SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK
Arcus M
FLIGHT MANUAL
Note:
From many years of experience, the polyester finish on this aircraft is known to
become very brittle at low temperature.
Particularly when flying in wave at altitudes in excess of about 6000 m (approx.
20000 ft), where temperatures below - 30°C (- 22°F) may occur, the gel-coat,
depending on its thickness and the stressing of the aircraft’s components, is prone
to cracking!
Initially, cracks will only appear in the polyester coating, however, with time and
changing environment, cracks can eventually reach the Epoxy/glass cloth matrix.
Cracking is obviously enhanced by quick descents from high altitudes with
associated very low temperatures.
WARNING:
For the preservation of a proper surface finish free from cracking, the
manufacturer strongly advises against high altitude flights with temperatures
below - 20°C (- 4°F)!
Also, a steep descent with the airbrakes extended should only be conducted in
case of emergency (instead of the airbrakes the undercarriage may also be
extended to increase the rate of sink).
October 2011
Revision --
appr. 4.5.7.2