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Inventermark
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Need torque for single 24in wheel vehicle weighing 150lbs to reach top speed of 25 mph in 5 sec. So far I have got wheel rev of 350 per minute but not sure of torque in Ft lbs
Welcome to the PF.Inventermark said:Need torque for single 24in wheel vehicle weighing 150lbs to reach top speed of 25 mph in 5 sec. So far I have got wheel rev of 350 per minute but not sure of torque in Ft lbs
Wanting to make a self propelled wheelbarrow type vehicle, wanting to figure out what size engine and hydrolic motor to power it.berkeman said:Welcome to the PF.
What is the context of your question? Is it for schoolwork? And is the 150 pound weight a total weight including the rider? Must be a light rider on a Fixie...?
Want to be remote controlled. And already have electronic seloniod, for thatMech_Engineer said:Given a speed and time, do you know how to calculate the required acceleration? Wolfram Alpha could give you some convenient back-of-the-envelope calcs: http://www.wolframalpha.com/input/?i=24mph+in+5s
Why are you planning to use a hydraulic motor?
Mech_Engineer said:Is it a solenoid with proportional control? How will you control speed? Hydraulic drive systems also need cooling heat exchangers, will you have one of those as well?
It seems obvious to me you should be using gas or electric motor but anyway...
Inventermark said:Yes, will have variable displacement pump, with electric control want to power it with gas engine, but need to know torque value to order hydrolic motor, and to size engine.
So what I am building is a powered wheel to drive a wheelbarrow type vehicle that already has two fixed wheels in front, my power unit will mount behind and needs to have variable speed and steering up to 180 degrees and wireless remote control. I am using a variable displacement pump because I can control it with an electric actuator, and also use an electric motor to run a gear or sprocket for turning the power wheel.Mech_Engineer said:So let me ask, why not drive with the engine itself rather than adding the complexity of a hydraulic drive system?
Using common automotive remotes give easy control to the electric motors and the hydrolic pump provides the transmission and cluch allowing me to be not have to control engine speed.Inventermark said:So what I am building is a powered wheel to drive a wheelbarrow type vehicle that already has two fixed wheels in front, my power unit will mount behind and needs to have variable speed and steering up to 180 degrees and wireless remote control. I am using a variable displacement pump because I can control it with an electric actuator, and also use an electric motor to run a gear or sprocket for turning the power wheel.
As a prop, will have a lightweight plastic cover that makes it appear to be a cow. I am trying to keep the weight very low to the ground to help with stability, would be interested in making it electric, but don't have much experience in that area, it will only need to operate for 3 min or less not sure of the size battery needed for that.Mech_Engineer said:I would recommend you don't make its top speed nearly so fast, rear-steer reverse tricycles are nimble but will have dynamic stability issues. I'd be hesitant to take it faster than 5 mph, are you building this thing as a go-kart or wheelbarrow for hauling stuff?
This torque is way too high. Show your work.Inventermark said:So far I have got acceleration as 7.04 ft/sec[2] that times mass should give me torque, at 2112 ft lbs...
Torque value is a measure of the amount of force required to rotate an object around an axis. It is typically measured in units of newton-meters (Nm) or foot-pounds (ft-lb).
To calculate torque value, you need to know the force applied and the distance from the axis of rotation. The formula is torque = force x distance. For example, if a force of 10 N is applied at a distance of 2 meters from the axis of rotation, the torque value would be 20 Nm.
Torque value is important in many scientific and engineering applications. It helps determine the strength and stability of structures and machines, and is crucial in designing and building effective tools and equipment.
Torque value can be measured using a torque wrench, which is a specialized tool that applies torque to a bolt or nut and measures the amount of force needed to tighten it. It can also be measured using a dynamometer, which measures the torque output of a rotating shaft.
Yes, there are different types of torque value depending on the type of force being applied. Some common types include static torque, which is a constant force applied to an object, and dynamic torque, which is a force that changes over time. There is also tightening torque, which is the amount of torque needed to tighten a fastener, and breakaway torque, which is the force required to break a bolt or nut loose.