 | The contents of the Momentum wheel page were merged into Reaction wheel and it now redirects there. For the contribution history and old versions of the merged article please see its history. |
I have never heard about this distinction between "Momentum wheel" and "Reaction wheel" I think these are just two names for the same thing. The only reason to avoid zero (or low) rotation rate is possible lubrication problems. Do you really mean that "Reaction wheel" are those having no lubrication problem at low revs?