1. What is the Wheel Power Equation?

The Wheel Power Equation calculates the actual power delivered to the wheels from the engine's flywheel power, accounting for drivetrain losses. It's essential for performance evaluation and vehicle tuning.

2. How Does the Calculator Work?

The calculator uses the Wheel Power Equation:

Where:

• \( Wheel_{kw} \) — Power delivered to wheels (kW)
• \( Flywheel_{kw} \) — Engine power at flywheel (kW)
• \( Loss_{fraction} \) — Fraction of power lost in drivetrain (decimal)

Explanation: The equation accounts for power losses through the transmission, differential, and other drivetrain components.

3. Importance of Power Calculation

Details: Accurate wheel power calculation is crucial for vehicle performance analysis, tuning, and comparing different drivetrain configurations.

4. Using the Calculator

Tips: Enter flywheel power in kW and loss fraction as a decimal (e.g., 0.15 for 15% loss). All values must be valid (power > 0, loss fraction between 0-1).

5. Frequently Asked Questions (FAQ)

Q1: What's typical drivetrain loss for different vehicles?
A: Front-wheel drive: 10-15%, Rear-wheel drive: 15-20%, All-wheel drive: 20-25%.

Q2: How is flywheel power measured?
A: Typically measured on an engine dyno with no drivetrain components attached.

Q3: Why calculate wheel power?
A: Wheel power represents the actual power available to move the vehicle, accounting for all losses.

Q4: Are there other power loss factors?
A: Additional losses can occur from accessories (AC, alternator), elevation, and temperature.

Q5: Can this be used for electric vehicles?
A: Yes, though EV drivetrain losses are typically lower (5-10%) than ICE vehicles.