PPRuNe Forums


Rotorheads A haven for helicopter professionals to discuss the things that affect them

Reply
 
Thread Tools Search this Thread
Old 3rd Jan 2017, 10:31   #1 (permalink)
Thread Starter
 
Join Date: Nov 2006
Location: South Africa
Posts: 10
EC145 PFD Barometer Unit Change?

Hey guys,

We're just curious to know if there's an easy way to change the barometric units on an EC145 (BK117C2) between inches of mercury and hectopascals?

Just to make life easier for over border flights?

Thanks a mil!
Abri_Beluga is offline   Reply With Quote
Old 3rd Jan 2017, 15:01   #2 (permalink)
 
Join Date: Apr 2000
Location: EGDC
Posts: 5,729
Surely any ATC unit worth their salt would just give you the pressures in whichever you asked for.
crab@SAAvn.co.uk is offline   Reply With Quote
Old 3rd Jan 2017, 15:11   #3 (permalink)
 
Join Date: Feb 2006
Location: Germany
Posts: 523
European helicopter - works with metric values
but they are so kind, to provide you with :
1.) Standard Atmosphare Table (1-13) which shows hPa and in.Hg
2.) Conversion Chart
3.) numbers: 1 hPa (mbar) = 0,02953 in.Hg // 1 in.Hg = 33,865 hPa (mbar)

;.-) ;-) ;-)
Flying Bull is offline   Reply With Quote
Old 4th Jan 2017, 05:44   #4 (permalink)
Thread Starter
 
Join Date: Nov 2006
Location: South Africa
Posts: 10
Thanks for the replies guys. Yeah, we can just use the conversion chart.

We have a machine from the US, but it's PFD is in inches of mercury.
I know a lot of aircraft have a little toggle switch to select the units. Was just wondering if there's something similar in this one.

Thanks!
Abri_Beluga is offline   Reply With Quote
Old 4th Jan 2017, 17:54   #5 (permalink)
 
Join Date: Dec 2003
Location: The Northwest
Age: 51
Posts: 389
Hi Abri Beluga,

You need to change the unit system in the VEMD Configuration Page.

This process is described in the FLM Section 7. The process is the same for all CPDS aircraft and in the EC135T3 it's section 7.12.

The process involves selecting switches in a set order, the FLM describes it best.

Any problems, let me know and I can send you the section from the FLM.

FNW
FloaterNorthWest is offline   Reply With Quote
Old 10th Jan 2017, 15:21   #6 (permalink)
 
Join Date: Nov 2006
Location: "Why more people doesn't help - n(n-1)/2"
Posts: 1,263
FNW,

Have you actually tried this or read the manual closely?

You cannot change the PFD sub scale from the CPDS Config page.

Software change in the FCDS only -

If the configuration file needs to be written it is expensive. That depends on your avionic install config and whether it has previously been coded with the scale type required.

Easiest fix - replace the 2" STBY ALT with a dual sub-scale one.
RVDT is offline   Reply With Quote
Old 10th Jan 2017, 22:03   #7 (permalink)
 
Join Date: Nov 2007
Location: 55 degrees north ish.
Age: 46
Posts: 182
Doesn't the aircraft have a standby altimeter, which normally has both Inches and hPa on it?
RotaryWingB2 is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT. The time now is 22:40.


1996-2012 The Professional Pilots Rumour Network

SEO by vBSEO 3.6.1