Forums > General Discussion > Cube roots for fuel consumption
| Cube roots for fuel consumption | |
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| Posted: 13 Oct 2014 21:30 UTC | Post #1 |
| AlohaDan Deck & Engine |
Registered
Total Posts: 6 |
| How does one handle cube roots for fuel problems? What calculator will the CG accept. Or will I have to review logerithem's and us tables from Bowditch? | |
| Posted: 23 Oct 2014 20:24 UTC | Post #2 |
| AlohaDan Deck & Engine |
Registered Total Posts: 6 |
| I found a solution. Assume your using the formula New Fuel Consumption =F Old Fuel Consumption = f Old speed = s New Speed = S F = S^3 (* f)/ s^3 One would generally solve the above and end up with something that looks like S^3 = F s^3 / f You can easily find s^3 by muliplying the number by itself 3 times. So you will end up with say S^3 = 2460 or a number easily calculated. You have an equation but don't have to find the root. Just list the four answers separately: A) 12.1 Then cube it again multiplying the number by itself 1771 B) 13.5 Cube is 2460 the right answer! C) 14.6 D) 15.4 Good luck! |
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