While comparing speeds of late 70s comps, bear in mind that at this point in
time competition glider sealing techniques were not what they are today.
Watch an older racing film (Zulu
Romeo, Sun Ship Game) and listen to the howling noise when a glider
finished.
A friend rebuilt an ASW12, profiled the wings, sealed everything, got the
aftermarket flap mod to work, improved cockpit comfort, and he in that glider
was hard for anyone to keep up with. The 12 actually exceeded factory specs by
4 or 5 points of L/D.And Gerhard calls it "a mistake of my youth".
Jim
________________________________
From: Tim Shirley <[email protected]>
To: Discussion of issues relating to Soaring in Australia.
<[email protected]>
Sent: Thursday, August 18, 2011 10:24 PM
Subject: Re: [Aus-soaring] Handicaps
Well, I can't help much but here goes. I don't have any results from Narromine
1978, and I have points results but no speeds from Waikerie 81.
Average winners speeds were:
Year Place Open 15M
Std
77 Renmark 112.9 (.94) 106.6 (.97)
103.5
79 Cunderdin 97.1 (.99) 96.6 (.91)
87.8
80 Benalla 114.4 (.97) 110.8
(.93) 102.5
Overall 108.1 (.97) 104.7 (.94)
97.9
The figures in brackets are the percentage speed differences between
the classes (Open-15m and 15m-Std).
I only used winners speeds (I'm not that much of a masochist and
anyway winners speed is all that is often available) but I have
researched before and found a good deal of consistency in the spread
of speeds, so it is probably still a fair comparison.
In all those contests Open and 15 metre flew the same task - though
of course the start gate opening would have been different. Nimbus
2's won every contest in Open Class, 15M were shared (Pik 20,
Mini-Nimbus and ASW20) and in Standard Class Hornet, Cirrus and
Jantar shared the honours.
Differences seem larger when speeds are higher, in favour of Open
Class - which would question the "lead-sled" theory - and the
difference between Open and 15 Metre is generally less than between
15 metre and standard.
I found only a couple of individual days when a 15 metre winning
speed was higher than an Open class winning speed, and when that
happened it was by a whisker. You were definitely better off with
long wings, and probably still are.
Untitled Document
Cheers
Tim
tra dire e fare c'è mezzo il mare
On 19/08/2011 10:40, Mike Borgelt wrote:
At 01:06 AM 19/08/2011, you wrote:
>
>In the late 70s were 15M speeds faster than open class speeds? I think Malcom
>Jinks and Tony Tabart would disagree!
>>Tom
>>
>
>Would someone please dig up the results from say the Renmark
Nationals(Cirrus and Hornet in Standard class vs Nimbus etc in
Open), the following year at Narromine and Benalla 79-80 and
Waikerie 80 - 81(15m classes and at Narromine in 77-78 the 15m and
Open flew the same tasks - 15M was in Open class too), Narromine
81 - 82(LS4 came on the scene) and see how these terrible old
gliders went when flown by good pilots, please? Just use the
speeds of the people from first down to 90% of the winning score.
>
>Then we can all bleat from a position of knowledge. Probably less
fun, though.
>
>Mike
>
>
>
>
>Borgelt Instruments - manufacturers of quality soaring instruments
since 1978
>phone Int'l + 61 746 355784
>fax Int'l + 61 746 358796
>cellphone Int'l + 61 428 355784
>
>email: [email protected]
>website: www.borgeltinstruments.com
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