Talking of Black Beetles, I have to purchase two for my projected Kitmaster Midland Pullman - and as we are going to our daughter's wedding in Oz later this year, I will be able to get them at source.
I haven't used Black Beetles before so I checked out the spec. page
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I was a little surprised by Table 2.
By my calculations, for a unit with 38mm. wheelbase and 14mm. dia. wheels (42"), the top speeds at 12v will be 84mph. with the 15:1 gear ratio, and 46mph. with the 27:1 ratio.
I would have expected a 15:1 ratio to be too low to give smooth take-up and slow running, which is important even for a high-speed train such as the Midland Pullman.
Can anyone comment on the relative merits of the 15:1 and 27:1 gear ratios as far as slow speed running is concerned?
Many thanks in anticipation.
John Isherwood.