Seiko Rotary Slide Rule Manual - Page 29
gallons/Imperial
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4-3. Conversion of fuel pounds and oil pounds to US gallons and Imperial gallons A. Fuel pounds -4 US gallons/Imperial gallons [Problem] 13.1 fuel pounds --> ? US gallons -4 ? Imperial gallons [Solution] (1) Bring the FUEL LBS index of the bezel ruler and 13.1 on the dial ruler in line. (2) Find the value on the dial ruler scale corresponding to the US GAL index of the bezel ruler scale. The reading is 21.8. (3) According to the rule for the division 12-1-(B)), the dial ruler scale value, 21.8, is interpreted as 2.18. (4) Find the value on the dial ruler scale corresponding to the IMP GAL index of the bezel ruler scale. The reading is 18.2. (5) According to the rule for the division (2-1-(B)), the dial ruler scale value, 18.2, is interpreted as 1.82. [Answer] 2.18 US gallons 1.82 Imperial gallons 29