Nope, if you neglect to "feather" (retard the prop lever to the stop) the propeller will not feather. When the engine RPM slows below the specified RPM (750 RPM if I remember correctly), locking pins engage, and prohibit the propeller from being able to feather fully...now if you were hear in person, I could draw you a killer Picaso on the markerboard
ATP guys/gals fly these things way more than I have...so maybe they could give you specifics
Have fun with this add-on Mista...and get your PIC so you can get your MEI ASAP! --- just a suggestion...
Lax