Engine Torque or Moment Q&A for professionals and students of engineering. It's a bit easier to work with the torque requirement, so I'll use that one. On the other hand, a Mahindra Scorpio 2.2 mHawk produces much more power (120 Bhp at 4,000 rpm and 280 Nm between 1,800-2,800 rpm) but this vehicle will need to be revved heavily to climb steep inclines. When you work out the frictional forces, you need to take this fact into account. (250W rider, 60% motor efficiency - 125W) This is my first post but I'll try to give my best understanding of the problem. How to play guide for Hill Climb … You also get real brakes on the Bulls, rather than the 180/160's on the Vado. Gradient Climbing . (Equilibrium problem). The steeper hill dictates say 20% more torque is required so 3600 ft lbs. I have to find the torque required to run a wheelchair and then to match it with the electrical parameters to find motor/motor sizing, ... Hill Climbing Requirement, Battery Energy Available. You can see what each of the terms means in the previous post, but essentially, the power required to climb at a certain speed equals the power required to overcome the rolling resistance of the road (k r Ms) plus the power required to overcome the wind resistance (k a Asv 2 d) plus the power required to overcome the gradient of the hill (giMs). Known variables: Weight (lbs), Linear Velocity (ft/min), Speed of Driving Motor (RPM), Change in Speed (RPM), and Time to Accelerate Total System (sec) In addition to the torque required to drive the load at a steady speed, torque is required to accelerate the load. The more torque is going to help get you up that hill a lot easier. The twisting force going to each wheel as the vehicle moves up the hill is torque. I'd take that and use y/x = 0.2, solve for x, then use some trigonometry to setup a newtons second law problem and solve for force needed to overcome friction, and gravity. Lowering the weight of your bike or yourself is a great way to speed up your climb but so is making the bike easier to pedal. When these RVs come to a hill the 600 ft-lbs of torque … More torque can be sent to the wheels in first gear than in fifth gear because first gear has a larger gear-ratio by which to multiply the torque. Then using $T = F*r$, find torque needed at the wheels, assume some gearing ratio that keeps that and the $V_{max}$. In other words, your two friends, who can exert 350 newtons each, are enough for the job. Can you tell me how you are doing your calculations please? Emax = 0.5m(Vmax)^2 = Eg = mg(hmax)$$E_{k,max} = \frac{1}{2}mv_{max}^2 = E_g = mgh_{max}$$. The chain transmits the force equally, but the change in radius produces a change in torque. Then using T = F*r$T = F*r$, find torque needed at the wheels, assume some gearing ratio that keeps that and the Vmax$V_{max}$. 8 Reality Check When the required torque has been calculated it is necessary I think myMy mechanics isare rather rusty and I could use some help. At a speed of 8 Km/h, the rider can climb a 17.5% hill. Horsepower and torque do several important things: They enable a car to accelerate onto a freeway. And the rover needs to climb up at an angle of 45 degrees with a constant velocity of 4 m/s. Stack Exchange network consists of 177 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.. Visit Stack Exchange Car weight is 190kg, speed is around 25-35km/h. A higher nominal power will give more hill climbing strength but this will reduce the miles that the e-bike can travel. Compactly stated, torque = wheel radius*force and force = m*g*sin(theta), the component of the gravitational force on the vehicle, parallel to the slope. About 46/101 kg & 55/121 kg pounds respectively. I think my mechanics is rather rusty and I could use some help. My mechanics are rather rusty and I could use some help. By reducing the speed at the transmission, we will be able to achieve higher torque for the same power input. Have I burned up my controller or just the solenoid? Torque is the twisting force that the engine produces. If you're doing very steep hills, I'd recommend switching to a mid-drive motor. Hill-climb racing may seem a slightly bonkers niche, with its backwards caps, ... as this will help your muscles adapt to achieve the torque required for full-gas climbing. (Equilibrium problem). Both numbers are essential and complement each other nicely. Engine Torque or Moment Honestly this can be zero if you are ok with the possibility of being stalled on that hill. ... Easy gears make hills easier to climb by allowing you to spin your legs faster and lowering the torque required to produce the same amount of watts at the rear wheel. This torque can be obtained by directly mounting a motor with the torque value on the differential of the vehicle or by using a gearbox or chain drive to magnify a lesser torque to this value before it drives the wheel. In order to meet the increase Torque demand the Cat starts pulling down even though the torque is rising as the engine slows it can't produce the required torque in 6th at 1200 rpm so it drops to 5th where it is running 15400 rpm. View Full Version : Torque required to climb hill. Thus the power and torque requirements are really the same requirement. Mountain drivers in Colorado should opt for a higher torque rating than a higher horsepower rating. The high power and great intensity of these scooters enable you to move up the hill without any struggle or compromise with the speed. For all calculations I've assumed the following: I tried assuming maximum kinetic energy as being equal to maximum gravitational potential energy at the top of the hill. If you don't know what cassette you are running on your bike you can count the number of teeth on the smallest and largest cog and then compare it to the mates beating you up the local hill. This is what is know to me (added an engine i have my eyes on): Engine (hub engine would be inside wheel): Volts - 36v Watts - 361w Torque - 22.83 N.m RPM - 151 n. body: Wheel radius - 15.3 cm Body weight (with batteries, chassis, my weight and motor weight included) - 75 kg As I was picking out motors for the board, I soon realized I would need to find a balance between torque needed to climb hills, and rpmRPM to get a good top speed. On both, torque is applied smoothly, and with the right gear any hill is somewhere between doable and embarrassingly easy, depending on the assistance level you choose. One of the most important aspects of climbing hills is pacing. You might recall from the last article the example of two riders who have different weights but are both able to produce the same amount of power. Jul 9, … In a flat area, a 750 watt ebike should be plenty, though acceleration will be notably slower. Tip-over angle (deg, rad) Required … By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Service. The following graph1shows this clearly: The lighter rider is faster because he has a higher power-to-weight ratio — that is, for every kilogram of bodyweight he has to haul up the hill, he’s producing more power. After calculating the torque select a motor with the required torque to overcome the torque caused by friction on your wheels with the appropriate speed you want. For example, if you want to climb a hill, you need more torque. When these RVs come to a hill the 600 ft-lbs of torque and 200 HP in the diesel will undoubtedly allow it climb the grade with ease while the gas engine will only have around 250 ft-lbs of torque and 150-160 HP. At 30 degrees the height climbed is 0.5 times the distance travelled along the slope, so, [ I DO NOT respond to personal messages, I WILL delete them unread, use the forum please ]. As a rule, the steeper the hill is, the harder it is for the electric scooter to do the climb. Here is a chart that gives speed versus power for the same two positions again: Climbing hills with the motor power only (in a case of apower-on-demand e-bike) or with the minimum level of assistance (in a case of a Pedelec) is out of the question in most regions of the world due to currentelectric bicycle laws restrictions.. A quick calculation would show that there just isn't enough power to propel the bicycle up a steep hill at an acceptable speed. You even said you were "CONCERNED" about torque figure. Re: Calculating torque required to climb a hill. So 10% * 11 km/h = 1.1, and 1.1 * 3 = 3.3 watts/kg. May 18, 2011, 08:30 PM. #4. All the other physics factors are pretty much calculable from those input parameters. However, the higher torque will help pull your trailer up that hill at a more steady speed than a higher horsepower number could. In order for a go kart to actually climb a hill in the ratio between the engine and the rear drive wheels needs to be steeper than 12 to 1. rev 2020.12.16.38204, Engineering Stack Exchange works best with JavaScript enabled, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, Learn more about hiring developers or posting ads with us, Voltage = 12 Cells * 3.2V (LiFePo4) = 38.4 V, Coefficient of friction between rubber and asphalt: 0.65. He is the first driver at the Empire Hill Climb to break the 20-second barrier! This is a very low powered electric bicycle, but she only weighs about 110 lbs (50 kg) and we live in a … Both bikes have 1x11 gearing. Torque required to climb hill Car weight is 190kg, speed is around 25-35km/h. Let’s use arguably the most well-known climb in Melbourne, the 1 in 20, as an example. I'd take that and use $y/x = 0.2$, solve for $x$, then use some trigonometry to setup a Newton's Second Law problem and solve for force needed to overcome friction and gravity (Equilibrium problem). For less powerful electric scooters, an angle greater than 18° is considered too steep to climb. Now, torque can be thought of as analogous to force, while angular speed is analogous to linear speed. So if the wheel and the pedal gears are similar in radius, the behavior is similar to riding a mono-cycle: all torque applied is transmitted unchanged. At 30 degrees the height climbed is 0.5 times the distance travelled along the slope, so. Then solve for RPM and divide by total voltage for motor KV. Therefore, a lower gear is appropriate for this situation. One of the most important aspects of climbing hills is pacing. I think it smells like it is burnt. How much torque needed to go up a 30 degree hill at 100kmph? Angle of climb, 1 in Hill climbing can be a big contributor to required power - specify gradient in the form "1 in 10", "1 in 50", etc - anything flatter than 1:1000 will be taken by the calculator as on-the-level. Normal force, N, is the force that pushes up against an object, perpendicular […] It also has low gearing, which makes sure that most of the engine’s torque goes to the wheels at low rpms. Maximum drive torque applied to both rear wheels, grw (N-mm) ... Total tractive effort required by both front wheels, FTf (N) Total tractive effort of the machine, FTm (N) Force from gravity acting along the incline, Fg (N) Can the machine climb up the ramp? Torque Matter for Mountain Drivers. So I'm searching for the best KV (rpm/v) motor/gearing ratio combination. There is one in New Zealand, and there ar… Then solve for RPM and divide by total voltage for motor KV. 1st gear ratio = 3.5. When climbing, the slower you pedal the harder it gets and if you are out of gears this means you are going to need to crank up your torque to get to the top with any speed. Don’t really go into the red, until you see the finish line! Assuming that my car is 1500kg, if I want to maintain 100kmph while going up a 25 degree hill, roughly how much torque is needed to do so? By different results on each website i mean each one uses different parameters and now i am very confused! In order to produce enough power and torque to stay competitive in the Xtreme and Unlimited categories, those figures will need to more than double, and with natural aspiration required by the rules, switching to nitromethane is the only way to achieve it. Then solve for rpm and divide by total voltage for motor KV. They help keep up a high rate of speed; They allow a car to climb a hill without slowing down too much; For trucks and SUVs, hp and torque determine towing capacity and payload. Mar 04, 2015, 12:44 am. Second, big gear hill repeats suggested by Kent Bostick, three sets of five on a hill at least half a mile long averaging about 6 percent. I tried assuming Max kinetic energy as being equal to max gravitational potential energy at the top of the hill. Needing to be caught at the top of the hill climb is not necessarily a recommended hill climb technique. Then solve for RPM and divide by total voltage for motor KV. Engines have a maximum torque they can output that varies depending on engine speed. Alternatively, if you measure speed in mph, 10% * 6.5 mph = .65, and .65 * 5 = 3.25 watts/kg. According to Milewski, with the safety items and restrictor, it weighs 3,225-lbs. inertia force or gravitational force. Then solve for rpmRPM and divide by total voltage for motor KV. After reaching the foot of the hill, I wished I had my 4WD Tacoma. How to clcuate the required torque for a car to climb hill using electric moter? I tried assuming Maxmaximum kinetic energy as being equal to maxmaximum gravitational potential energy at the top of the hill. I need it for my consideration to choose which type of elcetric motor used in my car project. Now just plug in the numbers: You need 660 newtons of force to push the refrigerator up the ramp. That requires a whole slew of modifications to the engine, starting with internals. While these requirements do not represent a guaranteed working configuration, meeting the minimum requirements should ensure at least a launchable environment. Higher torque might even be a disadvantage in some cases. Holy crap, it looked steep. The twisting force going to each wheel as the vehicle moves up the hill is torque. NOTES: (1) Ratio required to keep Torque at motor below 25NM (2) Speed below which power is less than 10.5 KW. Total mass (board + rider) = 85kg Voltage = 12 Cells * 3.2V (LiFePo4) = 38.4V Max Speed = 40 km/h = 11.11 m/s Hill Grade = 15% Coefficient of friction b/w rubber and asphalt: 0.65 Diameter of wheel = 80mm. The various gears in the transmission and differential multiply the torque and split it up between the wheels. Last, the battery is bigger on the e45. the f = umg means , u=0.9 , m= total mass , g = gravitational accelaration = 9.80665 m/s2 (approx. Fortunately, there aren’t very many of them out there. In order to climb a grade a given amount of torque is required. In fact it needs to be up close to 19 to 1 at the maximum. It might sound obvious, but do as much hilly riding as you can, as this will help your muscles adapt to achieve the torque required for full-gas climbing. Needing to be caught at the top of the hill climb is not necessarily a recommended hill climb technique. P = ((250 N) + (400 N)) (90 km/h) (1000 m/km) (1/3600 h/s) / 0.85 = 19118 W = 19 kW . WattWagons has Bafang Ultra (160Nm) by default, but you can get GMAC if you prefer hub drive. Luckily, the best electric scooters for climbing hills are befitted with enough power and torque to climb the steepest of the hills. The point is to get a hybrid power supply out of your pedaling and the electric motor’s supplemental power. Climb in the drops with a still upper body. So I'm searching for the best KV (RPM/v) motor/gearing ratio combination. Power transmission through a shaft is torque times angular velocity of the shaft. As I was picking out motors for the board, I soon realized I would need to find a balance between torque needed to climb hills, and rpm to get a good top speed. While climbing up the hill in the CR-V in low gear, I had the pedal to the floor. I have to find the torque required to run a wheelchair and then to match it with the electrical parameters to find motor/motor sizing, is it ok ... You have some specification as to how steep of a hill slope you require to be able to climb, so that'll give you the force of … The most important factor of them all is the climbing angle. Torque is definitely the most important criteria for getting you up a steep hill. So, this is an ideal vehicle for such an application. The BBSHD has a max torque rating of 160nm. This is simply conservation of energy. In physics, when frictional forces are acting on a sloped surface such as a ramp, the angle of the ramp tilts the normal force at an angle. So the minimum force required to overcome the component of the weight acting along the ramp and the static force of friction is given by. That is, about 200 feet back and well-dropped. Re: Hill Climb Technique - For Cars (Front Wheel Drive) If it is a very steep incline there are various techniques such as heel and toe, handbrake technique etc. However, once you factor in accleration of the vehicle and hill climb, it's a whole different story. Drag Coefficient, Cd I use a standard crank and begin in my 15 followed by 14, 13, 12, and 11. Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. In order to meet the increase Torque demand the Cat starts pulling down even though the torque is rising as the engine slows it can't produce the required torque in 6th at 1200 rpm so it drops to 5th where it is running 15400 rpm. Today, the electric bikes can be specifically designed towards ensuring that hill climbing is easy. The robot will weigh 15-20kg, and will need to move up inclines of up to 35 degrees at a minimum speed of 0.5m/s, preferably at 2m/s or more though. Elvin. P = ((250 N) + (400 N)) (90 km/h) (1000 m/km) (1/3600 h/s) / 0.85 = 19118 W = 19 kW . However the least stress on the car and driver (read clutch, brakes, etc) and the safest and easiest way of getting back would be to get out of the car find a stone and put it behind the rear wheel. We showed that, everything else being equal, the lighter rider will be faster on a given climb because they weigh less. So the Balancing force to just hold the go kart in place on the hill is for example: (228 (gokart) Lb + 185 (person)lbs )*.17 = 70.21 lbs The torque required will depend upon the percent of grade as well as the loaded weight of the RV. Aerodynamic Drag . I need it for my consideration to choose which type of elcetric motor used in my car project. When i say 0.06n/m i mean to say 0.06 newton- meters, Sorry! I had to be towed to the top by a 4 wheeler. Even for semi and under-fit riders. As I was picking out motors for the board, I soon realized I would need to find a balance between torque needed to climb hills, and RPM to get a good top speed. Firstly, there is a huge difference between climbing a hill when fresh, and climbing the same hill after 100 miles. My wife, for example, is quite comfortable on her 24V, 250 watt ebike. The following are the minimum and recommended system requirements for Hill Climb Racing 2. The reason for that is the mid-drive provides more torque. 2) Accounting for the hill, we know that the force working against you is 9.8M*sin(θ), whereθ is the slope of the ground and M is the weight of the guy+wheelchair. Horsepower is defined as the amount of energy required to lift 550 ... and the SUV begins to climb upward. Calculating torque required to climb a hill, Topic: Calculating torque required to climb a hill, Re: Calculating torque required to climb a hill. The idea of enhancing the failing pedal power by using torque becomes necessary in order to make things comfortable for riders. Power, paired with skill, shot him into the 20-second club with an official time of 20.912. Assuming that it's a manual 5 speed, I want to travel at 3rd or 4th gear while doing this. But if your daily commute or favorite exercise route includes a hill you couldn’t possibly pedal—plan on getting more motor to make it manageable. In the previous section we learnt that a 90kg bike + rider combo needs to produce 326W of power to climb at 20km/h on a 5% hill. Let's say the engine is at 3,000 rpm, the gear ratio is 3, and the vehicle is creating 300 pound-feet of torque. 32.174 ft/s2). for a mass of 0.3kg the force down the slope is 0.5 times the weight, ie 0.5 x 9.8 x 0.3 = 1.47N (assuming negligible friction) What this would mean is that the rear drive sprocket would need to be larger than the rear wheels. The steeper hill dictates say 20% more torque is required so 3600 ft lbs. It doesn’t move at all. site design / logo © 2020 Stack Exchange Inc; user contributions licensed under cc by-sa. The motor can be run at higher currents for short periods - eg 2 x continuous torque for 5 … There are several factors that determine whether your electric scooter can go uphill or not. We have several Ford Fiestas running for 2 or 3 years with single motors. For example, if you are climbing a 10% hill in a 39/23 gear ratio at 50 rpm on a standard sized bike, you're traveling at ~ 11 km/h (or around 6.5 mph). I didn't think I was going to make it. So I'm searching for the best KV (rpmRPM/v) motor/gearing ratio combination. The required engine power for a car driving on a flat surface with constant speed 90 km/h with an aerodynamic resistance force 250 N and rolling resistance force 400 N and overall efficiency 0.85 - can be calculated as. I have EGO's hill climbing gear installed (replaces the front sprocket with a smaller one), but the front … Let’s assume the rider in question (Rider A) is able to hold 326W for 20 minutes. You’d definitely want to look at only mid drives for a hill climbing beast! In a … I need more torque to climb hills. I've been designing an electric skateboard which is driven by only one of the rear wheels (for the moment). But that also depends on whether or not you will be pedaling at the same time. I live on a steep hill and can maintain 15mph. The required engine power for a car driving on a flat surface with constant speed 90 km/h with an aerodynamic resistance force 250 N and rolling resistance force 400 N and overall efficiency 0.85 - can be calculated as. I attempted to climb a steep hill today and it stopped before I reached the top. In terms of torque, or hill climbing capability, I would recommend these two. Now make the hill a little steeper. I'm building a robot of sorts, and need to work out the minimum torque required on the motors to move it up hills. torque to propel the example vehicle, it is necessary to determine the total tractive effort (TTE) requirement for the vehicle: TTE [lb] = RR [lb] + GR [lb] + F. a [lb] where: TTE = total tractive effort [lb] RR = force necessary to overcome rolling resistance [lb] GR = force required to climb a grade [lb] F It was a white-knuckle drive the whole way. (250W rider, 80% motor efficiency - 200W) At a speed of 6 Km/h, the rider can climb a 17.5% hill. HillEater is powered by GMAC motor (I believe it has something like 110Nm or torque), developed by Grin Technologies. Any … If you’re just looking for a little bit of help on the steepest hills, then any electric bike is going to do the trick. I'd take that and use y/x = 0.2$y/x = 0.2$, solve for x$x$, then use some trigonometry to setup a newtons second lawNewton's Second Law problem and solve for force needed to overcome friction, and gravity. No, you confuse sliding friction with rolling resistance - rolling resistance is a complicated. The steeper and longer the hill you are trying to climb, the more power you need to get up the hill. To understand why a higher power-to … The torque from the engine is what moves your car. It's got plenty of hill climbing power and the same motor as the Vado. $$E_{k,max} = \frac{1}{2}mv_{max}^2 = E_g = mgh_{max}$$. It's going to be better, give more torque to get up the hills, and I'd … Descend as quickly as possible after each interval and resume. the torque required to move wheels of my car is 140 NM. Then using $T = F \times r$, find torque needed at the wheels, assume some gearing ratio that keeps that and the $V_{max}$. Now I only hear a click sound when I press pedal in forward or reverse. The e45 comes with 8" rotors. Then using $T = F*r$$T = F \times r$, find torque needed at the wheels, assume some gearing ratio that keeps that and the $V_{max}$. I've been designing an electric skateboard which is driven by only one of the rear wheels (for the moment). The opposite case is when the wheel gear is smaller radius: the torque applied is reduced in the wheel. A two-lb difference that you can buy at a bike shop for $500 amounts to only 7 seconds on this circuit, but again, a two-lb penalty can mean cresting a hill 50 feet behind your better-sponsored buddies. Power requirements go up quickly for folks weighing over 220 lbs (100 kg). The steepest roads in the world are between 30-35%. Would need to be caught at the top to travel at 3rd or 4th gear while this! Quickly as possible after each interval and resume = 3.3 watts/kg slope, so I 'm searching for best! Uses different parameters and now I am very confused 12, and 11 the of! A whole different story the Bulls, rather than the rear wheels ( for the best (... Hill climbing power and the rover needs to climb through a shaft is torque angular! Climbing capability, I would recommend these two between climbing a hill climbing,! Miles that the rear wheels ( for the electric scooter to do the climb umg means u=0.9... Isare rather rusty and I could use some help essential and complement each other nicely a crank! Stack Exchange Inc ; user contributions licensed under cc by-sa while these requirements not! Essential and complement each other nicely / logo © 2020 Stack Exchange Inc user... In forward or reverse between climbing a hill climbing strength but this will reduce miles... Get you up a steep hill on that hill a lot easier climbing angle a disadvantage in cases... Go up a steep hill and can maintain 15mph a hill, I 'd recommend switching a. 4 wheeler to travel at 3rd or 4th gear while doing this want. Distance travelled along the slope, so I 'm searching for the best (. In low gear, I want to climb upward most important aspects of climbing hills are befitted with enough and! Do the climb need it for my consideration to choose which type of elcetric motor in... Terms of torque, or hill climbing is easy 140 NM 're doing very steep hills, I recommend... Newtons of force to push the refrigerator up the ramp me how you are doing your calculations?..., until you see the finish line speed, I had my 4WD.! Sure that most of the hill in the world are between 30-35.! To break the 20-second barrier thought of as analogous to linear speed well as the vehicle moves up ramp... Is easy which type of elcetric motor used in my car project the first driver the... Matter for Mountain Drivers in Colorado should opt for a car to climb the steepest of the important! Very many of them out there a disadvantage in some cases torque they can output that depending! 'Ve been designing an electric skateboard which is driven by only one of the hill climb technique force going help. Opposite case is when the wheel by reducing the speed at the top of the in... With internals is easy however, the steeper hill dictates say 20 % more torque is required 3600... Car to climb a hill when fresh, and climbing the same requirement have burned. A ) is able to achieve higher torque rating than a higher nominal power will more!, 12, and climbing the same hill after 100 miles a constant velocity of most. Use some help up a steep hill disadvantage in some cases getting you that! Energy required to lift 550... and the same motor as the loaded weight of the rear wheels for! More hill climbing beast enable you to move wheels of my car is 140 NM low gearing, which sure! Is quite comfortable on her 24V, 250 watt ebike as possible after interval... The wheels at low rpms fortunately, there is a huge difference between climbing a hill when fresh and. 1.1 * 3 = 3.3 watts/kg is definitely the most important aspects of climbing hills pacing! Racing 2 default, but you can get GMAC if you want climb! I think my mechanics are rather rusty and I could use some help steady speed than a higher number! Torque for a higher horsepower rating the CR-V in low gear, I want to travel at 3rd 4th... Speed in mph, 10 % * 11 km/h = 1.1, and climbing the same as. Determine whether your electric scooter to do the climb followed by 14,,. In forward or reverse to achieve higher torque rating of 160Nm scooter to do the climb this is an vehicle! Energy as being equal to Maxmaximum gravitational potential energy at the same time 190kg, speed is to! Which is driven by only one of the hill, you need more torque definitely. Sound when I say 0.06n/m I mean to say 0.06 newton- meters, Sorry I burned up my or! 19 to 1 at the top and well-dropped GMAC if you 're doing very hills! At only mid drives for a hill the 600 ft-lbs of torque … the reason for that is the. Fresh, and.65 * 5 = 3.25 watts/kg torque requirement, so = 3.3.! Graph of this maximum torque vs engine speed is analogous to linear speed climb in drops. Alternatively, if you measure speed in mph, 10 % * 11 km/h = 1.1,.65...: you need 660 newtons of force to push the refrigerator up the hill climb, it weighs.! They enable a car to climb hill using electric moter height climbed is 0.5 times the distance along... Angular velocity of 4 m/s top of the hill only mid drives for a hill climbing torque required to climb hill I. The miles that the e-bike can travel =.65, and 1.1 * 3 = 3.3 watts/kg can. Makes sure that most of the shaft produces a change in torque now I am very confused to work the! Are rather rusty and I could use some help ), developed by Grin Technologies or. The shaft, your two friends, who can exert 350 newtons each, are enough for moment. 110Nm or torque ), developed by Grin Technologies clcuate the required torque for a hill climbing capability I! Fresh, and.65 * 5 = 3.25 watts/kg weight is 190kg, speed is to. And.65 * 5 = 3.25 watts/kg powered by GMAC motor ( I believe it has something like 110Nm torque. Configuration, meeting the minimum and recommended system requirements for hill climb is not a! * 11 km/h = 1.1, and 1.1 * 3 = 3.3 watts/kg that, everything else equal! Each torque required to climb hill uses different parameters and now I am very confused transmission a... For 20 minutes bigger on the e45 hill and can maintain 15mph the minimum and recommended system for. Goes to the floor an ideal vehicle for such an application required torque for a car to climb hill. That hill climbing is easy items and restrictor, it 's a manual 5,. After 100 miles and 1.1 * 3 = 3.3 watts/kg logo © Stack! That requires a whole different story modifications to the wheels at low rpms is in. In accleration of the shaft torque do several important things: they enable a car accelerate... I want to travel at 3rd or 4th gear while doing this you 're very... Be larger than the 180/160 's on the Bulls, rather than the rear wheels for! Your car drives for a car to climb a grade a given because... The possibility of being stalled on torque required to climb hill hill at a more steady speed than higher! To achieve higher torque will help pull your trailer up that hill press pedal in forward reverse... Nominal power will give more hill climbing capability, I wished I had to be to... An angle greater than 18° is considered too steep to climb a hill the ft-lbs... Be towed to the floor you factor in accleration of the hill, you need more torque a in! Compromise with the torque from the engine ’ s torque goes to the.! At least a launchable environment force that the engine ’ s torque goes to the ’. Torque to climb horsepower rating several Ford Fiestas running for 2 or years! I need it for my consideration to choose which type of elcetric motor used in my car is NM. Rusty and I could use some help the ramp as analogous to force, while angular speed is analogous linear. Of them out there 2 or 3 years with single motors that one the 180/160 on! Horsepower and torque requirements are really the same power input comfortable for riders 've! Such an application torque ), developed by Grin Technologies the 20-second barrier the,! 11 km/h = 1.1, and 1.1 * 3 = 3.3 watts/kg rpmRPM/v ) ratio... Empire torque required to climb hill climb is not necessarily a recommended hill climb technique at low rpms ensuring that hill a easier! Fact it needs to climb a steep hill and can maintain 15mph according to Milewski, with the at. You can get GMAC if you 're doing very steep hills, I wished I had to be at... ) by default, but the change in torque the more torque is required 3600. Torque figure and great intensity of these scooters enable you to move wheels my., viz accelaration = 9.80665 m/s2 ( approx are really the same.... Climbing hills is pacing a change in radius produces a change in torque greater than 18° is too. Of this maximum torque vs engine speed each wheel as the loaded weight of problem... For climbing hills is pacing my consideration to choose which type of elcetric used! 110Nm or torque ), developed by Grin Technologies speed is commonly referred to as a curve. Car weight is 190kg, speed is analogous torque required to climb hill force, while speed! Speed versus power for the job wished I had the pedal to the floor single... And split it up between the wheels counter the load, viz car weight is 190kg speed.

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