Note: All Island Packet models are subject to specification changes (dimensions, capacities, ratings, equipment, etc.) during their production life. The specifications given here are representative and should be used for general comparison only.
General Information For The IP31
Island Packet 31
Since its introduction the Island Packet 31 has been recognized as a cruising classic thanks to the highly successful and acclaimed Island Packet design concept that combines a broad beamed, modern full keel hull with handsome traditional styling and a generous yet easily managed rig. The IP31 offers the cruising sailor the unique advantages of spirited performance with excellent control and seakeeping qualities along with spacious accommodations normally found only in much larger yachts.
- from the factory brochure
Documentation For The IP31
Brochure
Spec & Price List
Interior Plan
Specifications For The IP31
First Built
1983
LOA
34'-4''
Sail Area
648
Last Built
1989
LOD
30'-7''
Sail I
39'-9''
Number Built
262
LWL
27'-9''
Sail J
14'-9''
Displacement
11000
Beam
11'-6''
Sail P
34'-0''
Ballast
4500
Draft
4'
Sail E
14'-0''
Fuel Cap
25 US gal
Shoal Draft
3' / 7'
D/L Ratio
230
Water Cap
70 US gal
Mast Height
43'-6
SA/D Ratio
21.0
Holding Cap
14 US gal
Diesel HP
27
B/D Ratio
41%
Click here to compare these IP31 specifications with other Island Packet models.
Running Rigging For The IP31
Mainsail Rigging
Staysail Rigging
Other Rigging
Halyard
3/8''x105' XLS
Halyard
5/16''x60' spun dacron
Jib Halyard
3/8''x85' XLS
Sheet
7/16''x58' Trophy
Sheet
3/8''x60' spun dacron
Jib Sheet
7/16''x120' Trophy
Topping Tail
5/16''x27' XLS
Clew
- -
Boom Vang
7/16''x40' spun dacron
Topping Wire
1/8''x32' 7x7 wire
Topping Lift
1/4''x60' braid dacron
Reefing Lines
5/16'' spun dacron
Traveler Control
- -
Click here to compare IP31 running rigging with other Island Packet models.
Standing Rigging For The IP31
Wire Size
Loos Gauge
Scale Reading Below 50 F
Scale Reading 50 F to 80 F
Scale Reading Above 80 F
Upper Stays
1/4''
PT-2
32
34
35
Intermediate Stays
- -
- -
- -
- -
- -
Aft Lower Stays
1/4"
PT-2
32
34
35
Fwd Lower Stays
1/4''
PT-2
32
34
35
Check Stays
- -
- -
- -
- -
- -
Back Stays
3/16''
PT-2
19
21
22
IMPORTANT : These are MAXIMUM (not to exceed) rigging tensions as measured using the indicated Loos gauges
Check tensions after initial setup of the rigging and after any subsequent adjustments.
Gauge readings may vary from stay to stay of the same type but none should exceed the maximum scale readings listed.
Please visit the Loos website for more information about the PT-2 and PT-3 gauges.
If you are not familiar with the process for tuning your rig please contact a qualified rigger in your area.
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