Speed Intervene

[nawarren 83]

Hi All,

 

I fly the 737ngx online with vatsim quite a bit, and often on descent I like to use speed intervene to adjust my descent rate. However I have a really annoying problem where say I have selected 280kts in the speed window, seemingly randomly the speed will drop to 100kts and I can't change it. If I dial 280 back on the speed it will go back to 280 briefly then drop to 100 again.

 

It's driving me nuts, I thought I new the autoflight and FMS pretty well. Am I missing something here, I was under the impression that speed intervene was only controlled by the speed dial. The drop to 100 seems to me like a bug. Any ideas?

 

Cheers

 

Neil

[Spin737 102]

The IAS drops to 100? That's not good. You're not stalling out of the sky? Something's not right.

 

Any chance you can try again and get some screen caps?

[nawarren 83]

Hi Matt,

 

Yea it's a weird one. I forgot to mention that I use the CP flight MCP RS232 to select auto flight functions. Maybe there's a problem with the hardware. Although I can't think what. I will try and get a screen shot next time I fly.

 

Cheers

 

Neil

Hi Matt,

 

I don't stall because I take manual control of the thrust. If I did nothing then the speed would decay to 100. Not good.

 

Cheers

 

Neil

[kevinh 409]

It's highly likely it's your hardware causing this. Easy to check, just unplug it and see if you can replicate the problem.

[nawarren 83]

Hi Kevin,

 

I think you are correct. I will try it without the CP and see. Am so used to flying with MCP it will feel weird without! Thanks for the suggestion.

 

Cheers

 

Neil