AOA audible output

[Dennis Scearce(Guest)]

I currently have a D10 in my Progressive Aerodyne Searey. I am using the Dynon unheated Pitot and have the AOA feature enabled and calibrated. I want an audible stall alarm and could install the ACI stall alarm (available from Aircraft Spruce), but it appears that I could spend $50 more and upgrade to the D10A and get this feature, along with the improved D10A unit.
I have three questions: 1) is the audible warning a voice or horn? 2) Is the amount of speed before the stall when the warning occures adjustable? 3) If not, when does the audible warning occur (which end of the red ribbon on the AOA readout and how many knots prior to reaching that point)? I looked in the D10A on line installation manual and couldn't find the answers.
Thanks,
Dennis

 

[dynonsupport]

Hi Dennis,

The AOA alarm is a tone, not a voice alert. However, you can configure the tone to come on solidly just shy of the critical AOA, or as a beeping tone that beeps faster and faster as you progress from high AOA to critical AOA (where it is also a solid tone). The alarming threshold isn't adjustable today. As speeds vary from aircraft to aircraft, the alarm does not come on at a set amounts of knots before the critical AOA.

If you set the alarm up as the "progressive" beeping tone, it starts beeping when 3/4 of the way up the yellow bar. Regardless of setting, the tone is solid at the yellow/red boundary.

 

[Dennis Scearce(Guest)]

Thank you for your reply. I like the idea of the progressive warning. Before I commit another $350 to the value of my plane, will you please answer these additional questions:
1) The Searey is an amphib with retractable gear. I use a gear warning system, with audible alert through the earphones. If I connect the Dynon D10A to the same earphone jack connections, will the gear warning system damage the Dynon unit when it announces my gear position?
2) I do not use a mode C interface to the Dynon. In that case, will the plug type and pin connections be the same (except for the two wires for the AOA tone)? In other words, can I just do a straight swap or will I have to do some rewiring?
3) I currently do not have the EMC option. What is the cost if I want to go ahead and add that while I'm switching?
Thank you for your help.
Dennis

 

[dynonsupport]

Dennis,

Hooking the gear warning up in parallel with the D10A will not hurt the EFIS, but without knowing how the gear warning system is designed, we can't be sure if it will be okay with that kind of connection. At a minimum, you probably want a 1K resistor on the output of each device before you tie them together just to be safe, or you could use an audio isolation device.

If you don't use the encoder output, the pinout of the D10 and D10A are identical. You will obviously need to add the wire from the AoA alarm output though.

The EDC-D10A (remote compass) is $100 and can be added to any EFIS at any time.