How do you set/calibrate scale speeds?

[Mustermark]

I have an iPhone app called modelspeed. www.mynabay.com.

You set the length of track you want to measure over.  Then you tap the screen at the start and tap the screen at the finish and it instantly displays the speed on the screen.

Works a treat.

On my 10ft straight I clocked my Eurostar at 130 on 75% power and my HST at 120 on full power.  Good stuff!

[Greybeema]

And to think I was hours doing that in excel. Good app. Easy to use...

[Pengi]

Thanks, just downloaded the iPhone app. The difficulty that I have with measuring the speed of the Kato trains is being able to judge when they cross the start and finish gates as they go so fast so I take an average of five measurements. No problems with the Bachfar Voyagers - they are so slow that it is easy to judge the start/stop times.