Stefan,

Again, no argument with regard to the conclusions drawn in the accident
report you cite. BTW, that is one incredibly long and detailed accident
report! I think in the US, only a Kennedy could garner that much attention.

Anyway, with regard to the Trutrak versus western style horizons, the
depiction is the same, i.e. the aircraft silhouette remains stationary with
the host aircraft while the "outside" sky/earth turns within the instrument
to depict bank angle. Thus, someone who has trained on western instruments
should have no problem adapting to the Trutrak. Much easier and more
intuitive than a needle and ball - - at least for me as I trained w/ a turn
coordinator. All you gotta remember is there's no pitch info. In a glider,
that isn't too tough as if you go too fast, the wings get swept back.

bumper

"Stefan" wrote in message
...
bumper wrote:

While I respect your opinion, I'd like to know what data you're basing it
on.

It is generally considered a bad idea to have two instruments which look
the same but have a different meaning. It will work fine as long as there
is no stress present, but the moment there is additional stress, chances
are that the human system breaks down. For illustration, read the accident
report at http://www.bfu.admin.ch/common/pdf/1781_e, especially paragraph
1.18.2.