Recognitions:
Gold Member

## wrap a wire around a cone [urgent]

 Quote by rcgldr I have the impression that what the OP wanted is equal length segments as the wire wraps around. For opened up surface, this would mean a spiral with equal length segments every 360°. This would require a huge pitch at the start (nearly radial), and then nearly horizontal at the end. I'm not sure if it's even possible to get 2 complete wraps with "equal length" segments. I'm not sure why the OP didn't want the spacing between wires to be constant, which would translate into an Archimedean spiral (r = a θ + b) on the opened surface.
Yet again we suffer from not knowing exactly what was wanted. Should we devise some sort of pro-forma for practical enquiries (assuming this really was one), including a box for "what do you think the finished product will look like"?

I was assuming it was some electrical appliance which needed equal heat output per unit length for an element wound round a conical former. Yours sounds more like a question that a Mathematician would ask. I wonder which was the original intended question.
 sorry guys, just read this now i already wraped the wire in one of the cones, i m not a expert in maths geometry etc thats why took me so long to figure out the sophiecenta formula :D i will draw some things, to explain what my experiment is about, so u guys that are more smart than me, maybe if interested try out :D it will take some time cuz i want to write and draw my ideias.

Recognitions:
Homework Help
 Quote by rcgldr I'm not sure why the OP didn't want the spacing between wires to be constant, which would translate into an Archimedean spiral (r = a θ + b) on the opened surface.
I should have stated this as the 3d cone eqivalent of a 2d Archimediean spiral, one with equal spacing between loops of wire. For a 3d cone in spherical coordinates, this tranlates into ρ = a θ , ϕ = constant.

An unrolled cone only forms a partial disk, so I'm not sure it's a good analogy to use.
 i had i new ideia :D we can use the same method of tesla coils use convert an DC to AC and give a bit of electrical charge that the antena needs, and see if it starts to resonate. Then i dont know how convert agian to DC and see how much we get out of it :D
 Mentor Blog Entries: 8 Locked pending moderation

 Similar discussions for: wrap a wire around a cone [urgent] Thread Forum Replies Advanced Physics Homework 0 Brain Teasers 2 General Discussion 29 Forum Feedback & Announcements 2 General Discussion 40