Photo Credit: Fair Use [17 U.S.C. § 107] Formula‑4 (F4) is an international inshore powerboat racing class and a step toward qualification for F2 and F1 powerboat competition.
19 Jun 2025 | Abstracted from All At Sea
"Engineered to deliver high performance at 48 V, the propulsion system is designed as a retrofit for existing combustion outboard-powered F4 race boats."
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