Jump to content

Sign in to follow this  
michal

Airspeed question - How real is this?

Recommended Posts

Yesterday morning I was operating a flight from Sydney to Perth (B767-300ER) at FL360.FSMeteo had forecast winds aloft at up to 123kts and this eventually, for a period, became a reality from dead ahead. The windspeed indicator was only showing 99 but it only has a 2 digit display.The flight plan was set at a speed of Mach.85 and this was being maintained. However, during the period when the wind was >100 the airspeed indications became inconsistent much of the time, jumping erratically from .85 to .88 down to .82 and even up to .89 occasionally with the result that the overspeed alarm was sounding quite a bit. Despite this the aircraft remained reasonably stable - just a bit of rocking and rolling. Later, the wind dropped to around 94 and serenity (and sanity) returned.So what I am asking is - was that erratic speed experience as real as it gets or a bit over the top?Pat

Share this post


Link to post
Share on other sites
Guest

Hi. Well ive been flying real world for some time now and never seen anything that eratic. The only time ive gotten the chicken clucker because of changes in winds is when im up against the barber pole flying morale speed.Besides turbs the wind speed changes are very smooth..You glance at the ehsi and notice the winds are at 105. And then the next time you glance they are at 45 and you never noticed the change.Ive never seen the mach jump around. Maybe from .854 to .862...but smoothly.

Share this post


Link to post
Share on other sites

This could theoretically happen only with during extremely sudden wind change speed (and aircraft needs a few secends to adjust to the new speed). I suspect the problem may lie in the way your weather program generates winds.Michael J.


Michael J.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  

  • Tom Allensworth,
    Founder of AVSIM Online


  • Flight Simulation's Premier Resource!

    AVSIM is a free service to the flight simulation community. AVSIM is staffed completely by volunteers and all funds donated to AVSIM go directly back to supporting the community. Your donation here helps to pay our bandwidth costs, emergency funding, and other general costs that crop up from time to time. Thank you for your support!

    Click here for more information and to see all donations year to date.
  • Donation Goals

    AVSIM's 2020 Fundraising Goal

    Donate to our annual general fundraising goal. This donation keeps our doors open and providing you service 24 x 7 x 365. Your donation here helps to pay our bandwidth costs, emergency funding, and other general costs that crop up from time to time. We reset this goal every new year for the following year's goal.


    18%
    $4,590.00 of $25,000.00 Donate Now
×
×
  • Create New...