amdx wrote:

On 6/16/2014 10:17 AM, gareth wrote:
What is the availabilty of helium-filled balloons to
haul up a 1/4 wave vertical?



Seem pretty available, I used Google, it is a search engine,
I put in "large helium Balloons" and got 453,000 hits.
Here are a few.

http://www.balloonsfast.com/36inchlatexballoons.html
http://www.balloondealer.com/app/
http://balloons.net/Helium_Balloons/index.php
http://www.partiespluswholesale.com/..._Balloons.html
Mikek


On there other hand, floating a tethered balloon 1/3 mile into the air may
be a problem for airplanes.