Altair Glide Computer and Navigation System Manuel d'utilisateur télécharger pdf (Page 35)

 So that XCSoar knows the performance of your aircraft, you need to configure the

type of aircraft you are flying before each flight (6.3)

◦ Config/Config/Plane (13.28)

 You need to configure the minimum safety height you want to arrive at a landing

place so you can do a proper circuit (6.8)

◦ Config/Config/System/Glide Computer/Safety Factors/Arrival height=1000ft (13.10)

 No aircraft performs as well as when fresh from the factory, so you need to

configure a “fudge factor” to reflect the slightly reduced performance (6.3)

◦ Config/Config/System/Glide Computer/Safety Factors/Polar degradation=5% (13.10)

◦ Note: this should really be set on a “per glider” basis rather than globally, but I haven’t

managed to convince the developers to provide this feature; however, XCSoar is open

source, so I can add the feature myself if I really want it!

 Glider performance degrades during flight due to insects sticking to the wings, so

you can configure XCSoar to reduce the expected performance by 1% per hour of

flight time (undocumented)

◦ Config/Config/System/Glide Computer/Safety Factors/Au

to bugs=On

 You need to configure whether XCSoar should do glide range calculations using

the current MacCready setting or a “safety” setting (it’s safest to assume no more

lift) (4.11)

◦ Config/Config/System/Glide Computer/Route/Reach polar=Safety MC (13.13)

◦ Config/Config/System/Glide Computer/Safety Factors/Safety MC=0.0 kt (13.10)

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Altair Glide Computer and Navigation System Manuel d'utilisateur Page 35