In article XoH1k.16394$qP.15098@trnddc03,
TheSmokingGnu wrote:

More_Flaps wrote:
How can I tell if my loops are perfect
circles?

Ask Dudley for technique, but as for the physics: a perfect loop would
have a constant acceleration.

Only in zero G.

Just take an accelerometer with you and
see how consistent you are (preferably one that can discount the Earth's
gravity,

Are there such beasts? I know it's theoretically possible, but it would
be very hard (and expensive) to build such a gadget. Do they really
exist?

rg