A aviation & planes forum. AviationBanter

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » AviationBanter forum » rec.aviation newsgroups » Soaring
Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners

relative climb performance



 
 
Thread Tools Display Modes
  #1  
Old September 14th 05, 06:12 PM
external usenet poster
 
Posts: n/a
Default relative climb performance

Q. All the gliders below join the same thermal at
2000 feet. In which order will they reach 5000 feet.
Discuss.

LS7
Discus
ASW19
DG300
Libelle
ASW20
LS6

John



Ads
  #2  
Old September 14th 05, 06:36 PM
Lars Peder Hansen
external usenet poster
 
Posts: n/a
Default

Depends a lot on the nature of the thermal. Weak, crummy, narrow and
turbolent ones favor some gliders while strong, wide & steady ones favor
other types. -And then, of course, it depends on the wing loading, some
types are good climbers at other wing loading ranges than others.

- Actually, the above is just useless theory. In the real World, the Libelle
always climbs better than anything you can throw at it ;-)

/Lars Peder


wrote in message
...
Q. All the gliders below join the same thermal at
2000 feet. In which order will they reach 5000 feet.
Discuss.

LS7
Discus
ASW19
DG300
Libelle
ASW20
LS6

John





  #4  
Old September 14th 05, 07:32 PM
Andy
external usenet poster
 
Posts: n/a
Default

To have any meaningful discussion you'll need to specify the wing
loading, the thermal strength, and the characteristics of the thermal
(big, smooth, small, turbulent etc.).

Without that input I'd assume that the glider with the lowest wing
loading and slowest stall speed will win. Is that the Libelle?

On the other hand I often outclimbed lighter loaded Libelles with my
ASW 19. In tight and/or broken thermals pilot technique can override
the differences in gliders.

Andy

  #5  
Old September 14th 05, 08:28 PM
external usenet poster
 
Posts: n/a
Default

OK, assume standard British 2 knot thermals. Gliders
have no water in. Thermals are small but smooth.

Reason for the question....I can get L info off the
net, but not climb data...

John


At 18:36 14 September 2005, Andy wrote:
To have any meaningful discussion you'll need to specify
the wing
loading, the thermal strength, and the characteristics
of the thermal
(big, smooth, small, turbulent etc.).

Without that input I'd assume that the glider with
the lowest wing
loading and slowest stall speed will win. Is that
the Libelle?

On the other hand I often outclimbed lighter loaded
Libelles with my
ASW 19. In tight and/or broken thermals pilot technique
can override
the differences in gliders.

Andy





  #6  
Old September 14th 05, 08:45 PM
Bob Kuykendall
external usenet poster
 
Posts: n/a
Default

Q. All the gliders below join the same thermal at
2000 feet. In which order will they reach 5000 feet.


The one being flown by the pilot who considers it "their thermal."

  #7  
Old September 14th 05, 09:01 PM
Andy
external usenet poster
 
Posts: n/a
Default

Minimum sink speed and minimum sink rate should provide some clues.
That data should be available. The stronger the thermal the more pilot
technique overrides small difference in glider sink. In large weak
thermals almost nothing will prevent the lower sink rate glider
climbing better and topping out higher. That effect is obvous, and
frustrating to the low pilot, at contest pre-start gaggles when the max
start height is greater than top of lift.

Andy

  #8  
Old September 17th 05, 07:04 PM
[email protected]
external usenet poster
 
Posts: n/a
Default

to have a REALLY meaningful discussion you should have added a pilot
name next to each ship.
BJS

  #9  
Old September 17th 05, 07:21 PM
[email protected]
external usenet poster
 
Posts: n/a
Default

Thanks Eric !
But I've switched brands...

 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Who does flight plans? Michael 182 Piloting 158 July 4th 05 02:50 AM
"I Want To FLY!"-(Youth) My store to raise funds for flying lessons Curtl33 General Aviation 7 January 9th 04 11:35 PM
Newbie seeking glider purchase advice Ted Wagner Soaring 19 January 2nd 04 07:00 PM
Angle of climb at Vx and glide angle when "overweight": five questions Koopas Ly Piloting 16 November 29th 03 10:01 PM
172 N Climb Performance Roger Long Piloting 6 September 10th 03 11:18 PM


All times are GMT +1. The time now is 09:19 PM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Copyright 2004-2018 AviationBanter.
The comments are property of their posters.