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The family of millionaire businessman Zef Eisenberg have paid tribute to a “true genius” following his death during an attempt to break the British land speed record.
The Maximuscle founder, 47, was killed after the Porsche 911 Turbo S he was driving “went out of control at high speed” at Elvington Airfield near York on Thursday.
Mr Eisenberg, a father-of-two who lived in Guernsey, was pronounced dead at the scene.
He had previously been involved in a “near-death” 230mph crash at the same airfield in 2016, prompting concerns he would never walk again.
A released on his family’s behalf said: “Known for the enthusiasm that he applied to each of his projects, Eisenberg injected his positivity into everyone he came into contact with.
“They, in turn, were left feeling upbeat and in an enlightened mood.
“His family have described him as a ‘true genius with unique talents’.
“Eisenberg leaves behind a loving partner Mirella D’Antonio and two children.
“His parents and four siblings all adored him and followed his progress with great admiration.
“All have expressed their great sadness and ask for their privacy to be respected at this tragic time.”
Mr Eisenberg, a former teenage bodybuilder from north London, had made his fortune with the Maximuscle fitness brand of protein powder, eventually selling to pharma giant GlaxoSmithKline and moving to Guernsey.
An ultra-speed motorbike racer, in the past decade he amassed over 70 land speed records for motorbike and car.