Hurumanu-Wind Power

Extreme weather

Measuring weather.

Definitions:

1.  Anemometer: An instrument for measuring the speed of the wind
2. Beaufort wind scale: The Beaufort scale is an empirical measure that relates wind speed to observed conditions at sea or on land.

MATERIALS

1. Sellotape
2. Pencil
3. Pin
4. 2x Sticks
5.        4x Cups     
6. 1x Sticky note  

STEPS

1.    Sellotape the sticks to the cups.
2.   Sellotape the sticks together to make a cross.
3.   Pin the cross to the rubber on the pencil.
4.   
5.   
6. 
   

Group Investigation.

Groups size: 5 
Roles:

• Timekeeper
• Counter
• Recorder
• Anemometer Manager
• Wind Manager

1. Mount the anemometer in a place that has full access to the wind from all directions.
2. When the timekeeper says "Go", the counter in each group will count how many times the marked cup passes them in one minute and write it down.
3. Repeat the above step four (4) times and record the number of spins on the chart.

FINDINGS

• Record how many times it spins and record it in the table below.

• You will need to time them and count the number of spins.

	Place name on school grounds	Number of Spins in 15 seconds
1.	Field	20
2.	Old J Block site	15
3.	Grass hill in quad	10
4.	Tennis Court gate	3

• USING A4 PAPER DRAW YOUR RESULTS ON A GRAPH.
• TAKE A PICTURE OF THE GRAPH AND UPLOAD IT TO YOUR BLOG

WHICH IS THE WINDEST AREA AND WHY?

WHICH IS THE CALMEST AREA AND WHY?

WHERE IS THE BEST PLACE ON LAND TO BUILD A WINDMILL?

CONCLUSION:

On the field, the Anemometer spun 80 spins per minute. It had a wind speed of 13-20 kph. This speed is 3 on the Beaufort Scale. (Leaves and small twigs in constant motion; wind extends light flag.)

On the old J Block site, the Anemometer spun 60 spins per minute. It had a wind speed of 13-20 kph. This speed is 3 on the Beaufort Scale.

On the Grass Hill in the squad, the Anemometer spun 40 spins per minute. It had a wind speed of 2-5 kph. This speed is 1 on the Beaufort Scale. (Shown by the direction of wind smoke drift, but not by wind vanes.)

On the Tennis Court gate, the Anemometer spun 12 spins per minute. It had a wind speed of 2-5 kph. This speed is 1 on the Beaufort Scale.

According to the data, the most spins on the Anemometer is on the field, with 80 spins per minute and it had a wind speed of 13-20 kph. The least spins on the Anemometer was by the Tennis Court gate, it spun only 12 spins per minute. It had a wind speed of 2-5 kph. 

Wind

Beaufort Wind Scale

Beaufort Force	Wind Speed (KPH)	Spins	Indicators	Terms Used in NWS Forecasts
0	0-2	0	Calm; smoke rises vertically.	Calm
1	2-5	10	Shown by the direction of wind smoke drift, but not by wind vanes.	Light
2	6-12	40	The wind felt on face, leaves rustle; ordinary vanes moved by wind.	Light
3	13-20	80	Leaves and small twigs in constant motion; wind extends light flag.	Gentle
4	21-29	130	Raises dust and lose paper; small branches are moved.	Moderate
5	30-39	190	Small trees in leaf begin to sway; crested wavelets form on inland waters.	Fresh
6	40-50	250	Large branches in motion; whistling heard in telephone wires; umbrellas used with difficulty.	Strong
7	51-61	320	Whole trees in motion; inconvenience felt walking against the wind.	Strong
8	62-74	390	Breaks twigs off trees; generally impedes progress.	Gale
9	75-87	470	Slight structural damage.	Gale
10	88-101	550	Seldom experienced inland; trees uprooted; considerable structural damage occurs.	Whole gale
11	102-116	640	Very rarely experienced inland; accompanied by widespread damage.h	Whole gale
12	117 or more	730+	Very rarely experienced; accompanied by widespread damage.	Hurricane

	Spins per minute	Wind speed ( kph)	Beaufort Scale
Field	80	13-20 kph	3
Old J Block site	60	13-20 kph	3
Grass hill	40	2-5 kph	1
Tennis Court Gate	12	2-5 kph	1