Eurocopter AS 350 83 Flight Manual page 376

~.,:I.."';)\":::" '"." -:-
~
;.i~ii;;;~,*'"
~
,';;;~ilij.~
'i.;;~:~"'j.\'"'!;;t
.' 'Ai\~f;.~\',:;:"
')i.1~'~" ..!.~~
"'i"4!;-';"~;;'
;~~'i)':' OPERATIONAL TIPS FOR A STAR OPERATORS
r"
;7 J Here is a q~ick review of how to count cycles on the Arriel engines. The pilot should record both power turbine
and gas turbine cycles with each entry made in the flight log book.
I. Powe-r Turbine (Np)
Power turbine cycles are straightforward: 1 FLIGHT = 1 CYCLE
where a flight is: One start followed by
One engine acceleration to take off power followed by
One shutdown.
2. Gas Turbine (Ng)
Gas turbine cycles are calculated using the following formula: Ng Cycles = Kl + K2 calculations
where KI is the coefficient from table 1 colTesponding to the maximum Ng reached during the flight
and K2 is the coefficient from table 2 colTesponding to the Minimum Ng reached at or below 85%
during the flight.
TABLE! TABLE 2
Max Ng Kl Min Ng K2
~--j durina fli ht Coefficient at or below Coefficient
100 1.0 85%
99 0.9 81-85 .05
98 0.8 76-80 .10
97 0.7 75 & lower .15
96
95 0.6 Notes:
94 0.55 1. Do not include the Ng reached as part of the normal shut
93 or lower 0.5 down
2. Do not count any cycles for ground runs (Np orNg).
Example:
100% 100%
%
Ng noted during flight \
80% on Approach
\
To Land
Start Up &
Shut Down
Max Ng during flight = 100% Kl = 1.0 Ng cycles = 1.0 + (2 x 0.05) + .10 = 1.20
) Min Ng during flight = two times at 82% K2 = 2 x 0.05
one time at 80% K2 = .10 Np cycles = 1.0
L
___~ .~~ ~:~.~ -
.
eurocopter
canada