OLC, ENL, Start of soaring flight

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Andy - 30 Jul 2009 15:31 GMT

I'd like to hear from people who submit logs to OLC using a recorder
that has no ENL (Engine Noise Level) capability and produces a log
with no ENL data.

Does OLC automatically determine the start of soaring flight, or do
you always have to set it manually? If OLC does it automatically, how
often does it get tow release point correct (close enough that you
don't have to revise the time to get credit for full flight distance)?

Reason for the question is that I fly a pure glider and quite often my
tow release is many miles in error as my ENL is high due to open nose
vent. (CAI 302, ASW28)

thanks

Andy

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Ramy - 30 Jul 2009 20:39 GMT

> I'd like to hear from people who submit logs to OLC using a recorder
> that has no ENL (Engine Noise Level) capability and produces a log
[quoted text clipped - 12 lines]
>
> Andy

Andy,

To prevent the ENL error make sure the "pure glider" checkbox is
marked so it will ignore the noise. The checkbox is available when
submitting from SeeYou but I believe also in the OLC direct claim.
However the latest version of SeeYou has a bug which results in credit
from take off to landing, as if the soaring flight started right after
takeoff. Unfortunately they haven't fixed it yet so I suspect many olc
flights are scored wrongly, unless the start time was corrected
manually. A better option is to submit directly to OLC, which usually
doing good job on identifying the release based on either drop at
altitude or tight circle, which works well most of the time, unless
you release in wave or ridge lift.

Ramy

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Andy - 30 Jul 2009 23:50 GMT

> To prevent the ENL error make sure the "pure glider" checkbox is
> marked so it will ignore the noise.

It would be intuitive to assume that were true but I don't think it
is. I believe I have pure glider checked but I cannot verify that
without making a new claim.

I asked OLC to ignor ENL for pure gliders and was advised that the way
to ensure ENL was ignored was to disable it in my logger. I know of
no way to do that with a 302 and I don't want to anyway.

Andy

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mikemike - 31 Jul 2009 02:20 GMT

>I'd like to hear from people who submit logs to OLC using a recorder
>that has no ENL (Engine Noise Level) capability and produces a log
[quoted text clipped - 8 lines]
>tow release is many miles in error as my ENL is high due to open nose
>vent. (CAI 302, ASW28)

Andy,

I have the same problem (ASW-27 CAI-302). I used to think it was one of the
vents, but now I am not so sure because I open and close the nose vent and
side vents frequently, but only get the ENL at the beginning of the flight.
I remember submitting a flight to OLC one time and it “started soaring
flight” 250 KM down my first leg at 17,800 MSL!! The problem was ENL. I
simply deleted the flight and re-entered it using the manual adjustment for
the start time. Since then, I do the following for each OLC submission:

1. Load the IGC file in SEEYOU and zoom in on the map to the release point
and get the precise release time and altitude per the flight log.

2. Check the “pure glider” box in SEEYOU (Edit, drop-down box “flight
properties”). Then I hit control-L to have SEEYOU score the flight (I use
the classic distance).

3. Upload the IGC file to OLC via “direct claim”. Check OLC’s
determination of the start time on the second window and make sure it matches
the correct start time determined in step 1 above. If not, correct it in the
box provided by OLC on that window then hit submit.

4. After OLC scores the flight, I check to make sure the classic distance is
approximately the same (within 1 or 2 KM).

I have not seen a “pure glider” box in any of the OLC web pages. That would
make life much simpler. Also, most glider models are either “pure gliders”
or “motorgliders”. Since we enter the glider model during submission, it
seems like it would be easy to have the OLC software ignore ENL for those
models that are only pure gliders.

Michael

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Aviation Forum / General / Soaring / July 2009

OLC, ENL, Start of soaring flight