Tupolev Tu-4 - overview of versions:
Tu-4 - main serial version
Tu-4R - machines modified for remote photographic reconnaissance
"Tu-4 REP" - machines modified for radio-electronic reconnaissance and combat
Tu-4A- machines capable of carrying atomic bombs
Tu-4K (Tu-4KS) - a series of machines modified to carry anti-ship missiles KS-1
Tu-4D - paratroopers adapted from the production Tu-4
Tu-4T - prototype transport aircraft modified from production Tu-4
Tu-4USS - machines modified for bombardier training
Tu-4 "komandirskiy" - machines modified for command posts
Project 926 - prototype of the Chinese flying control and early warning centre
Tu-4 "ban 20" - machines modified to collect data on US atomic tests
Tu-4 "retranslator" - modified to communicate with submerged submarines
Tu-4 "Burlaki" - a machine modified to tow two MiG-15bis
Samoljot "79" - project with M-49TK engines
Samoljot "94" - project with TV-2 turboprop engines
Tu-4 tanker - several modified pieces
Tu-4LL - engine test machines
Source:[/b
Gordon, Yefim, Rigmant, Vladimir. OKB Tupolev: A History of the Design Bureau and its Aircraft, Midland Publishing, Hinckley 2005. ISBN 1-85780-214-4.
www.tupolev.ru