I don't know about the reliability in practice, but the official spec called for a "reliable life of 1000 hours with reasonable servicing" and a life of 5000 ho

I don't know about the reliability in practice, but the official spec called for a "reliable life of 1000 hours with reasonable servicing" and a life of 5000 hours with replacement of parts. I don't think they put a limit to aircraft performance since you're not changing altitude or speed very fast compared to the speed of a gear. The spec called for testing acceleration up to 10g.