Upon the date 08:58 PM 4/5/99 -0400, Max Eskin said something like: ABS prevents the wheels from locking up like in a car and in so doing maintains a somewhat straight trajectory. A bit of steering is probably needed to correct for cross winds or such. Of course, Allison or other airplane pilots here would add to this. This can be shown in an automobile. I have done it several times simply to "warm up" or get used to the ABS action at the beginning of winter. I go to the company parking lot on an evening or weekend of the first snow, accelerate, nail the brakes and feel and observe what happens. I can do this and release my hands from the steering wheel and the car comes to a stop in a generally straight line. Without ABS on my older cars when I did these "skid pad" warm ups, the car would get squirrelly and I could never let go of the wheel. That improved stopping control actually is the essence of the use of ABS. Regards, Chris -- -- Christian Fandt, Electronic/Electrical Historian Jamestown, NY USA cfandt(a)netsync.net Member of Antique Wireless Association URL: http://www.ggw.org/awa