On 27/11/10 16:09, Nelson Handcock wrote:
Excuse what might appear a dumb question, but apart from the cost of installing & maintaining the instruments, what is the issue for gliding here?

I take it an extra battery would be required - so I guess this has to be factored into task planning - how many do we need to ensure the instrument has power for the duration....?

Say I wanted to do a XC task and I expected to be flying for 3-4 hours - will I need 1 or more 12 volt battery? Does weight become an issue?


If you only want to stay airborne for 3 or 4 hours, adding another 7AH battery may be enough (I still haven't found power requirements for ADS-B and Mode C transponder though).

However, I have Alice set up for LONG flights - my longest so far is 8:40 and I expect 1000k to be around 10 hours. I regularly (in a normal soaring season) fly for over 6 hours. I already have 3 9AH batteries in Alice (2 main, one reserve) and am looking to add a solar collector next year. I rather suspect that even that will not be enough. I'm not even sure if I could find space for another battery, let alone two!
-- 
Robert Hart                                  [email protected]
+61 (0)438 385 533                           http://www.hart.wattle.id.au


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