The Future of Advanced Air Mobility

PteroDynamics’ Parus Transwing family of all-electric VTOL aircraft are being developed for a variety of applications, primarily including cargo carrying and military operations. The design combines folding fixed wings and rotors to allow the aircraft to transition between vertical and cruise flight.

The aircraft flies with wings fully extended during cruise, but for takeoff and landing its wings can be folded back into a v-shaped multirotor configuration. This foldable design also means that Transwing aircraft will have longer than average wings, for an eVTOL design, resulting in lift-to-drag ratios greater than 20.

According to the company, when the wings are folded, Transwing aircraft will be barely a third of the width of other VTOL models. This is intended to allow them to also be driven on roads.

PteroDynamics was awarded its first patent on the Transwing aircraft design in April 2019, covering 25 apparatus and five method claims. The company subsequently filed a continuation application for an additional 20 claims, for which it received a Notice of Allowance in July 2019. In August 2020, the company was granted a notice of allowance for a third patent. 

The company says it can design Transwing aircraft that range in weight from less than 5 pounds to over 75,000 pounds and can be configured using all-electric, hybrid electric with turboshaft engines or even all conventional wet fuel engines. Its Parus 4 and Parus 12 aircraft are at the working prototype stage.

On September 19, 2020, Pterodynamics posted video showing a test flight of the Parus 12, showing its wingspan of just over 12 feet. The company reported that this design is protected by two U.S. patents (with a third pending) and that it has other patents pending in the European Union, China, Japan, and Hong Kong.

Its most recent U.S patent was issued in April 2021. According to the company, it has patents pending in four international jurisdictions under the Patent Cooperation Treaty.

In late July 2021, PteroDynamics leased a 9,200-square-foot facility in Colorado Springs to house the research, development, and production of its Transwing eVTOL aircraft program.


patent granted

Further U.S. patents for Transwing aircraft design

patent granted

U.S. patent granted covering 25 apparatus and 5 method claims for the Transwing design.


Our objective assessment of this program’s probable success.

FutureFlight assesses the probability of success for a new aircraft program by considering the following criteria:

  • Total investment funds available in proportion to the anticipated cost of getting an aircraft certified and in service
  • A company’s in-house capability (in terms of numbers of engineers, technical staff, and customer support teams)
  • The past experience of the company and its senior leadership in developing aircraft
  • The caliber and past experience of key program partners
  • Whether key aircraft systems have been selected and are available for use
  • Whether the preliminary design review has been completed
  • Whether the design for the full-scale prototype has been completed
  • Whether the type certification process has been formally initiated with an appropriate regulator
  • Whether the company has achieved a first flight with a full-scale prototype
  • The number of hours logged in a flight test program
  • Whether type certification has been achieved
  • The number of orders and commitment received for the aircraft
  • Whether the company has adequate facilities to begin series production of the aircraft
Our Methodology

PteroDynamics is building an ambitious, but somewhat vaguely designed program that promises to be all things to all people. Its CEO appears to have a strong track record with technology startups. The California-based company is still seeking funding to advance the development of the Transwing family of aircraft. As of April 2021, the company had been granted three U.S. patents.

However, as of mid-2021, Pterodynamics had not provided any substantive update on progress with its development work and it remained unclear whether it has adequate financial backing to bring any of its aircraft concepts to market. Based on YouTube video footage posted in early February 2021, the company still appeared to be flight testing sub-scale models of its planned eVTOL design.

Transwing Models

Parus6c Specifications

autonomous vtol Lift + Cruise


  • Passenger Capacity
  • Range
    70 mi
  • Cruise Speed
    70 mph
  • Powerplant Type
    multi rotor
  • Power Source
  • Endurance
    60 min
  • Max Altitude
  • Takeoff Distance
  • Landing Distance
  • Empty Weight
  • Payload Weight
    5 lb


  • Length
  • Width
  • Height
  • Wingspan

The Transwing Parus6c all-electric VTOL aircraft is a hybrid fixed-wing/rotorcraft design. Featuring PteroDynamic’s patented foldable wings, the VTOL can transition between rotor-wing and fixed-wing configurations in flight. Currently in the design stage, the Parus6c is intended to carry a 5 pound payload. 

Key Personnel

Matthew Graczyk
Matthew Graczyk


Val Pterov
Val Pterov

Chief Technology Officer (CTO)