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Old 06-04-2023, 12:56 PM
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Cobra Make, Engine: SPF 2291, Whipple Blown & Injected 4V ModMotor
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Quote:
Originally Posted by Austria_Cobra View Post
I know how bearings look like, what I am asking is, is there a bearing inside? ( I think so)
are there any blueprints or cutouts available of the 6100?
thx!
Because a clutch is a rotating component of the engine, anything that comes in contact with a rotating member must itself either rotate or somehow be fixed to the rotating member and then rotate with the member. This brings us back to it must rotate.

Rotating members can either use a roller or ball style of bearing or a flat surface suspended on a thin hydrostatic film of oil, style bearing. A rod bearing uses the flat surface and hydrostatic oil film model. This means your throwout bearing must use the roller/ball style. The geometry of throwout bearings lends itself handily to the ball-style bearing solution. I can not imagine a hydrostatic oil film style throwout bearing.

While the endoscope pictures are helpful and better than nothing, the only way to get the information you need is the removal and visual inspection of the throwout bearing, including an attempt to rotate it by hand. Of course, you can always choose to do any number of other things, but in the end, you will be pulling the engine and or transmission to get at that bearing for a closer look.

It may happen sooner, or it may happen later, but it is going to happen. For the most part, you can determine when unless, you wait until you are forced to act by a catastrophic bearing failure — in which case you are demoted from piloting the airplane to a being passenger who watches what happens instead of controlling it.
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