Primeiro protótipo do jato Stratos 716 toma forma

Stratos 716
A Stratos Aircraft realizou testes de cargas nas asas, empenagens, fuselagem e trens de pouso no seu VLJ (Very Light Jet) 716, e está em sua etapa de montagem, com planos de iniciar os testes em solo no segundo trimestre e os ensaios em vôo no segundo semestre de 2020. Os planos para o futuro envolvem vender a aeronave como um kit para poucos compradores que ofereçam retornos que auxiliem o aperfeiçoamento do projeto antes do início sua campanha de certificação pela FAR 23. A companhia também está ampliando suas instalações em Redmond, Oregon (EUA), para aumentar sua capacidade produtiva no futuro.

Stratos Aircraft has completed load testing on its 716 very light jet (VLJ) and is now assembling the first prototype of the single-engined six-seater, which it hopes to fly in the second half of the year.

“We are making good progress,” says Stratos chief technology officer Carsten Sundin. “99% of the parts for the test aircraft are now built and fuselage and wing mating is now under way at our base in Redmond [Oregon].”

Stratos hopes to begin ground tests second in the second quarter.

The 716 was launched in July 2018 as a longer and wider version of the 714, which it replaces. Stratos has continued flying the proof-of-concept 714 to gather feedback for the current model, and has logged over 330h on the article to date.

Sundin says the company is “taking its time” with the 716, so it can create an aircraft that is “problem free” from the start.

Initiatives include switching to lightweight materials and parts to boost payload and range, and developing a method to co-cure the VLJ’s pressure vessel, creating a single component that requires no secondary bonding. Sundin says the joining method has the advantage of “eliminating most critical joints, and making the structure stronger, safer and more resilient”.

Stratos completed a comprehensive load testing programme late last year covering the 716’s fuselage, horizontal and vertical fins, landing gear and wing.

“We will begin high-speed taxi testing in the next quarter and when the aircraft is absolutely ready it will make its first flight, but this scheduling depends on how smooth the preparation goes,” says Sundin.

Once flight testing is under way, Stratos will open the 716 orderbook.

The first examples will be produced as kit aircraft and branded as the 716X.

This approach, Sundin says, will allow the company to “refine” the product before it embarks on the US Federal Aviation Administration FAR Part 23 type certification campaign.

“We don’t have a specific number of 716Xs in mind,” says Sundin, “but it will be a small volume, and we will work with the owners to gather feedback on the aircraft’s performance.”

Stratos hopes this approach will lower the development costs for the 716 and help attract investors who will assist in bringing this certificated version to market.

Stratos has sufficient funds to support 716X development, and to continue to make “incremental improvements” to the 716 design, Sundin says, “but the capital required for the Part 23 version will be greater by an order of magnitude,” he cautions.

All options are on the table for “investment scenarios”, Sundin continues, “provided they are adequate to bringing the 716 to market and to build the company and product line for years to come”.

While structurally both aircraft are identical, the 716X is powered by the same 2,900lb (12.9kN)-thrust Pratt & Whitney Canada JT15D-5 engine as the 714 and features a Garmin G3X flightdeck. The certificated variant will be powered by a 3,400lb-thrust PW535E, and feature either G3000 or G5000 avionics.

The company is also expanding its manufacturing capability in Redmond, which currently houses only a small amount of tooling. “We are going to build a full manufacturing facility which will allow us to increase aircraft volume as demand increases,” says Sundin. A “realistic production forecast” is for between 30 and 50 716s per year, he adds.

Fonte: Flight Global (20/01/2020)


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