Everyone wants to be a space engineer, right? Here's a challenge, how do you boil water, in space? Too easy? How do you make a 32 turn solenoid with a radius of 30 m, in space?
32 turn solenoid with radius of 30m is about 6 km. If it was made out of a single wire without a massive supporting structure you might think about using a shape memory alloy (density of 6.5 g/cm^3) You'd probably want a decent thickness of wire so lets say it has a 0.5cm diameter. That would be a 770 kg payload in and of itself. If you used something like aluminum which would require either an unrolling system or assembly it would still be 320 kg
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Maybe tone down the size a bit?
why would you want a solenoid that big anyways?