(John) wrote in message . com...
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?


This has been tried on and off for more than 50 years.
Popular markers were baloons, toilet paper, and most recently
published a bunch of years ago, newspaper.
Harry Senn found that newspaper was about what it took to be able to
see. Soaring had a very funny article on this experiment with classic
cartoon with it.
Reality- it doesn't work in the real world.
UH