Heads up happy JJ owners

Just heard about the Jet Joe turbine wheel that lost blade(s) at full monty [&:][:@][:-] It only takes one blade lost at 160,000rpm and balance and integrity is totally lost instantly. Luckly it was in the air safely away from any humans, babies or dogs etc, etc. just trashed the turbine and put the jet plane at risk due to the dead stick.

So Joe used to make his CCs with SS instead of inconel that didn't last long [&o][&o] a very bad call for early customers like me. I'd have a guess the inconel being used in China is scrap[8D] recovered, for casting which isn't then really inconel at all [>:]due to the missing rare essential metals. Also the balancing by taking deep cuts into the turbine wheel and ignoring the sacrificial ring is just the poorest engineering practice.

Heads up warning this can occur in the pit area at start up! so follow best practice guide rules and keep any watchers well away. Metal fatigue and poor casting voids is only detected through NDT and there isn't any QA/QC in Joes factory.

Yeh I was a JJ owner, posted on this thread right at the front pages with Easytiger about myJJ turbines and paid $4000 to Joe. I'm a little wiser now, a GTBA member, owner/builder who has seen the light or that should be seen the inner snafiu metal workmanship first hand.

Paul