Welcome to Jetcopter !
Helicopters invented in 1920's , 100 years in use with no changes
It's time for new generation copter ?
* hybrid propulsion - take off by electric motors , cruise on diesel engine.
* 2 counter rotating centrifugal 300 cm diameter turbines powered by 4 electric motors (2 on each shaft for safety)
* rear diesel motor with pusher prop for efficient horizontal flight and recharging batteries after take off
Why helicopters inefficient :
* use all the time lifting power when it need it only for short time at take off and landing
* have no wings
* very complex controls and components
* waste 15-18% power for rear anti torque rotor
* almost not possible to add parachute
* dangerous rotor blades
* short lifespan of many components = very high costs per traveled mile
What is idea of JETCOPTER ?
USA patent , publication US-2019-0016453-A1
replacing main and tail rotor by double centrifugal air turbines
replacing cyclic control by airflow vectoring
4 points air vectoring from jet to jetcopter
* most compact size VTOL in the world
* much safer to passengers and to people nearby - have fully duct fans .
* more efficient in horizontal flights , have wings , pusher propeller
* more affordable compared with similar 5 seats helicopters
* feasible construction and effective production costs
practically proven Harrier jump jet 4 nozzles thrust vectoring system
eVTOL AIRCRAFT , WHY WE WILL WAIT FOR IT ANOTHER 20 YEARS ?
It's a long story to explain why some VTOL aircraft construction can be better than other . Presently it's boom of VTOL designs ,majority of them are just recalls from 1950's , second attempt to bring them to life . Today only very lazy not offered own VTOL aircraft design and there are reason - electric motors . Looks so simple - just add 4 rotors + motors around the cabin and S'il vous plaît - new aircraft . But reality is not so simple , in 2019 UBER ELEVATE summit engineers announced - today we still have no batteries working well for e-VTOL , motors have , but batteries - no .
JETCOPTER will be better VTOL aircraft
( it will take a time to add all info )
Aircraft for take off will be powered by electric motors ( 2 electric motors per rotor for redundancy and safety ) , after aircraft will take off in 10 m height , the pusher propeller powered by automotive piston motor will start to push aircraft forward . Electric motors will be used for short time - take off and landing 15 min + 15 min . In flight batteries will be charged by automotive motor .
JETCopter will have two counter rotating centrifugal fans , which then divert their airflow to four outflow points. Like other VTOLS, the amount of power given to each output point can be manipulated to control vertical hovering and maneuvering. Once the JETCopter is in the air, its fixed-wing tilts for horizontal flight, and from there it operates much like a jet.
The jump to jet power enables a more continuous and powerful airflow stream. This could make for more advanced maneuvering. It also eliminates the presence of a suctioning force at the extraneous points, which would be much safer in urban environments.
Jetcopter’s distributed power concept opens up a new class of flying cars. New VTOL designs may start featuring jet power points rather than rotor blades at every point and features such as higher ranges and speeds could add value to a higher end segment of the market; people who wish to travel further or faster.
CENTRIFUGAL AIR TURBINE vs AXIAL
Automotive piston motors + electric motors vs turboshaft
Power : 300 kW , weight - 135 kg ,
price -250 000$
TBO - 3000 h
4 cylinder piston : 312 kW , weight -160 kg ,
price - 12000$
TBO - 8000 h
electric motor : 260 kW , weight - 50 kg
Batteries weight for 30 min : kg
TBO - 20 000 h
Urban flights will require additional capabilities as VTOL aircrafts will operate close to pedestrians and buildings.
Why not multicopters ?
1st multicopter law : as smaller rotors are , as more powerful motors you will need .
2nd multicopter law : more rotors = more motors = more problems
3rd multicopter law : more rotors = more air drag
Average helicopter rotor is 12 m diameter , it's 113 m2 disc area !
Most of multicopters have up to 2m diameter rotors , which have 3 m2 or smaller disc area !
That is 37 times smaller than helicopter !
They must have 37 x rotors to get enough lifting power !
The smaller is rotor disc area - more power you will need for take off .
More power = more motors = more controllers = more batteries = more weight = short flying time .
Bell made it with 6 Airbus with 4
Bell Nexus Airbus airtaxi
Jetcopter made with 2 rotors
New technology urban VTOL aircraft with automotive hybrid motors , 1000 km flying distance
propulsion : 2 counter rotating 300-400 cm radial air turbines
motors : electric 4 x 250 KW
motors : hybrid 2 x 500 KW
capacity : 5 seats
flying distance with hybrid motors : 1000 km ( 620 miles )
flying distance with electric motors : --- km ( --- miles ) to be confirmed
speed with hybrid motors: > 300 km/h ( 186 mph )
speed with electric motors : --- km/h ( --- mph ) to be confirmed
MTOW : 2000 kg ( 4400 pounds )
safety : 2 parachutes
Why Jetcopter will be better urban VTOL ?
Why Jetcopter will be more efficient VTOL ?
JETcopter will be able to use air lifting power , helicopter not .
2 x 450 hp automotive with duplicated fuel ,
cooling , power supply systems .
Reliable and less mechanically complex
no swash plates , no cyclic , no hydraulics , no clutch .
Take off : helicopter mode or plane mode
fly as plane
will be able to land at auto parking ,
will be able to maneuver safe between cars
powered by reliable automotive motors ,
may not need helicopter pilot licence
much easier to pilot
Production costs ( compared with 6 place helicopter ) :
rotors - 70 % cheaper
carbon fiber fuselage - 50 % cheaper
motors - 90 % cheaper
predicted 60-70 % lower than helicopter
equipped with 2 parachute life saving system
fuselage all made from carbon fiber
Tilt wings with 4 vectoring nozzles