coaster wrote: ↑18 Aug 2023, 16:42
... the balance factor seems high ....
RC211 I presume
the balance factor will be c. 100%
(much bigger than eg counterweights on inline 4 - because these aren't used for balance)
engine frequency force balance is 97% complete (and due to symmetry moment balance 100% complete)
no V5 has complete balance (only a v12 does) - V5 force balance could be complete but moment balance not
the 4 and 5 were subject to 145 kg minimum weight - but the 6 to 155 kg
EDIT with hindsight .....
yes when we know the single pin offset angle is 104.5 deg we can see there's 100% balance at engine frequency
but there's substantial imbalance at twice engine frequency (secondary imbalance) and .....
the single pin imbalance must be rather large ?