atc_type/atc_model

Does anyone know much about 'atc_type' and 'atc_model' in aircraft.cfg? I think it controls what they call the aircraft in ATC but I'm getting funny results when editing it
I have the westland merlin addon but they only call it '...type westland *gap*' in ATC, in aircraft.cfg I have these lines under '[General]'
atc_type = Westland
atc_model = Merlin
if I swap those over ATC then calls the chopper "...type merlin *gap*", so FSX has the ability to say both words, it just doesn't want to say them together
I checked other CFG files and the robinson R22 has:
atc_type=Robinson
atc_model=R22
but ATC refers to it as "...type Robinson R22 Helicopter", where does the 'helicopter' come from?
I've downloaded the Piaggio Avanti and aicraft.cfg has this:
atc_type = PIAGGIO
atc_model = P180
but ATC calls it "...type Piaggio Avanti", nowhere in the CFG does it have Avanti written down on it's own, so I don't get how FSX is working this out
is there some other file or some other part of the CFG where this is really supposed to be changed? or just something I'm missing? I know FSX has the ability to say most of these words but I think it's a bit choosy sometimes
I have the westland merlin addon but they only call it '...type westland *gap*' in ATC, in aircraft.cfg I have these lines under '[General]'
atc_type = Westland
atc_model = Merlin
if I swap those over ATC then calls the chopper "...type merlin *gap*", so FSX has the ability to say both words, it just doesn't want to say them together
I checked other CFG files and the robinson R22 has:
atc_type=Robinson
atc_model=R22
but ATC refers to it as "...type Robinson R22 Helicopter", where does the 'helicopter' come from?
I've downloaded the Piaggio Avanti and aicraft.cfg has this:
atc_type = PIAGGIO
atc_model = P180
but ATC calls it "...type Piaggio Avanti", nowhere in the CFG does it have Avanti written down on it's own, so I don't get how FSX is working this out
is there some other file or some other part of the CFG where this is really supposed to be changed? or just something I'm missing? I know FSX has the ability to say most of these words but I think it's a bit choosy sometimes