Calculate power lossess against road gradients

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SUMMARY

This discussion focuses on calculating power losses for a 60 cc single-cylinder water-cooled engine when driving up a 5% road gradient. The key formula provided is Preq = M * g * Vh, where Vh is the vertical speed calculated as Vtot * Grade. The context involves a school project to build a three-wheeler car intended to operate at a speed of 30 km/h. The engine's displacement and cooling system are deemed irrelevant for this specific calculation.

PREREQUISITES
  • Understanding of basic physics concepts, particularly force and power calculations.
  • Familiarity with vehicle dynamics, including speed and gradient effects.
  • Knowledge of the gravitational constant (g) and its application in calculations.
  • Basic algebra for manipulating equations and solving for variables.
NEXT STEPS
  • Research "Vehicle Dynamics and Power Requirements" for a deeper understanding of forces acting on vehicles.
  • Study "Physics of Inclined Planes" to grasp the impact of gradients on vehicle performance.
  • Explore "Calculating Power Losses in Engines" to understand how engine specifications affect performance.
  • Investigate "Designing Small Engine Vehicles" for practical insights into building and optimizing small-engine vehicles.
USEFUL FOR

This discussion is beneficial for engineering students, hobbyists building small vehicles, and anyone interested in understanding the physics of vehicle performance on gradients.

Carvinos
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i want to calcculate the power lossess of a 60 cc single cylinder water cooled engine against the 5% road gradients.can anyone help?
 
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Carvinos said:
i want to calcculate the power lossess of a 60 cc single cylinder water cooled engine against the 5% road gradients.can anyone help?

Welcome to the PF.

What is the context of your question? What vehicle is this small engine in? What speed is the vehicle moving? Is this just a paper calculation, a simulation, or do you intend to build it for a school project?
 
To calculate the power required to drive up a hill at a certain speed, calculate the vehicle's vertical speed (speed*grade), and then multiply by the vehicle's mass and G. The engine's dispplacement and cooling are not relevant in this problem.

V_{h}=V_{tot}*Grade

P_{req}=M*g*V_{h}
 
thnx for ur response.this is basically a school project and we have to build a three wheeler car, 2 wheels at the front and one at the rear and it is to be driven at 30kmph.thnx a lot once again.
 

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