Littles details

Hi Gilles

Thanks you for reaching out!

I've read your post up here, very interesting indeed!

Now for the "voice"- the only two sentences which are "spoken" in the cockpit are:

"Engaging Autopilot/Autopilot disengaged"
"Tail wheel is locked/Tail wheel is unlocked"

These voices are engineered so it would not sound "synthetic", but will sound as if a crew-member (the other pilot) is talking in the internal microphone system while moving these two switches.

The reason for this is simply to allow a confirmation of these two specific actions, since there is no other confirmation existing other than the switches themselves. I was a DC-3/C-47 pilot myself, and usually, these switches are being operated following a checklist or other crew-members coordination (pilot/co-pilot). So I've decided to insert these two spoken sentences as a feedback, because once we hear "Tail wheel is locked", it enters our brain. Like in real world operation.

Now, there are several 3rd party checklist plugins (not part of the DC-3 but add-ons which can be added and used) which has a comprehensive voice-over for the checklists. These are also quite normal as the cockpit work in real life is always involving reading and confirming SOP (Standard Operating Procedures).

So..these synthetic voices are not a "system induced" announcements, but to be considered as a crew-member reading or confirming Standard Operating Procedures.

I hope that my answer is useful for you!

Thank you very much for your feedback and inputs!