From: 	Kevin Caldwell
Sent: 	Thursday, May 15, 1997 1:57 PM
To: 	davis@halcyon.com
Subject: 	re:RE: Polar Corrections?

Davis,

Sure, go ahead and post them. You can even use my name, and then no one 
will believe them anyway! I retrospect, there are probably bigger errors 
involved than just the wing circulation, so the corrections are not 
really significant.

I would like to know how Ball calibrates the vario too. The GC is now FAI 
certified (finally!),  so there will be controls in place on the altimeter 
accuracy, but I'm not sure how that would translate to the vario. Getting 
accurate polars may be expecting more than the instrument was designed 
for.

Kevin

(see Fai announcement below...)

In message "RE: Polar Corrections" sent on May14, davis@halcyon.com 
writes:

>Hi Kevin,
>
>I would like to post your corrections to the mailing list. I would 
>attribute them to an anonymous source if you like and explain their 
>significance and all caveats.
>
>I would do this only if you give me permission.
>
>I would also like to send the info to Ball and ask what's up.
>
>Thanks.
>
>Davis Straub
>co-author with Brian Livingston of "Windows 95 Secrets, Gold," from IDG 
>Books.
>"The Jaws of Life for Windows 95 Users."
>Seattle, WA
>
>                                 
>Date: Thu, 15 May 1997 12:19:40 +0200
>From: info@fai.org ( FAI)
>To: civl-info-l@fai.org
>Subject: New Electronic Barograph approved - Ball Graphics Comp
>X-Sun-Charset: US-ASCII
>Reply-to: civl-info-l@fai.org
>Errors-to: civl-info-l-request@fai.org
>Comment: Message from the FAI Hang Gliding & Paragliding Information
mailing list. 
>Comment: To reply or send a message to the list, mail to civl-info-
l@fai.org 
>Comment: To subscribe or unsubscribe, mail to civl-info-l-
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>
>
>Certificate of Conformance No. 16-1
>
>Ball Graphics Comp
>Software version 2.7
>Manufactured by :	Ball Variometers, Inc.
>			6595 O'Dell Place, Suite C
>			Boulder, Colorado 80301
>			USA
>
>Method of case sealing:	2 tamper proof seals over screw holes
>Restrictions :		0 - 6096 metres
>			-20 C to +50 C
>
>
>FAI-CIVL hereby declares that the barograph designated above conforms 
with
>the requirements put forward by the FAI-CIVL in "Standard for Electronic 
>Altimeters with Memory (version 8 dated 14/08/92)".
>
>Hence, flight record printouts made by the instrument will be accepted 
as
>barographic evidence of flight performances in support of FAI record and 
badge
>claims in class O airsports (hang gliders and paragliders) provided that 
the
>instrument was used in accordance with the relevant sections of the FAI 
>Sporting Code and that the official observer procedure was followed.
>
>In case a major design fault or weakness is detected after the approval 
of the
>instrument, this approval may be temporarily suspended. It will be 
restored 
>after corrective action has been taken to restore conformity with FAI-
CIVL 
>requirements. In this case, notice will be given to the manufacturer and 
the 
>public using relevant information channels.
>
>Acceptance of printouts does not constitute an endorsement of the 
instrument or
>guarantee of quality of materials, workmanship, reliability, accuracy, 
freedom
>from defect or malfunction. FAI and its officials refuse any and all 
liability
>for loss, lost profits, damage or injury resulting from the use, 
inability to
>use or possession of the above instrument. It is the user's 
responsibility to
>determine if the instrument is suitable for his/her purposes. The 
instrument
>should not be used for determining flight levels in controlled airspace 
unless
>it has been certified for such use by civil aviation authorities.
>
>===================================================================
>Subcommittee for Flight Verification
>Per Arne Soldal, Chairman