"Ian Johnston" wrote in message
news:dzZo7CxomoOm-pn2-39ddFD9pBSKp@localhost...
On Wed, 22 Jun 2005 12:54:44 UTC, wrote:

I wonder at the thread though. Everyone discussing recognition of a
fully developed spin versus spiral dive.

Isn't it generally more useful to recognize the difference between a
just-developing spin and a just-developing spiral dive?

Which reminds me of Johnston's Test Question for BGA Instructors
Number Three:

"The offical recovery from a stall with wing drop is different from
the official recovery from a spin. At what point do you, personally,
transition from one to the other?"

Ian


As often happens, the BGA comes through with some useful wisdom. Thanks,
Ian.

As for the difference in sensations between an incipient spin and incipient
spiral, the former seems to me to be like an uncommanded yaw and the later
like an uncommanded roll. To me, at least, they clearly say that if the
situation is allowed to continue without intervention, the uncommanded yaw
will become a spin and the uncommanded roll will become a spiral.

I wish I could capture the sensations and record them. They would be very
useful in training.

As for a spinable trainer with similar characteristics, the venerable IS28b2
would do a creditable job of either spin or spiral and build up speed like
crazy in the ensuing dive. It had the requisite large inertia about all
axes. I found it taught me a lot about how to fly a Nimbus.

Bill Daniels