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HelicopterEngines Plugs Mufflers Fuel › OS 50 Hyper ring gap
08-11-2007 10:30 PM  10 years agoPost 1
helibatics

rrNovice

Cheshire, UK

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I've just had an interesting find on my Hyper. During reassembly after routine bearing replacement the piston ring would spring out into the inlet port and lock the engine, even though it was located on the locating pin correctly.

So I ordered a new ring and measured the new and worn ring gap. These are my findings:

New piston ring gap = 0.2mm
Worn out ring gap = 0.75mm

I'm not surprised I had a problem!

The new ring is broken in and working great!

Anyone else had a similar thing happen?

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