Sun Flyer

Established in February 2014, the Sun Flyer program was created by Bye Aerospace to produce the two seat “Sun Flyer”, and for it to be fully certified under the new FAR 23, and bring it to market. We intend to serve general aviation by providing a clean, renewable energy, electric training aircraft. As of March 2018, we have 105 deposits for the Sun Flyer 2 and 16 deposits for the larger Sun Flyer 4. Check out the video of the Sun Flyer 2 prototype in flight below.

Electric Training Aircraft

This two-seat aircraft will change the way pilots train. The cost-efficient aircraft will enable new pilots to train without prohibitive fuel costs.

A Few Words From George Bye

Check out this exciting speech from CEO, George Bye at the Sun Flyer Roll out Event on May 11, 2016:


The Solar-Electric UAV is a highly cost effective and efficient aircraft platform with reasonable payload and extreme endurance focused on medium and high altitude missions. A proof-of-concept 15 meter wing span aircraft is nearing completion. Commercial aerospace and defense customer discussions are taking place.

The Materials

Similar to our other advanced aircraft programs, StratoAirNet utilizes light-weight composite structure, clean aerodynamics, and solar electric propulsion systems.


The StratoAirNet proof-of-concept aircraft is pilot-optional allowing for immediate payload integration while the flight test program matures.


Bye Aerospace provides design, research and engineering support for the Silent Falcon UAV being developed by Silent Falcon UAS Technologies. The Silent Falcon is a solar electric UAV utilizing stored electric power, thin film solar photovoltaic (PV), high efficiency 6 blade propulsion system and other technologies to enhance its very long endurance, quiet operations and zero emissions. An efficient electric motor provides the Silent Falcon with appropriate climb rates and efficient cruise which facilitates access to areas requiring surveillance. The easily transportable Silent Falcon system is very quiet with low thermal signature to reduce detection. The Silent Falcon carries a proprietary sensor gimbal, ``Falcon Vision,`` with electro-optical and infrared camera on a lightweight mechanically and digitally stabilized gimbaled payload allowing the operator to keep eyes on target. With very long endurance the Silent Falcon provides multi-fold the value and capability of competitive systems. Silent Falcon began initial customer deliveries in 2015. The combination of remarkable persistence, payload and reduced acquisition and operating cost over similar-sized systems gives the Silent Falcon a significant advantage over competitors.


Potential applications include homeland security, and military visual and thermal tactical reconnaissance. Potential civil applications include high security facility surveillance, pipeline and power line inspection, aerial law enforcement, forest fire detection, weather monitoring and aerial photography (see or for system purchase inquires


Li-Ion batteries, thin film photo-voltaics, advanced efficient propulsion system - GPS, electric autopilot and servo-control - Proprietary ISR sensor gimbal with daylight and low light video optics - Gross weight in the 30 lbs weight class with with cruise up to 45 knots - Flight Endurance 5 to 7 hours


U.S. Navy awarded a research contract to Global Near Space Services (``GNSS``) to develop a two stage lighter than air (``LTA``) unmanned air vehicle (``UAV``). The GNSS program developed a clean, cost-effective satellite-type capability utilizing a high altitude upper-stage shaped LTA coupled with an unpiloted detachable, flying, lower stage UAV containing sensor systems. GNSS subcontracted to Bye Aerospace to design the solar-electric flyable lower stage, 'stratospheric recovery vehicle' or SRV detachable UAV.

The unique GNSS "StarLight" LTA system is predicted to persist on station against prevailing winds at very high altitudes for 4 months for a fraction of the cost of a satellite. Solar electric energy provides the necessary power for all systems including both motors for station keeping and customer surveillance payloads. The lower stage solar electric UAV features deployable thin film photo voltaic arrays that articulate up to +/- 50 degrees to optimize solar energy collection. The electric motor propeller system also articulates up to +/-30 degrees to provide enhanced steering for the LTA against altering wind conditions at altitude. The lower stage detaches on command and returns under powered flight to landing and for refurbishment and re-launch as required.

Bye Aerospace helped design and construct a 40% demonstration scale SRV (pictured) for GNSS and the U.S. Navy. The scaled SRV demonstrator vehicle is designed with advanced all-composite structure, has a length is 27.8 feet with a wing span of 25.6 feet, and gross weight of 854 lbs. It is designed to 5g strength and a 1.4 safety factor. The SRV test vehicle utilizes a partial array of thin film photo voltaics to provide solar energy collection. Light-weight Li-Ion batteries provide energy storage. The SRV demonstrator is designed to fly with a limited redundancy autopilot, initially to altitudes under 15,000 feet, and eventually to near operational altitudes of up to 65,000 feet. Test payload for the demonstrator up to 50 lb and 100 Watts of power. APPLICATIONS Potential government applications include homeland security and related air sovereignty support. Potential civil roles include surveillance, communications and air traffic management.