Based on Boeing 707-120.

Hi
Omg it's da 707 propeller :Q
It's fully fictional don't worry.
Generic version (Original 707)
Jump to B707-420 Condor post

Desc:

Boeing 707-18P (Boeing Qprop) or ZerkkAirborne ZA-CT180 is a combi airliner introduced in 1990, designed to handle both passenger and freight operations in one airframe. Based on the classic Boeing 707, the ZA-CT180 replaces the traditional jet engines with four high-efficiency turboprop engines, giving it improved fuel efficiency and STOL Capable. The plane was joint effort between ZerkkAirborne and Boeing. In 1992, only 2 CT180 were remain operated while the other was retired due to replaced by ZA-200.

CONTROL & ACTIVATION GROUPS:

VTOL - Flaps
Trim - Trim
Ag1 - Strobe, Landing Lights, Beacon
Ag2 - Reverser and pushback
Ag3 with Brake - Spoiler/SpeedBrake
Ag4 - Cabin Lights
Ag5 -Freight door
Ag8 - Engines, Nav, Beacon and Taxi Lights

Creator note:

It's actually Build with this blueprint ref:

The title say b707 concept. So that's why I make this.

Have fun!