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What engine power the tractor needs to pull the implement at working speed.
Pre-sizing and estimating tool: the results do not replace a design, calculation, or report signed by a qualified professional, nor verification against the applicable standards.
Engine power in kW for different working speeds, with the force you entered.
Engine power in kW for different required forces, with the speed you entered.
Drag the controls to simulate data different from what you entered (from 30% less to 30% more) and watch the result change instantly.
Required engine power for combinations of traction force and speed, with the traction efficiency you entered.
The calculation done in steps, with the values you entered.
The calculation memo gathers this page's inputs, results, equations, assumptions, and references, with fields for project, responsible person, and review. The full report also includes the charts and interpretations, in color. In the print window, choose Save as PDF.
Enter the traction force the implement requires, in kN, and the working speed, in km/h. Also enter the tractor's traction and transmission efficiency. The calculator estimates the drawbar power and the engine power, in kW and cv.
Set that requires 15 kN of draft at 6 km/h, with an efficiency of 0.75.
Drawbar power = 15 × 6 ÷ 3.6 = 25 kW. Motor power = 25 ÷ 0.75 = 33.3 kW, or about 45 cv.
Rated power is the maximum. The implement uses only part of it, and the margin avoids working at the limit.
From the specific soil draft multiplied by the cutting area of each body (width × depth). The plow's technical sheet usually gives this value.
Important notice: the Agrocalcs tools make estimates and preliminary sizing based on the data entered and on published engineering methods. They do not replace a design, a calculation report or a report signed by a qualified professional (CREA/ART), nor verification against the applicable technical standards and legislation, such as the Regulatory Standards of the Ministry of Labor. Material and fuel properties vary: check with the manufacturer or with analyses of your process before deciding. By using the site, you agree to the Terms of Use.
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