On 18 Jan 2004 07:08:36 GMT, (Mark Navarre)
wrote:

Questions to ponder:
1)What was the K21 doing at the top of a loop at approx 800 feet agl, and where
was it a few seconds before that, and at what speed?
2)What is the official floor of the aerobatic box, NTSB states surface to 6600
msl, this must not be correct: How can the box be in the traffic pattern and
still extend to the surface?
3)see FAR 91.303(e) for aerobatic flight AGL limitations.

Mark,

One can apply for a waiver to many of the paragraphs of 91.303,
including allowing aerobatics down to the surface, over airports,
within airways, etc. Go to the faa website, search for 8700, the
General Aviation Operations Inspector's Handbook, look in volume 2
chapter 48. It tells all about it.

I have an aerobatic practice box waiver over an airport in Class D
with control tower, light airline traffic, medium bizjet traffic,
gliders, etc. I fly both powered and glider aerobatic aircraft in the
box. Especially for glider aerobatics, you want it right over a
runway. The tower does a good job keeping me separated from other
traffic. The box floor is 500 AGL.

Boxes like that at Turf is not all that uncommon. This is just one
more good reason to read the NOTAMS before you go fly.

Klein