Solar Boat Second meeting

2016

Questions?

• When do you want to have meetings – Tuesday won’t work.• We build the boat November 7 or 8. Which day works better –

Saturday or Sunday.• Know – skipper must pass swim test (50m swim, tread water 1 min)• Perfect Skipper weight is 132 lbs

The Boat

Mount motor low (for balance) but high enough to prevent any water reaching it

As horizontal as possibleSmall

support

Tube around propeller to direct thrust to the rear

Gear ratio for both endurance and speed

Where shaft goes through hull ?????

Motor Support?

Steering ?

Hard, slick Paint

1. Cooling Systems for solar panels, batteries, and motor

2. Moveable solar panels

Which propeller

Design Teams

• Mechanical• Drive Train – Gearing, shaft, seal, propeller• Pick gear ratios to try for both endurance and

speed• Steering• Throttle• Safety (floatation, bilge pump, signaling, etc.)• Design of Parts, find and order parts• Know the mechanical rules pertaining to the

boat• Technical Report

Design Teams• Electrical• Solar / Electrical Design – Electrical Systems and Connections.• Wire sizes and lengths, hookups, etc.• Pick Batteries (Odyssey 925, 28 AH) Maximum 25kg (55 lbs.) Need 2 sets

minimum. Amp Hour (AH) rating and surge power is important.• Pick Solar Panels (efficiency not as important – weight and temp. coefficient is

important.• We have motors (Perm PMG-132).• Know the electrical rules pertaining to the boat• Technical Report

Design Teams

• Hull• Steering, throttle, dead mans stick)• Safety, comfort and efficiency of skipper • Need to pick a paint (Interlux VC Offshore looks good – dries very hard,

burnishible, and contains silicone to make the boat slippery)• Skipper comfort, safety, and efficiency• Layout of components (balance – fore/aft and left/right, electrical

connections – short runs, thick wires from battery to motor, etc.) • Know the rules pertaining to the boat• Help with Technical Report

Everybody

• Help with the video

• Color and Design of the Boat

• Ways to reduce drag and improve the boat

• Drivers – Testers, Racers (Long Distance and Sprinters)

Some Requirements• Boat

• Max weight 450 lbs• Boat cannot heal more than 15 degrees with 10 kg at one side• Have bilge pump (500 GPH for 2 hours), fire extinguisher, floatation, life vest, dead mans switch,

paddle, two signal devices (audible and visual)• Power to motor stops when throttle is released• Can’t modify external dimensions• Engine, batteries, drive shaft, propeller rear of bulkhead• Instruments, steering, skipper forward of bulkhead

• Solar panels• Cannot extend more than 36 cm (14 in) from gunwale• 320 W maximum• Can’t be attached to the boat with Velcro.

• Battery• 55 lbs total weight• 24V maximum• Lead Acid

Schedule Dates Tentative• Boat Building Workshop (team) Nov 7 or 8• Rookie Workshop (teachers) Nov 21• First Technical Workshop (team) Dec 12• Technical Report #1 – Drive train/Steering (team) Dec 18• Second Technical Workshop (team) Jan 30 RSVP (teachers)??• Technical Report #2 – Solar/Electrical (team)Feb 17• Liability Forms (team) Mar 19• PSA Outline (team) Feb 19• PSA Video (team) Apr 16• Boat Inspection Day & Swim test (team) Apr 30• Boat Expenditures (teachers) May 7• Solar Cup races (team) May 13-15 (Fri-Sun)