I'm aware that these do not cause an actual power loss from the vehicle. I was speaking in general terms.[email protected] said:Road friction, wind and etc does not cause a loss of power , it simply increases "road hp", the power required to keep the vehicle moving at a steady speed on a flat surface at a certain mph. It used to be tested at 30,50 and 70 mph, not sure what it is now. The only place power losses can actually occur after the engine, is in the drivetrain.
This is how Japanese companies used to manipulate their power figures to fit within the "agreement" though. That way they could say that the power was "equivalent" to 280ps on the road (known in the US as "rolling HP"), after these factors, even though it would dyno higher. It's the same basic concept used in weather with wind chill. It may be 50, but due to wind chill it feels like 45.
Here's an example of a calculator for figuring out the amount of aerodymanic and rolling HP required.
That's the problem, physics are not simple. As you said, the higher friction force, requires a higher applied force.TSXtaxy said:well said! simply physics, basically. Higher the Friction Force is, the higher the Applied Force needs to be.
Since, you're figuring this out for a vehicle's max hp, you do not have any more hp to apply. So the extra HP required to overcome that drag and friction, can be calculated as a Rolling HP loss.