In 1963 at Jefferson County Airport in Denver Ken Hoffman soloed me in a Kensair 90 hp SuperCub that had been ground looped seven times. No, the insurance company didn't own it each time. Whether partly or completely destroyed, it was rebuilt by Kensair. Labor was cheap, every A&P knew tube and fabric which also was cheap, and liability insurance was sufficient. With this economic background, Ken still was able to solo me quickly in six hours because he was comfortable letting me learn by doing.
I am a dinosaur. I still believe the student is more important than the airplane even though the cost of fabric work is much more expensive, even when inflation is factored in.
We instructors don't always tell you that at the time we take the controls we are making a static reactive correction to a ground loop in progress. That means we can stop the rotation but that we cannot go back to runway heading. Doing so would cause a ground loop in the opposite direction. That means that we are going to bump into or over whatever is out there. That means, if we are too fast, there is going to be damage.
This traumatic learning curve is less so if it happens in an ugly airplane. At the risk of being unethical, ugly airplanes can be insured for nearly the same hull value as pretty airplanes because of the price of repairs.
Finally, in the light of such high repair costs and such long down times today, there is the more common solution: the instructor stays dynamic/proactive on the controls. This generally, but not always, saves the airplane from damage. This also makes learning by watching take a long time.
As instructors, we should let the student know all this before beginning training.



