Talk:Sagebien wheel

Efficiency
An efficiency of 103% is not excellent, it is impossible. That is fundamental physics.

The other efficiencies quoted are dubious. Most sources I have come across give an efficiency for breast shot wheels in the 50 to 60% region.

Care is needed to distinguish between pre and post C18 designs when making comparisons. It is not always clear what is being compared with which.

Malcolm Boura (talk) 22:16, 8 March 2017 (UTC)