Cuthbert Hamilton Ellis, The Beauty of Old Trains (1952) p. 117.
A tender is generally mounted on six wheels, or in some cases on two bogies, and carries a larger supply of water and fuel than can be carried by tanks and the bunker of a tank engine.
A tender, however, is so much dead-weight to be hauled, whilst the weight of the water and fuel in a tank engine contributes largely to the production of adhesion.
Thomas the Tank Engine & Friends was first introduced in 1945.
Children who adore Thomas the Tank Engine will get a thrill out of wearing Thomas the train clothing whenever they can.
If you're a parent of a Thomas fan, you know how excited your child gets when he sees Thomas the Tank Engine merchandise, whether it's toy trains, train track sets, backpacks, costumes or clothing.