TM 55-1510-215-10
GROUND CLEARANCES
VERTICAL STABILIZER
14 FT 2.56 IN
WING TIPS
6 FT 8 IN
UPPER BLADE
8 FT 9 IN
12 IN
LOWER BLADE
WINGSPAN
45 FT 10.5 IN
LENGTH
35 FT 6 IN
Figure 2-4. Turning Radius and Ground Clearance
centered and the rudder pedals relieved of the steering
c. Landing Gear Position Warning Lights. Two red
load when the landing gear is retracted. Air-oil type
bulbs, wired in parallel, are positioned inside the clear
shock struts, filled with compressed air and hydraulic
plastic grip on the landing gear control handle (fig. 2-7).
fluid, are incorporated with the landing gear. Gear
These lights illuminate whenever the landing gear
extension or retraction time should take no longer than 8
handle is in either the UP or DN position and the gear is
seconds.
in transit. Both bulbs will also illuminate should either or
both power levers be retarded below approximately 50%
a. Landing Gear Control Switch. Landing gear
of lever travel when the landing gear is not down and
system operation is controlled by a manually actuated
locked. To turn the handle lights OFF, during single-
wheel-shaped switch placarded LDG GEAR CONT, UP
engine operation, the power lever for the inoperative
and DN, on the right subpanel (fig. 2-19). The control
engine must be advanced to a position which is higher
switch and associated relay circuits are protected by a 5-
than the setting of the warning horn microswitch.
ampere circuit breaker, placarded LDG GR CONTROL,
Extending the landing gear will also turn the lights off.
on the right subpanel (fig. 2-19).
Both red lights indicate the same warning conditions, but
two are provided for a fail-safe indication in the event
b. Landing Gear Down Position-Indicator Lights.
one bulb burns out. The circuit is protected by a 5-
Landing gear down position is indicated by three green
ampere circuit breaker, placarded LDG GR CONTROL,
lights on the control pedestal, placarded GEAR DOWN
on the right subpanel (fig. 2-7).
circuit is protected by a 5-ampere circuit breaker,
d. Landing Gear Warning Light Test Button. A test
placarded LG IND, on the right subpanel.
button, placarded HDL LT TEST, is located on the right
subpanel (fig. 2-7). Failure of the landing gear handle to
2-5
