Originally Posted by willk
Just that some RIBs plane with the bottom of their aft tubes touching the water all/most of the time. It's got nothing to do with displacement mode - they simply touch the water all the time.
Yep, I can see that some RIB's run with a small amount of tube touching at the rear...but if I increase the tube pressure from say 'a bit flat' to 'proper' am I going to gain up to 10mph and halve my fuel consumption? Nice thought...but I don't think so...
Couldn't help myself...the Humber displacement mode comment was tongue in cheek