I think you will find Garmin don’t want the capability out there without underspeed protection. I very much doubt it is down to the regulators.
The Mustang doesn’t have the capability either. The new PA46s with USP do.
I strongly suspect regulatory gold plating.
Cobalt wrote:
The reason the latest generation of autopilots can do this is not that they have protections, but they can smoothly adjust the pitch for the correct speed.They should never come near the point where the protections kick in
Except the DA42 doesn’t have this coupled go-around feature, even though it has a speed aware autopilot with FLC mode etc. It’s the additional of USP in the DA62 that got this feature through certification (even if you need the speed awareness for it to function…).
… and the obvious upside is that the pilot can do all that without risking loss of control by momentary distraction close to the ground…
Non-speed aware autopilots could not fly the transition from approach to climb safely – while they know what the right attitude for the climb is, they have no way of knowing how fast to adjust the pitch. Hence they can show you the pitch angle you should aim for, but leave it to you to raise the nose as appropriate.
The reason the latest generation of autopilots can do this is not that they have protections, but they can smoothly adjust the pitch for the correct speed.They should never come near the point where the protections kick in
On most aircraft the GA button disconnects the autopilot, sets the flight director bars to a suitable pitch up, and sequences the FMS onto the first point in the missed approach procedure. The obvious downside to keeping the autopilot engaged is what happens if the pilot doesn’t increase the power enough, retarcr the wheels, etc
nokicky wrote:
Yes, you just hit the GA button on the side of the throttle handle
Same as in the SR22 G5 I did my IR on.
nokicky wrote:
Yes, you just hit the GA button on the side of the throttle handle
That’s pretty clever!
Looking forward to the same in the RV-14A I’m building…
JasonC wrote:
ie you never disconect the A/P during the go around?
Yes, you just hit the GA button on the side of the throttle handle
nokicky wrote:
The DA62 will fly a go-around on the autopilot
You mean fully coupled ie you never disconect the A/P during the go around?
The DA62 will fly a go-around on the autopilot because the installation in the GFC700 will not stall in pitch-hold mode because USP will kick in (under speed protection).
Obviously you need to apply power (no auto-throttles). It was the addition of USP that got this through certification, otherwise you might end up in a stall very close to the ground if you forgot to apply power…