Procedures

Power Tool Safety:


1. Wear goggles or safety glasses

2. Do not work alone in the lab.

3. Dry wet hands and clothing before working with electricity. Mop up all water spilled on the floor.

4. Keep the lab clean.

5. Clamp down any objects that will be used.

6. Know operation of all switches and controls before using a power tool.

7. Keep hands, fingers, feet, and all objects not being used way from moving parts.

8. Use a vacuum system to keep debris away from cutting area.



Sharp Object Safety

1. Use caution when using a sharp object.

2. Restrict the use of "sharps" to a minimum.

3. Do not use bent or broken needles, knifes, or razor blades.

4. Cover or cap needle after every use.

5. Discard used syringes, needles, or scalpels into an approved sharps container.

6. Bring all needles in a sharps container to a local fire station for disposal.



Electrical Power Safety

1. Limit the use of high power devices around water.

2. Never use frayed or cut wires when plugging in a device.

3. Never overload the outlet and use a surge protector.

4. All electrical devices should have an emergency cut off switch or ‘kill’ switch’.

5. Shut off and unplug all devices when not in use or when you leave the room unattended.







Experimental set-up

1. Use a large 6foot diameter aquarium tank fro the hydrofoil system.

2. Place a wood beam 2 by 4 across the top o the tank.

3. Place another wooden 2 x4 across the bootom of the tankweighted with concrete block.

4. Between both pieces of wood, secure two metal rod to act a s guid in which the hydrofoil will rise and fall.

5. To each hydrofoil insert a single eyelet screw.

6. To the screw run a tin filament of fishing line to a pulley on the bottom and attach it to a spring scale secure to the top of the first beam.

7. Using a trolling motor, turn the motor on low and record velocity of the spinning water.

8. This system will be used to test the lift of each hydrofoil.



Preparation of Hydrofoils:

1. Obtain 21 block of polystyrene foam that measure 26cm by 8cm by 8cm

2. Each block will be cut and sanded to a hydrofoil shape based on a premade template. Identical to the picture on the right. http://www.diracdelta.co.uk/ science/source/w/i/wing/image001.gif

3. The premade hydrofoils will be separated into three groups of 7 known as Group A, Group B and Group C.

4. The first group, Group A will be the control group and no grooves will be added.

5. The second group, Group B, will be the continuous groove group.

6. The Third group, Group C, each groove will be separated by 2cm.



Data Collection:

1. Using the first hydrofoil in group A, drill a 1/8 inch hole about 3 cm form the leading edge of the hydrofoil.

2. Drill a 1/8 inch hole about 3 cm form the trailing edge of the hydrofoil.

3. Insert the hydrofoil into the testing machine.

4. Check to make sure the hydrofoil is free to rise and fall on the metal rods in the testing machine.

5. Using a trolling motor, turn the motor on low and record the force measured on the spring scale.

6. Repeat step 5 with the trolling motor on medium speed.

7. Repeat step 5 with the trolling motor on high speed.

8. Now repeat steps 1-7 for each hydrofoil and catalog the results.



Data Analysis

1. Calculate the average water speed of each trolling motor speed using a venturi flow meter.

2. Calculate average lift of each group for each individual trolling motor speed.