Two variables in one display?

[Guest jcardana]

Hello again Mr. Dowson,

I'm back to show my love...

I currently use a GF-46 to display my Gyro heading in the left three spaces. Is it possible to also display ground speed in the right two spaces?

Doesn't hurt to ask right?

Joe

[Pete Dowson]

I currently use a GF-46 to display my Gyro heading in the left three spaces. Is it possible to also display ground speed in the right two spaces?

I don't know -- does the documentation show how to form entries for display? I really don't remember anything about GFdisplay (having not used GF displays now for many years. Let me have a quick look and get back to you.

[LATER]

No, I can't see a way. It is one display, so you'd need one value. You'd need to be able to compute

(heading * 100) + ground speed

assuming the ground speed was less than 100 knots. (what are you flying, by the way, if its max groundspeed fits in 2 digits? A balloon?).

There are no computational facilities in GFdisplay. You could write a small Lua plug-in which does the needed computations, writing the values to a user offset (in the range 66C0-66FF), and get that displayed via GFdisplay parameters in the normal way.

Regards

Pete

[Guest jcardana]

I tried...

D303 X2B00 F64 *1000  X6030 F64 *3600 /1852

...thinking it would add the numbers together, but it just showed the speed.

No matter, I'm using this on a GF-46 so I've used the left display to show the speed, instead of displaying "Gyro". I'm using the right display for the heading.I figured, if I need my displays to tell me what the numbers mean... I shouldn't be flying right?

Well, for now, I'm working with a Cessna and I wanted the Ground Speed while taxiing, when airborne, it switches to IAS.

For anyone else who may be interested...

This code will display the Gyro Heading on the right-hand display of the GF-46 and the Speed on the left.

[GF46.x]
1=X0366 U8 ; AIRCRAFT IS ON GROUND
2=X036D S8 ; AIRCRAFT IS IN OVERSPEED

D0.1=!C1 !C2 D201 X02BC U16 /128 ;          IF A/C NOT ON GROUND AND NOT IN OVERSPEED, DISPLAY IAS
D0.2=!C1 C2 D201 X02BC U16 /128 FFAST ;     IF A/C NOT ON GROUND AND IN OVERSPEED, DISPLAY FLASHING IAS
D0.3=C1 D4 X6030 F64 *3600 /1852 ;          IF A/C IS ON GROUND, DISPLAY GROUND SPEED
D1.1=D302 X2B00 F64 ;                       GYRO DISPLAY ON RIGHT

[Pete Dowson]

Well, for now, I'm working with a Cessna and I wanted the Ground Speed while taxiing, when airborne, it switches to IAS.

Ah, right -- but not two digits for IAS, I assume -- or IAS/10? ;-)

Regards

Pete

[Guest jcardana]

Ah, right -- but not two digits for IAS, I assume -- or IAS/10? ;-)

You're right, 3 digits for IAS