Prop Scan
EPS - (Enhanced Propeller Standard) is used in the
correction and modification
of propellers and has been developed by experts in
the field to further enhance the well respected ISO
484 Standard.
Prop
Scan EPS can measure propellers down to a 2" diameter.
In
addition to local pitch measurements, Prop Scan EPS
measures the complete pressure face and presents
a tolerance band to control the face contour.
Prop
Scan EPS adds an additional accuracy class (displayed
in light blue).
Class
Description
Prop
Scan EPS
Class
O
Extremely
High Accuracy
ISO
484 Classes
S
Very
High Accuracy
I
High
Accuracy
II
Medium
Accuracy
III
Wide
Tolerances
ISO and Enhanced Tolerances on Pitch
Class
0
S
I
II
III
a)
Local
Pitch
Pitch
of one portion of one blade
± .75%
± 1.5%
± 2%
± 3%
-
b)
Section
Pitch
Mean
pitch of one radii of one blade
± .5%
± 1%
± 1.5%
± 2%
± 5%
c)
Blade
Pitch
Mean
pitch of one blade
± .38%
± 0.75%
± 1%
± 1.5%
± 4%
d)
Propeller
Pitch
Mean
pitch of all blades
± .25%
± 0.5%
± 0.75%
± 1%
± 3%
Prop
Scan EPS Features
A
propeller is measured each degree of rotation on the
pressure face resulting in the total section Face Camber
being scanned. The following table displays the Prop
Scan EPS Face Camber advantages.
Prop
Scan EPS compared to ISO 484/2
EPS
Face Camber
ISO
484/2 Face Scan
Class
Measurements
Local
Pitch
Measurements
Local
Pitch
0
57
4
NiL
NiL
S
57
4
5
4
1
57
3
4
3
2
57
2
3
2
3
57
2
2
-
The
average propeller is approximately 57 degrees
from leading to trailing edge
Prop
Scan EPS takes 57 precise ‘looks’ (recorded
measurements) at each measured section of a propeller
for all ISO 484/2 Classes. These are in addition to the
regulation ISO 484/2 Local Pitch measurements.
The ‘uncharted’ areas
between the measurement points (5 for ISO 484/2 Class
S) are now ‘looked at’, enabling problems in
these areas to be corrected. This precision is in excess
of the precision required for Navy propellers. Prop Scan
EPS was developed for Navy repair contracts.
