How are defined the cylinders (around turnpoints)?

[Filgueiras]

Sometimes the cylinders in turnpoints are defined huge, sometimes tiny. Why so?

[Rotareneg]

If they are really huge, like tens of km across, it's probably an AAT task : https://www.condor-club.eu/generic/161/

[Bre901]

It's just a matter of the tasksetter's choice (or absence of) :
The default sector radius in Condor is 3km, whatever the angle
The FAI sporting code section 3 (gliding) states :

OBSERVATION ZONE 1.2.6 The airspace a glider must enter to attain a declared TURN POINT. It is either:
a. a CYLINDER having a 500m radius and unlimited height, centered on the TURN POINT, or
b. a SECTOR, a quadrant having unlimited radius and height, with its apex at the TURN
POINT and oriented symmetrical to and remote from the bisector of the inbound and outbound
LEGS.

https://www.fai.org/sites/default/files ... 2019v2.pdf

[Filgueiras]

Sometimes the student asks about what seems to him a gravel, and the teacher shows its actually a mountain. I think this is what they call *Education*
Thank you people for the lesson, I'll have to progress a lot yet