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apparently plentiful fuel load.
IF YOU REMEMBER NOTHING
ELSE ABOUT A LONGRANGER
FUEL SYSTEM, REMEMBER
THIS………………
REGARDLESS OF THE FUEL
QUANTITY INDICATION, IF
THE FUEL LOW WARNING
LIGHT ILLUMINATES,
BELIEVE IT, LAND, AND
CONTACT AN ENGINEER.
Limitations And Data
These refer to the basic models –
there may be additional restrictions
from optional equipment which will
be covered by flight supplements in
the back of the Flight Manual.
Bell
206A
Bell
206B
Bell
206L
Max AUW 3 000
lbs
3 200
lbs
4050
lbs*
External Load 3350
lbs**
4250
lbs
Max alt (PA) 20
000'
20 000' 20
000'
Min front seat
weight
150
lbs
150/170
lbs
170
lbs
Max weight bge
compartment
250
lbs***
250
lbs***
250
lbs***
VNE Power on
< 3000 lbs
reduce by 4 per
1000 feet
150
mph
150
mph
150
mph
VNE Power on
> 3000 lbs
reduce by 8 per
1000'
140
mph
140
mph
140
mph
VNE auto 115
mph
115
mph
115
mph
VNE 1 or both
aft doors off
reduce by 1 per
1000 feet
100
mph
100
mph
100
mph
VNE fwd doors
off
reduce by 1 per
1000 feet
80
mph
80 mph 100
mph
VNE above
85% Torque
92
mph
92 mph
Min safe climb
speed
47
mph
47 mph 53
mph
Best ROC 55
mph
55 mph 60
mph
Max Xwind 20
mph
20 mph 20
mph
Max sideways 20
mph
20 mph 20
mph
Max rearwards 20
mph
20 mph 20
mph
*depends on yoke modification state ** C20B
***150 lbs with range extender
C20 C20B
Rotor – Power On
<3000 lbs
95-
100%
97-
100%
Rotor – Power On
>3000 lbs
97-
100%
97-
100%
148 The Helicopter Pilot’s Handbook
C20 C20B
Rotor Transient
Minimum
95% 5
sec
95% 5
sec
Rotor Power Off 90-
107%
90-
107%
Power Turbine (N2)
Power On
< 3000 lbs, < 8000 feet
95-
100%
97-
100%
Power Turbine (N2)
Power On
< 3000 lbs, > 8000 feet
97-
100%
97-
100%
Power Turbine (N2)
Power On
> 3000 lbs
97-
100%
97-
100%
Gas producer (N1)
Max
104% 104%
Gas producer (N1)
Max transient
104-
105%
15 sec
104-
105%
10 sec
Gas producer (N1)
Normal
60-
104%
60-
104%
Gas producer (N1)
Flight Idle
61-63% 61-63%
Torque takeoff 100% 5
min
100% 5
sec
Torque transient 110% 5
sec
110% 5
sec
Torque max
continuous
85% 85%
TOT continuous 330-737 330-738
TOT takeoff max 737-793
5 mins
738-810
TOT power transient 793-843
6 sec
810-843
TOT startup max 793-927
10 sec
810-927
Fuel pressure 4-30 psi 4-30 psi
Oil press < 78.5% N1 50-90
psi
50-90
psi
Oil pressure 78.5-
94.2% N1
90-115
psi
90-115
psi
Oil pressure >94.2%
N1
115-130
psi
115-130
psi
Transmission oil
pressure
107-110
psi
107-110
psi
Max for use of anti ice 4 degs
C
4 degs
C
Max generator load
before eqpt
.5 .5
C20 C20B
switched on
Max generator load .7 .7
The power turbine can overspeed
for up to 15 seconds, the actual time
depending on a graph in the Flight
Manual.
The fuel pump caution light comes
on if one or both fuel boost pumps
fail. If one goes, reduce altitude to
below 6000 feet. You will see the
pressure drop if both fail. If a single
pump fails, your unuseable fuel
becomes 10 US gals, and an unusual
attitude with that little fuel may
cause the pump to be exposed and
start sucking air instead.
Anti-ice should be off for startup
and on for flight in visible moisture
below 4.4 degs C. N1 and TOT will
rise when it is on.
The restriction in forward speed
with doors off is there because the
airflow becomes disturbed around
　
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本文鏈接地址：The Helicopter Pilot’s Handbook(98)