[balloon-makers] Welcome back Greg and Phil

Greg_Winker at Dell.com Greg_Winker at Dell.com
Mon Oct 15 11:51:19 CDT 2001

Curtis - 

I had my SLR camera on board and it looks like I took 100+ photo's.  I
brought my 18' boom along and took pictures of us in the basket at 12,000'
over west Texas.  Those should be interesting.  

Flying at night is so cool.  One of the neatest sensations in all ballooning
is when you lay down on the bed at night, look up at the gas bag silently
floating over your head and see the Milky Way galaxy as a back drop.
Unfortunately, there is no way to capture that image on film.  You'll have
to see it for yourself.  

More night flying stories to follow.

Good Floating!

Greg Winker

-----Original Message-----
From: Curtis Pack [mailto:cpackdo at citynet.net]
Sent: Monday, October 15, 2001 2:56 PM
To: balloon-makers at mail.deering.org
Subject: [balloon-makers] Welcome back Greg and Phil

Greg and Phil,
Great flights.What a wonderful adventure. Any pictures by for the rest of us
? Does Phil have a movie in the pipeline yet?. How was the night flying in
the U.S.A.?
Thanks for the simplification of the sigma value. I would be interested in
those reports.
Keep those gas bags floating !
Fly safe,
----- Original Message -----
From: <Greg_Winker at Dell.com>
To: <balloon-makers at deering.org>
Sent: Monday, October 15, 2001 9:11 AM
Subject: [balloon-makers] Smalley Sigma Shapes

> In response to Curtis' question about the sigma factors, I consulted the
> expert and include the following information.  I know someone at the
> Flight Facility and will see if I can get a copy of these reports.  Let me
> know if you would like a copy "for research purposes only."
> What a week Phillip and I have been through.  Too many highlights to list
> right now, but look for some details in the next day or two.  Thanks to
> everyone who helped, especially those I haven't had the chance to thank.
> Good Floating!
> Greg Winker
> ---Original Message-----
> From: Jim Winker
> Regarding the Smalley sigma shapes:
> The simple answer is that the shape gets much shorter and fatter as the
> sigma value goes up. Sigma 0.0 is for a situation where the ratio of
> balloon weight to payload weight is very low, that is, the balloon is
> considered weightless. At the other extreme, the payload weight is small
> compared with balloon weight  --  as would happen if trying to reach a
> very high altitude on a big balloon with a small load. A typical hot air
> balloon would normally want to take the shape at about sigma=0.0.
> The full answer cannot possibly be put into an e-mail. Smalley covered
> the subject thoroughly in a series of a half dozen reports in about 1963
> to 1965. These can be seen at the NASA Wallops Flight Facility, VA
> Balloon Technology Archive. That is NOT a lending library.
> Jim Winker
> > From: Curtis Pack [mailto:cpackdo at citynet.net]
> > Subject: [balloon-makers] Smalley and Sigma Relationship
> >
> > List,
> > Can anyone explain the relationship the sigma value has for the Smalley
> > factors and the resulting change in the envelope ?
> > Thanks.
> > Fly safe,
> > Curtis
> -------
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