Yaw String in a Spin

No. Too low tech.

--
Bert Willing

ASW20 "TW"


"Jackal" a écrit dans le message de news:
...
Possibly looking through the string and just observing the direction
the world is moving and inputting rudder in the direction counter to
the direction of motion might have merit?

At 11:30 21 January 2005, Jackal wrote:
Possibly looking through the string and just observing
the direction
the world is moving and inputting rudder in the direction
counter to
the direction of motion might have merit?



Yes - I think there is no choice.

I started the thread because that is apparently not
always as easy to do in an unexpected spin as in a
practice or training spin - and was prompted by the
posting from a professional test pilot that even he
had once used the wrong rudder in a spin recovery in
a jet.

The suggestion about considering using the string was
based on Helmut Reichmann's comment in Cross Country
Soaring (P147 Revised Edition) that 'the string always
points to the inside in a spin'.

Two interesting things have come out of the feedback
within the thread and directly:

1) Confirmation that even experienced pilots and instructors
can get disorientated about rotational direction an
unexpected spin.

2) Reichmann's assertion has been undermined and consequently
the behaviour of the string can't be said to be reliable
enough to advocate as the primary reference for which
rudder to use in a fully developed spin.

John Galloway

"Stewart Kissel" wrote in
message ...
4)All sailplanes should have yaw strings.

So what is the logic for no yaw string?...I had the
occasion to fly in a private two seater once, that
did not have one. Some logic I did not understand
about using the T+B ball instead.

What's the logic?
You mean besides the fact that the string will just jump around randomly all
the time?

Unless, of course, you mount it on the INSIDE of the windscreen.
Then, if you had a weight on it, would work pretty good as a heads up yaw
indicator. But, of course, it would work opposite from a string mounted on
the outside of a glider...

And, on the third hand, it would work on the outside if you were flying a
big daddy twin (excluding the Cessna Skymaster, of course). But since most
of they guys that fly big daddy twins mostly started out in single engine
spam cans, their bad habits are pretty much ingrained.

Eh?

jimk