There seem to be plenty of construction articles on center-fed wire fan dipoles with pairs of arms of different lengths, each pair dimensioned for a different band (e.g. half-wave 80M+40M+20M).
Would a wire fan dipole work with arms of equal physical lengths, but each pair with a different loading coil configuration (perhaps none, plus other pairs of arms tuned for different bands/frequencies with different inductors)?
If so, is there a rule-of-thumb for how far apart the wire fan elements need to be spaced (say in degrees or radians)?
Or could an (insulated) wire fan element be fed coaxially through the loading coil of another fan element? Or could a single loading coil be shared, with different taps for different top segments?