4 ms·
The documents in the nasa links below don't seem to agree witht this. Actually they are not fluid bearings, they're ball bearings and mechanical surface wear wa
by throwawaylinux 5y ago
The documents in the nasa links below don't seem to agree witht this. Actually they are not fluid bearings, they're ball bearings and mechanical surface wear was a big problem for the oxidizer pump bearings in particular because of the lack of good oxidizer compatible lubricants.
- beerandt 5y agoI'm not sure how you see this as incompatible. Ball bearings require "lubrication", and the lack of good lubricants is exactly why they use fluids that end up behaving as I described, and why "lubricant" is the wrong way to think of it in this case. If anything, the existence of a good lubricant would prevent the surface wear. Temp control and fluid dynamics are what they have to work with, and yes it results in surface wear because it's suboptimal. But so does running your 4-stroke too hot.