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What are
Wheel Arrangements? |
| Wheel arrangements
describe the way bogies are configured on locomotives. The standard used
with Diesel/Electrics/etc. gives a number of axles a letter (2 axles is B,
3 axles is C) and if the axle is powered, it is given an 'o' prefix. The
following are common on QR locomotives, both electric and diesel. |
| Co-Co |
The Co-Co arrangement
consists of two bogies with three driven axles on each.
O°-O°-O° O°-O°-O° |
| A1A-A1A |
The A1A-A1A arrangement
consists of two bogies with two driven axles and one unpowered axles
on each. °O-O-O° °O-O-O° |
| Bo-Bo |
The Bo-Bo arrangement is
similar to the Co-Co arrangement except there are only two axles on
each bogie, with both being driven. O°-O°
O°-O° |
| Bo-Bo-Bo
(or TriBo) |
The Bo-Bo-Bo arrangement
adds just one extra bogie to the Bo-Bo arrangement.
O°-O° O°-O° O°-O° |
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