Interesting. I see the T-45 has nose-wheel steering - I.E. it is not
steered by differential wheel braking. An ABS system for wee Lancairs
would require main wheel independence. Take off rolls frequently required
tapping the right brake to stay on the centerline until the rudder has
authority - all of that caused by the left turning tendencies induced by
the prop and resulting airflow.
I like the logic that the T-45 ABS system waited until the wheels were spun
up on landing. Do the wheels spin up properly on patchy
ice?
Grayhawk
PS: I only have one brake pedal in my car for all 4 wheels, 2 pedals
in the plane. Hmmmmm, the BMW and Honda touring motorcycles offer ABS
braking, independent for front and rear wheels as there are separate controls
for each.
In a message dated 9/24/2013 6:40:32 A.M. Central Daylight Time,
cwfmd@yahoo.com writes:
USN T-45
has awesome anti skid
IPs would demo holding brakes on touchdown during "no
flare" navy style landing
System was smart enough to allow wheels to spool
up to ground speed and then apply max braking. I have heard the system
compensates at millisecond response time so it is a far better feedback system
than human perception based on yaw and Gx sensing. Human perception loop is at
least 300 msec and probably much longer.
I suggest the steering and icing
concerns have already been addressed in standard automotive systems. This
reasoning also explains why an interface to a fast inertial sensor is
required, as in AHRS (40 packet bursts/second on grtAvionics.com)
Sent
from my iPad
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