I thought that you flew the C-130J, Chris. The Brit version of that had a
large HUD; a colleague of mine was one of the early RAF pilots, so I heard
plenty of stories about the new machine (whether or not I wanted to :-))
I flew ADF procedures only during training on the Hunter, which had no other
navigation aid. Fortunately, the instrument rating did not include anything to
do with the ADF as no other FJ aircraft was so equipped. Our instrument rating
test consisted of a precision approach and a non-precision approach, one of
which had to be limited panel (emergency compass and Turn and Slip, no horizon
or main compass).
The HSI is only an instrument; what you input to it is your choice, but it has
some very useful features. Even the little Tutor that I fly now has a useful
little HSI.
Chris
> On 9 Aug 2015, at 18:57, Chris Trask <christrask@xxxxxxxxxxxxx> wrote:
>
>>
>> I share your wariness, Chris. I’ve never been enamoured of totally glass
>> cockpits, and RAF pilots
>> are now trained on the Hawk T2, which has a HUD as well as a glass cockpit.
>>
>
> A HUD display was something I would have liked very much in the C-130.
> As it was, one pilot flew the instrument approach and the other pilot plus
> the flight engineer looked for the field environment.
>
>>
>> Mind you, vacuum-operated artificial horizons were fraught with risk, as I
>> understand it. If you
>> had a leak in the supply from the engine you could have an insidious failure
>> of the instrument, a
>> failure which could easily cause disorientation in cloud etc . . .
>>
>
> All sorts of things can go wrong with mechanical artificial horizons,
> whether vacuum- or electric-operated. That's why you must readily recognise
> any serious disparity between it and the other instruments. On the C-130E/H
> there is a 3" diameter standby horizon just in case the large one failed.
>
> I learned another thing about basic instrument flying, which is NOT to
> rely entirely on the fancy horizontal situation indicator (HSI). If you are
> in a "civilised" pat of the world where ILS and other sophisticated
> approaches are abundant, fine. But in many parts of the world lesser
> technology prevails, and you often find yourself with nothing but ADF
> approaches. On my first trip through the Mediterranean I found this to be
> the case, and after that experience I flew non-precision approaches using the
> RMI card as the primary instrument with the HSI as a backup. That was a
> proficiency that I did not want to compromise.
>
> The crash in Yugoslavia that killed Secretary Brown many ears ago was due
> partially to a lack of proficiency with ADF approaches, though in the final
> analysis the pilots executed a missed approach turning left instead of right
> and flew into a cloud of rocks.
--
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