Recent content by MrNewton

Correct, test was done with old motor and NO jackplate (so 60kg in Total lighter) See here a image of the boat with old motor. I taken back my 5cm comment. Its more like 12 - 15cm The distance from the COF of the motor to the planet where its mounted is approx 30 - 40 cm Again, we can stand...

Thanks again for the responses! The centre of buoncy is approx. 140 cm (1.4m) front the rear. @sophiecentaur That is exactly what i did. Last summer i stond with a Friend on the rear of the boat. Together we weigh aboat160 kg. That was right under the limit before the rear would go under. That...

A slight increase? My body saus That the increase in torque / force on the transom is going to be massive when adding a setback But does anyone know what the equivalent Weight woud be? The reason i ask is because i know Thath with my old motor (140kg, directly mounted on the boat) i had aboat...

Hi, I want to know how to calculate the effective weight if i have an object with the weight 'X' that is mounted from the side to a wall, and what happens with the weight if i increase the distance between the wall and the object. The reason i ask is as follows for the interested. I have a...

Before i answer those questions i think i have to change the question a little bit. As Nugatory said: "This is the same problem as pushing the object at a constant speed v through still water" Now the ship has no propulsion. It is floating in the water with 0 speed. Now it wants to move up to 5...

Yes i do want to accelerate is :)

Thanks for the replies. But how is it possible that the weight of the object has no place in the formula? If you have an object A with a very large weight and another object B with very little weight, but the same surface and shape as A, it will require less power to move object B then A right?

Okay, so i found this Where A is the surface Cw is dragcoefficient p is density of the liquid v is the speed So with this formula i can calculate the friction between the water and the object in Newton. But now i want to know how to calculate the power that is needed to maintain the objects...

Thanks you! That was the word i was searching for. I adjusted it in the post

Hello there, I was wondering, and i can't seem to really find the answer to my question, i found something that looks like it, but I am not sure if i understand correctly, that why I am turning to PF.com 1) What is the basic formula of the force on a object in flowing water when we assume that...

Not sure if this is the right subforum to place this question? I stumbled on this idea, to make the cargo ship industry more efficient. The propellor of a cargo ship (<100m long) is relative inefficient, around 80% ( i know, this is pretty efficient for an boat propellor), and the harder the...

Just like every other combinations of waves on the planet right? But the MRI is DC, so doesn't have waves. How will the small AC magnetic field interfere with the MRI? Will the images of the MRI be affected? I read that if you bring a coil in which a AC current is flowing, will start to...

Thanks for your reply. The reason I am asking is because of this: A friend of mine was telling me about a project he is doing for work. He has to design a inductive coupling system for a hospital in his town. They have an MRI scanner, and normally, if a person is placed in the scanner, he will...

Hello, I am looking for some information on how 2 different types of magnetic fields interfere with each other. And i don't mean, 2 magnets, but let me be specifically: Lets say that you have a very strong static magnetic field, from a huge magnet. (for instance, the strength of the magnet of...

Hello, i am testing batteries for a project of mine. I first measure the voltage on the battery (OCV, Open Circuit Voltage), and then i place a load resistor over the battery. This results in a voltage drop with a exponential decrease in voltage like in the image. But i am working with a...