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What is the relationship between torque and speed( angular speed or in rpm ). I think they should vary linealy................because consider a fan ........ i give the fan a certain force(torque) it starts moving with some speed..........then if i increase the torque it's speed would definitely increase............

Also torque = I x Alpha where alpha is angular acc.

alpha = dw/dt...........so this shows a direct relation ship

but if i am correct why in engine torque vs rpm curves ........... torque first increase and then decreases...........how is this possible...............as to increase engine rpm engine can only do this by developing more torque...........then why such curves...............ya i know here you would suggest me the formula hp = t x rpm / 5252...........which shows inverse relationship but then what about above formula t = i x alpha.....................plz tell me where i am wrong or if i lack a certain concept..............plz explain how those engine curves are plotted then.......

I appreciate any quick and logical responses

Thanx

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# Torque vs speed

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