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

ASW27B polar



 
 
Thread Tools Display Modes
  #1  
Old February 29th 04, 04:42 PM
Chip Fitzpatrick
external usenet poster
 
Posts: n/a
Default ASW27B polar

Hi,

Does anyone have an ASW27B polar from flight test data or a set of
polar equation values they find useful?

Chip F
  #2  
Old March 1st 04, 12:50 AM
Andy Blackburn
external usenet poster
 
Posts: n/a
Default

Based on these three polar points take off the factory
polar:
V(knots) Sink (knots)
58.75 -1.24
84.45 -2.29
114.00 -4.86

I generated the following polar coeffieients:
a: -0.000832266
b: 0.078337385
c: -2.973814609

For use in the quadratic polar approximation:

Sink = aV^2+bV+c

All units are knots. This is based on a takeoff weight
of 760 lbs (wing loading of 7.84 lbs/sf). To adjust
for different wing loadings, divide the 'a' coefficient
by the square root of the wing loading ratio and multiply
the 'c' coefficient by the square root of the wing
loading ratio.

These are the same polar points used by WinPilot. I've
found it to be pretty accurate on long final glides.

9B

At 15:48 29 February 2004, Chip Fitzpatrick wrote:
Hi,

Does anyone have an ASW27B polar from flight test data
or a set of
polar equation values they find useful?

Chip F




  #3  
Old March 1st 04, 01:48 PM
Chip Fitzpatrick
external usenet poster
 
Posts: n/a
Default

Thanks a lot!

Chip
 




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
Commercial polar routes? General Aviation 6 January 28th 05 09:03 PM
18m polar curve Alan Irving Soaring 1 December 16th 03 12:45 AM
Blanik L-13 polar BTIZ Soaring 4 August 14th 03 06:51 AM
Is anyone still interested in CuSoft "Polar Explorer" program for PC? Branko Stojkovic Soaring 1 July 26th 03 01:06 AM
LX 1000 polar calibration Vignaud Frédéric Soaring 0 July 14th 03 05:14 PM


All times are GMT +1. The time now is 10:15 PM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 AviationBanter.
The comments are property of their posters.