primary inst while on Glide slope?

[saviboy]

what is primary inst. when on the glideslope?
thanks

 

[mike1mc]

I was taught to use the VSI and DG. Nials those two and you'll always keep the needles pegged. This also keeps you from chaisng the LOC and GS. I'm sure everyone has their own opinion.

 

[pilotman2105]

I was taught to use the VSI and DG. Nials those two and you'll always keep the needles pegged. This also keeps you from chaisng the LOC and GS. I'm sure everyone has their own opinion.

Provided your airspeed doesn't change, you are correct.

 

[falcon20driver]

It's all about control and performance, forget that primary and secondary **CENSORED****CENSORED****CENSORED****CENSORED**.

Set an attitude with the attitude indicator, trim, crosscheck and adjust.

For the glide set your attitude and use the VSI to see what performance you're getting, if you're high reset your attitude for a greater descent rate.

I use the airspeed as my performance gauge for power on the ILS.

 

[mmmdonut]

Provided your airspeed doesn't change, you are correct.

Ground speed.

 

[pilotman2105]

Ground speed.

(And what the hell is with the "The message you have entered is too short. Please lengthen your message to at least 5 characters?" So much for conserving bandwidth with my wink instead of this long drawn out question.)

 

[FlyinTim]

I personally believe that all this Primary stuff is BS...do what feels right...keep your scan but do your own thing...

 

[Tinstaafl]

I disagree, FlyinTim.

I've spent more hours than I can recall watching students try to have some amount of stable & precise flight controlling the a/c in response to either LOC/GS indications or VSI (non-IVSI)/ASI/ALT. There IS a difference in effect if the pilot's inputs are held until a performance or navigation display responds vs. a pilot's input against the AI/AH then waits for noticeable change, assess the rate of response in relation to the nav/performance instruments & reiterates.

So, when someone asks about primary instruments my first question is 'In relation to what? Control of the aircraft or measurement of performance WRT to a desired flight path?'

If control is the point then the AI/AH + power indicator(s) are primary. If measurement WRT to flight path then one could argue that the primary instrument is the performance instrument that most readily defines the desired plane(s) of the flight path however this only measures performance not control.

 

[minitour]

If you're looking to maintain the centerline of the LOC and GS, wouldn't your primary instrument be the HSI or VOR/LOC/GS?

Using your nav instruments keeps your needles centered...everything else is supporting?

IE.
LOC/GS = Primary for Bank and Pitch
ASI = Primary for Power

DG/AI = Supporting for Bank
ALT/VSI/AI = Supporting for Pitch
Tach/MAP Gage = Supporting for Power

Perhaps I'm making this too simple...to me what makes sense is on an ILS you maintain the GS and LOC in the center. To do that, you "fly the needles" all the way to DH.

Just an opinion....probably wrong...

Eyeore has left the building...

-mini

 

[satpak77]

not be be a wise-a$$, but my primary instrument on the ILS IS the localizor and GS needles

follow those and everything else works out, hell you even are at VREF at 50 feet and land at the 1000 foot markings

can't ask for much more than that

(above is based on airplane being properyly configured per POH/etc during approach)