I guess i must remind you all that the il-16 were always short ranged front line fighters.
You will NEVER see these planes attacking each other from airfield to airfield.
The later more capable versions while having more guns and such, also have engines that use MORE fuel, it is in that sence the more ubber version of the il-16 will suffer from range more than the early versions.
Regardless, this will be a NOE buster upper, because the planes so small and light and decently armed it should prove able to knock some attackers off a town.
:Edit: and no, the tiny little drop tanks wont really matter that much when it comes to getting this planes butt to another airfield. Most 16's will find them selfs crash landing with no fuel long before they get shot down in alot of cases.
-Throws two cents-