Tony Posted May 21, 2006 Report Share Posted May 21, 2006 As we know the activation of the Ackerman is dependent of the rotational axis from the steering pivotal points, namely the track rod end or the stub-axle.. In conventional terms the TOOT (Toe Out On Turns) is designed to be negative.....See picture. In truth even this image is incorrect since the inner wheel ( curve ) should coincide exactly at the rear centre.... but this is the best example i could find.... Anyway.. The image does show the principle of toot, displaying the extended reach from the inner wheel permitting a graduated axle rotation (negative)... This negative rotation normally exceeds the outer wheel by 1 degree 30' taken at 20 degrees. This is accentuated as the turn continues, up to about 2 degrees 45', after that the inner toot would (lock) control and become detrimental. Interestingly the idea of positive toot has been theorised for racing.. This principle rests on weight transfer and the polar centre reacting on the outer wheel accelerating turn in reply in a positive direction.... Very interesting and a reasonable concept subject to development... Obviously this positive arrangement could only work if the steering rack is in front of the wheels, but the final engineering concept is viable.... wim will keep you apprised. Quote Link to comment Share on other sites More sharing options...
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