This is not my idea but it sounds pretty good to me. "Doug" at Texas Soaring
Association (TSA) folds up TSA tow tickets so that they have two helicopter
blades and a body. As kids, we used to do this and throw them in the air and
watch them rotate and disappear in a thermal or rotate to the ground. When
"Doug" finds a thermal he throws a few of these folded helicopter tow
tickets out the vent window. They tend to go to the core of the thermal and
he follows them up. Don't anyone report "Doug" for excessive use of TSA tow
tickets or I will be in big trouble.

Hoping to center the thermal,
Bob Kibby "2BK"


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"John" wrote in message
om...
Here is a thought:

Was in the back yard making thousands of soap bubbles (Mr. Bubbles)
for the baby. Slight breeze. Clearly could tell the entire airflow
pattern in the back yard....even a little ridge lift over the glider
trailer!

Wonder if you could add a soap bubble machine to a sailplane? Turn it
on when you first hit a thermal and a trail of bubbles is created.
After one circle, just fly toward the highest bubbles and that is
where the thermal's core is.

I could see the bubbles about 200 feet away, but might could add a
color die to enhance visibility further.

Any thoughts on this?