Hello e-pilot and guys,
I have to say again, I am very happy that someone finally take over this aircraft and continue in the developement. But if you want to implement a new feture into your model, please, spend some time by studying the real thing before you start to model or simulate it.
I've recently downloaded the latest version from e-pilots site and try it. I noticed the airspeed control cursor knob has been added to the airspeed indicator gauge. I checked it out and found it is used in absolutely wrong way. Same wrong way it is used in B 707-400/300 model.
So what is wrong. You've mixed up several features of the airsped indicator: Vmo pointer (hand), airspeed markes, and airspeed cursor. You've basically used the Vmo pointer (red and white hand) as a speed marker used for nothing but the speed reminder for pilot which can be adjusted by airspeed coursor knob.
But real thing works as follow:
Red-white hand is Vmo pointer and shows maximal operating speed - the speed which shouldn't be never deliberately exceeded. No surprise, this cannot be set by a pilot by any means. It is driven directly or (as in this aircraft) through the flight computer from pitot static system. This is because airliners operate in broad ranges of altitudes and therefore in broad ranges of static pressures and temperatures. The INDICATED airspeed displayed by airspeed indicator depends on the static pressure and temperature and threrfore on the altitude. With rising altitude the indicated airspeed drops down whilst the TRUE (real) aircraft speed relative to the ambient air stays same. So does the Vmo. In the simulator, this pointer should be simulated simmilar way to the altimeter. Create for example some look-up table with pressure altitudes and related Vmo values to control the pointer.
The knob in left bottom corner. This operates the airspeed cursor bug. The orange bug which is not included in your model. See for example page 549 and 550 of this document:
http://www.lt-vacc.org/images/mesti/Boe ... Manual.pdfor photo of real B737 airspeed meter:
The bug shows comanded airspeed for autothrottle and can be also set also from the autopilot/flight director panel by airspeed knob.
Airspeed markers (white bugs around the dial in the photo):
Also not included in your model. These are intended for the purpose you've used the Vmo pointer. Pilot can set these markers as desired usually to remind himself some important speeds, for example Vref at the approach. In real aircraft you can slide these bugs around the dial for example by the nail.
Cheers
Honza