certainly moreso than they've given credit for, they're often said to be weaker than the american bombers but that's mostly the B-17, just what is tougher than a B-17
I was trying to find the Power off/clean feathered glide ratio of the 47 - didn't find anything reliable. Saw some that said 1:1, but I wouldn't think that could be right, it's so damn low. At that rate you'd need 6,000ft to glide 1nm
Even my bulky TC-12B glides at 12:1 clean w/ both props feathered.