![rail - What is the purpose of these “partially filled in” locomotive wheels? - Engineering Stack Exchange rail - What is the purpose of these “partially filled in” locomotive wheels? - Engineering Stack Exchange](https://i.stack.imgur.com/JbStW.jpg)
rail - What is the purpose of these “partially filled in” locomotive wheels? - Engineering Stack Exchange
![South Western Railway on X: "#Wheels of the #train go round, round , round.... Symbolising the #mobility Railway stands for Wheels of trains powered by #Locomotive keep on moving in Rain, shine South Western Railway on X: "#Wheels of the #train go round, round , round.... Symbolising the #mobility Railway stands for Wheels of trains powered by #Locomotive keep on moving in Rain, shine](https://pbs.twimg.com/media/Ek7WTmfU8AECc-W.jpg:large)
South Western Railway on X: "#Wheels of the #train go round, round , round.... Symbolising the #mobility Railway stands for Wheels of trains powered by #Locomotive keep on moving in Rain, shine
![The elements of railroad engineering . 340 ELEMENTARY MECHANIC^;. 5)31. Vliccl>vork.—A combination of wheels and axles,as in Fig. 1-i-i, is called a triiiii. The wheel in a train towhich motion is The elements of railroad engineering . 340 ELEMENTARY MECHANIC^;. 5)31. Vliccl>vork.—A combination of wheels and axles,as in Fig. 1-i-i, is called a triiiii. The wheel in a train towhich motion is](https://c8.alamy.com/comp/2CNC3TM/the-elements-of-railroad-engineering-340-elementary-mechanic-531-vlicclgtvorka-combination-of-wheels-and-axlesas-in-fig-1-i-i-is-called-a-triiiii-the-wheel-in-a-train-towhich-motion-is-imparted-from-a-wheel-on-another-shaftby-such-means-as-a-belt-or-gearing-is-called-the-drivenwheel-or-follower-the-wheel-which-imparts-the-motionis-called-the-driver-fig-144-932-it-will-be-seen-that-the-wheel-and-axle-bears-thesame-relation-to-the-train-that-the-simple-lever-does-to-thecompound-lever-that-is-the-continued-product-of-tite-powerand-the-radii-of-the-driven-wheels-equals-2CNC3TM.jpg)
The elements of railroad engineering . 340 ELEMENTARY MECHANIC^;. 5)31. Vliccl>vork.—A combination of wheels and axles,as in Fig. 1-i-i, is called a triiiii. The wheel in a train towhich motion is
![Why do steam engine wheels have these hemisphere bits parallel to the coupling rods? Why are some bigger than the others? : r/trains Why do steam engine wheels have these hemisphere bits parallel to the coupling rods? Why are some bigger than the others? : r/trains](https://preview.redd.it/4ss34tak8yw81.jpg?width=640&crop=smart&auto=webp&s=5c524ec86acf9c711a6bed0f0f504fd99d901b80)