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Bet you never saw a water turbine speedometer before
https://www.rypn.org/forums/viewtopic.php?f=1&t=44601		 Page 1 of 1
Author:  softwerkslex [ Sat Jun 27, 2020 9:08 pm ]
Post subject:  Bet you never saw a water turbine speedometer before
We are approaching the end of restoration of Helsingør Hornbækbanen number 4 https://veterantoget.dk/materiel/damplokomotiver/hhb4/. One of those pesky modern requirements is that we have a speedometer. HHB 4 did not originally have one, but the Danish railways did from the turn of the 20th century. We had parts from a Danish railways G locomotive for a water speedometer. These are being installed to satisfy our requirement for a speedometer. The speedometer consists of a turbine, belt driven from a drive axle, and a water column in the cab.

Attachments:
File comment: Water turbine mounted inside frames for belt drive from driving axle for supply to speedometer
HHB 4 water turbine.jpg
HHB 4 water turbine.jpg [ 264.76 KiB | Viewed 4421 times ]
File comment: In cab water column for speedometer
Speedometer cab water column.jpg
Speedometer cab water column.jpg [ 256.3 KiB | Viewed 4421 times ]
Author:  kew [ Sat Jun 27, 2020 10:55 pm ]
Post subject:  Re: Bet you never saw a water turbine speedometer before
GPS speedos unacceptable?
Author:  10stewi [ Mon Jun 29, 2020 6:50 pm ]
Post subject:  Re: Bet you never saw a water turbine speedometer before
Oh they definitely are, but they just dont fit into the interior of a 1910's steam locomotive that well. The parts are approved under the government body that regulates us, and they would have continued to sit on a shelf if we didnt decide to use them, so the decision was taken of "why not!?".

The choice was made before I became the project leader, but I will admit to being an enabler after the fact. We didn't have a speed-o plate with the right speed range on it, so I copied drawings for the right one in cad and then cast the new plate off of a 3d print.

Attachments:
IMG_7667.jpg
IMG_7667.jpg [ 309.73 KiB | Viewed 3920 times ]
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