US firm Otto Aerospace is claiming business aviation specialist Flexjet as a launch customer for its proposed Phantom 3500 ultra-efficient executive jet, with an agreement for 300.

Otto Aerospace says the order is “firm” and also includes “additional options”.

The Phantom 3500 is under development by the Fort Worth-based company, with a maiden flight intended in 2027, and initial deliveries following in 2030.

Flexjet chair Kenn Ricci says the company focuses on “innovation opposed to imitation”, and that the Phantom “exemplifies that approach perfectly”.

The proposed aircraft features an ultra-low-drag profile, benefiting from laminar flow, to achieve long range – up to 3,200nm with four passengers – with less fuel and smaller engines.

Its construction will include a composite airframe and a simple wing design, and Otto is aiming for a 60% cut in fuel burn.

Phantom 3500-c-Otto Aviation

Source: Otto Aerospace

Otto expects the ultra-low-drag Phantom 3500 to enter service in 2030

Ricci says the Phantom is a “bold step” which will allow sustainability and efficiency to become “defining standards” in the market, along with speed, comfort and range.

“This collaboration with Otto Aerospace further affirms our leadership role in delivering to fractional aircraft owners the future of luxury private aviation,” he adds.

Flexjet’s agreement also gives its in-house maintenance organisation the ability to become an Otto authorised service centre.

The Flexjet fleet comprises several models across various sizes, such as the Gulfstream G700, Bombardier Challenger 300 and the Embraer Praetor and Phenom.

Flexjet will integrate the Phantom 3500 into its portfolio, to provide a “more sustainable, long-range travel experience”, says Otto.

Otto chief executive Paul Touw says the agreement with Flexjet “speaks volumes about where aviation is headed”.

“This marks a turning point in the industry’s move toward sustainable and efficient air travel,” he states.

Otto disclosed the agreement with Flexjet during the UP Summit, a gathering of innovation specialists, which took place at Bentonville municipal airport in Arkansas.