Pipistrel ALPHA Trainer User Manual

ALPHA Trainer www.pipistrel-aircraft.com
REV. 0
POH-162-00-40-050
5-4
Performance
Effect of the wind
Wind (head, cross or tailwind) affects aircraft’s ground speed (GS).
Headwind on takeoff or landing causes the takeoff and landing distance length to shorten as the GS is
smaller during these two flight stages. The opposite holds true for tailwind on takeoff and landing as
tailwind prolongs takeoff and landing distances significantly.
Headwind shortens takeoff and landing distances by 25 feet (8 meters) with every 3 kts
(5 km/h) of wind increase (e.g. provided there is a 6 kts (10 km/h) headwind on takeoff and landing,
distances will be approximately 50 ft (16 meters) shorter than ones published in the manual).
Tailwind prolongs takeoff and landing distances by 60-65 feet (18-20 meters) with every 3 kts (5 km/h)
wind increase (e.g. provided there is a 6 kts (10 km/h) tailwind on takeoff or landing, distances will be
approximately 120-130 feet (36-40 meters) longer then ones published in the manual).
WARNING! Tailwind affects takeoff and landing performance by more than twice as much
as headwind does.
The table below provides data about the effect of headwind (+) and tailwind (-) on takeoff runway
length (referenced for sea level conditions, airplane at MTOM). Relative effect is maintained at any
elevation.
Windspeed (kts) -6 -4 -2 0 4 8 12
Takeoff runway length [ft]
ALPHA Trainer
680 645 605 555 525 495 480
Takeoff distance over 50 ft / 15 m obstacle [ft]
ALPHA Trainer
1130 1065 965 870 810 760 720
Effect of outside air temperature
The table below provides data about the effect of outside temperature on takeoff runway length.
Data is referenced for sea level performance at MTOM.
Temperature (°F) 59 68 77 86 95
Takeoff runway length [ft]
ALPHA Trainer 555 670 820 935 1020
Takeoff distance over 50 ft / 15 m obstacle [
ft]
ALPHA Trainer 870 965 1045 1280 1410
Temperature (°C) 32 41 50
Takeoff runway length [ft]
ALPHA Trainer 960 1090 1220
Takeoff distance over 50 ft / 15 m obstacle [
ft]
ALPHA Trainer 1360 1460 1620

Pipistrel ALPHA Trainer Specifications

General

Manufacturer	Pipistrel
Model	ALPHA Trainer
Aircraft Type	Light Sport Aircraft
Horsepower	80 hp
Seating Capacity	2
Engine	Rotax 912
Length	6.5 m
Maximum Takeoff Weight	550 kg
Cruise Speed	108 knots
Range	1000 km
Propeller	Fixed Pitch