P10221: Baja 1 (Baja Driveline Test Development)

Drive Analysis

Drive, Method of Analysis:

In Theory:
The following chain & sprocket horsepower ratings were taken from the Machinist Handbook. The values reflect load ratings versus number of teeth on sprocket and drive RPM. The chart represents two aligned sprockets, mounted on parallel shafts on a horizontal plane, with suggested lubrication, and a service factor of approximately 15,000 hrs at full load operation. As you can see, our No. 50 17 tooth sprocket, spinning at a max of 4000 rpm is shown to be rated for only 3.23 hp. The Machinist Handbook also says that "Substantial increases in rated loads can be utilized, as when a service life of less than 15,000 hours is satisfactory, or when full load operation is encountered only during a portion of the required service life. It is beyond the scope of this publication to present selection procedures for all conditions." With our anticipated run time of a few hours a year, the handbook suggest our scenario would be capable of much higher horsepower numbers, yet offers ambiguity to precisely how much. Hence, we used a theory of real life application to further prove our drive concept.


2008, Industrial Press Inc., New York, NY: Machinery's handbook 28 guide. II. Machinery's handbook twenty eighth guide. III Jones, Franklin Day, 1879-1967 IV. Ryffel, Henry H. I920- V. McCauley, Christopher J. VI. Heald, Riccardo M. VII. Hussain, Muhammed Iqbal VIII.

In Application:
525 roller chain, with steel engine sprocket, and aluminum drive sprocket is common practice on 600-750cc motorcycles. Our sprocket will be ordered with a custom bolt pattern from a supplier of said motorcycle sprockets. The demonstration below validates a combo similar to our concept on a 2000 Suzuki GSX 600. The calculations show, with the 10,500 rpm redline of the bike and the known transmission and sprocket gearing, that a smaller sprocket setup in sixth gear would be turning faster then our concept while at the same time handling substantially more Horsepower and torque. This proves a good factor of safety for our drive components that will be turning slower, with more teeth engaged, and required to handle much less HP & torque.