Vehicle Definition and 411 Threads

This thread is for MATH regarding wind powered vehicles. I don't want to see your opinion. I want facts and math. PERIOD This is my (attempted) derivation of what a wind powered car is capable of. I may have accidentally derived an infinite energy machine, so if someone would check my work...

Some may already be aware of this but I discovered it for the first time today- http://www.spaceref.com/news/viewsr.html?pid=36068 http://en.wikipedia.org/wiki/Nautilus-X Looks like they may be testing the centrifuge on the ISS some time in 2013.

I'm studying the chapter 'Steady State Cornering', from the book 'Fundamentals of Vehicle Dynamics' (by Gillespie). The concept of a 'roll center' seems to be very important here, especially after the 'roll axis' is defined (line joining the front and rear roll centers). But I don't...

I am recreating a car accident, an inelastic collision. The two vehicles after the collision have an initial velocity of 21.69m/s. They skid 6m across asphalt with coefficient of friction value of 0.72. They then pass through 0.5m of gravel with a coefficient of friction value of 0.4. Finally...

Homework Statement Need some help, defining my physics problem. I have a simple model car powered by a twisted rubber band. See image. The left wheel represents the front, the right wheel represents the rear. The body is a simple chassis with 2 axles for the wheels. I set up a...

I need to power three 5 volt devices off a vehicle 12 volt axillary power. Each device draws 1.5A, 500 mA, and 750 mA. Would the vehicle 12 volt axillary power provide enough current for this? If so, what parts and configuration would I need to accomplish this? Thanks

I purchased a used vehicle. When I bought it the CPU had been reset and I was unable to get it smogged (emissions tested). When the CPU finished its cycles I got it tested and it failed. Mechanic said I should replace the EGR Valve and the 1st O2 sensor. I did so and it failed again. Then...

Homework Statement I'm building a little model vehicle that will be powered by a twisted rubber band. Givens: m_front wheels m_back wheels m_body coeff. of friction (static) = 0.2 assumed T = Torque applied = 0.86 N-m based on lab tests Weights (of above parts) by multiplying 9.81...

If a driver of a truck weighing 46,000lbs going 0mph was hit head on by a car weighing 4000lbs going roughly 60mph would the unseat belted truck driver be thrown from his truck?

Homework Statement Not sure if this is the right place, it's a past paper problem - not really homework. Anyway, the question asks for the maximum velocity a car can take round a bend without sliding or rolling over. Radius of Bend = 60m (R) Friction Co-ef = 0.55 (u) Width of car, (tyre...

Greetings everyone and thanks in advance for any help you can offer. I am currently part of a team tasked with designing and constructing an autonomous, mechanically powered two-axle vehicle capable of making left-hand u-turns around a set track. I have designed a steering mechanism I...

Last year I built an electric car. I converted a 1966 MG to electric using 8 led acid batteries (96V bus), a DC motor coupled to the transmission, and a large motor controller. The vehicle was working fine. Top speeds of 55 mpg, but with many led acid vehicles, only a 20 miles range. The DC...

hi everybody i was involved in a crash about a year ago where the driver of the other vehicle t-boned me(me on my motorbike), he tells police that he stopped. i would like to find out what his minimum speed must have been roughly (cos he did send me flying about 25 odd metres). if it's too...

I'm designing a model launch vehicle adapter (hollow truncated cone) with top diameter 60mm and lower diameter 80mm with a height of 1000mm. The skin thickness vary between options of 1.2mm 1.5mm and 2mm and I am trying to identify natural frequency. The issue is with second moment of inertia I...

"Egg Safety Vehicle" (Egg Drop Project... in a car!) Hey! This is my first post so sorry if I do anything against protocol. I need to design a sort of egg protection vehicle. I will put the egg inside of the car which will in turn be rolled down a ramp and crash into one of my classmate's...

Homework Statement Considering a 500 V, 50 HP DC machine with the following parameters, Kv=1.8 Vs/rad, tau=50 mS and ra=0.07 ohms; Bm=0 p=1.2 kg/m^3, A=2.3 m^2, Cd=0.370, Crr=0.0106, Wveh=1000 kg, g=9.8 m/S^2 Assuming the machine is connect to a single quadrant converter with a switching...

Hi All, I’m new here so please forgive me if this isn’t the right section to post in. This is a bit of an epic idea/post so I’ll just start with a basic overview and see if anyone’s interested. Summary: I’m a very good software engineer and I know a reasonable amount about maths...

I'm no physicist but find it fascinating... so as a joke/problem I am trying to work out if filling my car's body panels, trunk, backseat area with helium or hydrogen would improve 0-60 performance and why. Assuming that I have hydrogen tight air bladders and neglecting weight distribution from...

Hi friends, Presently I am in my 1st semester of my Masters and have taken course on Basic controls and Modeling, I don't have any course on Vehicle dynamics offered in our University. So can you please give sources and videos where I can get basic dynamics of vehicles so that I can apply the...

Hi all I am in the process of designing a brake inertia dynamometer to test one complete corner of a car's braking system. I'm having some trouble with what size the spinning disc of metal, that will simulate the energy of the moving car, needs to be. I have the inertia value that I need...

Homework Statement A vehicle engine has a power output of 6.2 KW and uses fuel which releases 45 MJ per kilogram when burned. At a speed of 30ms ^-1 on a level road, the fuel usage of the vehicle is 18km per kilogram. Calculate: the useful energy supplied by the engine in this time...

I have a very basic question that I have not yet found the answer to. Basically it's this: if you are traveling in a vehicle at 60 mph, what is it that allows a flying insect inside the vehicle to fly around? Is the insect traveling at 60 mph plus or minus its own speed depending on the...

Hey, how do you calculate the driven load inertia that you need to calculate the total system inertia. I know the motor rotor inertia is 2.872 lb/ft^2 and the Gear Ratio is 52:1 but I can't seem to figure out how to get the driven load inertia for the equation: WK2s = WK2m + (WK2L / GR2)...

I need help coming up with a formula for the following: If you have a source of power like from a motor that is coupled to a drivetrain such as what you would find in a car then what would be required to determine how much power is lost to the system? Not talking about basic physics with no...

Homework Statement An all-terrain vehicle with a 2,000 kg mass moves up a 15o slope at a constant velocity of 6 m/s. What is the rate of change of gravitational potential energy with time? Homework Equations W=\DeltaE/\Deltat W=FXd Ki+Ui=Ki+Ui (I think that's what it is) Pe=mgh...

Im not sure where to post this thread, so its ok if you move it. But anyways, for extra credit in physics ( and i need these points really bad) we have to create a balloon powered vehicle. In other words as air is released from the balloon, it propels the vehicle forward. I need mine to go the...

I'm a CS student interested in learning vehicle dynamics to program a simulator (like iRacing for example). I know this is a difficult task but I am willing to take the long road. So I am asking here, what math and physics subjects should I go through to make this happen? I guess it's probably...

Hi. We have a problem, we need to simulate the engine and transmission of a car in our project. Now we take rpm of the wheels and on the basis of it we calculate engine's rpm RPM = RpmFromWheels * Gear * MainGear and then we calculate and apply force from engine to the wheels. EngineForce =...

Homework Statement Joe is in a car traveling 90km/h, following Mark in a car 20m ahead traveling 110km/h. Joe then decides to throw a water balloon at Mark at an angle of 45 degrees in order to hit Mark. What speed should the water balloon be launched? Vertical: Vi = 14m/s Vf = -14m/s...

I'm calculating a hypothetical flywheel/IVT/reducer/vehicle scenerio where a flywheel with a moment of inertia of 312 ft2*lb and ang. velocity of 10,000 rpm is connected to 30-in dia. driving tire of a vehicle. The vehicle is 2000 lbs. The flywheel will accelerate the vehicle 0-60 mph in 10...

My truck was rear ended. It has a steel and chrome bumper, the vehicle that hit it has a soft bumper, and was traveling at 15 miles per hour. My bumper showed deformation by being bent in 1.27 cm and bent up 1.5 cm. The truck which was with the brakes on, also moved forward 6 inches. The soft...

Homework Statement As a traffic light turns green, a waiting car starts with a constant acceleration of 6.0 m/s^2. At the instant the car begins to accelerate, a truck with a constant velocity of 21 m/s passes in the next lane. a) How far will the car travel before it overtakes the truck? b)...

I'm just curious on how can sound waves be used to detect if cars are over the speed limit? :)

I'm looking to calculate the horizontal force produced on a plate covering a pit from a fork lift truck coming to a studden stop whilst traveling across the plate. The information known is: Mass of truck: 9800kg Velocity : 0.75 m/sec Any ideas?

There was and still is a hot debate on the matter of a wind power car that travels down the wind faster than the wind. As a part of larger interest in the subject I put the theory for this case, it can be found in my website https://sites.google.com/site/yedidianeumeier/" I welcome your comments

"No prior geometry" and the group field theory vehicle Atyy recently pointed us to a provocative quote from MTW: Mathematics was not sufficiently refined in 1917 to cleave apart the demands for "no prior geometry" and for a geometric, coordinate-independent formulation of physics. Einstein...

Technically, Air Vehicle Number 1. Cool http://www.defesabr.com/FAB/FA-37_Talon_a.jpg

Would a big one of these cause a tidal wave? Subsurface launched...

Homework Statement Hello, This is not a home work question but as I am not a math or physics major I need some help moving this problem forward. I am trying to calculate how much fuel (petrol/diesel/LPG) it takes to accelerate a vehicle and well to cut a long story sort I seem to be...

Hello, I am trying to calculate how much fuel (petrol/diesel/LPG) it takes to accelerate a vehicle and well to cut a long story sort I seem to be getting my units mixed up also whether I should us small or big calories. Lastly is the incline and issue that I also need to consider and how do I...

Homework Statement Firstly, whilst reading all this more complicated (and far more interesting) physics in other threads I feel like a dunce posting something which is probably of 'lower' level here as it were, but here goes: If we have a vehicle like a police car (with siren going) moving at...

Hi guys, I want to estimate vehicle pitching, bouncing and rolling natual frequencies. I am doubdful in the vehicle excitement. How can I understand if the excitation has a good frequency content?

Can we make a car or vehicle that can ride on the Earth's magnetic field here within the Earth's atmosphere?

What is the frequency Range with which the suspension systems and damper of 2 wheelers, 4 wheelers and heavy vehicles, vibrate? I would like to have the values for each i.e. frequency of spring suspension and damper separately and also when used in combination. I have attached a excel sheet...

i found that this invention uses water and aluminum to make hydrogen in the most efficient way, uses only 1 kg aluminum for 600km for a 900kg vehicle. for more details click the link http://anon99.tripod.com/water_engine/index2.html Is this technology a better solution for today's crisis. if...

This is more of a curiosity question rather than a homework question, and it has to do with how to relate the electrical motor torque to a vehicle's motion using Newton's Laws. Now for a vehicle (say RC car) moving forward in a straight line, the forces that are acting on it are the...

the requirement of electricity by EV would lead to huge investment in power stations so should electric vehicles be banned. For more information: [crackpot link deleted]

This is not really homework but it is work (fun) and I'm doing it at home. I’m a software guy and haven’t done a lot of physics in awhile. Actually, I’m building a dial display for a car rally computer. It’s basically a clock like display that reads out the odometer. I’m working on the...

Hi, I have a motor home that rocks quite a bit when entering driveways, speed bumps, etc. I've added some mods like Koni shocks & struts, rear http://www.timbren.com/" rubber springs, but was never able to quantify the improvements. Well times have changed! I got a hold of a M52223...

Hello A wheel rolling on a shallow rotating helix can be used to provide off vehicle power to a moving vehicle. Does anyone know of any applications where this is used, or know of any research into the matter? Thanks