thanks for the circuit Mr RB, this is much closer to what I was looking for. I really want max current to set the duty cycle. Reason is that because this network will be used to feed into other similar "boosting" networks, and I dont want to have to deal with tons of timer chips, I just want each section of the network to regulate its own speed based off of maximum induction with very little unnecessary conduction taking place. i wanted to do it with only one switch per section, however your 2 solution is good, looks like I only need to take care of modifying one resistor to adjust, good stuff.
And I did not add any requirements in for regulation or supply or anything of the like (should have been dc supply, like battery, or constant voltage source) because even suggestions which I cannot use might get the wheels spinning and give me new ideas. thanks alot guys.
Thanks again
Edit:
Look at this!
**broken link removed**
This page describes GTO's, apparently similar to an SCR, except that when powered it turns off rather than on, says mainly for low power levels, But I know that you can make SCR's out of two back to back Fets, without freewheel diodes, so id think these could be modified as well, something along these lines would be great.