[balloon-makers] iffy lift calculations?
Paul Vincent Craven
paul at cravenfamily.com
Sun Apr 1 19:37:40 CDT 2001
Finally got a chance to look at it. Not to bad!
> -----Original Message-----
> From: balloon-makers-owner at mail.deering.org
> [mailto:balloon-makers-owner at mail.deering.org]On Behalf Of Tom Deering
> Sent: Friday, March 30, 2001 11:38 AM
> To: balloon-makers at deering.org
> Subject: Re: [balloon-makers] iffy lift calculations?
> >Your total system weight of 150 pounds indicates that you are looking at
> >FAR Part 103.
> Yes, I am shooting for ultralight, but it was accidental that I hit
> exactly 150 lbs. That's just the weight the spreadsheet spit out for
> that size envelope. It calculates everything except the fuel, based
> on the envelope size. I sized the envelope to maximize the 45"
> fabric, not to FAR 104. I just put a new version up at
> (Interesting FAR 103 stuff snipped)
> >To answer your other question, how much lift beyond equilibrium do you
> >need, ten percent will give you your maximum rate of climb or close to
> >it. A little extra volume goes a long way for the extra weight of
> So ten percent of 350 is 35 lbs. I have almost twice that. I should
> be okay, then?
> Hoo boy. We're getting close.
> tmd at deering.org http://www.deering.org
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