OPERATING CONDITIONS ASSUMPTION
In addition to the wish list of changes, operating conditions need to be assumed for this engineering study. These operating conditions are required to perform an FEA (finite element analyses) that will determine the stress and strain at every point in each of the parts. Knowing the stress and strain enables the engineer to choose appropriatmaterials, heat treatment, and surface finish for that part.
For this engineering study and redesign, the condition chosen for continuous operation (unlimited fatigue life) is 150 horsepower at 5000 RPM (158 lb-ft @ 5000 RPM). These numbers equate to about 112 miles per hour with a 3.78 rear end ratio with 4.75x19 tires. Although this condition appears unrealistic, it has been assumed for calculating stresses in this engineering study, and will provide a margin of safety for loads that can’t be reliably calculated such as shock loading, loads due to detonation, loads due to poor machine work in a later rebuild, etc.
In addition to the wish list of changes, operating conditions need to be assumed for this engineering study. These operating conditions are required to perform an FEA (finite element analyses) that will determine the stress and strain at every point in each of the parts. Knowing the stress and strain enables the engineer to choose appropriatmaterials, heat treatment, and surface finish for that part.
For this engineering study and redesign, the condition chosen for continuous operation (unlimited fatigue life) is 150 horsepower at 5000 RPM (158 lb-ft @ 5000 RPM). These numbers equate to about 112 miles per hour with a 3.78 rear end ratio with 4.75x19 tires. Although this condition appears unrealistic, it has been assumed for calculating stresses in this engineering study, and will provide a margin of safety for loads that can’t be reliably calculated such as shock loading, loads due to detonation, loads due to poor machine work in a later rebuild, etc.
