Club
Certificate
2023

Boat

AIR FORCE

USA 108

US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
Rated boat velocities in knots
Wind Velocity6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Beat Angles43.8°41.4°39.4°38.8°39.0°39.2°40.5°
Beat VMG3.354.044.424.544.584.604.52
52°5.145.946.306.446.516.556.56
60°5.426.136.476.656.756.816.86
75°5.576.256.646.957.137.267.41
90°5.526.336.827.217.457.718.06
110°5.306.206.787.327.868.429.50
120°5.046.076.677.257.858.5510.28
135°4.525.596.326.847.388.0310.08
150°3.784.855.726.386.867.368.65
Run VMG3.284.204.965.656.216.667.61
Gybe Angles144.2°147.1°152.3°159.5°173.6°176.3°173.0°

APH: 601.3

CDL: 7.132

GPH: 672.3

CertNo: US7202

BOAT
ClassEXPRESS 27DesignerSCHUMACHERBuilderALSBERGAge date01/1986Series date01/1982Offset fileUS18887.OFFData fileUSA108
HULL
Length Overall8.309 mMaximum Beam2.463 mDraft1.337 mDisplacement1,136 kgDLR3.9279IMS DivisionSportboatDynamic Allowance0.000%Age Allowance0.487%
PROPELLER
InstallationNo PropellerTypeN/ADiameterN/A
CREW
Maximum weight382 kgMinimum weight286 kg * when appliedNon Manual PowerNoCrew Arm Extension0.00 m
SAIL AREAS (m²)
MeasuredRatedMainsail16.9317.37Headsail Luffed19.2619.26Headsail FlyingSymmetric38.8738.87Asymmetric37.1337.13 (1 asymmetric(s) with SHW/SFL < 85%)
STORM SAIL AREAS (m²)
Trysail4.82Storm Jib4.19Heavy Weather Jib11.30
SAIL LIMITS
Headsails5  Spinnakers4 * Asymmetric SHALL NOT be tacked on the pole
STABILITY
Righting MomentN/AStability IndexN/A
The owner and any other person in charge is responsible that boat is complying with her certificate in accordance with RRS 78.1 and ORC Rule 304.

Club
Certificate
2023

Boat

AIR FORCE

USA 108

US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
Time Allowances in secs/NM
Wind Velocity6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Beat VMG1075.2891.0814.5793.2785.8783.3796.2
52°700.1605.9571.5559.0552.8549.4549.0
60°664.7587.5556.5541.3533.2528.3524.4
75°646.3575.7542.5518.3504.8495.6485.8
90°652.2568.6528.0499.6483.4467.0446.5
110°679.1580.5531.2491.6457.9427.6379.1
120°714.8593.2539.7496.8458.5420.9350.1
135°797.0643.9569.7526.5487.6448.2357.1
150°951.6743.0629.9564.7524.9488.8416.2
Run VMG1098.9857.9726.1637.0580.2540.4473.2
Selected Courses
Windward / Leeward1087.0874.5770.3715.1683.0661.9634.7
All purpose831.3688.8621.5583.8559.8540.1509.0
Single Number Scoring Options
CourseTime On
Distance
Time On
Time
Windward / Leeward744.90.8055
All purpose601.30.9979
 
Custom scoring options for Australia
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low760.10.7894
Triple Number Coastal/Long Distance Medium599.11.0015
Triple Number Coastal/Long Distance High533.31.1250
Triple Number Windward/Leeward Low980.70.6118
Triple Number Windward/Leeward Medium738.70.8122
Triple Number Windward/Leeward High657.00.9133
Custom scoring options for Austria
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance654.00.9175
Triple Number Coastal/Long Distance Low760.10.7894
Triple Number Coastal/Long Distance Medium599.11.0015
Triple Number Coastal/Long Distance High533.31.1250
Triple Number Windward/Leeward Low980.70.6118
Triple Number Windward/Leeward Medium738.70.8122
Triple Number Windward/Leeward High657.00.9133
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1088.2824.2697.0623.9581.7543.9476.5
Custom scoring options for Brazil
Scoring OptionTime On
Time
Upwind "bolina"0.7072
Downwind "popa"0.8548
70% up, 30% down "Ilhabela"0.7458
30% up, 70% down "Ilhabela-inverso"0.8044
Custom scoring options for Bulgaria
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low760.10.7894
Triple Number Coastal/Long Distance Medium599.11.0015
Triple Number Coastal/Long Distance High533.31.1250
Triple Number Windward/Leeward Low980.70.6118
Triple Number Windward/Leeward Medium738.70.8122
Triple Number Windward/Leeward High657.00.9133
Predominantly Upwind651.90.9204
Predominantly Downwind609.80.9840
Custom scoring options for Canada
Scoring OptionTime On
Distance
Time On
Time
Triple Number All Purpose Low760.10.7894
Triple Number All Purpose Medium599.11.0015
Triple Number All Purpose High533.31.1250
Triple Number Windward/Leeward Low980.70.6118
Triple Number Windward/Leeward Medium738.70.8122
Triple Number Windward/Leeward High657.00.9133
Predominantly Upwind651.90.9204
Predominantly Downwind609.80.9840
Predominantly Upwind Low834.30.7191
Predominantly Upwind Medium674.30.8898
Predominantly Upwind High648.30.9256
Predominantly Downwind Low842.80.7119
Predominantly Downwind Medium608.60.9859
Predominantly Downwind High492.61.2180
Chicago-Mac Upwind0.9055
Chicago-Mac All Purpose0.9347
Chicago-Mac Downwind0.9662
Bayview-Mac Cove Island0.8786
Bayview-Mac Shore0.8877
Scoring OptionTime On
Distance
Time On
Time
Predominantly Reaching567.81.0567
Predominantly Reaching Low688.50.8714
Predominantly Reaching Medium565.11.0617
Predominantly Reaching High490.81.2224
5-Band
Windward/Leeward
Time On
Distance
Time On
Time
5-Band Low1070.70.5604
5-Band Low / Medium899.40.6671
5-Band Medium727.70.8245
5-Band Medium / High665.30.9018
5-Band High639.40.9384
Custom scoring options for Cyprus
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance654.00.9175
Triple Number Coastal/Long Distance Low760.10.7894
Triple Number Coastal/Long Distance Medium599.11.0015
Triple Number Coastal/Long Distance High533.31.1250
Triple Number Windward/Leeward Low980.70.6118
Triple Number Windward/Leeward Medium738.70.8122
Triple Number Windward/Leeward High657.00.9133
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1088.2824.2697.0623.9581.7543.9476.5
Custom scoring options for Denmark
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance654.00.9175
Triple Number Coastal/Long Distance Low760.10.7894
Triple Number Coastal/Long Distance Medium599.11.0015
Triple Number Coastal/Long Distance High533.31.1250
Triple Number Windward/Leeward Low980.70.6118
Triple Number Windward/Leeward Medium738.70.8122
Triple Number Windward/Leeward High657.00.9133
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1088.2824.2697.0623.9581.7543.9476.5
Custom scoring options for Spain
Scoring OptionTime On
Distance
Coastal/Long Distance654.0
Triple Number Coastal/Long Distance Low760.1
Triple Number Coastal/Long Distance Medium599.1
Triple Number Coastal/Long Distance High533.3
Triple Number Windward/Leeward Low980.7
Triple Number Windward/Leeward Medium738.7
Triple Number Windward/Leeward High657.0
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1088.2824.2697.0623.9581.7543.9476.5
Custom scoring options for Estonia
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance654.00.9175
Triple Number Coastal/Long Distance Low760.10.7894
Triple Number Coastal/Long Distance Medium599.11.0015
Triple Number Coastal/Long Distance High533.31.1250
Triple Number Windward/Leeward Low980.70.6118
Triple Number Windward/Leeward Medium738.70.8122
Triple Number Windward/Leeward High657.00.9133
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1088.2824.2697.0623.9581.7543.9476.5
Custom scoring options for Finland
Scoring OptionTime On
Distance
Time On
Time
FinRating (Coastal/Long Distance)654.00.9175
Triple Number Coastal/Long Distance Low760.10.7894
Triple Number Coastal/Long Distance Medium599.11.0015
Triple Number Coastal/Long Distance High533.31.1250
Triple Number Windward/Leeward Low980.70.6118
Triple Number Windward/Leeward Medium738.70.8122
Triple Number Windward/Leeward High657.00.9133
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1088.2824.2697.0623.9581.7543.9476.5
Custom scoring options for France
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low760.10.7894
Triple Number Coastal/Long Distance Medium599.11.0015
Triple Number Coastal/Long Distance High533.31.1250
Triple Number Windward/Leeward Low980.70.6118
Triple Number Windward/Leeward Medium738.70.8122
Triple Number Windward/Leeward High657.00.9133
Custom scoring options for Germany
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7894
Triple Number Coastal/Long Distance Medium1.0015
Triple Number Coastal/Long Distance High1.1250
Triple Number Windward/Leeward Low0.6118
Triple Number Windward/Leeward Medium0.8122
Triple Number Windward/Leeward High0.9133
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1088.2824.2697.0623.9581.7543.9476.5
Custom scoring options for Greece
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance654.00.9175
Triple Number Coastal/Long Distance Low760.10.7894
Triple Number Coastal/Long Distance Medium599.11.0015
Triple Number Coastal/Long Distance High533.31.1250
Triple Number Windward/Leeward Low980.70.6118
Triple Number Windward/Leeward Medium738.70.8122
Triple Number Windward/Leeward High657.00.9133
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1088.2824.2697.0623.9581.7543.9476.5
Custom scoring options for Hungary
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low760.10.7894
Triple Number Coastal/Long Distance Medium599.11.0015
Triple Number Coastal/Long Distance High533.31.1250
Triple Number Windward/Leeward Low980.70.6118
Triple Number Windward/Leeward Medium738.70.8122
Triple Number Windward/Leeward High657.00.9133
Custom scoring options for Israel
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance654.00.9175
Triple Number Coastal/Long Distance Low760.10.7894
Triple Number Coastal/Long Distance Medium599.11.0015
Triple Number Coastal/Long Distance High533.31.1250
Triple Number Windward/Leeward Low980.70.6118
Triple Number Windward/Leeward Medium738.70.8122
Triple Number Windward/Leeward High657.00.9133
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1088.2824.2697.0623.9581.7543.9476.5
Custom scoring options for Japan
Scoring OptionTime On
Distance
Time On
Time
Triple Number Windward/Leeward Low980.70.6118
Triple Number Windward/Leeward Medium738.70.8122
Triple Number Windward/Leeward High657.00.9133
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1088.2824.2697.0623.9581.7543.9476.5
Custom scoring options for Korea
Scoring OptionTime On
Distance
Triple Number Coastal/Long Distance Low760.1
Triple Number Coastal/Long Distance Medium599.1
Triple Number Coastal/Long Distance High533.3
Triple Number Windward/Leeward Low980.7
Triple Number Windward/Leeward Medium738.7
Triple Number Windward/Leeward High657.0
Predominantly Upwind651.9
Predominantly Downwind609.8
Predominantly Reaching581.7
Custom scoring options for Lithuania
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance654.00.9175
Triple Number Coastal/Long Distance Low760.10.7894
Triple Number Coastal/Long Distance Medium599.11.0015
Triple Number Coastal/Long Distance High533.31.1250
Triple Number Windward/Leeward Low980.70.6118
Triple Number Windward/Leeward Medium738.70.8122
Triple Number Windward/Leeward High657.00.9133
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1088.2824.2697.0623.9581.7543.9476.5
Custom scoring options for Netherlands
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7894
Triple Number Coastal/Long Distance Medium1.0015
Triple Number Coastal/Long Distance High1.1250
Triple Number Windward/Leeward Low0.6118
Triple Number Windward/Leeward Medium0.8122
Triple Number Windward/Leeward High0.9133
Coastal/Long Distance0.9175
Predominantly Upwind0.9204
Predominantly Downwind0.9840
Custom scoring options for Norway
Scoring OptionTime On
Time
Tretall Distanseseilas Lite vind0.7894
Tretall Distanseseilas Mellomvind1.0015
Tretall Distanseseilas Mye vind1.1250
Tretall Pølsebane Lite vind0.6118
Tretall Pølsebane Mellomvind0.8122
Tretall Pølsebane Mye vind0.9133
Distanseseilas ett tall (OSN 8-16kn)0.9175
Distanseseilas ett tall (APH 6-20kn)0.9979
Enkeltall Motvind0.9204
Enkeltall Medvind0.9840
Custom scoring options for Portugal
Scoring OptionTime On
Distance
Time On
Time
Triple Number Coastal/Long Distance Low760.10.7894
Triple Number Coastal/Long Distance Medium599.11.0015
Triple Number Coastal/Long Distance High533.31.1250
Triple Number Windward/Leeward Low980.70.6118
Triple Number Windward/Leeward Medium738.70.8122
Triple Number Windward/Leeward High657.00.9133
Coastal/Long Distance654.00.9175
Custom scoring options for Russia
Scoring OptionTime On
Distance
Time On
Time
Predominantly Upwind651.90.9204
Predominantly Downwind609.80.9840
Custom scoring options for South Africa
Scoring OptionTime On
Distance
Time On
Time
Cape Doctor Inshore642.80.9334
Cape Doctor Coastal518.31.1576
Triple Number Coastal/Long Distance Low760.10.7894
Triple Number Coastal/Long Distance Medium599.11.0015
Triple Number Coastal/Long Distance High533.31.1250
Triple Number Windward/Leeward Low980.70.6118
Triple Number Windward/Leeward Medium738.70.8122
Triple Number Windward/Leeward High657.00.9133
Custom scoring options for Slovenia
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7894
Triple Number Coastal/Long Distance Medium1.0015
Triple Number Coastal/Long Distance High1.1250
Triple Number Windward/Leeward Low0.6118
Triple Number Windward/Leeward Medium0.8122
Triple Number Windward/Leeward High0.9133
Custom scoring options for Switzerland
Scoring OptionTime On
Time
Triple Number Coastal/Long Distance Low0.7894
Triple Number Coastal/Long Distance Medium1.0015
Triple Number Coastal/Long Distance High1.1250
Triple Number Windward/Leeward Low0.6118
Triple Number Windward/Leeward Medium0.8122
Triple Number Windward/Leeward High0.9133
Custom scoring options for Sweden
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance654.00.9175
Triple Number Coastal/Long Distance Low760.10.7894
Triple Number Coastal/Long Distance Medium599.11.0015
Triple Number Coastal/Long Distance High533.31.1250
Triple Number Windward/Leeward Low980.70.6118
Triple Number Windward/Leeward Medium738.70.8122
Triple Number Windward/Leeward High657.00.9133
Predominantly Upwind651.90.9204
Predominantly Downwind609.80.9840
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1088.2824.2697.0623.9581.7543.9476.5
Custom scoring options for Ukraine
Scoring OptionTime On
Distance
Time On
Time
Coastal/Long Distance654.00.9175
Triple Number Coastal/Long Distance Low760.10.7894
Triple Number Coastal/Long Distance Medium599.11.0015
Triple Number Coastal/Long Distance High533.31.1250
Triple Number Windward/Leeward Low980.70.6118
Triple Number Windward/Leeward Medium738.70.8122
Triple Number Windward/Leeward High657.00.9133
Performance Curve6 kt 8 kt 10 kt 12 kt 14 kt 16 kt 20 kt
Coastal/Long Distance1088.2824.2697.0623.9581.7543.9476.5
Custom scoring options for United States of America
Scoring OptionTime On
Distance
Time On
Time
Triple Number All Purpose Low760.10.7894
Triple Number All Purpose Medium599.11.0015
Triple Number All Purpose High533.31.1250
Triple Number Windward/Leeward Low980.70.6118
Triple Number Windward/Leeward Medium738.70.8122
Triple Number Windward/Leeward High657.00.9133
Predominantly Upwind651.90.9204
Predominantly Downwind609.80.9840
Predominantly Upwind Low834.30.7191
Predominantly Upwind Medium674.30.8898
Predominantly Upwind High648.30.9256
Predominantly Downwind Low842.80.7119
Predominantly Downwind Medium608.60.9859
Predominantly Downwind High492.61.2180
Chicago-Mac Upwind0.9055
Chicago-Mac All Purpose0.9347
Chicago-Mac Downwind0.9662
Bayview-Mac Cove Island0.8786
Bayview-Mac Shore0.8877
Harvest Moon Regatta509.51.1776
Scoring OptionTime On
Distance
Time On
Time
San Francisco Bay Heavy639.50.9382
San Francisco Bay Medium728.70.8234
Predominantly Reaching567.81.0567
Predominantly Reaching Low688.50.8714
Predominantly Reaching Medium565.11.0617
Predominantly Reaching High490.81.2224
Windward/Leeward 60-40 Low981.20.6115
Windward/Leeward 60-40 Medium761.90.7875
Windward/Leeward 60-40 High701.80.8549
5-Band
Windward/Leeward
Time On
Distance
Time On
Time
5-Band Low1070.70.5604
5-Band Low / Medium899.40.6671
5-Band Medium727.70.8245
5-Band Medium / High665.30.9018
5-Band High639.40.9384

Club
Certificate
2023

Boat

AIR FORCE

USA 108

US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
Data in meters/kilograms (Metric)
HULL AND APPENDAGES (Lightship Trim)
ClassEXPRESS 27MeasurementHINPlan reviewHull constructionCoredCarbon RudderNoLight stanchionsNoTrim tabNo
LOA8.309Max. Beam2.463Draft1.337Displacement1,136Wetted area11.06IMS L7.176LSM06.613Acc. length8.004Sink (kg/mm) 8.27
VCGD0.002VCGM-0.033RM Rated (kg·m) 22.7Limit of positive stability(°) N/AStability IndexN/A
PROPELLER
Propeller TypeNo Propeller
Hydro generatorNo
PIPA0.0000
RIG
Forestay tensionAftInner stayNone FittedCarbon mastNoHeadsail furlerNoMainsail furlerNoArticulated bowspritNoNon-circular riggingNoFiber riggingNoRunners/Checkstays0Spreaders2Rotating mastNo
P8.684IG8.773ISP8.773MDT10.078MDL10.129MDT20.072MDL20.091TL1.379MW0.091GO0.203
E3.170J2.740BAS1.150FSD0.025SFJ0.336SPL3.097WPLTPS3.050BD0.110MWT43.60MCG3.216
Flying Headsail Foretriangles IdISPTPS
FLOTATION AND STABILITY
Calculation methodVCG entered directlyVCG entered0.002Flotation Date16/02/2022MeasurerComment
SFFP0.378FFMFF0.917LCFcl4.438SG1.0000
SAFP7.736FAMFA0.691LCFsh4.603HBI0.867
TANKS
INVENTORY
INVENTORY
Fixed Ballast Total0
Total deductible
Total deductible

Club
Certificate
2023

Boat

AIR FORCE

USA 108

US SAILING
1 ROGER WILLIAMS UNI WAY
BRISTOL, RI 02809
USA
MAINSAIL
IdMHBMUWMTWMHWMQWAreaMeas.DateComment24496550.120.701.272.142.7416.932019 mainsail
HEADSAIL
IdHHBHUWHTWHHWHQWHLPHLUBtnFlyingFTAreaMeas.DateComment13939230.051.022.083.144.259.15NoNo 19.26ULLMAN GENOA
SYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLAreaMeas.DateCommentnew8.688.688.685.395.3138.87
ASYMMETRIC SPINNAKER
IdSLUSLESLSHWSFLRatioAreaMeas.DateCommentA39.058.208.635.085.5192%37.13A09.098.558.823.955.2575%30.94