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Flypaper · 12-19-2011, 10:12 PM

If these newer engines still have rubber seals on the end of the crankcase, the seal will get no lubrication with the sealed brg installed, which it needs or its life expectancy will be very short. Crank seals need to be tight or crankcase pressure will be lost. If they're using sealed brgs and doing away with the outer seals, maybe a way to cut costs. Don't know about this one.

John5674 · 12-19-2011, 10:53 PM

Quote:

Originally Posted by Flypaper

If these newer engines still have rubber seals on the end of the crankcase, the seal will get no lubrication with the sealed brg installed, which it needs or its life expectancy will be very short. Crank seals need to be tight or crankcase pressure will be lost. If they're using sealed brgs and doing away with the outer seals, maybe a way to cut costs. Don't know about this one.

The Turnigy does have a separate seal outside of the sealed bearing. Perhaps with today's technologies and advancements in plastics, (such as PTFE) oil is not required on the seal.

The DLE does not have a separate seal, just 2 sealed bearings at the drive/prop end of the crank. They must provide adequate sealing or the engine wouldn't have such good revues.

Flypaper · 12-20-2011, 05:02 AM

Time will tell.

12-19-2011, 10:12 PM	#11
Flypaper RCC Pro Contributor I am: Gord C Join Date: Sep 2002 Location: kingston Ont. Feedback: 1 / 100% Posts: 1,863 Total Props: 8	Re: Crank Bearings - sealed or not sealed Remove this ad - become a site supporter! If these newer engines still have rubber seals on the end of the crankcase, the seal will get no lubrication with the sealed brg installed, which it needs or its life expectancy will be very short. Crank seals need to be tight or crankcase pressure will be lost. If they're using sealed brgs and doing away with the outer seals, maybe a way to cut costs. Don't know about this one. __________________ Tried for my kamikazi pilots licence. Flunked the test. Gord. MAAC 5276
	.

12-20-2011, 05:02 AM	#13
Flypaper RCC Pro Contributor I am: Gord C Join Date: Sep 2002 Location: kingston Ont. Feedback: 1 / 100% Posts: 1,863 Total Props: 8	Re: Crank Bearings - sealed or not sealed Time will tell. __________________ Tried for my kamikazi pilots licence. Flunked the test. Gord. MAAC 5276
	.

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