On Monday, March 2, 2020 at 1:19:05 PM UTC+13, Richard Pfiffner wrote:
On Sunday, March 1, 2020 at 2:07:55 PM UTC-8, wrote:
On Monday, March 2, 2020 at 10:14:00 AM UTC+13, Richard Pfiffner wrote:
On Saturday, February 29, 2020 at 8:32:18 PM UTC-8, Tim Taylor wrote:
Shaun,

The reason for the restrictions is having an artificial horizon would provide the potential for pilots to fly into clouds. This is both unsafe and unfair in contests.

Every state of the art Vario, Flight computer & Cell phone has this option. Will he CD be checking all contestants instruments and phone? It may be time to get rid of this rule.

Richard,

LX9000's and Air Avionics devices both log the deactivation of AH in the IGC file. Cell phone AHRS's are not practical for flight, try it for yourself - it doesn't really work, they rapidly get confused.

So which IGC files must you use in the contest. I have a S80, Air-Avionice and a NANO. Two can have AHRS. I chose to submit the NANO. How will you control this and make sure contestants do not use the AHRS. Again time to change the rules.

Richard

The onus is on you (the contestant) to prove that you did not use it, a process is typically specified in the local rules, i.e. from the most recent JWGC, where penalties were applied to a pilot due to cloud flying(!):
AHRS compatible IGC FRs are allowed if the AHRS is turned off for the competition period,
and this is logged to the IGC file. e AHRS compatible device must be the primary FR. In case
the FR does not support disabling AHRS than it must be removed. e Organizers shall be
informed of any change of equipment including the designation of the primary Flight Recorder
(in case it is an AHRS compatible IGC FR). All AHRS compatible FR’s files must be handed
over on all competition and training days.