consists of two main landing gears (MLG)
and a nose wheel (NLG). When hydraulic system B is inoperative the gear can be lowered once
pneumatically with the alternate gear handle located outboard of the left auxiliary console. Once
depleted, pneumatic pressure cannot be restored but the reset button allows retracting the gear after
an alternate extension if system B hydraulic power becomes available again.
The main landing gear handle is the primary control to extend and retract the gear. A red warning light
is located in the lollipop and comes on whenever the gear and doors are in transit or when the landing
gear has failed (open or closed). The lollipop warning light also comes on when the TO/LDG CONFIG
warning light (right eyebrow) comes on. The conditions are airspeed less than 190 knots, rate of
descent greater than 250 ft/min, altitude less than 10000 feet and any gear leg is not down and
locked. The gear operating limit speed is 305 knots. All gear legs must be retracted before reaching
that speed to prevent gear damage or failure in flight.
On the ground the gear is locked in place mechanically and cannot be retracted (unless using the DN
LOCK REL button prior to raising the handle but that is not implemented in BMS).
A switch is activated when there is weight on wheels (WOW) that activates or deactivates aircraft
systems depending on if the aircraft is on the ground or in flight.
1.13.1. Nose Wheel Steering
The nose wheel can be steered on the ground when the NWS system is active. Nose wheel steering is
powered by hydraulic system B and as such is not available after an alternate gear extension.
The NWS A/R MSL STEP button on the stick toggles NWS on and off when there is WOW. A green
NWS light illuminates on the right indexer when the NWS is engaged. Nose wheel steering is
automatically disengaged when the nose landing gear strut is extended but the NWS should be
manually disengaged above 70 knots to avoid uncontrolled nose wheel rotation on the take-off and
landing roll. Failure of the NWS is indicated by the NWS FAIL caution light.
1.13.2. Wheel brakes
BMS features two types of wheel brakes for users with or without rudder equipped toe brakes.
Users without toe brakes (or using no rudder at all) have a wheel brake implemented by a keystroke
that brakes both main landing gear wheels at the same time.
Users using rudders with toe brakes can program differential brakes as axes in the UI controller setup.
In this case each main landing gear wheel can brake separately, allowing steering on the ground.
Brake hydraulic power is supplied by system B. There is no emergency brake implemented in BMS. In
the real jet the JFS accumulator is able to power the brakes in case of a dead stick landing. To
overcome the issue BMS toebrakes remain active even when the aircraft is running on EPU.
BMS features accurate brake energy limits based on gross weight, temperature, pressure altitude and
speed. Brakes generate a great deal of heat when used and uncontrolled heat build-up can lead to
brake melting, tyre blow-outs, brake hydraulic pressure failure and even landing gear failure. As a
consequence it is important in BMS to use the wheel brakes correctly.
Brake heat builds up not only on rejected takeoff and landing but also when taxiing. An F-16 with a low
gross weight can start moving and even accelerating in idle power and brakes will be required to
control taxi speed. Heavy use of the brakes when taxiing will increase brake heat energy build up.
A higher gross-weight F-16 will not move on idle power, thus requiring less braking to control taxi
speed.
For comparison a 20000 lbs GW F-16 taxied at 10 knots over 20000 feet will develop around 4.3
million ft-lbs energy needing to be absorbed by the brakes. The yellow caution zone in the graph
below starts at 11.5 million ft-lbs energy. If a rejected takeoff follows a heavy braking taxi, brake
problems are likely to happen.
It takes about 5 to 9 minutes for the brake energy to build up after braking; that is when problems may
occur. To avoid problems real life taxi procedures should be followed:
Содержание F-16C/D 4.34
Страница 10: ...T O BMS1F 16CM 1 BMS 4 34 Change 2 00 BMS 4 34 Dash 1 Red Dog 2012 2019 Page 10 INTENTIONALLY LEFT BLANK ...
Страница 13: ...T O BMS1F 16CM 1 BMS 4 34 Change 2 00 BMS 4 34 Dash 1 Red Dog 2012 2019 Page 13 1 2 COCKPIT ARRANGEMENT ...
Страница 15: ...T O BMS1F 16CM 1 BMS 4 34 Change 2 00 BMS 4 34 Dash 1 Red Dog 2012 2019 Page 15 1 2 1 LEFT CONSOLE ...
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Страница 31: ...T O BMS1F 16CM 1 BMS 4 34 Change 2 00 BMS 4 34 Dash 1 Red Dog 2012 2019 Page 31 1 2 2 LEFT AUXILIARY CONSOLE ...
Страница 37: ...T O BMS1F 16CM 1 BMS 4 34 Change 2 00 BMS 4 34 Dash 1 Red Dog 2012 2019 Page 37 1 2 3 CENTRE CONSOLE ...
Страница 50: ...T O BMS1F 16CM 1 BMS 4 34 Change 2 00 BMS 4 34 Dash 1 Red Dog 2012 2019 Page 50 1 2 4 RIGHT AUXILIARY CONSOLE ...
Страница 53: ...T O BMS1F 16CM 1 BMS 4 34 Change 2 00 BMS 4 34 Dash 1 Red Dog 2012 2019 Page 53 1 2 5 RIGHT CONSOLE ...
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Страница 160: ...T O BMS1F 16CM 1 BMS 4 34 Change 2 00 BMS 4 34 Dash 1 Red Dog 2012 2019 Page 160 INTENTIONALLY LEFT BLANK ...
Страница 161: ...T O BMS1F 16CM 1 BMS 4 34 Change 2 00 BMS 4 34 Dash 1 Red Dog 2012 2019 Page 161 SECTION II NORMAL PROCEDURES ...
Страница 163: ...T O BMS1F 16CM 1 BMS 4 34 Change 2 00 BMS 4 34 Dash 1 Red Dog 2012 2019 Page 163 F 16 b50 52 cockpit layout and panels ...
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Страница 177: ...T O BMS1F 16CM 1 BMS 4 34 Change 2 00 BMS 4 34 Dash 1 Red Dog 2012 2019 Page 177 KC 10 Diagrams ...
Страница 226: ...T O BMS1F 16CM 1 BMS 4 34 Change 2 00 BMS 4 34 Dash 1 Red Dog 2012 2019 Page 226 SECTION IV FLIGHT CHARACTERISTICS ...