Download Airplanes. A LOOK BOOK Easy Reader by P.J. Harding PDF

By P.J. Harding

Written and released via P.J. Harding. one other within the 'LOOK booklet' sequence - Your baby will love this straightforward reader and impressive colour photograph publication of airplanes. each one web page has a photographic photograph of every kind of airplanes from around the world. the easy textual content is well understood through younger pre-readers and straightforward to benefit for rising readers.

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Extra resources for Airplanes. A LOOK BOOK Easy Reader

Sample text

To within 5% when ZR = 1 -04 and to within 10% when ZRe = 1-01. As an example of the method of determining Z Re , take the case of water flow at 10°C through a 2 in. pipe using an m value of 0·5 and a pressure-difference of 30 cm of water. (a) Using Figure 23 First determiney; this is given for water at 10°C on Fig. 23 as 1. Next measure off with a pair of dividers or a straight edge the vertical distance between the value of the pipe size (2) on the D scale and the value ofy (1) on they scale.

G. 73 The Net Pressure Loss As indicated in Chapter 1 and in Fig. 4, a considerable proportion of the pressure-drop h developed across an orifice plate is recovered as the downstream jet decelerates. Figure 8, taken from Reference 4, compares the extent of the net pressure loss for orifice plates expressed as a percentage of A for different m-values, with that for nozzles, venturi tubes and venturi nozzles. given pressure-difference, this loss is approximately the same for both orifices and nozzles for the same rate of flow.

20b (or Fig. 21 a, b and c). 2(v)). 2(vi)). 3 for Class-A and Class-B installations for all pipe sizes. 5 Magnitude of the Correction Factors Involved For many installations the corrections mentioned above are of a second order, though in the case of small pipes and high pressure-differences they may amount to a total of 10%. A measure of their significance may be gained from the three examples given below: (i) No corrections are necessary in any of the following cases : · ReD Pipe diameter Pressure ratio >5X105 > 16 in.

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