Given 1978 O’Day 25’ Sailboat 1978 O’Day 25’ Sailboat.

GivenGiven

• 1978 O’Day 25’ Sailboat1978 O’Day 25’ Sailboat

Design CriteriaDesign Criteria

• Originally equipped with 15 hp gas engineOriginally equipped with 15 hp gas engine• Required to convert to electrical motorRequired to convert to electrical motor• Design constraint:Design constraint:• Engine is over poweredEngine is over powered• Charging system must be enough to Charging system must be enough to

recharge batteries for operationrecharge batteries for operation• Motor must be able to push the craft from Motor must be able to push the craft from

dock to position to saildock to position to sail• Must operate at 3 knots for approximately Must operate at 3 knots for approximately

30 minutes30 minutes

Design CriteriaDesign Criteria

• Use Wind Generators, Solar Panels, Tow Use Wind Generators, Solar Panels, Tow Generator or freewheeling to generate power Generator or freewheeling to generate power for the batteryfor the battery

• Electricity must support all electrical systems Electricity must support all electrical systems required at night and during normal sailing required at night and during normal sailing operation (refrigerator, radio, lights, etc)operation (refrigerator, radio, lights, etc)

• Equipment may be replaced to optimize Equipment may be replaced to optimize efficiencyefficiency

• 1978 sail boat optimized for today's products1978 sail boat optimized for today's products

Areas of our companyAreas of our company

• General MechanicalGeneral Mechanical

• General layout of the systemGeneral layout of the system

• Hull and PropulsionHull and Propulsion

• Resistance of hull and requirements to Resistance of hull and requirements to take boat throughtake boat through

• ElectricalElectrical

• Charging components, batteries, proper Charging components, batteries, proper charging procedurescharging procedures

Determining Forces on HullDetermining Forces on Hull

• Deciding what is requiredDeciding what is required

• Drag on the hullDrag on the hull

• Force due to accelerationForce due to acceleration

• Force due to waves in the waterForce due to waves in the water

• FYI-3 knots is 5.06 ft/sec, we FYI-3 knots is 5.06 ft/sec, we rounded to 5 ft/secrounded to 5 ft/sec


• Required parametersRequired parameters• V is velocity in ft/secV is velocity in ft/sec• ρρ is the density of water slug/ft^3 is the density of water slug/ft^3• L is the length of the hull ftL is the length of the hull ft• µ is the dynamic viscosity of water lb*sec/ft^2µ is the dynamic viscosity of water lb*sec/ft^2• Draft=4.5 ftDraft=4.5 ft• Beam=8 ftBeam=8 ft• Mass=Displacement/32.2 SlugsMass=Displacement/32.2 Slugs• AccelerationAcceleration• Decided to keep a constant acceleration at low Decided to keep a constant acceleration at low

acceleration (50 sec to move at max velocity a=.1 acceleration (50 sec to move at max velocity a=.1 ft/sec^2ft/sec^2


• Force of the WavesForce of the Waves• Strip theory (new computer data base to Strip theory (new computer data base to

deal with this)deal with this)• Cost $$$ and time were factorsCost $$$ and time were factors• Decided that the waves would be Moderate Decided that the waves would be Moderate

(4.1-8 ft)(4.1-8 ft)• Velocity of the wave would be then 2.06 Velocity of the wave would be then 2.06

ft/secft/sec• V=V=ππH/TH/T• T is the periodT is the period• H is the heightH is the height


• ΣΣF=Fa+Fw+FdF=Fa+Fw+Fd

• We have functions for known variablesWe have functions for known variables

• These forces will effect the required These forces will effect the required torque of the propellertorque of the propeller

Ship operating in waves

5.82E-03 9.85

t v a reynolds Coefficent of drag Resistance of Hull Hull+Wave F=M*A ΣF .6 eff RPM for 9" pitch in lb gear ratio0.01 0.00 0.10 1733.62 4.89E-02 0.00 9.85 13.98 23.83 39.71 299.78 476.56 238.281.00 0.10 0.10 173361.70 7.15E-03 0.01 9.87 13.98 23.84 39.73 314.18 476.81 238.402.00 0.20 0.10 346723.40 5.98E-03 0.04 9.89 13.98 23.87 39.78 328.73 477.38 238.693.00 0.30 0.10 520085.11 5.43E-03 0.08 9.94 13.98 23.91 39.85 343.27 478.23 239.124.00 0.40 0.10 693446.81 5.08E-03 0.14 9.99 13.98 23.97 39.94 357.82 479.34 239.675.00 0.50 0.10 866808.51 4.84E-03 0.21 10.06 13.98 24.03 40.06 372.36 480.69 240.346.00 0.60 0.10 1040170.21 4.65E-03 0.29 10.14 13.98 24.11 40.19 386.91 482.27 241.147.00 0.70 0.10 1213531.91 4.50E-03 0.38 10.23 13.98 24.20 40.34 401.45 484.08 242.048.00 0.80 0.10 1386893.62 4.37E-03 0.48 10.33 13.98 24.31 40.51 416.00 486.11 243.069.00 0.90 0.10 1560255.32 4.27E-03 0.59 10.44 13.98 24.42 40.70 430.55 488.36 244.1810.00 1.00 0.10 1733617.02 4.17E-03 0.71 10.57 13.98 24.54 40.90 445.09 490.81 245.4111.00 1.10 0.10 1906978.72 4.09E-03 0.85 10.70 13.98 24.67 41.12 459.64 493.47 246.7412.00 1.20 0.10 2080340.43 4.02E-03 0.99 10.84 13.98 24.82 41.36 474.18 496.34 248.1713.00 1.30 0.10 2253702.13 3.96E-03 1.14 10.99 13.98 24.97 41.62 488.73 499.40 249.7014.00 1.40 0.10 2427063.83 3.90E-03 1.31 11.16 13.98 25.13 41.89 503.27 502.66 251.3315.00 1.50 0.10 2600425.53 3.85E-03 1.48 11.33 13.98 25.31 42.18 517.82 506.12 253.0616.00 1.60 0.10 2773787.23 3.80E-03 1.66 11.51 13.98 25.49 42.48 532.36 509.77 254.8817.00 1.70 0.10 2947148.94 3.75E-03 1.85 11.71 13.98 25.68 42.80 546.91 513.61 256.8118.00 1.80 0.10 3120510.64 3.71E-03 2.05 11.91 13.98 25.88 43.14 561.45 517.64 258.8219.00 1.90 0.10 3293872.34 3.67E-03 2.26 12.12 13.98 26.09 43.49 576.00 521.86 260.9320.00 2.00 0.10 3467234.04 3.64E-03 2.48 12.34 13.98 26.31 43.85 590.55 526.26 263.1321.00 2.10 0.10 3640595.74 3.61E-03 2.71 12.57 13.98 26.54 44.24 605.09 530.84 265.4222.00 2.20 0.10 3813957.45 3.57E-03 2.95 12.81 13.98 26.78 44.63 619.64 535.61 267.8123.00 2.30 0.10 3987319.15 3.54E-03 3.20 13.05 13.98 27.03 45.05 634.18 540.56 270.2824.00 2.40 0.10 4160680.85 3.52E-03 3.46 13.31 13.98 27.28 45.47 648.73 545.69 272.8525.00 2.50 0.10 4334042.55 3.49E-03 3.72 13.57 13.98 27.55 45.92 663.27 551.00 275.5026.00 2.60 0.10 4507404.26 3.46E-03 4.00 13.85 13.98 27.82 46.37 677.82 556.49 278.2427.00 2.70 0.10 4680765.96 3.44E-03 4.28 14.13 13.98 28.11 46.85 692.36 562.15 281.0728.00 2.80 0.10 4854127.66 3.42E-03 4.57 14.42 13.98 28.40 47.33 706.91 567.99 283.9929.00 2.90 0.10 5027489.36 3.39E-03 4.87 14.72 13.98 28.70 47.83 721.45 574.00 287.0030.00 3.00 0.10 5200851.06 3.37E-03 5.18 15.03 13.98 29.01 48.35 736.00 580.18 290.0931.00 3.10 0.10 5374212.77 3.35E-03 5.50 15.35 13.98 29.33 48.88 750.55 586.54 293.2732.00 3.20 0.10 5547574.47 3.33E-03 5.83 15.68 13.98 29.65 49.42 765.09 593.07 296.5433.00 3.30 0.10 5720936.17 3.31E-03 6.16 16.01 13.98 29.99 49.98 779.64 599.77 299.8934.00 3.40 0.10 5894297.87 3.30E-03 6.50 16.36 13.98 30.33 50.55 794.18 606.64 303.3235.00 3.50 0.10 6067659.57 3.28E-03 6.86 16.71 13.98 30.68 51.14 808.73 613.68 306.8436.00 3.60 0.10 6241021.28 3.26E-03 7.22 17.07 13.98 31.04 51.74 823.27 620.89 310.4537.00 3.70 0.10 6414382.98 3.25E-03 7.59 17.44 13.98 31.41 52.36 837.82 628.27 314.1338.00 3.80 0.10 6587744.68 3.23E-03 7.96 17.82 13.98 31.79 52.98 852.36 635.81 317.9139.00 3.90 0.10 6761106.38 3.21E-03 8.35 18.20 13.98 32.18 53.63 866.91 643.52 321.7640.00 4.00 0.10 6934468.09 3.20E-03 8.74 18.59 13.98 32.57 54.28 881.45 651.39 325.7041.00 4.10 0.10 7107829.79 3.19E-03 9.14 19.00 13.98 32.97 54.95 896.00 659.43 329.7242.00 4.20 0.10 7281191.49 3.17E-03 9.55 19.41 13.98 33.38 55.64 910.55 667.64 333.8243.00 4.30 0.10 7454553.19 3.16E-03 9.97 19.83 13.98 33.80 56.33 925.09 676.01 338.0044.00 4.40 0.10 7627914.89 3.15E-03 10.40 20.25 13.98 34.23 57.04 939.64 684.54 342.2745.00 4.50 0.10 7801276.60 3.13E-03 10.83 20.69 13.98 34.66 57.77 954.18 693.23 346.6246.00 4.60 0.10 7974638.30 3.12E-03 11.28 21.13 13.98 35.10 58.51 968.73 702.09 351.0447.00 4.70 0.10 8148000.00 3.11E-03 11.73 21.58 13.98 35.56 59.26 983.27 711.10 355.5548.00 4.80 0.10 8321361.70 3.10E-03 12.19 22.04 13.98 36.01 60.02 997.82 720.28 360.1449.00 4.90 0.10 8494723.40 3.09E-03 12.65 22.51 13.98 36.48 60.80 1012.36 729.62 364.8150.00 5.00 0.10 8668085.11 3.08E-03 13.13 22.98 13.98 36.96 61.59 1026.91 739.12 369.56

running at speed 13.13 22.98 0.00 38.30 #VALUE! 459.62 229.81

At shaft At motor (no losses in case)added coefficient of wave Cr=(.36+(15.2/(1000*log(L)+.6) resistance to wave R=C*ρ*?^2/3*V²

Development of spread Development of spread sheetsheet

• As can be seen we can replace these variables conveniently for As can be seen we can replace these variables conveniently for others if we want to resize the ship, sea current, or accelerationothers if we want to resize the ship, sea current, or acceleration

PropellerPropeller

• The propeller has 2 functions velocity and The propeller has 2 functions velocity and thrustthrust

• We have a 12X9 folding propellerWe have a 12X9 folding propeller• Folds while sailing to reduce drag and Folds while sailing to reduce drag and

enhance sailing pleasureenhance sailing pleasure• Diameter=12 inDiameter=12 in• Pitch=9 inPitch=9 in• Pitch is the distance that will produce a helix Pitch is the distance that will produce a helix

in 1 revolutionin 1 revolution• =.75 ft/revolution=.75 ft/revolution

Velocity & The PropellerVelocity & The Propeller

• Slip is the amount of force that cannot be Slip is the amount of force that cannot be used due the propeller spinused due the propeller spin

• Sail boat propeller will have a 45% slip Sail boat propeller will have a 45% slip theoreticaltheoretical

• V required=V boat + slipV required=V boat + slip• (i.e. at 5.0 ft/ sec, the propeller is (i.e. at 5.0 ft/ sec, the propeller is

required to act as if moving 9.09 ft/sec)required to act as if moving 9.09 ft/sec)• But we must increase our velocity as well, But we must increase our velocity as well,

due to the fact of the incoming wavesdue to the fact of the incoming waves

SlipSlip

Efficiency of the PropEfficiency of the PropEfficiency is a function Efficiency is a function of the slip and the pitch of the slip and the pitch ratio (diameter/pitch)ratio (diameter/pitch)Must be added to the Must be added to the ΣΣFF

Motor SelectionMotor Selection

• PMG 132 Permanent Magnet MotorPMG 132 Permanent Magnet Motor

• CapabilityCapability– 24V~72V24V~72V– 110 Amp Continuous Current110 Amp Continuous Current– 200 Amp 10 Minute Current200 Amp 10 Minute Current

• Light Weight (24.8lb)Light Weight (24.8lb)

Advantages of PMG 132 Advantages of PMG 132 MotorMotor• In comparison to the Briggs and Stratton In comparison to the Briggs and Stratton

ETEK:ETEK:– PMG 132 has 50% higher power peak at the same PMG 132 has 50% higher power peak at the same

Voltage.Voltage.– PMG 132 is a “Pancake Style” Motor with PMG 132 is a “Pancake Style” Motor with

dimensions of 222mm O.D. and 162.55mm Width dimensions of 222mm O.D. and 162.55mm Width compared to the ETEK dimensions of 254mm O.D. compared to the ETEK dimensions of 254mm O.D. and 187.7mm width.and 187.7mm width.

– CostCost• Etek: $1199.00 Etek: $1199.00

• PMG 132: $989.00PMG 132: $989.00

85% efficiency at Running Speed of required 5.067 ft/s

5.303hp to produce a Running Speed of required

5.067 ft/s

Motor Curve from PMG

Energy Consumed With Motor Efficiency

0

2

4

6

8

10

12

1 6 11 16 21 26 31 36 41 46 51 56

Time (s)

En

erg

y (k

J)

Energy Consumed WithMotor Efficiency

Peak Energy Consumed at 51s

Energy Consumed Per

Second Decreases at

52s. (5.067ft/s)

Battery Life

0

20

40

60

80

100

30 34 38 42 46 50 54 58 62 66 70 74 78 82 86

Time (min)

Per

cen

t B

atte

ry

Rem

ain

ing

85% of Battery Life Will be Remaining after 30min Drive Time

Battery Life Will Be Depleted After 86min

Drive Time

ControllerController

•AXE AXE Performance Performance Products used Products used for for SERIES WoundSERIES Wound or or Permanent Permanent MagnetMagnet Electric MotorsElectric Motors

ControllerController

• AXE 4834AXE 4834

• 24 – 48V24 – 48V

• Current Limit: 300ACurrent Limit: 300A

• 5 min rating: 200A5 min rating: 200A

• 1 hour rating: 135A1 hour rating: 135A– Voltage drop @100A: 0.30VVoltage drop @100A: 0.30V

ThrottleThrottle

• Interface between driver and motor Interface between driver and motor controllercontroller

• Specifies amount of electricity to be Specifies amount of electricity to be sent to motorsent to motor

ThrottleThrottle

• Curtis type Potbox Curtis type Potbox potentiometerpotentiometer

• Designed to be Designed to be easily connected easily connected to a foot pedal by to a foot pedal by cablecable

• $85$85

Electrical diagram for motor

• Other components include:Other components include:– Toggle switch for forward/reverseToggle switch for forward/reverse– Contactor (battery disconnect, operated Contactor (battery disconnect, operated

by controller)by controller)– FuseFuse– Ignition switchIgnition switch

POWER GENERATION POWER GENERATION AND ELECTRICAL AND ELECTRICAL

SYSTEMSYSTEM

1978 O’Day251978 O’Day25

Distribution of PowerDistribution of Power

MOTOR HOUSE

WIND SOLAR

FUEL GENERATOR

AC GENERATOR

BATTERIES

WATER

House Amp Draw

Appliance (DC Power)

Volt power Amps X

UsageHours/Day =

Power ConsumedAmp-Hours/Day

Auto Pilot

.5-1.5Amps

dependingon trim 12 18

AM/FM/CD Radio 1 2 2

Bilge Blower 2.5 (15 min) .25 .625

Depth Sounder 0.1 12 1.2

GPS 0.1 12 1.2

Inverter (Cell Phone) 0.3 2 0.6

Knotmeter 0.1 12 1.2

Light, handheld spotlight 4.8 (10 min) 0.16 .768

Light, anchor (LED) 0.1 8 0.8

Light, Port (LED) 0.168 2 0.336

Light, starboard (LED) 0.168 2 0.336

light, stern (LED) .04-.25 2 0.5

Light, Masthead (LED) .04-.25 0.5 0.125

Light, Foredeck lighting 2 (15 min) 0.25 .5

light, cabin courtesy lighting LED (5 fixtures) .026(5)

4 amps with 2 fixtures 0.104

Compass 0.1 2 0.2

Portable DVD player 2.2 2 4.4

House Amp Draw

Appliance (DC Power)

Volt power Amps X

UsageHours/Day =

Power ConsumedAmp-Hours/Day

If using Built in VHF

radio

Wind Speed Indicator 0.1 2 0.2

Radio, VHF, receive 1.5 7 10.5

Radio, VHF, transmit 5 (15 min)

0.25 1.25

Radio, VHF, standby 0.5 7 3.5

Total Amps/Day 48.38

If using Handheld VHF radio

Radio, VHF, receive 1.5 2 3

Radio, VHF, transmit 5 0.25 1.25

Handheld VHF radio (M72) charger 0.04125 8 0.33

Good for up to 20 hours

use(90% standby)

Total Amps/Day 37.71

Battery PowerBattery PowerOur motor batteries will be powering a DC motor with a 48 volt, 110-amp draw once the motor is up to speed.

Our system will be a 48V 280Ah bank, however most experts agree that marine batteries should not be run below 50% charge, thus leaving us with about 140Ah to work with. In our situation, we consider the batteries dead at 50%.

Our propulsion team estimates that the batteries will be at 85% after powering the boat into a sailing position. Doing this allows us to have more power for returning and also providing less dependency on recharging tools while sailing.

Battery SchematicBattery Schematic

Battery SelectionBattery Selection

Motor Batteries:Motor Batteries: (8x) Group 31, 140 amp hour, 12 volt, wet-cell, deep cycle marine battery(8x) Group 31, 140 amp hour, 12 volt, wet-cell, deep cycle marine battery

Defender store (Defender store (onlineonline): $111.27 each): $111.27 each13.00" L x 6.75" W x 9.50" H, 63.40 Lbs.13.00" L x 6.75" W x 9.50" H, 63.40 Lbs.

House Battery: House Battery: (1x) Group 27, 110 amp hour, 12 volt, wet cell, deep cycle marine Battery(1x) Group 27, 110 amp hour, 12 volt, wet cell, deep cycle marine Battery

Defender store (Defender store (onlineonline): $82.75 each): $82.75 each12.00" L x 6.75" W x 9.88" H, 51.00 Lbs.12.00" L x 6.75" W x 9.88" H, 51.00 Lbs.

While wet cell batteries require more maintenance, however the cost played a larger role in selection. Compared to wet cell batteries, Gel-Cell batteries are roughly twice as expensive, and AGM are three times as costly.

The house power, with our LED kit, will be drawing approximately 37 Ah. The available options gave us one 110Ah battery needed to power the house bank.

We were originally planning a 36V system, however, we switched to a 48V system to allow for a 12V or 24V charging method.

http://www.defender.com/product.jsp?path=-1%7C328%7C51495%7C306219&id=51512

http://www.defender.com/product.jsp?path=-1%7C328%7C51495%7C306219&id=51496

Wind & WaterWind & WaterGenerator ConstraintsGenerator Constraints

• High output High output

• Low dragLow drag

• Limited spaceLimited space

• Low weightLow weight

• Marine use Marine use

Wind Generator OutputWind Generator Output

Rutland 913Rutland 913WeightWeight 13kg13kg 28lbs28lbs

Turbine Dia.Turbine Dia. 910mm910mm 35-35-7/8in7/8in

Start upStart up 5knots5knots

DragDrag 1lb per 1knot1lb per 1knot

Wind @ 10knotsWind @ 10knots 1amp1amp24hours24hours

TotalTotal 24amp-24amp-hourshours

Ampair 100Ampair 100WeightWeight 12.5kg12.5kg 27lbs27lbs



DragDrag 1lb per 1knot1lb per 1knotWind @ 10knotsWind @ 10knots 0.5amp0.5amp

24hours24hours

TotalTotal 12amp-12amp-hourshours

Wind GeneratorWind GeneratorRutland 913Rutland 913

• Had highest outputHad highest output

• Quiet in operationQuiet in operation

• Low wind start upLow wind start up

• Robust Robust

Wind ControllerWind Controller•24 volt24 volt

•2 battery bank options2 battery bank options

•Shutdown switchShutdown switch

•LCD displayLCD display

•LED LightLED Light

Water Generator OutputWater Generator Output

Aquair 100Aquair 100WeightWeight 10kg10kg 22lbs22lbs

Turbine Dia.Turbine Dia. 280mm280mm 11in11in


DragDrag 20lbs @ 20lbs @ 4knots4knots

Water @ 4knotsWater @ 4knots 0.5amp0.5amp12hours12hours

TotalTotal 6amp-hours6amp-hours

Under Water 100Under Water 100WeightWeight 10kg10kg 22lbs22lbs



DragDrag 25lbs @ 25lbs @ 4knots4knots

Water @ 4knotsWater @ 4knots 2amp2amp12hours12hours

TotalTotal 24amp-hours24amp-hours

Water GeneratorWater GeneratorUnder Water 100Under Water 100

• Low start up speedLow start up speed

• High outputHigh output

• Fresh waterFresh water

Water controllerWater controller

• 24 volts24 volts

• 3 battery banks3 battery banks

• Will need a AmmeterWill need a Ammeter

Solar Power GenerationSolar Power Generation• Design ConstraintsDesign Constraints

available sunlightavailable sunlight

maximum amperage generationmaximum amperage generation limited mounting optionslimited mounting options

12 volt system12 volt system

no energy loss from shadingno energy loss from shading

Solar Panels RequiredSolar Panels Required• Unisolar US-11Unisolar US-11

located on sliding top of cabinlocated on sliding top of cabin power = 11 wattspower = 11 watts nominal voltage = 12 voltsnominal voltage = 12 volts operating voltage =16.5 voltsoperating voltage =16.5 volts operating current = 0.62 operating current = 0.62

ampsamps weight = 3.53 lbsweight = 3.53 lbs length = 19.34 inlength = 19.34 in width = 15.08 inwidth = 15.08 in depth = 0.87 indepth = 0.87 in quantity = 2quantity = 2 warranty is ten yearswarranty is ten years

• Unisolar US-64Unisolar US-64 located on radar archlocated on radar arch power = 64 wattspower = 64 watts nominal voltage = 12 voltsnominal voltage = 12 volts operating voltage = 16.5 operating voltage = 16.5

voltsvolts operating current = 3.88 operating current = 3.88

ampsamps weight = 20.2 lbsweight = 20.2 lbs length = 53.78 inlength = 53.78 in width = 29.2 inwidth = 29.2 in depth = 1.85 indepth = 1.85 in quantity = 1quantity = 1 warranty is twenty yearswarranty is twenty years

Solar Power GeneratedSolar Power Generated Based on an average of 4.5 hours of sunlight per Based on an average of 4.5 hours of sunlight per

day,day, 5.58 amp-hours per day are generated from the 5.58 amp-hours per day are generated from the

two Unisolar US-11 panelstwo Unisolar US-11 panels 17.46 amp-hours per day are generated from the 17.46 amp-hours per day are generated from the

one Unisolar US-64 panelone Unisolar US-64 panel 23.04 amp-hours per day are generated for the 23.04 amp-hours per day are generated for the

total solar systemtotal solar system

Preliminary Radar Arch Preliminary Radar Arch DesignDesign

Power Inverter SelectionsPower Inverter Selections

• Motor battery Motor battery config.config.– Output amperage Output amperage – Output voltageOutput voltage– Input voltageInput voltage– Max Power OutputMax Power Output

• House Battery House Battery config.config.– Output amperageOutput amperage– Output voltageOutput voltage– Input voltageInput voltage– Max Power OutputMax Power Output

Type of Inverters SelectedType of Inverters Selected

• Motor battery config.Motor battery config.– Output Amps = 20 Output Amps = 20

AmpsAmps– Output Volts = 48 Volts Output Volts = 48 Volts

DCDC– Input Volts = 120 Volts Input Volts = 120 Volts

ACAC– Power Output = 950 Power Output = 950

WattsWatts– MSRP Value = $445.97MSRP Value = $445.97

Type of Inverters Type of Inverters SelectedSelected• House Battery config.House Battery config.

– Output Amps = 15 AmpsOutput Amps = 15 Amps– Output Volts = 13.6 Volts Output Volts = 13.6 Volts

DCDC– Input Volts = 120 Volts Input Volts = 120 Volts

ACAC– Power Output = 200 Power Output = 200

WattsWatts– MSRP value = $99.97MSRP value = $99.97

Generator Selection Generator Selection RequirementsRequirements

• LightweightLightweight

• SizeSize

• The power required for the inverters The power required for the inverters must be at least 1150 Watts.must be at least 1150 Watts.

• Noise producedNoise produced

• Preferred diesel poweredPreferred diesel powered

Type of Generator Type of Generator SelectedSelected• Honda-EU2000iHonda-EU2000i

– Weight = approximately Weight = approximately 47lbs.47lbs.

– Size = 20.1”x11.4”x16.7”Size = 20.1”x11.4”x16.7”– Power = 1600 Watts, 120 Power = 1600 Watts, 120

Volts AC, at 13.3 Amps Volts AC, at 13.3 Amps continuous.continuous.

– Noise level = 59 dB at Noise level = 59 dB at continuous load.continuous load.

– Fuel tank capacity = 1.1 Fuel tank capacity = 1.1 GallonsGallons

– MSRP Value = $1,079.95MSRP Value = $1,079.95

Reasoning Behind SelectionReasoning Behind Selection

• Diesel generators are too heavy for Diesel generators are too heavy for an application on a 25’ boat.an application on a 25’ boat.

• The generator selected meets all of The generator selected meets all of the design requirements and is the the design requirements and is the most efficient choice to use.most efficient choice to use.

Project ProgressionProject Progression

• Selection of solar charge controllerSelection of solar charge controller

• Wiring diagramsWiring diagrams

• Hardware attachment designsHardware attachment designs

• Central control panelCentral control panel

• Cost analysisCost analysis

General MechanicalGeneral Mechanical

Progress ReportProgress Report

Battery MountingBattery Mounting

Battery MountingBattery Mounting• Extra 5 Batteries will be mounted in Extra 5 Batteries will be mounted in

same area as existing batteries.same area as existing batteries.

New Batteries

Removed

Existing Batteries

Mounting ConsiderationsMounting Considerations

• Weight of the BatteryWeight of the Battery

• Dimensions of BatteryDimensions of Battery

• Dimensions of Engine RoomDimensions of Engine Room

• Material is Water ProofMaterial is Water Proof

• Federal RegulationsFederal Regulations

• Symmetry of placement so boat does Symmetry of placement so boat does not lean front to back or left to right.not lean front to back or left to right.

Battery MountingBattery Mounting

• 18 Gal Gas Tank Full x 5.67lbs/gal gas = 102lbs18 Gal Gas Tank Full x 5.67lbs/gal gas = 102lbs• 4 more Batteries for engine at 63.4 = 253.6lbs4 more Batteries for engine at 63.4 = 253.6lbs• 1 additional battery for house at 51.0 lbs1 additional battery for house at 51.0 lbs• Gaining 202.6lbs in the engine room.Gaining 202.6lbs in the engine room.

Battery MountingBattery Mounting•U.S. Coast Guard Federal Regulations.

•Battery must undergo a force of 90lbs for a duration of one minute and may not move more than one inch.

•On both vertical and horizontal axis.

Motor MountingMotor Mounting

Upper Intermediate HousingUpper Intermediate HousingInput Shaft

Seal has been removed

Lower Intermediate HousingLower Intermediate Housing

Water Pump

Shift Rod and Water Shift Rod and Water PassagesPassages

Shift Rod

Water Passages

Lower Unit AssemblyLower Unit Assembly

Lower Unit Housing

Gears

Bearing Housing

Propeller

Housing has been repaired in this

area

Progress to DateProgress to Date

Difference of .019 Inch in

these measurements


• Chart locations and dimensions of Chart locations and dimensions of holes in existing intermediate housingholes in existing intermediate housing

• Determine parts needed to Determine parts needed to reassemble existing lower unitreassemble existing lower unit

• Order parts for lower unitOrder parts for lower unit• Devise a way to measure resistance in Devise a way to measure resistance in

lower unit due to friction in bearings lower unit due to friction in bearings and sealsand seals


• Locate and obtain another lower unitLocate and obtain another lower unit

• Begin stress calculationsBegin stress calculations

• Preliminary design of replacement Preliminary design of replacement componentscomponents

• Gather information for design Gather information for design requirements of components that requirements of components that need to be mountedneed to be mounted

Crankshaft ModificationCrankshaft Modification

Cut HereAnd here

Crankshaft ModificationCrankshaft Modification

Secured by set screws

Connecting Sleeve is

fabricated

Crankshaft is turned down and keyway cut

into shaft

Motor SpacerMotor Spacer

Top View of Motor Spacer Locating

Rings

Intermediate Housing Intermediate Housing AdapterAdapter

Bottom of Motor Spacer

Locating Rings

Adapter Plate

Housing adapter Bolts to existing lower intermediate housing

Motor spacer will allow mounting of different motors if desired

Lower Unit ModificationsLower Unit Modifications

Gas Engine OperationGas Engine Operation

Water Enters

Travels Across Bearing Housing

Travels up through lower unit housing

Fills Intermediate Housing

Pumped throughout the engine for cooling

Modification of HousingModification of Housing

Block off water intake port

Drill Hole to allow oil to

enter and fill cavity

Modification of HousingModification of Housing

Block off water passage

Drill Hole to allow water to escape cavity

Given 1978 O’Day 25’ Sailboat 1978 O’Day 25’ Sailboat.

Documents

Transcript of Given 1978 O’Day 25’ Sailboat 1978 O’Day 25’ Sailboat.