Another method for finding the drift is D = K × AV2, when we take the drift again so as to be greatest.
The second “resistance” is the total head resistance of the machine, at its maximum velocity. And the third is the thrust for climbing. The horse-power for climbing can be found out in two different ways. I first propose to deal with the method, where we find out the actual horse-power wanted for a certain climbing speed to our machine, where
| H.P. = | climbing speed/sec. × W |
| 550 |
In this case we know already the horse-power for climbing, and we can proceed with our calculation.
With the other method we shall find out the “thrust” in pounds or kilograms wanted for climbing and add it to drift and total head resistance, and we shall have the total “thrust” of our machine and we shall denote it with T, while thrust for climbing shall be Tc.
The following calculation is at our service to find out this thrust for climbing
| Vc × W | = H.P., |
| 550 |
thence
| Vc = | H.P. × 550 | (1) |
| W |