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Dahir Insaat AzureQuad Rail

AzureQuad Rail front view


AzureQuad Rail
Dahir Insaat 
Istanbul, Turkey

Russian engineer and inventor Dahir Semenov, also known as Dahir Kurmanbievich Semenov, has a long track record of imaginative and occasionally terrifying, visions of future technology. His company name, Dahir Insaat, is Turkish for Dahir Construction and was founded in 2006. The Fire Fighting Rescue electric vertical takeoff and landing (eVTOL) and ground vehicle one of his most intriguing designs, and is part of a larger number of ideas for gyroscopic vehicles. Semenov has designed a multitude of concepts from buildings, to ground vehicles, trains, eVTOL aircraft and more.

Dahir Insaat's AzureQuad Rail is a high capacity four level eVTOL aircraft concept design and is generically called a "flying train" by its inventor because it has a unique design where the aircraft flies above a stationary electrified rail with a long power chord trailing from behind the aircraft.

Based on the inventor's interior cutaway view drawings, the top two levels (deck three and four) of this aircraft would hold approximately 2,816 passengers and the first two levels (deck one and two which are in it's lower narrow fuselage) hold approximately 250 to maybe 300 passengers. The entire aircraft might hold in the range of over 3,000 people. Because the aircraft uses an umbilical chord to receive electric power, this allows the large aircraft to fly and at the same time have zero emissions.

A unique feature of the aircraft is there are skylights which form a cross pattern over the top of the fuselage, giving the illusion of more space, providing nice views and allowing the sun to shine inside the passenger compartment. In addition, the AzureQuad Rail fuselage has an untraditional box-shaped fuselage with four large stationary ducted fans protruding through the passenger compartment. At the top rear of the aircraft are two vertically mounted ducted fans for forward flight.

The aircraft is designed to land on top of an airport-type terminal and passengers enter and exit the aircraft in the open air, without the use of an enclosed gangway or jetway (officially called a passenger boarding bridge). For landing, the aircraft has a retractable wheeled quadricycle landing gear arrangement. It is possible that the aircraft has been designed so that if the landing gear malfunctions and won't automatically lower, that the aircraft can land safely on its own fuselage. Because the aircraft is a multicopter without wings, it would have a much larger power consumption than aircraft using wings for lift.

The company is looking for investors to begin building the aircraft, terminals and the power rail system.


  • Aircraft type: eVTOL high capacity aircraft
  • Piloting: Unknown
  • Capacity: The aircraft is a four-level, high capacity passenger aircraft holding approximately over 3,000 people
  • Maximum payload: Unknown
  • Propellers: 6 ducted propellers (4 VTOL-only propellers, 2 propellers for forward flight)
  • Electric Motors: 6 electric motors
  • Power source: Long electric cord provides power to the eVTOL aircraft
  • Fuselage: Carbon fiber composite
  • Windows: Large windows providing better views for the passengers
  • Skylights: Skylights form a cross pattern over the entire top of the fuselage opening up an illusion of space, nice views and the sun to shine inside for the upper level passenger compartment
  • Landing gear: Retractable quadricycle wheeled landing gear
  • Safety Features: Distributed Electric Propulsion (DEP), provides safety through redundancy for its passengers and/or cargo. DEP means having multiple propellers and motors on the aircraft so if one propeller fails, the other working motors and propellers can safely land the aircraft.