While visiting my local Heller-Aller I noticed it had a governor spring but apparently no buffer spring. Heller-Aller literature avaliable to me lists governor and bumper/buffer springs for many models, except for the model 28 parts list which only lists a governor spring. However, there's a pic of a 28 vane on the Vintage Windmill Parts site showing what looks like a tiny spring at the base (which may or may not be a bumper/buffer spring).
So possibly there's a bumper spring on this mill but it's too small to see?
Does the 28 have a bumper spring? If so, is it really small?
Could this be a 28?
An Aermotor buffer/bumper spring is pretty obvious.
Thanks in advance for any thoughts