The US Military has not too long ago made a big funding within the improvement of an ultra-STOL (quick takeoff and touchdown) plane. Below improvement by Electra, the plane has a hybrid-electric powertrain, energy, and propulsion system. The design has a number of distinctive options and capabilities that promise clear benefits over different quick takeoff and touchdown plane.
Electra Receives $1.9 Million to Develop EL9 Extremely-STOL Design
On 1 July 2025, Electra acquired a $1.9 million Small Enterprise Innovation Analysis (SBIR) contract from the US Military to analysis and develop hybrid-electric powertrain, energy, and propulsion methods (HEPPS). This settlement permits Electra to develop and take a look at its EL9 ultra-short takeoff and touchdown (Extremely-STOL) plane design.
“This work offers the Military a transparent path ahead in understanding how hybrid-electric applied sciences can assist actual operational calls for whereas enabling fully new logistics capabilities,” stated Donn Yates, Vice President of Authorities Applications at Electra.
Plane Will Have Eight Electrical Motors Mounted on Wings
Electra is at the moment flight-testing its EL2 Prototype. It has eight hybrid electrical motors and propellers mounted beneath and simply ahead of its excessive wing. The EL2 can carry simply two individuals within the cockpit, whereas the bigger EL9 can carry 9 passengers.
The gross weight of the EL2 is 3,100 kilos. Electra plans for the EL9 to have the ability to carry greater than 1000 kilos over 1000 miles.
EL9 to Takeff in Much less Than 150 Toes
Maybe the EL9’s most spectacular characteristic will likely be its capability to carry out takeoffs and landings from airfields of lower than 150 toes, which is shorter than a soccer discipline.
“Electra’s hybrid-electric ultra-STOL plane redefines what is feasible for Military aviation with its capability to function from small, rugged websites, cut back gas demand, and improve flexibility for the commander,” stated Yates.
Blown-Wing Know-how the Key to Extremely-STOL Efficiency
A characteristic often known as “blown-wing” know-how will give the EL9 its Extremely-STOL efficiency. Blown-wing, or blown-lift, is an aerodynamic impact produced by accelerating air excessive of a wing. The electrical motors transfer the air a lot sooner excessive of the wing than air transferring beneath it. This characteristic produces raise at a lot slower plane speeds than customary designs. With this configuration, the plane doesn’t should depend on its ahead velocity alone to generate raise.
The electrical motors, smaller and lighter than different powerplant varieties, make the blown-wing impact possible. The concept of blown-wing know-how took place within the Sixties, but it surely required shafts or ducted fuel linked to turbine or piston engines to provide the airflow over the wing. These concepts had been sophisticated and costly, requiring in depth design modifications. These early ideas by no means made it previous the prototype or low-production levels.
Electra examined this idea in a wind tunnel on a scale mannequin 20 p.c the scale of the EL9. The corporate discovered that the blown wing raise was seven occasions as efficient as an unblown wing.
EL9 to Be Quieter Than Conventional Designs
One other benefit of the Electra Extremely-STOL design is that it will likely be very quiet. Electra not too long ago examined the EL2 and located that it produced about 55 decibels flying at 500 toes, whereas a traditional turbine-powered plane places out 75 decibels. A quieter plane may very well be priceless to the Military for quiet intelligence, surveillance, and reconnaissance (ISR) missions.
Electra Extremely-STOL Plane To Generate Electrical energy in Distant Areas
A novel characteristic of the Electra EL9 Extremely-STOL plane, which may very well be particularly essential for the Military, will likely be its capability to perform as an electrical energy energy supply when working from distant or undeveloped areas. The EL9 will function a generator, producing greater than 600 kilowatts of steady energy and much more than 1 megawatt for brief bursts. This onboard functionality will permit it to recharge mission-critical gear like communications methods and drones.
The US Military isn’t the one group within the Electra EL9 Extremely-STOL plane. Electra already has over 2,200 pre-orders for the EL9 from greater than 50 prospects worldwide. Prospects are contemplating a wide range of makes use of for it, comparable to medical evacuation (MEDEVAC) and casualty evacuation (CASEVAC).
Electra is planning for its first take a look at flights of the full-scale EL9 in 2027.
