Question about white arrow in speed tape

[flightdeck]

http://www.world-of-smilies.com/wos_weihnachten/weihnachten17.gif

Happy New Year to all of you, guys!
2008 ... unbelievable how fast time goes by ...

Let's start the new year with e new question: Sometimes I observe a solid, horizontal, white arrow in the speed tape of the PFD (PM Boeing Glass Cockpit)! Has anyone an explanation for me what this means?

Cheers
René

[Westozy]

Probably the speed predictor, when you push the throttles arrow points up, pull throttles back and arrow goes down.

Gwyn

[flightdeck]

Hi Gwyn,
unfortunately not, the trend arrows you mean are green and narrow and point up and down from the speed indicator.

The horizontal arrow bar I mean is solid white and fixed on the moving speed tape, not on same place on different flights.

I'll try to make a screen shot, when it appears next!

[flightdeck]

Like this:

http://www.billiani.eu/WEB/pfd737.jpg

[JonathanRichardson]

Hi

I think that is the V2+15 or the VREF+15 white arrow bug, but perhaps your graphics card or something is causing it to be drawn incorrectly. It should normally be a tiny pointed white line. I have never seen it like the screen shot posted (that is if it is indeed the +15 arrow). I presume you are using latest builds, if so, I think it points to a graphiccard / driver issue on your system.

Regards
Jonathan Richardson