SkyDemon Forums

Baro Alert through Transition Level

http://forums.skydemon.aero/Topic20189.aspx

By Gerhard66 - 5/31/2022 8:46:57 AM

 
Adam Erchegyi - 5/30/2022 5:13:32 AM
 
efrenken - 5/30/2022 3:58:50 AM
 
PaulSS - 5/29/2022 9:58:02 PM
There is no reason (unless in the USA) to wait until transition altitude/level to set 1013/QNH. Once you're cleared to a flight level, set standard. When you're cleared to an altitude, set the QNH.



You’re right if you fly under control and get clearances. If you fly VFR and just decide to climb or descent above/below transition you may forget to adjust the altimeter. It happened once to me and I joined the traffic circuit with 1013 hPa set, which was far away from what it should have been that day. Some kind of alert would have come in handy in that situation.

...and if you don't fly under control, you have no reason to set STD at all. Just fly all the time on the 'best' QNH you can get.


Wrong. You have a reason by law.
By erchegyia - 6/1/2022 6:51:05 PM

 
Gerhard66 - 5/31/2022 8:46:57 AM
 
Adam Erchegyi - 5/30/2022 5:13:32 AM
 
efrenken - 5/30/2022 3:58:50 AM
 
PaulSS - 5/29/2022 9:58:02 PM
There is no reason (unless in the USA) to wait until transition altitude/level to set 1013/QNH. Once you're cleared to a flight level, set standard. When you're cleared to an altitude, set the QNH.



You’re right if you fly under control and get clearances. If you fly VFR and just decide to climb or descent above/below transition you may forget to adjust the altimeter. It happened once to me and I joined the traffic circuit with 1013 hPa set, which was far away from what it should have been that day. Some kind of alert would have come in handy in that situation.

...and if you don't fly under control, you have no reason to set STD at all. Just fly all the time on the 'best' QNH you can get.


Wrong. You have a reason by law.


I cannot find any reference in that thread to TA/TL but cruising levels only. Could you point me to the right direction?
Let's take a practical example: I fly from LSZH (TA 7000') to LSZS (TA 16000') VFR and planning to cruise 9500' (uncontrolled, class E&G). So good so far. Where/when I am supposed to change to STD baro and back in your interpretation? How is that helping me with proper terrain clearence over mountain passes?
By toddy - 9/16/2016 7:02:53 PM

Hi there,

I fly with SkyDemon paired to a BT headset, so can clearly hear alarms in the headset. What would be wonderful is if we could get a voice alert to say - 'Set Standard Pressure' passing the transition altitude, and then click it off on the screen. On the way down, it should say, 'Set local Barometric Pressure' and we'd tick it off or it would alert again. Sometimes it can be late in the climb or descent before I remember to set it - the G1000 unit does indeed have this feature with a flashing baro setting until you acknowledge it.

Also, it would be nice to move beyond beeps - everything beeps and they loose their meaning. Voice alerts are much more effective.

toddy