Difference In Electromagnetic Solenoid Coil vs. Electromagnetic Tube Coil

The way to look at it is, you want maximum 'lines of flux' (Yeah I know it sounds pants, but imagine the lines going from N to S poles of the magnets) going through the coils (or more accurately as the coil [or magnet] moves it cuts through the maximum number of lines of flux.
Typically you would have wide flatish coils (the ones you link to are long and thin) with a disc magnet either side, with N and S poles facing eachother just say 10mm appart, so you have a nice strong magnetic field through the coil.
I'm at work so I can't sketch what I mean or give you the usual links. I'll post more later.

With a single magnet (say N pole) just going over one face you want to try to get a magnetic circuit from the other side of the coil core back to the S pole.

It also depends very much on what you want, do you want volts or amps or both? e.g There is a world of difference between making a generator to charge you cell phone and one to provide light.
There is tons of stuff on the web just google diy wind generator.
Hope this is some help.
Del

thanks,, a little help,, the more flat wider coil is more like the one used on the proto unit,, but they are left overs from scrapping out pinball units,, ie where the later link was to,, but those coils are old and getting hard to find, so,, the "tube coils" are available up to very large surface,, but if the magenet is only 1 in,, then it seems a bit wastefull to have a coil 4 in in diamiter? but then the field goes beyond the size of magnet,,? was just wanting more info on the tube style,, with the shell on the outer as it passes over it,, if they would cancel each other out,, the shell will be connected to the metal plate on bottom,,

the general purpose of unit,, will be more to charge batteries,, large ones,, but also want to have different size units avail,, to cover a larger market,, and yes its wind to spin magnets,, so looking to have a range of coil sizes,, small, med,, large,,

there is rectifers connected to the output of coils to change to dc,,

will the outer metal tube mess with the center core as the field passes over it? or will it help it provide a better use of them?

thanks del,,

For very strong moving coils you might consider E cores with a closing I lid. One of the most experienced nations when it comes to coils - strong ones - long travel movements - DC and AC - is Great Brittan.(UK). I remember mechanisms in buses to roll off tickets, print and guillotine units - all with coils - no motor involved!! For longer movements they usually go for a spring loaded round centerpiece with a point and a opposite shaped part in the coil. The force however is not linear over the whole length and becomes stronger when the piston nears the end piece. The spring is also at maximum strength to make a release easier, these solenoids tend to build up some remanent magnetism.