AOPA Turbine Pilot Magazine - September 2019 - T-18
Operationally, the turbines are
far simpler and less temperamental. Minus 10 degrees out?
Fire it up without worrying
about preheat. Jet A is around
$1 per gallon cheaper than avgas,
but turbines burn substantially
more fuel, so it will always be a
major expense. In return, however, you get runway and climb
performance that puts a typical
piston twin to shame and vastly
increases takeoff safety.
Number-cruncher Steve surmised he could purchase a 1980
Piper Cheyenne II and own it for
a similar cost as their Aerostar.
After a few years of ownership,
his hunch has been verified, and
in the meantime, his family has a
safer, more capable and comfortable airplane.
With a total of 1,240 shaft horsepower on a
9,000-pound airframe, the takeoff and climb
performance advantage over the Aerostar is
significant. The penalty in fuel burn, on the
other hand, is equally significant. High-speed
cruise at FL190 is 260 KTAS on 80 gph and
long-range cruise at FL250 is 245 KTAS at 68
gph. That's about double the fuel burn of the
Aerostar. On the ground at idle, the Cheyenne
burns 30 gph. Depending on winds and power
T-18 | AOPA PILOT September 2019
setting, Steve figures an 800- to 1,000-nautical-mile range. Flight Level 210 to FL230 is a
good trade-off between speed and fuel burn.
Of course, with a turbine, winds are always a
big variable in planning. The Leffertses plan
on 575 pounds/86 gallons in the first hour
and 475 pounds/71 gallons per hour on subsequent hours at maximum cruise power.
On a flight from the Montgomery County
Airpark in Gaithersburg, Maryland, to the
John Glenn Columbus International Airport
in Ohio, the Cheyenne II burned
100 gallons of Jet A and put 1.2
clicks on the Hobbs. Most of
the cruise was at FL180 where
speed worked out to 257 KTAS
on 82 gph at our light weight
of 7,200 lbs. It was warmer
than standard and density altitude was 20,000 feet. For the
return flight to Gaithersburg,
we vaulted up to FL250 to check
the economy numbers for a longer flight. The Cheyenne II,
weighing about 8,000 pounds,
turned in a speed of 242 KTAS
on 66 gph with a density altitude of 27,100 feet.
Climb performance down
low is spectacular. Steve said
he nearly always climbs at 140
KIAS to turn in climb rates of 2,500 to 3,000
feet per minute. This gets the Cheyenne
to more economical altitudes as quickly as
possible and, once there, he can select the
power appropriate to the mission of the day.
Climb rate does peter out in the upper teens,
however. "The Aerostar can outclimb the
Cheyenne in the upper teens and is faster in
cruise in the mid 20s," Steve said.
What the Aerostar can't do is achieve
an accelerate-stop distance of 4,000 feet at
AOPA Turbine Pilot Magazine - September 2019
Table of Contents for the Digital Edition of AOPA Turbine Pilot Magazine - September 2019
Contents
AOPA Turbine Pilot Magazine - September 2019 - Intro
AOPA Turbine Pilot Magazine - September 2019 - Cover1
AOPA Turbine Pilot Magazine - September 2019 - Cover2
AOPA Turbine Pilot Magazine - September 2019 - 1
AOPA Turbine Pilot Magazine - September 2019 - 2
AOPA Turbine Pilot Magazine - September 2019 - Contents
AOPA Turbine Pilot Magazine - September 2019 - 4
AOPA Turbine Pilot Magazine - September 2019 - 5
AOPA Turbine Pilot Magazine - September 2019 - 6
AOPA Turbine Pilot Magazine - September 2019 - 7
AOPA Turbine Pilot Magazine - September 2019 - 8
AOPA Turbine Pilot Magazine - September 2019 - 9
AOPA Turbine Pilot Magazine - September 2019 - 10
AOPA Turbine Pilot Magazine - September 2019 - 11
AOPA Turbine Pilot Magazine - September 2019 - 12
AOPA Turbine Pilot Magazine - September 2019 - 13
AOPA Turbine Pilot Magazine - September 2019 - 14
AOPA Turbine Pilot Magazine - September 2019 - 15
AOPA Turbine Pilot Magazine - September 2019 - 16
AOPA Turbine Pilot Magazine - September 2019 - 17
AOPA Turbine Pilot Magazine - September 2019 - 18
AOPA Turbine Pilot Magazine - September 2019 - 19
AOPA Turbine Pilot Magazine - September 2019 - 20
AOPA Turbine Pilot Magazine - September 2019 - 21
AOPA Turbine Pilot Magazine - September 2019 - 22
AOPA Turbine Pilot Magazine - September 2019 - 23
AOPA Turbine Pilot Magazine - September 2019 - 24
AOPA Turbine Pilot Magazine - September 2019 - 25
AOPA Turbine Pilot Magazine - September 2019 - 26
AOPA Turbine Pilot Magazine - September 2019 - 27
AOPA Turbine Pilot Magazine - September 2019 - 28
AOPA Turbine Pilot Magazine - September 2019 - 29
AOPA Turbine Pilot Magazine - September 2019 - 30
AOPA Turbine Pilot Magazine - September 2019 - 31
AOPA Turbine Pilot Magazine - September 2019 - 32
AOPA Turbine Pilot Magazine - September 2019 - 33
AOPA Turbine Pilot Magazine - September 2019 - 34
AOPA Turbine Pilot Magazine - September 2019 - 35
AOPA Turbine Pilot Magazine - September 2019 - 36
AOPA Turbine Pilot Magazine - September 2019 - 37
AOPA Turbine Pilot Magazine - September 2019 - 38
AOPA Turbine Pilot Magazine - September 2019 - 39
AOPA Turbine Pilot Magazine - September 2019 - 40
AOPA Turbine Pilot Magazine - September 2019 - 41
AOPA Turbine Pilot Magazine - September 2019 - 42
AOPA Turbine Pilot Magazine - September 2019 - 43
AOPA Turbine Pilot Magazine - September 2019 - 44
AOPA Turbine Pilot Magazine - September 2019 - 45
AOPA Turbine Pilot Magazine - September 2019 - 46
AOPA Turbine Pilot Magazine - September 2019 - 47
AOPA Turbine Pilot Magazine - September 2019 - 48
AOPA Turbine Pilot Magazine - September 2019 - T-1
AOPA Turbine Pilot Magazine - September 2019 - T-2
AOPA Turbine Pilot Magazine - September 2019 - T-3
AOPA Turbine Pilot Magazine - September 2019 - T-4
AOPA Turbine Pilot Magazine - September 2019 - T-5
AOPA Turbine Pilot Magazine - September 2019 - T-6
AOPA Turbine Pilot Magazine - September 2019 - T-7
AOPA Turbine Pilot Magazine - September 2019 - T-8
AOPA Turbine Pilot Magazine - September 2019 - T-9
AOPA Turbine Pilot Magazine - September 2019 - T-10
AOPA Turbine Pilot Magazine - September 2019 - T-11
AOPA Turbine Pilot Magazine - September 2019 - T-12
AOPA Turbine Pilot Magazine - September 2019 - T-13
AOPA Turbine Pilot Magazine - September 2019 - T-14
AOPA Turbine Pilot Magazine - September 2019 - T-15
AOPA Turbine Pilot Magazine - September 2019 - T-16
AOPA Turbine Pilot Magazine - September 2019 - T-17
AOPA Turbine Pilot Magazine - September 2019 - T-18
AOPA Turbine Pilot Magazine - September 2019 - T-19
AOPA Turbine Pilot Magazine - September 2019 - T-20
AOPA Turbine Pilot Magazine - September 2019 - 49
AOPA Turbine Pilot Magazine - September 2019 - 50
AOPA Turbine Pilot Magazine - September 2019 - 51
AOPA Turbine Pilot Magazine - September 2019 - 52
AOPA Turbine Pilot Magazine - September 2019 - 53
AOPA Turbine Pilot Magazine - September 2019 - 54
AOPA Turbine Pilot Magazine - September 2019 - 55
AOPA Turbine Pilot Magazine - September 2019 - 56
AOPA Turbine Pilot Magazine - September 2019 - 57
AOPA Turbine Pilot Magazine - September 2019 - 58
AOPA Turbine Pilot Magazine - September 2019 - 59
AOPA Turbine Pilot Magazine - September 2019 - 60
AOPA Turbine Pilot Magazine - September 2019 - 61
AOPA Turbine Pilot Magazine - September 2019 - 62
AOPA Turbine Pilot Magazine - September 2019 - 63
AOPA Turbine Pilot Magazine - September 2019 - 64
AOPA Turbine Pilot Magazine - September 2019 - 65
AOPA Turbine Pilot Magazine - September 2019 - 66
AOPA Turbine Pilot Magazine - September 2019 - 67
AOPA Turbine Pilot Magazine - September 2019 - 68
AOPA Turbine Pilot Magazine - September 2019 - 69
AOPA Turbine Pilot Magazine - September 2019 - 70
AOPA Turbine Pilot Magazine - September 2019 - 71
AOPA Turbine Pilot Magazine - September 2019 - 72
AOPA Turbine Pilot Magazine - September 2019 - 73
AOPA Turbine Pilot Magazine - September 2019 - 74
AOPA Turbine Pilot Magazine - September 2019 - 75
AOPA Turbine Pilot Magazine - September 2019 - 76
AOPA Turbine Pilot Magazine - September 2019 - 77
AOPA Turbine Pilot Magazine - September 2019 - 78
AOPA Turbine Pilot Magazine - September 2019 - 79
AOPA Turbine Pilot Magazine - September 2019 - 80
AOPA Turbine Pilot Magazine - September 2019 - 81
AOPA Turbine Pilot Magazine - September 2019 - 82
AOPA Turbine Pilot Magazine - September 2019 - 83
AOPA Turbine Pilot Magazine - September 2019 - 84
AOPA Turbine Pilot Magazine - September 2019 - 85
AOPA Turbine Pilot Magazine - September 2019 - 86
AOPA Turbine Pilot Magazine - September 2019 - 87
AOPA Turbine Pilot Magazine - September 2019 - 88
AOPA Turbine Pilot Magazine - September 2019 - 89
AOPA Turbine Pilot Magazine - September 2019 - 90
AOPA Turbine Pilot Magazine - September 2019 - 91
AOPA Turbine Pilot Magazine - September 2019 - 92
AOPA Turbine Pilot Magazine - September 2019 - 93
AOPA Turbine Pilot Magazine - September 2019 - 94
AOPA Turbine Pilot Magazine - September 2019 - 95
AOPA Turbine Pilot Magazine - September 2019 - 96
AOPA Turbine Pilot Magazine - September 2019 - 97
AOPA Turbine Pilot Magazine - September 2019 - 98
AOPA Turbine Pilot Magazine - September 2019 - 99
AOPA Turbine Pilot Magazine - September 2019 - 100
AOPA Turbine Pilot Magazine - September 2019 - 101
AOPA Turbine Pilot Magazine - September 2019 - 102
AOPA Turbine Pilot Magazine - September 2019 - 103
AOPA Turbine Pilot Magazine - September 2019 - 104
AOPA Turbine Pilot Magazine - September 2019 - 105
AOPA Turbine Pilot Magazine - September 2019 - 106
AOPA Turbine Pilot Magazine - September 2019 - 107
AOPA Turbine Pilot Magazine - September 2019 - 108
AOPA Turbine Pilot Magazine - September 2019 - 109
AOPA Turbine Pilot Magazine - September 2019 - 110
AOPA Turbine Pilot Magazine - September 2019 - 111
AOPA Turbine Pilot Magazine - September 2019 - 112
AOPA Turbine Pilot Magazine - September 2019 - Cover3
AOPA Turbine Pilot Magazine - September 2019 - Cover4
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