1. ## Standard Rate Turn

I'm having trouble getting the autopilot to turn fast enough. I'm using a
Citation X.

From a previous thread, I know there's an autopilot bank angle setting in
the aircraft.cfg file, and I changed that from 20 to 25, but the bank angle

I'm getting isn't anywhere near that. I just tried changing that to 30,
hoping that will work.

Also I noticed PM offset x552A, which is be default set at 25. I'm going to

experiment with a higher value. The docs say that setting it at 1 is

Thanks!

David Rabiner

2. ## Standard Rate Turn

How slow is too slow???

Having actaully flown a Citation in the real world, I can tell you that
standard rate turns are relative. If you are talking about being able to make a
complete circle (with or without) the autopilot within 2 minutes you would
need such a bank angle at those kind of speeds that you would make the
passengers very unhappy not to mention the G load you would put on the
aircraft. The fast you go the longer it will take to make the turn.

Phil

3. ## Re: Standard Rate Turn

That's a great point, Phil.

I think I remember reading somewhere that, at higher speeds, the autopilot
should command 1/2 standard rate, which is 1.5 degrees per second.

I wonder if higher speeds means cruise speed as well. What turn rate do you

figure a real Citation (or any other jet, for that matter) autopilot would
command at cruise speed. If it's 1/2 standard rate, that means a 30 degree

turn at a waypoint would take 20 seconds...

I have no idea. I've never flown anything bigger than a Cessna 172!

David

4. ## Re: Standard Rate Turn

David,

Just POF for my ATPL's and doing Turn rates etc forrmula below will work out

For this one you must use the formula Radius = TAS (squared) divided by g
(9.81m/s/s) x Tan bank angle

You must must use SI units so convert the speed from knots to meters per
second. Kts x 0.515 is good enough.

regards Paul

5. ## Re: Standard Rate Turn

Now that was a fun little formula to play with!

D