anyone familiar with the DM flight BAC 111

[fulanito_uk]

Love the plane, but having a problem with it (user error i fear) when I go over 11,000ish i get an alarm that I can not ID... the plane carries on flying no probelm but with a beeeep beeeeep beeeeeep alarm in the back ground (not stall, overspeed) when i fly to about 7000ish feet it goes away.... any ideas?

Thanks

[SeanTK]

Just a guess, but have you properly set up the aircraft's pressurization system? (Does it have one?)

If this aircraft has an instruction manual/operating handbook with it, I would suggest reviewing it.

[fulanito_uk]

I hope this works.. Thanks

Cabin Pressurization - Set & check
Select a minimum of 2000 ft cabin altitude.  The pressure will gently adjust until it reaches the set level.
The rate of change is set by default to a reasonable 400 ft/min (gauge bottom right), so there is no need to adjust that.
Any more than a 400 ft/min change in cabin altitude (pressure) could upset your passengers.
Once in the climb, you should raise the cabin altitude again to keep the aircraft's pressure differential (bottom left) at a reasonable level. I won't be reminding you about this during the flight.