All posts by: Ed Dellis

F1’s Power Steering vs IndyCar’s Manual Steering

There’s an interesting take on IndyCar’s speed from across the Pond at the link below.   I’m honored that PersonaGrip was in both cockpits when those two record-setting runs were laid down at the legendary Brickyard…amazing cars and drivers during […]

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Free Track with Streaming Video

Ed’s Driver’s Ed In 1989, while working at SAE as Associate Editor for Automotive Engineering magazine, I accepted an invitation to speak in Washington DC about the “State of Driver’s Ed in this Country”…that was before the Internet. Many of […]

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Left- or Right-Foot Braking?

Left- or Right-Foot Braking — a Matter of Preference Driving stars discuss braking techniques in this SAFEisFAST video. If you’re a right-foot braker, I recommend practicing left-foot braking on the street for a few months before you take it to […]

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Steering Wheel Action – Street Course

In-Car Cameras — Good for Watching Hand Positioning Watch Tony’s struggle to hold the wheel out of the hairpin in the very last shot of this video…don’t skip ahead, this one’s worth every second. Ryan’s upper wing on his right […]

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Tire Sidewall Flex & Relaxation Periods

Relaxation Periods As a racecar goes from the different loads for a typical corner — acceleration, braking, cornering, acceleration — transition periods occur as the tire’s cords settle down into their tasks at hand.  As the tire transitions to-and-from the […]

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Ayrton Senna Footwork

Ayrton Senna at Play in an Acura NSX Ayrton probably didn’t have a lot of seat-time in this car when this was shot. So, the amount of lock needed to dance it around the corners wasn’t as ingrained as it […]

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Manual Transmission Operation Explained

Racing vs Street Transmissions — or Gearboxes Dog boxes used in car racing shift lightening fast, and are basically transmissions without synchronizers. As such, input/output shafts must have matching speeds before the shift can occur…otherwise they grind going in. Upshifts […]

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Load vs Traction – How the Whole Car is Affected

Ross Bentley does a great job of simplifying how load curves work in relation to cornering force. In fact, the load curve can be mixed with the slip-angle curve to get a 3D “carpet plot” of traction force available at […]

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F1 1978 Long Beach Grand Prix with Patrick Depailler

Jacques Villeneuve spoke about boredom in F1 in this BBC story: http://www.bbc.com/sport/0/formula1/26178312. Back in the ’90s, I worked quite closely with him in IndyCar. I found him to be one of the most talented, level-headed drivers on the circuit. He […]

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Racing Steering Wheel Grip Design Tips

As inventor of the PersonaGrip custom-molded racecar steering wheels, I discuss designing the top wing on a racing steering wheel in this video. Lessons learned from the world’s best drivers in IndyCar, Formula One, NASCAR, ALMS, et al. over the […]

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