PPRuNe Forums - View Single Post - Wind velocity indication on ground??When?
Old 14th February 2007 | 21:53
  #13 (permalink)  
NigelOnDraft
 
Joined: Jan 2001
Posts: 2,044
Likes: 0
From: UK
Miserlou....
How accurate is your ASI below 60kt?
Not very... Hence why I said
It will require an ASI reading (v INS GS), so will only "click" in with some forward airspeed, hence why it appears on TO,

The computer is certainly not quick enough to keep up with turns
I don't know your company SOPs, but mine tend to suggest not turning during TO
or changes of airspeed in the air on a second to second basis and always needs a few seconds of constant state to come with the correct answer so the data you get on the ground will never be reliable
Disagree... certainly on the Airbus and 757/767...
What use is it whilst you're taxiing or bowling down the runway?
I've never mentioned taxiing I have looked at it in the latter stages of Takeoff for (potentially excessive) TW... Not sure how I would "action it", but it sure is useful to report back to the tower the actual tailwind on takeoff when they are giving incorrect figures (deliberately or otherwise ).
I reiterate my point about getting into the books My ATPL notes, from 1994, clearly state that to get a valid W/V solution, all you need is an INS and a TAS input. The latter, as I had already suggested, and you confirmed, is unlikely to be valid below ~@50K.
The topic did start off with a request
All replies are MOST welcome pls
and
ANY more input is welcome
. I suggest the questioner wanted some technical answers rather than you just slagging everybody off who tries to help
NigelOnDraft is offline  
Reply