When a valid START is made you will be guided to the next turnpoint. On the last leg a square
appears around the glider symbol.
If running into a turnpoint and a thermal is encountered you can mark it, turn the point, press
ENTER and you will get guidance back to it. Turning downwind at that point will probably get you
to the thermal. This is made easy by the GRAPHIC page wind arrow.
A circle appears around the glider symbol when navigating to a marked point. If at any time you
want to revert to task just press X. The circle disappears.
Landing fields that you notice can be marked and saved for addition to your database after landing.
The NEAREST page gives you situational awareness of possible safe landing points. They are
tagged if they are reachable from your present altitude.
Unless the wind between you and the finish line is going to change, final glide calculation is
completely automatic - just go home when the glider symbol gets above the solid bar.
Final glides around any number of turnpoints are also simple. The final glide to arrive at the next
turnpoint allows you to optimise arrival altitude at upwind turnpoints resulting in large time
savings. It is far better to take a weak thermal drifting along track after going around a turn than to
climb while drifting backwards before a turnpoint. Use caution here though, as you must turn high
enough to actually find a thermal on the next leg.
The arrival altitude at turnpoints is about the only B2000 setting you will need to change in the air
much of the time. Variables like Macready setting, bugs degradation and ballast are instantly set
with a simple twist of the appropriate knob on the B50.
You can gauge your in flight progress by looking at the STATISTICS page occasionally but
otherwise direct your attention to the wonderful view outside the cockpit.
Mike Borgelt
Toowoomba
Queensland
Australia
Appendix 1
A PRANDTL probe usually provides good airspeed information to air data computers like the B50
without further correction. If you are unable to use one of these and your sailplane pitot/static
system has large errors (greater than 2 - 3 knots) use the following procedure: Most Sailplane flight
manuals have a Position Error curve, table or graph. Draw a best straight line through zero and the
points in the useful speed range(best L/D to about 110 knots usually) and derive the ratio Calibrated
Air Speed / Indicated Airspeed. This may be in the range 0.95 to 1.05 and this value can be used in
TAS Scale in the B2000User program.
You must of course then use the same Pitot and Static locations for the B50 as this Flight Manual
information applies to.
If you aren't using the Flight Manual pitot/static or the position error is unknown the following
flight test method will give good results:
Flight Testing the Pitot/Static system.
In flight, after thermalling when the wind speed and direction have been established, fly upwind at
a constant airspeed and note the TAS and GS readings on the STATISTICS page. Repeat by flying
(66 paginas)
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