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[aprssig] TransAtlantic Balloon on 28 MHz (signal)

Rudy Benner rudy at ve3bdr.com
Thu Feb 23 22:36:39 UTC 2012


I did not see the decimal point. Now it makes sense.

-----Original Message----- 
From: Bob Bruninga
Sent: Thursday, February 23, 2012 5:34 PM
To: 'TAPR APRS Mailing List'
Subject: Re: [aprssig] TransAtlantic Balloon on 28 MHz (signal)

>> ...Air-to-Helium  (10-to-1) and
>> air-to-H2 (10-to.5) so the difference in lifting capacity is
>> only 0.5 out of 10 or about 5%.  Now it makes sense.

> This hurts my brain.  It sure looks like 10:1 vs 20:1...
> Time to revisit buoyancy class.

Yep, that's why I posted it.  All my life I never understood it till now...
It’s the displaced air side of the equation that matters. Nine units vs 9.5
units is only about 5% Better.

Bob, Wb4APR


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