I have recently installed Dynon AP servos on my RV-8 and will be controlling them with my D-10A temporarily while building Skyview panel on the bench. Can anyone recommend a source for an AP disconnect button? I only have trim and PTT on control stick. I am considering a throttle mounted GA button but simply need a normally -open pushbutton switch to ground.
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AP DISCONNECT BUTTON
- Thread starter Aquaman!
- Start date
Carl Froehlich
Well Known Member
PaulvS
Well Known Member
Carl beat me to it! This will do the job: (and same/similar are widely available from any electronics store)
www.steinair.com
Momentary Push Button Switch, 1/4" - Steinair Inc.
Off-(On) push button momentary action switch with black cap. Switch is normally Off & the On position is momentary. The switch is rated at 1 amp. The switch has solder type terminals & mounts in 9/32 inch round hole.
www.steinair.com
Yep 2 for that push button Between the throttle and prop.Carl beat me to it! This will do the job: (and same/similar are widely available from any electronics store)
Momentary Push Button Switch, 1/4" - Steinair Inc.
Off-(On) push button momentary action switch with black cap. Switch is normally Off & the On position is momentary. The switch is rated at 1 amp. The switch has solder type terminals & mounts in 9/32 inch round hole.
Since you are thinking of upgrading your throttle handle there is a nice one one from 3D Stick & Rudder that would would work. I have this exact throttle handle in my RV-8 but use the TOGA button as a PTT instead, Paul can label it however you want. I am going to change this throttle handle to a different one so mine will be available if you are interested.
You can see a lot of good options on his website below:
TO/GA or PTT switch within "LH CONFORMAL Throttle" — 3D Stick & Rudder
Located at your throttle command thumb, either PTT or TOGA.
www.3dstickandrudder.com
I do appreciate the pics... I would be be interested in this grip if it fits my throttle lever.Since you are thinking of upgrading your throttle handle there is a nice one one from 3D Stick & Rudder that would would work. I have this exact throttle handle in my RV-8 but use the TOGA button as a PTT instead, Paul can label it however you want. I am going to change this throttle handle to a different one so mine will be available if you are interested.
You can see a lot of good options on his website below:
TO/GA or PTT switch within "LH CONFORMAL Throttle" — 3D Stick & Rudder
Located at your throttle command thumb, either PTT or TOGA.
View attachment 55621
If you have the Vans standard throttle handle it will fit. That’s what I have & it’s a good fit and easy install
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Food for thought… 3D Stick & Rudder makes a throttle grip that can incorporate TWO switches. Ergonomically, IMO, it makes sense to have flaps UP/DOWN and TOGA switches on the throttle grip. As you initiate a go-around, click TOGA button (finger) and raise flaps (thumb) as throttle is advanced. Keep in mind that the Dynon AP disconnect button doubles as a CWS button. Since you have to hold the button down for CWS, it makes sense for this to be on the stick. Just my 2¢ worth.
What does the TOGA button do on an RV?
TOGA = Take Off Go Around. Usual function is to command the autopilot to discontinue the approach, pitch the nose up to climb attitude. Throttle must be advanced manually, so having the button on or near the throttle makes sense.
It depends… If you don’t have a flight director (FD), then a TOGA button does nothing. If you have a FD, pressing the TOGA button will sequence the flight plan to the missed approach procedure and the FD will provide guidance (vertical and lateral) for the pilot and/or autopilot to follow accordingly.
Desert Rat
Well Known Member
It depends on which flight director you have, which is why you'll get conflicting answers. Some of them like the G1000 systems in Cessnas before about 2021 disconnected the autopilot and the command bars just commanded a wings level pitch up. Some of them sequence it to the missed approach segment. If you don't have an approach loaded or are hand flying, they will still just command a wings level pitch up.
Sequencing to the miss makes sense. I wish they all worked that way.
