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JS-MD 3
Aircraft Flight Manual
MD10-AFM-00-001
Issue: 01
Rev. 00
Rev. Date: 14-Feb-20
Table 5.3-1 gives the coefficients of the second-degree polynomial
approximation of the JS-3’ polar curve in the 15 m and 18 m
configurations for a specific reference mass.
Configuration
15m
18m
Reference mass
450 kg
992 lbs
500 kg
1102 lbs
Polar
coefficients
a
0.9847
0.9233
b
-1.8498
-1.6595
c
1.4745
1.2658
Table 5.3-1
NOTE: The calculated flight polar can be represented by a
second-degree polynomial function. Various flight
computers use these functions and accompanied
coefficients as approximations where glider
performance prediction is required, e.g. to calculate
speed to fly and final glide calculations.

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