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Old 29-06-2018, 09:59 AM   #21
Walkingthedog
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Thought I might measure one of my circuits then time 10 laps and work it out from there. But then again I probably won’t bother.
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Old 29-06-2018, 10:18 AM   #22
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Of course you could always measure the circumference of the driving wheels, video the loco whilst on a rolling road, then count the number of revolutions in a given amount of time using video editing software which will count down to 1/1000 second. Then do the sums.

Or you could opt for WTD's approach and not bother El-Oh-El
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Old 29-06-2018, 10:25 AM   #23
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I have a old tri-ang 0-4-0 which seems to break the sound barrier. Well untill it gets to a bend.
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Old 29-06-2018, 02:08 PM   #24
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Interestingly in my other life as a Radio Controlled model boater the question from kids there is also along the lines of "How fast can it go mister?" I tend to think that reinforcing this misconception by showing just how fast things can go might just be an approach that bites us in the rear?

Maybe we should be encouraging the kids to build a Metcalf kit than try to burn out a Mallard!!
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Old 29-06-2018, 08:53 PM   #25
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That's exactly the fear of half our committee - that drawing attention to Hornby Live Steams great speed will fuel the problem that afflicted it n the first place: ie owners.speeding them up too quickly and crashing.

We will make sure that the speed runs are accompanied by slow marshalling ready for the run and probably do several dummy runs asking spectators to guess the speed, building up to the high speed run.

At the end of the day there really is no such thing as bad publicity. I remember Esther Rantzen taking Everest Double Glazing to pieces and their next week was record sales.
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Old 29-06-2018, 09:31 PM   #26
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I actually had a play this afternoon with my DCC Mallard. I adjusted the decoder to give maximum speed and sent it around the outside loop. Going through my marks I very roughly estimated it took 4 seconds, so somewhere in the region of 90 mph.

Observations as follows:

1) It looked very unscale like, probably as a result of motion behaviour simply not behaving to scale.

2) I soon became very concerned that it did not derail as it went through points.

I think, as has been mentioned, a very careful approach will be necessary to ensure the locomotives remain safe. This will need to be a very well laid perfectly straight run of track otherwise we could be looking at some extreemly expensive derailments.

I returned the decoder to my normal setting (half the maximum) and decided it was not for me.

Just a point to remember, after the Mallard's record run she had to be redirected to Doncaster for repairs to her centre cylinder big end bearing, which was damaged beyond repair in the run. Speed records invariably come at a cost!
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Old 29-06-2018, 09:39 PM   #27
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So i wonder what is the point to all this.
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Old 29-06-2018, 09:45 PM   #28
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Even my few express locos running at what I would consider to represent 90 to 100 mph are probably only running at a scale speed of about 50. Look about right.
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Old 30-06-2018, 10:39 AM   #29
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Quote:
Originally Posted by brian1951 View Post
So i wonder what is the point to all this.
I think it is just a fun thread Brian.
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Old 30-06-2018, 10:48 AM   #30
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Brian........Having just read the OP I think the main reason of the post is to both get youngsters interested in live steam and secondly to show old fogies like us who are a bit sceptical weather these oo steam locos can be controlled in a realistic and controlled manner, similar as electric models can be.
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