CALIBRATION LESSON 2 - STILL NO FORMULAS SIMPLE ARITHMETIC

CALIBRATION - Lesson 2

SPEED - METRES PER SECOND - m/sec  AND KILOMETRES PER HOUR km/hr

PLEASE NOTE : THE AIM IS TO DETERMINE THE AREA COVERED IN A SPECIFIC TIME. AREA IS A FUNCTION OF TIME.

Previously we determined the speed of the sprayer to be 2 metres per second. Remember it travelled 100 metres in 50 seconds.

So how far will the sprayer travel in 60 seconds or 1 minute. Remember there are 60 seconds in 1 minute. At a rate of 2m/sec the sprayer travels 120 metres or 2m / sec x 60 seconds = 120 m / 60 secs or 1 minute.

Now some of you think this is ridiculous but believe me some people actually went to school and ended being dumbed down by useless teachers! Critical percepts were lost at an early age.

If 120 metres is travelled in 1 minute and we know there are 60 minutes in an hour then we can determine the metres travelled in 60 minutes or 1 hour. CALCULATE: 120 m x 60 minutes = 7'200 m / hr. Imagine you're on the sprayer. After 1 hour you will have travelled 7'200 metres. OR 7,2 kilometres.   Remember there are 1'000 metres in a kilometre.

Here's what we know.

Number of nozzle positions = 20

Nozzle spacing on boom = 0.5 metre or 50 cm. Take note : Do not get confused when using this number!   Each nozzle is covering an effective swath of 0.5 m.

Effective swath for the boom. = 20 nozzles x 0.5 m = 10 metres

Speed = 120 m / minute or 7.2 km/hr

Can you see the area covered per minute? You should get 60 m² per minute per nozzle or 1'200 m² per minute for all nozzles.

The next post looks at area and time to determine the nozzle flow rate in litres per minute.

 chemicon@multispray.com

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