Comparison To Roots
The obvious advantage of the Powerplus over the Roots was avoidance of the need to machine the complex-shaped rotors. With the manufacturing technology of 1930, this was a serious consideration. Eyston himself already held patents related to these manufacturing difficulties.
The problem with Powerplus was firstly its complexity. Although each component was of simple form, there was some number of them, including a separate Bosch oil pump. This reduced reliability, compared to the simplicity of a Roots (once manufactured).
Secondly, studies by NACA revealed that the Powerplus was less efficient than the Roots, i.e., more power was required to drive it. This was most pronounced at low-pressure differences. Where out-and-out performance was crucial, the Powerplus was competitive. However it was not likely to be preferred where efficiency or reduced fuel consumption were the deciding factors.
Read more about this topic: Powerplus Supercharger
Famous quotes containing the words comparison to, comparison and/or roots:
“In comparison to the French Revolution, the American Revolution has come to seem a parochial and rather dull event. This, despite the fact that the American Revolution was successful—realizing the purposes of the revolutionaries and establishing a durable political regime—while the French Revolution was a resounding failure, devouring its own children and leading to an imperial despotism, followed by an eventual restoration of the monarchy.”
—Irving Kristol (b. 1920)
“We teach boys to be such men as we are. We do not teach them to aspire to be all they can. We do not give them a training as if we believed in their noble nature. We scarce educate their bodies. We do not train the eye and the hand. We exercise their understandings to the apprehension and comparison of some facts, to a skill in numbers, in words; we aim to make accountants, attorneys, engineers; but not to make able, earnest, great- hearted men.”
—Ralph Waldo Emerson (1803–1882)
“Where the world ends
The mind is made unchanging, for it finds
Miracle, ecstasy, the impossible hope,
The flagstone under all, the fire of fires,
The roots of the world.”
—William Butler Yeats (1865–1939)