one 25 employees A company from Niagara Falls just claimed they can build a fighter jet that can fly four times the speed of sound. The SM-39 Razor is the latest concept from Stavatti Aerospace, and it looks like a Batman vehicle redesigned by aerospace engineers inspired by science fiction novels. Its three-fuselage bat-wing silhouette and purported Mach 4+ Capability-wise, the underdog is designed to disrupt the Navy’s F/A-XX fighter competition, dominated by defense giants Boeing and Northrop Grumman.
Performance claims that violate physical principles
Starvati’s specs sound more like video game statistics than actual aircraft capabilities.
The claimed performance of the SM-39 Razor reads like a wish list written by someone who has never heard of thermodynamics. pair E1400 afterburning turbofan engine It is said that this is recommended 70 feet The beast reaches speeds exceeding Mach 4 while maintaining stealth characteristics. The company claims it can carry 25,000 pounds of weapons internally while achieving 100,000 feet ceiling and 1,400 nautical miles Tactical radius.
These are numbers that would make an SR-71 Blackbird jealous. If true, this thing could fly from New York to Miami faster than your Uber can arrive during rush hour traffic.
A reality check for the physics department
Turbofan engines are not designed for near hypersonic flight, and thermal physics doesn’t care about marketing claims.
This is where Starvati’s fever dream meets aerospace reality. Managing airflow at near hypersonic speeds creates thermal challenges that melt conventional materials and damage stealth coatings. Most hypersonic vehicles use scramjets or rockets rather than turbofans, and for good reason.
Stavatti’s track record doesn’t inspire confidence either – 30 years of concept and zero full-scale prototypes delivered. Compare this to Boeing’s decades of experience producing actual carrier-based aircraft and Northrop’s combat-proven stealth expertise.
Navy presses ahead despite doubts
The F/A-XX program secured funding while industry veterans questioned the feasibility of the timeline.
The Navy received up to $897 million in F/A-XX engineering and manufacturing development contracts in fiscal 2026, according to a defense report. The chief of naval operations is pushing to accelerate responses to threats from Iran and China. Boeing and Northrop Grumman remain the realistic frontrunners to replace the aging F/A-18E/F Super Hornet 2040s.
Whether Starvati’s submission was seriously considered remains unclear. But the Batwing design has captured the imagination of defense technology enthusiasts who appreciate bold engineering—even if the physics don’t quite make sense.
The SM-39 Razor represents everything people love about the underdog innovation story, wrapped in a “future war” design. Unfortunately, the laws of thermodynamics rarely apply to startups.
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