Portsmouth Yardstick Numbers
(Updated May 11)
The PY numbers used for PSSA races are as follows:
|
PY |
Class |
Inboard/Outboard |
Propellor |
|
1150 |
Seal Sinbad |
Outboard |
|
|
1140 |
Seal 22 |
Outboard |
|
|
1095 |
Seal 28 |
Inboard |
Fixed 2 blade |
|
1080 |
Seal 850 |
Inboard |
Fixed 2 blade |
|
1063 |
Parker 21 |
Outboard |
|
|
1030 |
Parker 235 |
Outboard |
|
|
976 |
SuperSeal
26,
Parker27, 275, 285 |
Inboard |
folding |
|
950 |
Parker 31 |
Inboard |
folding |
|
940 |
Parker 325, 335 |
Inboard |
folding |
Allowance for different engine/propeller configurations:
|
From
|
To |
|
OB |
IBF |
IB2 |
IB3 |
|
Outboard engine |
OB |
0 |
+10 |
+20 |
+40 |
|
Inboard engine with folding propeller |
IBF |
-10 |
0 |
+10 |
+30 |
|
Inboard engine with fixed 2-blade propeller |
IB2 |
-20 |
-10 |
0 |
+20 |
|
Inboard engine with fixed 3-blade propeller |
IB3 |
-40 |
-30 |
-20 |
0 |
The following adjustments are applied to boats not conforming to the standard specifications:
- A boat with no spinnaker, cruising chute or gennaker +40
- A boat with cruising chute or gennaker but no spinnaker +20
- Allowance for using a keel fixed by design +10