Go around button on xls throttle?

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Expand view Topic review: Go around button on xls throttle?

Re: Go around button on xls throttle?

by dmloftus » Sat Feb 04, 2023 10:56 pm

CFIDave wrote: Tue Feb 20, 2018 5:15 am ... the GA button doesn't kick off the autopilot. All you have to do after hitting the Go-Around switch on the throttle is to apply full throttle and raise flaps (and gear on Diamond twins), i.e., you eliminate steps 3, 7, and 8 in the instructions I provided earlier in this thread.
In ESP versions, does the green GA still appear in both Lateral and Vertical mode status boxes (like older models) or does it remain as GPS/GP? Got wondering as I was watching Smithsonian's Air Disasters last night about an Air China accident at Nagoya where the FO accidentally hit the TOGA and they didn't notice the panel indicator. No manual stick override on the original A300's and they stalled over the runway. Out of curiosity, tried checking latest release of MSFS2020, no GA in the status boxes.

Re: Go around button on xls throttle?

by Ed McDonald » Thu Nov 03, 2022 2:09 am

Without envelope protection provided by the ESP the risk is a coupled go-around causing a stall if either too low of a power setting or too high pitch attitude is selected by the pilot.

The fly-by-wire aircraft such as the Airbus’s and Boeing 777/787 do fully coupled go-arounds integrated with autothrottles and envelope protection, with or without the autothrottles.

Re: Go around button on xls throttle?

by OriensFlight » Thu Nov 03, 2022 12:07 am

Just curious, what was the logic in having the Go-around button disconnect the autopilot on the models without ESP (Electronic Stability and Protection)? Would it have been too dangerous?

Re: Go around button on xls throttle?

by gordsh » Tue Feb 20, 2018 3:02 pm

Thanks. I used it a couple of times after reading up on it and thought I was using it the incorrect way. I find it very comforting especially when there is a strong cross wind on the climb out and the plane is all over the place. I can see that perhaps more experienced pilots don't use it but I like it. Thanks for the clarification.

Re: Go around button on xls throttle?

by CFIDave » Tue Feb 20, 2018 2:55 pm

gordsh wrote:This may be a silly question but do you recommend using the ToGo button on a normal takeoff/departure as a way of using the FD for wings level and best rate of climb guidance? Then turning it off once you have reached circuit altitude?
Not a silly question at all: Yes, that's another appropriate use of the Go-Around (GA) button on the throttle. While I don't normally use it for takeoffs, if I were taking off IFR with low visibility or into relatively low ceilings, it would be very helpful. (I'm not at all suggesting zero-zero takeoffs, but the Flight Director climb guidance bars would help enable this. I know of some CFIs who have their students try a similar takeoff in VFR conditions while "under the hood" using foggles just to see what it's like.)

Re: Go around button on xls throttle?

by gordsh » Tue Feb 20, 2018 2:20 pm

This may be a silly question but do you recommend using the ToGo button on a normal takeoff/departure as a way of using the FD for wings level and best rate of climb guidance? Then turning it off once you have reached circuit altitude?

Re: Go around button on xls throttle?

by CFIDave » Tue Feb 20, 2018 5:15 am

Paul wrote:I thought you had to hit NAV. In other words, you push the TOGA button, the autopilot stays connected and pitches up into the command bars and starts to climb (assuming you add power) and GA is annunciated at the top of the PFD. But the autopilot won't sequence until you hit the NAV button, at which point it will follow the missed procedure.
No. One of the big benefits of a newer ESP-equipped GFC700 plane is that the G1000 will continue to sequence with coupled autopilot to fly the missed approach; the GA button doesn't kick off the autopilot. All you have to do after hitting the Go-Around switch on the throttle is to apply full throttle and raise flaps (and gear on Diamond twins), i.e., you eliminate steps 3, 7, and 8 in the instructions I provided earlier in this thread.

Pushing the NAV button is required for non-ESP planes to reengage the autopilot and fly the missed approach procedure to reach the missed approach holding pattern.

Re: Go around button on xls throttle?

by Paul » Tue Feb 20, 2018 3:58 am

CFIDave wrote: IMPORTANT NOTE: If flying a newer (roughly 2015+) DA40/DA42/DA62 with GFC700 equipped with ESP (Electronic Stability and Protection), this procedure is much simpler since the Go-around switch will not disconnect the autopilot. Instead, the autopilot will automatically sequence the GPS flight plan to fly the missed approach in coupled mode.
Is this right in the Diamond? I thought you had to hit NAV. In other words, you push the TOGA button, the autopilot stays connected and pitches up into the command bars and starts to climb (assuming you add power) and GA is annunciated at the top of the PFD. But the autopilot won't sequence until you hit the NAV button, at which point it will follow the missed procedure.

Re: Go around button on xls throttle?

by TJS » Tue Feb 20, 2018 2:00 am

They have an awesome sim too if the weather craps out. Check out their website www.dfclondon.com
In the fleet tab click on the FTD-da42 level 5. I have over 20hrs in it for my IFR and Multi. nice unit and cheaper than flying.

Re: Go around button on xls throttle?

by TJS » Tue Feb 20, 2018 1:51 am

I got my IFR training in London at the Diamond Flight Centre, they are fantastic. Same ownership as the factory but operates separately in their own building. Definitely be money well spent.

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