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Old 08-26-2009, 06:56 AM
  #314  
tonyjms2005
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Default RE: New JetJoe J-Junior 4lbs turbine

Hi

I have watching this thread and it seems to me that there are two majorproblems with this little turbine, but when they are addressed it should be a good little engine:

The pre-load is wrong, the bearings are either too tight, giving higher egt's, or in some too loose causing movement and therefore fretting damage to the bearings.

Pre load spring poor quality, the spring is obviously of poor quality causing the preload to fail and as a result the bearings to fail, get a tidy washer for this and the it should be much better.


http://www.swcbearing.com/technical/Preload01.asp

I hope this helps.

Antony



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