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QNH

Posted: Mon Jul 25, 2011 4:08 pm
by MPL Pilot
With this front moving in from the south, the QNH dropped from 1013 in the morning down to 1006 at 16h00 (**)
QNH is normaly between 1018 and 1030 here in Hartbeespoortdam area for those who don't know.

When I saw this it reminded me of the training days at Aero 57, the instructor would not fly 2 up when the QNH was under 1020.

Whoever is brave enough to fly, don't be caught out by the low pressure system. :oops:

Fly safe

Pierre

Re: QNH

Posted: Mon Jul 25, 2011 4:33 pm
by nicow
MPL Pilot wrote:With this front moving in from the south, the QNH dropped from 1013 in the morning down to 1006 at 16h00 (**)
QNH is normaly between 1018 and 1030 here in Hartbeespoortdam area for those who don't know.

When I saw this it reminded me of the training days at Aero 57, the instructor would not fly 2 up when the QNH was under 1020.

Whoever is brave enough to fly, don't be caught out by the low pressure system. :oops:

Fly safe

Pierre
It's saver not to fly trikes in bad weather.Stay safe!

Re: QNH

Posted: Mon Jul 25, 2011 5:00 pm
by Tumbleweed
High to low, don't go.

Re: QNH

Posted: Tue Jul 26, 2011 3:56 am
by FLYNOTE
If your altimeter is set to the local QNH and you are flying on ALTITUDE as oposed to a flight level and in VFR conditions you are fine. The " high to low, CAREFUL you go" rule comes into play if you are for example flying from JHB to Cape Town on a given FIGHT LEVEL with your altimeter set to the ISA ( international standard atmosphere) setting of 1013.25 and you are flying in IMC conditions and therefor IFR, then you must be aware that your terrain clearance will be affected by the pressure change from high to low. Flying our aeries VFR at all times in a local area is ok. Yes and we prefer nice weather as well for recreational flying vhpy

Re: QNH

Posted: Tue Jul 26, 2011 9:00 pm
by Jean Crous
I dont fly Gyros but as for the weather.....i watch the birds. When THEY think it a good idea to rather WALK to "work" ......then i stay on the ground :lol:

Re: QNH

Posted: Wed Jul 27, 2011 8:08 am
by MPL Pilot
FLYNOTE wrote:Yes and we prefer nice weather as well for recreational flying
Johan, that is true for most of us. Len Klopper is the exception to the rule. When the south wester is at work
in the Cape, he says "die ander ouens sal nie waag om hulle aeries uit die hanger te stoot nie, maar ons kan
mos want ons vlieg gyro's" :lol:
With the training on mountain flying he gives, he must be used to windy conditions.

One day... when the UFO is able to fly down that way, I would like some of his knowlage
to rub of on me.

QNH this morning 1021, good reason to get into the air again (^^)

Re: QNH

Posted: Wed Jul 27, 2011 8:44 am
by Gyronaut
Flynote has it exactly right as I understand it.

Thanks for the vote of confidence but I want you to know that I am still learning, every day. And that's the beauty of our sport, we're competing against ourselves to have as much fun as we can, as safely as we can, while there be dragons.

Please don't take my statement about flying in wind lightly in that I will not fly in conditions that I am not comfortable that both the Gyro and I can take it, safely.

Fly Safe, not Save. :lol:

Re: QNH

Posted: Wed Jul 27, 2011 9:12 am
by MPL Pilot
Len, flying with you that day was a awsome expierience.

From a microlight background, and a novice gyro pilot, it gave me a lot of
confidance in the gyrocopters ability to fly in windy conditions.

As it is often said, gyro's are aviation best cept secret ##