Flight manual DG-1000S
Issued: March 2002
LBA app.
5.4
5.2.2
Stall speeds
The given speeds are the minimum achievable speeds during level flight in km/h
and (kts.).
Airbrakes retracted 20m span
mass kg
470
500
550
600
650
700
750
mass lbs.
1036
1102
1213
1323
1433
1543
1653
W/S kg/m²
26,8
28,5
31,4
34,2
37,1
39,9
42,8
W/S lbs./ft.²
5.5
5.84
6.43
7.01
7.59
8.18
8.76
V km/h
62,9
64,9
68,0
71,1
74,0
76,8
79,5
V kts.
Airbrakes retracted 18m span
W/S kg/m²
28,1
29,9
32,9
35,9
38,9
41,9
44,9
W/S lbs./ft.²
5.76
6.12
6.43
7.35
7.96
8.57
9.18
V km/h
64,4
66,4
69,7
72,8
75,8
78,6
81,4
V kts.
Airbrakes extended 20m span
mass kg
470
500
550
600
650
700
750
V km/h
67,4
69,5
72,9
76,2
79,3
82,3
85,1
V kts.
Airbrakes extended 18m span
V km/h
69,0
71,2
74,7
78,0
81,2
84,2
87,2
V kts.
The loss of height for stall recovery is approximately 30 m (100 ft) if recovered
immediately.
Flight manual DG-1000S
Issued: March 2002
LBA app.
5.5
5.3
Additional Information
5.3.1
Demonstrated crosswind performance
The demonstrated crosswind velocity is 15 km/h (8 kts) according to the
airworthiness requirements.
5.3.2
Gliding performance
Performance data with
20 m
span (S = 17,53 m²)
wing loading
kg/m²
28
35
42
minimum sinkm/s
0,51 0,56 0,62
at
V [km/h]
79
88
98
best glide ratio
/
45,9 46,3 46,6
at
V [km/h]
93
104
120
Performance data with
18 m
span (S = 16,72 m²)
wing loading
kg/m²
30
36
45
minimum sinkm/s
0,60 0,65 0,72
at
V [km/h]
84
90
100
best glide ratio
/
41,5 41,7 42
at
V [km/h]
100
110
123
A variation in speed by ± 10 km/h (5 kts.) from the above will decrease the best
glide angle by 0.5 glide points and increase the min. sink rate by 1 cm/sec. (2
ft/min).
The polar curves can be seen on the next page.
For optimum performance, the aircraft should be flown with a C.G. towards the
rear of the allowable range. This especially improves thermalling performance.
However the aircraft will be more pitch sensitive.
The wing fuselage joint, wing parting and the tailplane fin joint should be taped
up and the aircraft thoroughly cleaned to obtain maximum performance.
The polars apply to a "clean" aircraft.
With dirty wings or flight in rain, the performance drops accordingly.