[i]
This is not one of the motors they ship now. It probably was an old model or one-off. Again, that data that is over a year old. [/B]
If you really wanted a 2.97 you could order it from Taurus, its part number TSS-49 2.95ci, 53ozs dripping wet... The TSS line is offered as a performance upgrade at this time. Different cylinder assemblies, optional ignitions, mild internal cleanup, lightening is an option... Uses gets whats yous pays fors...
TS-42/2.6 TSS-49/2.95
22/8 Zinger @ 7200 20/10 APC @ 8000
20/10 Mejzlik @ 8200
TS-52/3.2
20/10 Menz S @ 7200
21/10 Menz S @ 6900
The problem here is were not comparing apples to apples. A given prop does and will work harder than another, irregardless of diameter and pitch. The airfoil profiles are different on all props.
Menz S props all well known for loading or dragging down an engine as compared to most other props. Zinger's on the other hand are close to the bottom of the list in loading an engine. Mejzliks are somewhere in the middle.
There is a new breed of props out there as well.