Don Terrill’s Speed-Talk

Funny, but not so funny. That magazine still owes me $650 for an article. I misplaced the check and didn't find it until years later. I think the magazine had been sold 2 or 3 times in the interval. The article was in the June 2007 issue, if you collect them. Moral: I should cash checks immediately.

Appreciate the information. No magic here. All they have to do is get that instant center on the elevated 100% antisquat line. The easiest way is parallel links, but there are probably many other ways.

As you probably know, some engineers at Chevrolet worked with d'Alembert's Principle at the proving grounds. (This was for a very short time, as they were going to the static hydraulic loading as used now.) They simulated cornering loads by tethering a car to the side of a bus or other heavy vehicle...

Sorry, Brian. It's been many years since I worked in Detroit and I couldn't care less about what they're doing to limit squat with a De Dion or IRS. Apparently, they also couldn't care less.

All very interesting, Brian, but not to the point, which is that racers are needlessly complicating their cars. With a single ladder, offset to the right, equal rear tire loading on launch...and all the way down the strip...is easily accomplished.

The C-Type used the asymmetric rear suspension to obtain equal rear tire loading on acceleration. As is often the case, I don't believe the engineer in charge was fully cognizant of the results. I have read that he did not realize that the braking would be affected and that, upon this being pointed ...

My correct URL is now shopeshop.org

First, note that my correction was addressed to your comments regarding the IRS. With that in mind, I was merely pointing out that you were incorrect. I have helped dragracers with their problems with an IRS. They have accomplished the rise they desired with parallel links. And that, after all, is a...

I believe the best 3link was that originally designed for the Ramcharger High And Mighty C/A. Unfortunately, the timing was such that the design was never really utilized. The idea was a 4link configuration with the upper driver side link telescoping so that it was carrying a braking load only. The ...

This is just something to consider: After Ford and Chevrolet built millions of cars with a single ladder bar (better known as a "torque tube drive"), why do the builders of ladder bar cars use two ladders? Yes, I'm aware that Ford used a Panhard and Chevrolet used leaf springs to prevent r...

A traditional "live" axle can be set up to have a lot of anti-squat on acceleration. Neither IRS nor de Dion can do this, because the differential torque reaction goes right into the chassis without going through the suspension links, so there's no advantage to de Dion in that respect, ei...

The fellow that owns the site has evidently gone out of business. I can't get a response by email and I don't have his phone number. His name is Tim Duffy. Maybe you'll run into him (not literally) at the strip.

What im getting at is there a point of overkill where as the hit gets outof controll? Or the effect becomes negative? You're confusing hit with simple weight transfer. The weight transfer involves only the CG height, wheelbase, forward acceleration, and, of course, the car weight. The hit involves ...

Hi Billy thanks for the reply, So by tying down the right front we are slowing the weight transfer to the left rear and quickening it to the right rear? Is that the intention of this? Al. Don't understand "tying down," "slowing," and "quickening," but I think you've go...

Hi Billy, That is a very interesting site you have there. Do you have any information or links to information regarding leaf springs and how a caltrac type of device effects the instant centre? I have read varying opinions on wether or not the IC changes with such a device fitted. I expect the info...