M30 Tuning Guide (updated June 12, 2007)

Base Settings:
Headstay Pin to Pin Measurement: 12140 mm
Rake: Swing Arc - Use Centerline halyard pulled down to top of black band - pull forward to mark headstay.
Mark on headstay down to headstay pin: 1820 mm
Cap Shroud Tension: #37-38 on
RT 10 Rod Loos Gauge
D1 Tension: #14-15 on
PT2 Wire Loos Gauge
D2 Tension: #7 on PT2 Wire Loos Gauge
J Dimension (see A on diagram below): 3315 mm
Mast Base - (Distance from forward
headstay bolt to front of mast, see B on diagram below):
3480 mm
Distance Mast Foot to Fore Bulkhead (see C on diagram below): 1140 mm
Pre-Bend: 70mm
Click here to download our M30 Quick Tune Card (pdf file, 59kb)
Sail Models:
Mainsail
Light Jib
Med Jib
Heavy Jib
LDMC-06
LJC-06
MJC-06
HJA-06
 
Masthead 30g
Masthead 40g
Fractional 40g
Masthead
A-Sail 30g
MHL-06
MHH-06
FS-06
MHA-06

Quick Adjustments (full turns from base settings)
True Wind Speed:
Sail Selection:
Headstay:
Cap Shrouds:
D1s:
D2s:
Really light (<5k)
LJC-06
-8
-1
-1
Base
Light (6-8k)
LJC-06
-4
-1
-1
Base
Medium (9-10k)
MJC-06
0
Base
Base
Base
Medium 11-12k)
MJC-06
+4
Base
Base
Base
Medium (13-15k)
MJC-06
+8
Base
Base
Base
Medium (16-18k)
MJC-06
+10
+1
+1
Base
Heavy (19-21k)
HJA-06
+12
+1
+1
Base

Heavy (>22k)

HJA-06
+15
+2
+2
Base

Click here to download our M30 Quick Tune Card (pdf file, 59kb)

Please refer to the Quick Reference Tuning Guide (above) for our most current and up to date information. Please use the complete tuning guide for reference and general set up only.

Luc Joëssel is the M30 Class Leader in the North Sails Class Development Program (CDP). He has years of cutting-edge sailmaking experience and can make your M30 faster and more fun! If you have any questions about the M30 or would like to find your local M30 expert, contact Luc today.