Grob ASTIR CS 77 - NORMAL FLYING OPERATION PROCEDURES; Winch Launch Procedure; Aerotow Launch Procedure

Relationship between indicated and calibrated air speed
From this diagram the airspeed error can be obtained. This is due to the positioning of
the static vents.
Pitot Pressure
Input: Pitot tube near the top of the vertical fin
Static Pressure Input: Fuselage side in front of the wing root
...c
~ "E2so
...... ~
u
(}) 0
-+-'l.J")
d
u
·-
"O
co
1--C (Y)
........,
·-200
Q)
...Y
Ol
"O
c
·-
~150
..c.
l)
Vl
Q)
~
2100
CJ)
(})
~
Ol
c
<(
ll
~
~
/
./
v
/
v
v
I/
v
/ rv
/
v
/
v
.V
p
v
I/
/
!
-
/
v
/
/
50
100
150
200
~
/
,
/
/
250
Berichtigte Geschwindigkeit VcAS [km'h1
:1:> :o m 140
Calibrated Airspeed VCAS [ktsJ
8