So maybe it's just because I'm a theoretical physics guy, but a "solenoid" to me is an electromagnet -- and I have always presumed that they are illegal because of this.
However, I hear tell that some teams have used electromagnets in the past...
Given that we have an application that might benefit greatly from an electromagnet, and that we have a new mentor with a winder that can make us electromagnets, I must ask:
Is the "electromagnetic solenoid" an engineering term for a device that incorporates, but is more than, an electromagnet?
And if so, are electromagnets thus legal?