Worlds Most powerful Diesel engine - wear rate

I sure by now most of us have looked at http://people.bath.ac.uk/ccsshb/12cyl /
I was looking at some documentation on the engine builders site and
came across this: ". The cylinder liner wear rates are in the region of 0.020.03 mm/ 1000 hours maximum."
in the document: http://www.wartsila.com/Wartsila/global/docs/en/ship_power/media_publications/marine_news/2000_3/rta96c_powerful_success.pdf
That equates to about 1 thou in 42 days - I don't now much about internal combustion engines but that seems quite high. Is it because of the large bore of the cylinders that the rings can cope with a relatively large amount of cylinder and ring wear ?
Regards Tim
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Polytechforum.com is a website by engineers for engineers. It is not affiliated with any of manufacturers or vendors discussed here. All logos and trade names are the property of their respective owners.