## What is tractive effort formula?

The tractive force between a car wheel and the surface can be expressed as. F = μt W.

Is higher tractive effort better?

The higher your speed, the lower your locomotive’s tractive effort. This decline is not linear; it happens in an exponential curve.

### What is motor tractive effort?

Definition: Tractive effort is defined as the force at the rims or the outer edges of the driving wheels of moving trains. In other words, it is the sum of the tractive force and rolling effort on the road surface.

How do you calculate tractive power?

To calculate the tractive force, multiply the coefficient of friction by the mass times acceleration due to gravity.

#### Is tractive effort the same as torque?

The tractive effort is obtained by multiplying the torque by the total ratio of power train and dividing this sum by the rolling radius of the driving tyres. r = Rolling radius of loaded driving tyre in inches.

What is total tractive effort?

Total Tractive Effort is the net horizontal force applied by the drive wheels to the ground. If the design has two drive wheels, the force applied per drive wheel (for straight travel) is half of the calculated TTE.

## How do you convert tractive effort to horsepower?

HP by definition is equal to Tractive Effort (TE) x Speed divided by 550 lb-ft per second.

How much horsepower does a train need?

between 5000 to 7000 horsepower
In most trains, the power ranges anywhere between 5000 to 7000 horsepower. Hartill, Lane.

### What is the difference between traction and tractive effort?

The force available at the contact between the drive wheel tyres and road is known as ‘tractive effort’. The ability of the drive wheels to transmit this effort without slipping is known as ‘traction’.

How do you calculate the tractive effort of a steam locomotive?

T = K * P * C 2 * S / D (Formula 7) where: T = Rated tractive force in pounds. K = 0.85 P = Maximum boiler steam pressure in pounds per square inch gauge. C = Cylinder bore diameter in inches.

#### How do you convert tractive effort to HorsePower?

How do you convert tractive effort to torque?

r = Rolling radius of loaded driving tyre in inches. The tractive effort is obtained by multiplying the torque by the total ratio of power train and dividing this sum by the rolling radius of the driving tyres.

## What does tractive effort mean in power transmission?

Defining tractive effort. Vehicles having a hydrodynamic coupling, hydrodynamic torque multiplier or electric motor as part of the power transmission system may also have a maximum continuous tractive effort rating, which is the highest tractive force that can be produced for a short period of time without causing component harm.

How do you calculate the tractive effort of a locomotive?

Alternatively, tractive effort of all ‘simple’ (i.e. non-compound) locomotives can be calculated thus: t = 0.85 d 2 n s p 2 w {displaystyle t={frac {0.85d^{2}nsp}{2w}}}. where. t is tractive effort. n is the number of cylinders. d is the piston diameter in inches.

### What is the best tractive effort estimation formula for an F7?

Tractive Effort Estimation Formula # 1 T is Tractive Effort, in Newtons. 2 P is Horsepower. Remember, the output horsepower, not the maximum horsepower! 3 V is the velocity (aka speed) in km/hr. 4 n is the locomotive’s efficiency in converting power output to tractive effort. For the F7, I found ~0.72 is best. More

How much more tractive effort in 4th gear?

So let’s look at our tractive effort graph: at 80km/h, we can use 5th gear and apply roughly 1450lb-ft of torque to the axle, or we can use 4th gear and apply 1700lb-ft of torque! That’s 17% more torque to the ground, and guess what, our HP at 80km/h is 17% higher in 4th than it is in 5th.