Recent content by beginner49

. I happen this: A= arctan (ω2*r/g) being ω the car angular velocity r the curve radius and g 9.8 m/s2 but it looks too simple to be true. .

Hello mfp and thanks for replying, Yes, I can solve the acceleration of the car in the roundabout as a function of angular velocity and curve radius but I wonder how the liquid is displaced. I assumed that in the case of having an centripetal acceleration same as the gravity the fuel level and...

. I do not know how to solve this problem. I need some help. How would we find out A, the angle between the horizontal and the fuel level line inside the tank of a car?. The car speed does not change, let´s say 60 km/hr, but we are driving in a roundabout. So, the fuel inside the tank...

BadBrain and Chronos Thanks a lot for your replies. That of being able to read a newspaper is a very interesting detail. thanks again.

Hi all Currently, Voyager 1 is about 120 AU from the Sun. I wonder how big (or small) and bright would the Sun be seen from aboard this spacecraft . What approximate magnitude?. Thanks in advance.

I am afraid that is not right. That will be in the case of using pounds_feet as the torque unit. Apart from that, having a crossing point at a relationship constant is only an option which does not make the curve more reliable or accurate. In this curve the torque unit is dNm and any possible...

. Thanks a lot, Jack. You are absolutely right. Now, I have extrapolated curves beyond 6000 rpms, and I learned that at 3rd gear WOT, car would not go faster than 100 kms/hr, even keeping this long is not safe for the engine. As well, plotting a hypothetical 5th gear (1.33:1 respect to 4th)...

. Hi Jack. Thanks again for your knowledges and time. Probably that consumption figure at 40 kms/hr is not very reliable as I only drove for half an hour at that speed to learn it and statistically this is not very correct. This is an air-cooled engine and I do not know if that has anything to...

Hi Jack Here is a table with the data corresponding to the fuel consumption in litres during a 100 km trip at those different speeds. http://img545.imageshack.us/img545/3995/2cvenginecurve5jpeg.jpg I can see that the engine is more efficient as we go to a higher rpms and this is the point I...

. Thanks again, Jack, really very kind of you. About what wheel power is, I will have to learn something else. I thought that once we have subtracted the drag and rolling power from engine flywheel power, the result would give the real traction or wheel power. But as I said, I have to look...

Thanks Jack. Let me then go step by step. Instead of handling a bunch of numbers and for the sake of visibility, I will show you a couple of graphs. The following is the engine curve. On green torque function, on red, the power. Both curves are considered when the throttle plate is wide...

. Thanks a lot, Jack, for your help. I would show you all the numbers, but first, I would like to know your opinion about the following reasoning: My car needs 18 HP to maintain a 100 kms/hr speed (accounting both rolling and drag resistances). So it needs 18 HPh or 13.2Kwh of energy to...

Thanks for your reply, Jack. The point is that I am trying to plot a BSFC map of my small car engine according with the fuel consumption numbers I am empirically figuring out and I see that the sweet spot is drifted to the higher RPMs range (around 4500 RPM). Most of BSFC maps (in a...

. About a car internal combustion engine. Lets suppose the engine torque is maximum at 3500 RPMs when the engine gets also its maximum load, let's say, a 90%. This kind of data is usually shown at WOT. My question is: if the throttle is not wide open, but half open, allowing the cylinders...

Clear enough, Redbelly98 Thank you very much