[TR] TR Radiator "Tropical" Fan?

[Allen Hess]

I'm pretty sure that is not a TR fan, tropical or otherwise. At least  
it's not for the TR3-4. The TR fan has bolt holes which are in an X  
pattern and as someone else said, not at 90 degrees. I have what I  
believe is a tropical fan and also note that the blades are not as  
wide and may not be rectangular. I'd have to get it out to refresh my  
memory about the blade shape.

I can send a photo, but not right away.

Allen