Blue Thunder
7,000 centigram ProTractor class
.
.
9,000 centigram Pro Tractor
class.
Same as above except
set up for higher
(heavier)
class. (action photo)
.
.
11,000 centigram Pro Tractor
class.
Again, note the set up.
Each 'Dummy Motor' is full
of lead and added as needed for weight to
make each class.