“Alpha” — Flying Car

The presented solution is several dozen years old. One of the solutions, i.e. “Flattened Coleopter with Hidden Propellers” was presented in “Skrzydlata Polska” weekly in 1974. In 1980, it became a subject of a MSc thesis entitled “Flattened Canard Coleopter”, with the anticipated application as a flying car. In 2003 a valid patent was developed, PAT.202553 “Device Designed to Increase Aerodynamic Lift of the Flattened Ring Lifting Surface”. In 2017, a concept design of the “dual-function wing end” was created.


Please note: Below, you can see a concept design of a flying car. This is a plane which may enter a public road and go along it without any additional activities, without the pilot's or passenger's need to get off. The car is designed for two people. It was presented in two versions, i.e. with side-by-side and tandem seats. It is obvious, you can create a third version using the “unique” solutions from the two presented ones. The presentation was preceded by demonstrating the basic "unique" features, distinguishing this layout from the ones used today. The presented material is not a mere artistic vision. All items shown are a graphic presentation of solid models made in accordance with the basic rules of aircraft structure design.

“Flattened Coleopter with Hidden Propellers”

The aerodynamic design enables to create high lift force with small size. The appropriate selection of propellers and turning directions enables to improve the aerodynamic perfection thanks to partial reduction of the induced drag. The slipstream turning direction must be opposite to the induced vortex direction

“The Device Designed to Increase Aerodynamic Lift of the Flattened Ring Lifting Surface”

This design enables to change the direction of the propeller wing thrust efficiently. Useful for V/STOL aircraft designs.

Valid patent PAT.202553 “The Device Designed to Increase Aerodynamic Lift of the Flattened Ring Lifting Surface”. Number compliant with the Polish Patent Office.

“Dual-function Wing End” 

In a horizontal layout the end is a wing component, increasing its area and elongation. After turning downward, it is a component of the chassis and the running gear of the car.

The solution was submitted for patent protection in the Polish Patent Office.

for flying
take-off , landing, going along a road

„Alpha WT”-  Double version Tandem

Basic dimensions



Configurations for flying


“On the land” configuration 

   


„Alpha W0”-  Double version Side-by-side 

Basic dimensions


Configurations for flying


“On the land” configuration



„ALPHA WO-STOL” Double version Side-by-side    as  STOL aircraft – versions: “Classic” and “Miser”

Basic dimensions


Configuration for flying



Configuration for start and londing


„On the land” - configuration

Version I - "Classic"


Mechanization of front wing


Mechanization of back wing
Note: Driving "on the ground" is like for a typical car. The wheels of the rear undercarriage are powered.


Version II - "Miser"

Mechanization of back wing
Configuration while driving Configuration for start and landing


Mechanization of front wing
Comments:
- The "Miser" version moves on the roads (driving and maneuvering) only with the use of propellers.
All the elements ensuring the passive safety of passengers must be present on the "object".
The "Miser" must have a system disconnecting the propeller drive during a collision on the road.

The system should also work when any object appears in the immediate vicinity of the propellers.
- In relation to other "flying-cars", "Miser" stands out: very high structural rigidity, low weight, simplicity of construction and mechanisms

Design solution submitted to the Patent Office of the Republic of Poland (application No. P.436864 "Device increasing the safety of working propellers" - February 2, 2021)



Aerodynamic tests

The version adopted for implementation: „ALPHA WO-STOL” Double version Side-by-side – as  STOL aircraft. The aerodynamic test model was made on a scale of 1: 4. The pictures below show the whole model. The model does not contain moving parts.
Wingspan – 620 mm; Length -1133 ; Weight – 17.27 kg

The scope of aerodynamic tests
To perform the analysis of aerodynamic parameters, tests in a wind tunnel should be carried out in 5 stages:

Stage 1 Aerodynamic tests of the main airfoil. 
The pictures below show the  model of the main airfoil.
Wingspan – 620 mm;  Length  – 625 mm;  Weight – 7.05 kg

Stage 2 Aerodynamic testing of main airfoil with propellers interaction.
The illustration below shows the basic parameters of the propellers  interaction. The tests should be carried out as in stage 1 taking into account the working propellers.

Stage 3 Aerodynamic tests  of the model without a front airfoil
The pictures below show the model without a front airfoil. 

Wingspan - 620 mm; Length – 1133 mm; Weight – 16.24 kg

Stage 4 Aerodynamic tests  of the model without a front airfoil with propellers interaction.
The tests should be carried out as in stage 3, taking into account the working propellers, and the results of the tests from stage 2

Stage 5 Aerodynamic tests of the complete model with the interaction of propellers.
The results of the first four stages  should be used to verify the geometry of the front airfoil. After introducing changes to the front airfoil geometry, aerodynamic tests should be repeated.

Note: The author will be happy to share the presented model with people or companies who have the resources and have the opportunity to carry out the research. The author has the documentation of the geometry of the presented system.

Visualization of the flow

Attempts were made to visualize the flow around the airfoil model

Experiment 1.

Speed                   V=25 m/s
Angle of attack  α=0O
Visualization of the flow CLICK HERE


Experiment 2.

Speed                   V=25 m/s
Angle of attack  α=10O
Visualization of the flow CLICK HERE