Gary
A quick reply re the acceptance of the two take-off strips is:
The strips are a success. However, really as I see it, it is best to
suspend judgement for a year or two. Time will tell. For example, how
will they stand up in the summer heat to ning-nongs turning a glider on
the spot prior to climbing on board for a launch? Main wheels can screw
the bitumen up in this manouvre!
The earth works which created the strips also left significant areas at
the sides disturbed due to drainage shaping of the ground, and this
combined with the stones broomed (vacuum sweeping was reserved for other
areas of established seal subject to resealing - not to be used on new
seal) off the strips after the sealing process means that we have a fair
bit of small loose stone besides the strips and little grass. Bit by
bit some of this stone gets back on the strips such that we will have to
broom sweep again from time to time using our geriatric kit from
Departmental days. For example, you need the tuggies to observe not
crossing the strip when taxiing, if they can avoid it, so that the tug
doesn't blow stones back onto the strip.
We also have here a K13 and Zephyrus with nose skids. They have to
launch beside the take-off strip and move onto it late in the ground
roll after elevator authority is gained. At this point this seems to
work OK. If we did not do that we would, in my view, see significant
damage. The first time you establish a bitumen seal it looks solid but
really there is not all that much there!
Regards
Roger Druce
On 26/04/2010 8:22 PM, Gary Stevenson wrote:
John,
Now that is REALLY weird ; a video comparison between winch launching
and aerotow! ???? I find it hard to believe that you missed the
obligatory childhood lecture (often repeated through the years), on
comparisons: Apples with apples; oranges with oranges. The aerotow box
was a total waste of time, and a major distraction.
Nice video of the winch launch though, and good footage of the changed
topography of the BM airfield.
Did you do any soaring off this or any other launch on the day?
What is the consensus of the users on the success (or otherwise) of
the recently installed launch strips?
Cheers,
Gary
-- Original Message -----
*From:* John Parncutt <mailto:jparn...@bigpond.net.au>
*To:* 'Discussion of issues relating to Soaring in Australia.'
<mailto:aus-soaring@lists.internode.on.net>
*Sent:* Monday, April 26, 2010 6:46 PM
*Subject:* [Aus-soaring] Winch vers. Aerotow
Hi All,
Thought you might be interested to see this comparison between
winch launching and Aerotow.
Greig Wanless and Roger Druce on Aerotow with Axel Allgaier and
myself on Geelong G/C winch.
A great day for winching on Saturday with about 15 -20 knots of
wind straight down 27 we were consistently getting 2000ft AGL.
http://www.youtube.com/watch?v=Ky1leolUCAY
Cheers,
John
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