Recent content by fugg

Aww, no one has worked in wind turbine design?

As the blade count increases, the solidity naturally does too. Sorry it wasn't 27% I was thinking of a different figure, but ~12%, which given that a 3 blade turbine would be ~9% seems reasonable. A 6 bladed turbine is indeed not conventional, but noise and tip speed ratio are my priorities...

Hello. I'm calculating the different parameters of a turbine design but I have some trouble with the solidity. The solidity near the hub exceeds 100%, but is an average of ~27% for a 6 bladed turbine. I'm just wondering if anyone has had experience in turbine design and if +100% solidity is...

I've been led to understand that for the same power, you'd get more torque in an electric engine assuming they both had the same rated power (e.g. 100bhp). So to get the same power from an ICE and EE, the EE could run at lower revs because it has higher torque. I was asking why, wondering if...

Right I'm aware that electric gets more torque. I'm curious about why. I have this link comparing the torque from a Tesla EV, which is indeed about flat up to 6000RPM but does steadily reduce after that http://www.velvetron.com/blog/wp-content/uploads/2008/05/tesla_torquegraph.jpg , to an IC...

Simple question. I've been reading qualitatively about the torque and power curve of electric engines versus internal combustion engines. I'm led to understand that electric engines get much higher torques even at lower speed. One argument for why electric cars are inherently more efficient than...

Over the past month, with the approaching date of the Copenhagen summit, several news and scientific articles have been prominently dedicated to various environmental issues, namely organic farming, the sustainability of keeping high levels of meat in our diets and its growth in developing...

Right but 'big oil' itself' has begun significant investment in biofuels on the scale of hundreds of millions in indiviual projects, as well as some of the big manufacturers like Rolls Royce. The filter does seem a major hurdle given the replacement of seals/rings with appropriate material...

Noone's familiar enough with biofuels to give a response?

Hello. Biofuels have higher NOx emissions but generally lower carbon emissions to my knowledge so that wouldn't seem to be it. What damage exactly are you referring to?

The US government is encouraging and limiting biofuel growth at the same time. My question is, why set the current cap of 10% on biofuels? Why is that cap there, and what would be the effects of removing it, assuming that the engine hardware is bioresistant material (i.e. no brass/copper)? Are...

Thank you. I certainly appreciate you having taken the time to take those pictures!

I don't have acess to any books to refer to. I don't need help with signage. It's not the difficulty, it's the lack of a detailed methodology. I can find the principal strains for 45 through formulas using: R=[0.5(εA-εB)2+0.5(εB-εC)2]^1/2 φ=0.5tan^-1[(2εB-εA-εC)/(εA-εC)] on the strain system. I...

Hey. I've been having some trouble getting through Mohr's circle. The googles that I've found haven't been too useful. I've seen several questions of the same calibre and what I generally need is how to derive the magnitude/direction of the principal strains as well as the principle stresses...

Diazona isn't that just begging the question? Seems a bit tough to chew but interesting nonetheless. Thanks for the responses.