Honestly just hooking the motors up to propellers rather than flettner rotors would probably do more for you in this case.. would be interesting to make that comparison though.
How did you build it?
What determines the initial rotational direction of the cylinder? Is there an electric motor that starts it spinning in the desired direction before letting the wind take over? Or does the Magnus effect alone determine the direction the cylinder starts turning? When the wind direction changed 180 degrees, the boat went the opposite direction, which makes me think that the Magnus effect alone is enough to determine rotational direction.
The model had an electric motor that kept the cylinders spinning in only one direction. So, for the boat to change course, the wind needs to come from the opposite direction.
Now that's a billion dollar industry retrofitting these onto Mega ships
I will never understand rotor ships, still cool.
Oie sou do Brasil, vocês podem me falar quais os materiais? E como montaram?
May i know the next fin, next video maybe
You should try it with the fan in the water...
@jassibo what are the revs of the cylinders? :)
kind of hard to determine if the position of the fan is not moving SS
Pretty good name!The equation roughly explains the magnus effect
"just use the fan to propel it" way to miss the point. flettner rotors are more suited for commercial ships than sails, efficient, and are simply meant to assist the engines. We are not comparing sails and flettner rotors
Thanks, just what i needed
This video showed me *exactly* what i wanted to see, a rare thing on youtube, Thank you.
Hi, can you please tell me the technical details of your ship? Like the dimensions and the speed of rotation of the cylinders? We are designing a similar boat for our project. Thank you.
@mina arands i also have the same project if any one have found details or a similar design please tell me , thanks.
have you found the details ? I have a similar project
It would but would be highly inefficient. Much better to use the fan to create thrust directly, without any cylinders.
You do know that the fan was used to simulate wind in real life, correct?
Hello, I am building a flettner car model and I was wondering what type of motor did you use for the above video. For instance what is the rpm, wattage, torque, size, axle size, the gearing, etc.
jassibo makes a good point, but once you start putting fans on the ship, why not just stick it on the back and make an airboat at that point in time. This seems like just a high tech sailboat.
Because it would be using the natural wind at sea and energy needed to spin the cylinder is less that a propeller. It is a high tech sailboat.
I have a question. Would it still move with the fan attached to the boat? or is it like the whole sailboat with a fan attached to it situation, and go nowhere?
hi!, one question... what will be the effect if the "tubes" have the same little hole of the golf ball???... that will increase the forward speed!?!?! or do smething bad in the performance of the machine!?!?!?!?!
How long did it take to cross the atlantic?
Did you try putting horizontal disks on the rotors? They should make the rotors work better by reducing spillage from the high pressure side to the low pressure side. See the paper by Salter et al. that I added to the Rotor ship article on Wikipedia (sorry, lame TheXvid doesn't let us link in comments).
Patrik, sails need a lot of ropes and well made structures to work good. Also, sails must be controlled every time. A rotor only needs a motor to rotate, and its more efficient than a sail. And leaves more space for the cargo.
You may want to investigate a physics principle called the Magnus Effect. BTW; the ship Flettner built was called the Baden-Baden. There was another one called the Barbara and there are photos on the internet of both ships.
Good job! What would happen if you put little dents all over the cylinders like the dents on a golf ball? Do you think it would drag more air along with it as it rotated and as a result move forward even faster when you put the fan on it? Hollow out 12 golf balls. Mount them on two spinning rods and try the experiment again. Compare the speeds of the two ships and have your paper with the results on my desk by the end of the weekend.
Would you care to explain why you are getting movement of the ship? Also, what are you trying to do? Are you trying to create a sailboat with cyclindrical sails? Seems like old fashioned sails work better even if you can get a little movement with this method.
The tubes spin on their axis. Through friction they drag along a little air that clings to their exterior. This air gets hit with the air current from the fan. On one side of the tube the fan is pushing air in the same direction that it's moving. The air on that side of the tube will generate lift (horizantal lift), but 180 degrees away the dragged air is hitting the fan air head on. The air current here is slowed. That creates drag. The ship shouldn't go anywhere but the video shows that itdoes