Marky

Many thanks for the replies. Yes I am going to re-write the question as it is related to a turning turbine. I will need to understand the Latex code prior to placing. For your interest the turbine has a diameter of 2 mtr, and has a force of 4.611 kg or 45.18 n pushing it around at that speed 115rpm this is the force measured at the edge or the tip of the blades of the turbine at 115 rpm . I have calculated the power to be 544 watts. something is telling me this is in correct. Many thanks

I have a problem with this in working out getting it to watts/. I think I am doing it wrong. I can either work it out two ways. For an example, a circular solid disk with a diameter of 2 mtr and a weight of 7 kg or 70 newton this is rotating at 57rpm and I have this as 104 watts of power. Or I can do it with mass rotating around which would be .5 *7Kg = 3.5 * half the diameter V2 * Mtr/s at half radius =3 V2 and I come to an answer of 7.9 watts. Where am I going wrong !!!!. Hope that some pne can help me get some sleep. Many thanks

Hi all and many thanks for the replies, I was looking at open FOAM but all I need is a ball part number of what it could do so I can design the PMG for proof of concept. or an alternative method of finding out what it might do. What I was looking at was how if it was 100% efficient say like a Pelton turbine, as I have been told you need 4 times the amount of power to lift a weight. I am unable to get my head around this one All I am saying is if the mass pushing on the blades at say at 90 degrees at 1kg and it could lift .250 of a kg at the wing speed would it be 100% or 50% efficient Many thanks for your replies. Marky,

Hi all this is my first post on the forum so here goes. I have made a small wind turbine and was thinking on how to work out the power it generates. Please let me tell you a bit about it. I rotates un- loaded at 840 rpm, so I was looking at the best rpm would be about 420rpm. I was thinking on getting it to lift some weight or do some work. due to it's high RPM I was looking at getting going un-loaded and seeing how much it can lift before it stalls the blades or stops going round. for an example if it lifted a 4kg weight 1 mtr is one second that would be 39.2 watts of energy. would this be a good method to work out how much power the turbine would be rated or is this not the correct method. Many thanks for any help anyone can provide. Marky