Comparing plastic turbine runners with cast metal ones

I had a message today from a customer who has 3 turbines from 3 manufacturers.  After a few years running he has this observation to make:

I have been very pleased with the PS and its nylon spoons which, even after almost 10 years at 70M head seem barely worn and I’m still on the original bearings. Both the Harris and Stream Engine needed a new runner and bearings.

About hugh

I live off-grid in NW Scotland and have spent my life playing with wind turbines. I also love small hydros. Hands on renewable energy is my thing and I like to learn and to share my experiences.
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