at left, front & back)
Specimens A & B are replicas of the surface roughness of new or
reconditioned propeller blades to be used as a standard for comparison
with similar surface roughness taken from propellers eroded by periods
of service, since propeller efficiency deteriorates in time due to
the increasing surface roughness and also with the growth of marine
fouling. Specimens C, D, E, & F can be used to assess and
report upon the propeller blade surface condition after periods of
service. Propellers in service should be examined frequently
and any fouling removed as soon as it is noticed. After cleaning,
the surface condition should be checked using the comparator and the
roughness recorded. The propeller should be repolished if the
roughness exceeds the maximum allowable amount in the figure shown
for measuring the roughness of propellers
-- a must for any company offering propeller polishing services.
of a pocket-sized reference scale with 6 specimens resembling
various stage of propeller roughness, plus a waterproof table
for recording readings underwater by diver.
worldwide by the shipping industry for propeller inspection and
by ABS (American Bureau of Shipping), Lloyds of London, US Navy,
and other class societies worldwide, for the determination of the
condition and serviceability of ship's propeller.
ship worldwide by air and sea!
Armada Systems, Inc.
Pensacola, FL 32534 USA
Phone (850) 912-8962 Fax (850) 912-8965
E-mail us at firstname.lastname@example.org