Author Topic: Anyone for the "Tube"?  (Read 4619 times)

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Offline LankyTank

  • G3 Society Member
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  • Old enough to know better, but I don't care.....
Re: Anyone for the "Tube"?
« Reply #15 on: Sep 02 2019 15:58 »
John

An enquiry to Peartree Engineering a.k.a Model Railway Parts on either 01379 608000 or info@modelrailwayparts.com might bear fruit (sorry, no pun intended..... oh, go on then....)

www.modelrailwayparts.com/


HTH
Barry

Offline John Branch

Re: Anyone for the "Tube"?
« Reply #16 on: Sep 02 2019 16:46 »
Thanks, Barry, I'll let you know.

John

Offline IanT

Re: Anyone for the "Tube"?
« Reply #17 on: Sep 02 2019 23:04 »
Hi John,

Re: my recent post about cast iron pulleys...

"They are just under 44mm in total diameter with a thickness of 10mm. I think (for use in G3) the maximum scale tread possible would be about 2ft 8" (bottom of pulley groove is 37mm) so you could probably get a turned tread of 36mm, one side of the pulley wall acting as a flange. So not big enough for standard gauge wagon wheels...."

So that might be a possible source of materials, maybe you just need someone (Walsall?) to machine them for you.

Regards,

IanT
Nothing's ever Easy - At least the first time around.

Offline John Branch

Re: Anyone for the "Tube"?
« Reply #18 on: Nov 22 2019 13:05 »
Not sure whether to post here or on the more recent thread on choice of motors, but as my latest project is for power bogies for LT 1938 tube stock, I thought this was the best place.  Photo attached is first mock up of the closest I have yet come to an axle hung design.  It uses a pair of unidentified , but identical, motors salvaged from the wreckage of a Canon inkjet printer. Subjectively, it seems to deliver enough ooomph to do what I want, although it will be a few months yet before this is demonstrable.  As in the prototype there will be one motor per bogie, thus 2 per car.  My hope is that there will be enough power to haul a dummy motor car ( or even 2 trailers) to make a train of it.  I have no idea what the rated power/voltage of the motors are, but as some probing with a meter before final destruction of the printer revealed, the power supply seemed to deliver +12v-0--12v.
Next milestone is a running bogie, will keep you posted

John





Offline John Branch

Re: Anyone for the "Tube"?
« Reply #19 on: Mar 17 2020 10:19 »
Further to my previous posts, the attached photos show one complete-ish and one bare bogie for the 1938 stock motor car.  I have most of the MEL-cut parts for two bodies and another set of bogies, so that answers the question about what I will be doing during the "Great Isolation of 2020"

John

John




Offline John Branch

Re: Anyone for the "Tube"?
« Reply #20 on: Aug 18 2020 17:03 »
Since March (can it really have been that long ago?), I have been through that process that a lot of us have experienced, from concept to reality.  It is never until the end that we discover whether it was all worth while.  I am nearly there-probably a month or 2 away-and have something to show for it..  I have a running 38 tube stock driving motor car, and it is quiet, smooth and fast.  It needs a lot of finishing work and something to pull.  The something will be an identical car sans motors.  The reason I went so far with the first one was to assess if it had the strength to pull a dummy.  It does, and so the dummy is coming along.  The photos are not quite up-to-date, as I am still working on getting the roof to fit before it is revealed to the membership.
John






Offline IanT

Re: Anyone for the "Tube"?
« Reply #21 on: Aug 18 2020 18:09 »
Looking good John!   :)

Regards,

IanT
Nothing's ever Easy - At least the first time around.

Offline Traininvain

Re: Anyone for the "Tube"?
« Reply #22 on: Aug 18 2020 19:30 »
Looking brilliant!

Ever since I saw the large scale model tube train shuttling up and down above the main gallery at the London Transport Museum I've fancied one of these.

Fantastic!

Ian