New to me question

[rturbett]

I'm not sure I have seen these before- what is the yellow metal slice and the green and red indicators- I believe they move as one unit on a ring.

This seems different than an altitude setting bug - to remind you what atc cleared you to, as I have used in the past.

 

Thanks,

Rob

 

 

 

 

[Hank]

I've seen them before . . . .

A little googling returned nothing, but I did find them at Sporty's.

https://www.sportys.com/altitude-alert-indicator-2-7-8-in-dia.html

Here is how it works [from the comments above]:

Some helpful hints and instructions on how to use it

Remember the Green/Yellow and Red bugs/tabs are used for 100's of feet not 1000 feet
On take Off:
1) Place the red flag at the airport altitude. On VFR departures make your turn out 300 feet below the red flag (if standard pattern altitude is 1000 AGL). On IFR departures make your turn out 100 feet below the green flag (400 AGL) unless it is a non standard departure procedure.
2). If you have not flown past the red flag (1000 AGL) on takeoff, land straight ahead if engine fails, do not turn back towards the airport.

En route:
1) Use the green flag/tab as an altitude "bug" for ATC assigned altitudes or VFR plan cruise altitudes.

Approach:
1) Use the green flag/tab for approach chart altitudes as a reminder
2) Just before the FAF put the Red flag/tab on the MDA or DA altitude.
3) When you hit the Yellow tab start adding power for MDA level out or be prepared to "go miss" on the DA.
4) When you hit the Red flag "level out" at MDA or go miss on the DA
5) If going missed at the red flag and gaining altitude, once you hit the yellow flag, it is a good reminder to put the gear "up" (positive altitude)

For VFR pattern work:
Put the Red flag at the airport elevation.
that will end up being the standard pattern altitude of 1000 AGL
when you pass the green flag, you will be 500 feet above the ground. This is a good time to check the gear is down (green light = green flag) and make the call that you are on short finial. 

[slowflyin]

Green 500 to go

Yellow 200 to go 

Red Minimums.

[rturbett]

Very cool- thank you for the info

 

[Pinecone]

Good to know.  They are installed on my round altimeter.

But moot now, next time I fly my plane, there should be no round gauges.

 

[jetdriven]

You can send baro minimums on the screen and it will ding at you

[A64Pilot]

Never seen those.

The Sporty’s link says they are peel and stick, so how do they move?

[slowflyin]

4 minutes ago, A64Pilot said:

Never seen those.

The Sporty’s link says they are peel and stick, so how do they move?

It's a three layer mechanism.  A black ring stuck to the glass connected to a black ring out front with the indicator ring slipping between the two.  I had one in my 170 and found it useful.