Hi,
thank you for comments.
Massimo,
you are right, I forgot them. However, some Il-4 had both stiffeners and handles, some of them on handles and others nothing. But mine has them both, at least according to the shadow, so I corrected it and replaced top-view profile in my previous post.
Regards,
66misos
Hi 66misos. Handrails were on all Ilyushins, with no exceptions, it are located only on the left side. Stiffeners was only at Il-4 at 1942 production and later. There were no stiffeners on the dB-3F. The last photo of your post is a second prototype of the DB-3F. The turret photos is a late production DB-3Fs.