302 has engine noise detection but OLC uses it only for motorgliders. For pure
gliders OLC determines the start by looking for a circle (glider radius, not
tow plane), or the end of the climb on tow.
302 does not show any noise change during tow since I can retract the gear.
The issue is probably because OLC requires several position fixes before
start of the takeoff which XCSoar occasionally failed to include. This was
fixed and hopefully will address this issue.
Ramy
>________________________________
> From: Ian <ian-xcs...@zsd.co.za>
>To: xcsoar-user@lists.sourceforge.net
>Sent: Tuesday, May 1, 2012 11:28 PM
>Subject: Re: [Xcsoar-user] OLC issues with XCSoar IGC file
>
>On 01/05/2012 20:38, David Anisman wrote:
>
>> I noticed #1 in both flights that I had so far with xcsoar. I just
>> assumed it was an OLC issue. But if it worked well with the 302 log,
>> then what does that mean?
>
>Does the 302 have Engine Noise detection? Maybe OLC makes use of this to
>help determine start of flying.
>
>With my LS3a (which has no engine) my Volkslogger log's engine noise
>trace clearly shows the end of the aerotow. I think it is picking up
>noise from flying with the u/c down (LS3a tow hook is in the wheel well,
>you can't raise the gear until after release), or from the tug.
>
>Maybe the OLC guys have noticed this and use engine noise as part of
>their "guess start of soaring flight" algorithm. Obviously XCsoar logs
>don't have any engine noise data.
>
>Has something changed with effect to "no engine noise available" in the
>XCsoar log files with recent versions?
>
>Regards
>
>Ian
>
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