DG Flugzeugbau GmbH
Flight manual DG-500M
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
Wing loading kg/m² (lbs/ft²) 35 (7.2) 40 (8.2) 45 (9.2)
min.sink rate m/s (ft/min) .57 (112) .61 (120) .64 (126)
at V km/h (kts) 80 (43) 86 (46) 90 (49)
best glide ratio / 45 46 47
at V km/h (kts) 100 (54) 107 (58) 113 (61)
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
thermaling 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.
Operating the wing flaps see 5.3.4.
Issued: April 1997 App. 5.6
5.3.3 Flight polar
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