Re: Mini 1948 Trials Southern Style

Christopher A. Lee <calee@optonline.net> wrote:
> beamendsltd <beamendsltd@btconnect.com> wrote:
>>          Chris <nospam@nospam.com> wrote:
>>
>>> Having just replaced the magnet in my Wrenn unrebuilt BoB bulleid
>>> pacific with a Neo magnet I thought I'd do a haulage trial on my 1
>>> in 28 helix. The Wrenn loco could haul an 8 car train up the helix
>>> but could not start it, would keep going with a push start. The
>>> unrebuilt modern BoB Hornby loco would just slip its wheels even
>>> with a push start would slip to a halt. The rebuilt Hornby BoB could
>>> start the train with a little slippage unaided and pull the train up
>>> OK.
>>>
>>> Conclusions Hornby have managed to imitate life with better haulage
>>> of their rebuilt over the unrebuilt. Despite the weight advantage of
>>> the Wrenn over Hornby the Hornby rebuilt still has better haulage
>>> capacity. So must be down to a better motor and less losses in the
>>> transmission. Good to get the Wrenn performing well again though. As
>>> an aside I was surprised at the haulage capacity of the Hornby Q1
>>> when I had done trials with that before, disappointed with the M7
>>> though.
>>>
>>> Test was conducted with 3 Bachmann bulleid coaches, 3 Hornby mk2a
>>> coaches, 1 Lima mk2b and 1 Airfix mk2d. All three locos were running
>>> on DCC at @ 18V AC on DVM.
>>
>>It's most likely down to torque, or more accurately torque applied
>>*smoothly* at the right speed - just like the real thing really.
>>Any "snatchiness" starts a slip, and once slipping you've had it.
>>
>>It's always a good laugh at an off-road trial watching the new kids
>>on the block with their fully tricked-up 300hp motors getting
>>slaughtered by a 1949 56hp 1.6L Series One's until their drivers
>>realise power has very little to do with it, a gentle right foot is
>>always best, but if the vehicle does not have high torque at low revs
>>they ain't going anywhere.
>
> I once had a ride in a Stanley Steamer. Its starting torque was
> amazing. But that's steam for you.

Steam cars can be surprisingly fast, and quiet. They were a bunch of
them at Camborne, Cornwall on Trevithick Day in April, along with a wide
assortment of other steam-powered vehicles including a ex-GWR tank loco
(in light steam and sitting on rails, but not mobile).

--
Martin S.
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