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Old 05-26-2008 | 08:33 AM
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Default Scratchs on cynlinder wall of DL50?
I noticed there are couple of lines running through the cylinder wall of my DL50, see the picture. What could cause them? Scratches left by a bad ring?

The compression on the engine is OK, but not great. When comparing with another DL50 at our flying field, that engine's compression when turning the prop CW is the same as mine when turning the prop CCW. Since compression at CW should be much ore stronger than at CCW, my DL50 is compression is weak than the other one.

Any comment?
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