Michael Edge's workbench

[PenrithBeacon]

1 hour ago, decauville1126 said:

 

Also available from here:

 

https://www.ebay.co.uk/str/Leisure-and-Hobby?_trksid=p2047675.l2563

 

I've used them for many years for delrin chain supplies.

The link is very non-specific

 

This one is better but is still ambiguous https://www.ebay.co.uk/itm/Delrin-Chain-Sprocket-Drive-System-for-4mm-7mm-16mm-7-8-Scales-S-O-SM32-45mm-G/161623046587?hash=item25a17bf9bb:m:mDzUX9VC23BSJ-udGOILQBA

Edited February 19, 2020 by PenrithBeacon
Link added

[decauville1126]

11 hours ago, PenrithBeacon said:

The link is very non-specific

 

Left hand side, 3rd item down on menu.

[Michael Edge]

Some details of the EF1 pantograph construction, brass etch with n/s wire.

Partly completed pan on the right, the upper arms and heads are assembled on a paper pattern, the etched lower arms have the wire parallel links fitted. The file and magnet are there to hold the outer cross wire at the same angle as the inner one before assembling it all together.

Completed pan shows the etches soldered on to the cross wires, these have upper extensions to carry the springs, the lower extensions contact the roof to limit upward travel (not exactly prototypical but we have to do something) - the outer ones clearly don't reach the roof hence the need for the thin file and magnet in the previous photo.

Finally the completed loco with pans up, most of the wiring on the roof is made from flat strip mounted on insulators, these are all now included in the etch.

From the other side with pans down, small wire hooks are fitted to the rails to hold them down, again not prototypical but at least these wouldn't break the insulation. All ready to go to Dave Studley now for painting in NER lined black livery.

 

I've recently resurrected another ancient project.

I started this 7mm Hunslet 0-4-0T at least 25 years ago and it's been gathering dust (quite a lot of it actually) ever since. It's moved along a bit now, I had the smokebox door moulding from our 15" 0-6-0ST kit and I etched a few components some years ago. Clearance behind the slidebars is so tight that I've had to fit the coupling rods permanently with a recessed crankpin fastener, they will have to be painted along with the frames.

[Michael Edge]

40936 has been painted and numbered, just waiting for lining now.

Meanwhile another job under way

Any guesses as to what this might be? (BarryO keep out!)

More later.

[innocentman]

Something 1Co-Co1 and EM gauge (judging by where its sitting in your test track)?

[St Enodoc]

42 minutes ago, Michael Edge said:

40936 has been painted and numbered, just waiting for lining now.

Meanwhile another job under way

Any guesses as to what this might be? (BarryO keep out!)

More later.

 

36 minutes ago, innocentman said:

Something 1Co-Co1 and EM gauge (judging by where its sitting in your test track)?

So an EE Type 4 for Carlisle?

[Barry O]

Can't possibly comment...

 

Baz

[Richard_A]

I'd like to think it's a EM2 test etch.

[Blandford1969]

936 looks great, still keeping fingers crossed it might end up on one of your test etches. 

[Michael Edge]

3 hours ago, innocentman said:

Something 1Co-Co1 and EM gauge (judging by where its sitting in your test track)?

Full marks for spotting the gauge Andy!

[Michael Edge]

36 minutes ago, Blandford1969 said:

936 looks great, still keeping fingers crossed it might end up on one of your test etches. 

The unique tender is etched but most of the loco is not.

[Michael Edge]

2 hours ago, St Enodoc said:

 

So an EE Type 4 for Carlisle?

You win 1st prize John - can't think what that might be though!

There is a requirement for a powerful EE type 4 for the West Coast TPO which is extremely heavy and none of the rtr diesels can move it. We did have the LMS 10000/1 on it but they aren't really right and have been giving quite a lot of trouble lately. I think the heaviest Duchesses would cope but I can't get back there for the time being - should have been there most of April.

I'll put the rest of the photos on later when it's finished.

[Blandford1969]

4 hours ago, Michael Edge said:

The unique tender is etched but most of the loco is not.

Indeed. I have an Alan Gibson compound kit for the loco.

[Staffordshire]

   If I remember correctly there was a 'good' kit for a Class 40 available from Modern outline kits, 

  this obviously has not been available for a few years ....

[St Enodoc]

13 hours ago, Michael Edge said:

You win 1st prize John - can't think what that might be though!

There is a requirement for a powerful EE type 4 for the West Coast TPO which is extremely heavy and none of the rtr diesels can move it. We did have the LMS 10000/1 on it but they aren't really right and have been giving quite a lot of trouble lately. I think the heaviest Duchesses would cope but I can't get back there for the time being - should have been there most of April.

I'll put the rest of the photos on later when it's finished.

How about:

 

- Hunslet outside-cylinder 0-6-0ST 1685/1931 (you can look up the name...)

- Bagnall Port of Par 0-4-0ST

- Class 2021 0-6-0PT that really doesn't belong at Cwmafon

- all of the above

 

No rush!

 

PS I will share the prize with Fred because I didn't spot the gauge myself.

[Michael Edge]

I do have some etches for HE 1685 - and yes I did look up the name - but don't hold your breath.

[Michael Edge]

Continuing with the EE type 4

From the top with the bogie frame attached. The inner frames are 0.015" steel on my standard etched spacers, attaching them in the more or less ungluable Lima plastic wasn't easy. The wheelbase doesn't fit the chain length very well, just slightly too long but running it over something like this doesn't seem to do any harm. The motor is the Mabuchi I've been using in bigger locos for a while now, on a High Level Roadrunner gearbox driving the inner axle.

From below showing the chains. Wheels are Gibson 4844D which are on 1/8th axles to suit the smallest available sprockets (8T). The pony truck is arranged on a pivot point calculated with Baldry's rule, the lack of a gear wheel in the centre of the outer axle makes this possible. Incidentally this demonstrates why the full size loco's pony trucks are pivoted on swing links from the buffer beam - the traction motor occupies the space where the pivot should go. The Lima frames are far too wide but will be narrowed later.

Both bogies together on the test track, they ran at almost exactly the same speed, although this isn't actually vital it helps.

Unlike a lot of modern rtr the Lima loco comes apart very easily leaving this moulded floor pan. Strips of .015" n/s (handy scrap etch for this) glued into the sides and hefty (1/16" brass) pivot plates soldered in.

Bogie frames narrowed (by cutting and shutting the stretchers) and buffer beams replaced. The motors bolt on to the High Level gearbox at an angle but they have plenty of room to swing in the floor. I have put the centre steel weight back but lead sheet will be added between it and the motors, also in the nose ends - there will still be plenty of room for the DCC and sound gubbins.

All finished (apart from the bodyside window glazing) on the test track, it weighs 777g with all the lead in, can still spin its wheels and pulls my dynamometer spring out to a record 100mm. 1M44 is the southbound TPO, the other end has 1S09 for the northbound one.

[Barclay]

The Mabuchi motors look promising, although I've yet to locate one small enough for most of my projects. Still I have a couple I took out of a busted car door mirror, waiting for a larger loco to put them in. They seem quite slow, smooth running jobs. Can I ask what gear ratio you used? 

[PenrithBeacon]

1 hour ago, Michael Edge said:

Continuing with the EE type 4

...

Wheels are Gibson 4844D ...

 

Interesting! When I was looking to re-wheel my Bachmann Type 4, the AGW wheels didn't seem to fit the bill; so I went to Ultrascale

Regards

[Barry O]

Gibsons are a bit less "slippery" than Ultrascales, the Gibsons on my Lima Class 20 made a big difference in place of Ultrascales.

baz

[Richard_A]

On 18/03/2020 at 09:52, Michael Edge said:

40936 has been painted and numbered, just waiting for lining now.

Meanwhile another job under way

Any guesses as to what this might be? (BarryO keep out!)

More later.

Hi Mike

 

are these an etch which could become available to buy? I have the three silver fox sr protoypes to build one day and these would be perfect for them.

 

Kind regards-richard

[Adam]

22 hours ago, Michael Edge said:

Continuing with the EE type 4

From the top with the bogie frame attached. The inner frames are 0.015" steel on my standard etched spacers, attaching them in the more or less ungluable Lima plastic wasn't easy. The wheelbase doesn't fit the chain length very well, just slightly too long but running it over something like this doesn't seem to do any harm. The motor is the Mabuchi I've been using in bigger locos for a while now, on a High Level Roadrunner gearbox driving the inner axle.

From below showing the chains. Wheels are Gibson 4844D which are on 1/8th axles to suit the smallest available sprockets (8T). The pony truck is arranged on a pivot point calculated with Baldry's rule, the lack of a gear wheel in the centre of the outer axle makes this possible. Incidentally this demonstrates why the full size loco's pony trucks are pivoted on swing links from the buffer beam - the traction motor occupies the space where the pivot should go. The Lima frames are far too wide but will be narrowed later.

Both bogies together on the test track, they ran at almost exactly the same speed, although this isn't actually vital it helps.

Unlike a lot of modern rtr the Lima loco comes apart very easily leaving this moulded floor pan. Strips of .015" n/s (handy scrap etch for this) glued into the sides and hefty (1/16" brass) pivot plates soldered in.

Bogie frames narrowed (by cutting and shutting the stretchers) and buffer beams replaced. The motors bolt on to the High Level gearbox at an angle but they have plenty of room to swing in the floor. I have put the centre steel weight back but lead sheet will be added between it and the motors, also in the nose ends - there will still be plenty of room for the DCC and sound gubbins.

All finished (apart from the bodyside window glazing) on the test track, it weighs 777g with all the lead in, can still spin its wheels and pulls my dynamometer spring out to a record 100mm. 1M44 is the southbound TPO, the other end has 1S09 for the northbound one.

 

Good to see someone else chain-driving a 4mm diesel model. Dad's done a couple (he may have mentioned to you it at some point for all I know), a  Western and a Warship, though with single centre motor in each case. I'd reckon that your type 4 hauls better though...

 

Adam

[Michael Edge]

I've used chain drive before in 4mm models - even in 00 with a narrow gearbox. On order from PPD is an etch for driving our 6wh Steelman kit which was designed round the now defunct Bullant. One option reproduces the Bullant drive, the other uses chains which will allow some compensation.

It might be some time before I find out how well D334 works but it's had a quick trial on the dual gauge part of my fiddle yard (20ft or so). The pony trucks seem to track accurately and it runs round the 3'6" curves quite happily.

[PenrithBeacon]

On 19/03/2020 at 10:44, PenrithBeacon said:

Interesting! When I was looking to re-wheel my Bachmann Type 4, the AGW wheels didn't seem to fit the bill; so I went to Ultrascale

Regards

I remembered last night night during a wakeful period, that I bought the Ultrascales because the AGW wheels were unavailable and I got the impression, on asking at a show, that there wasn't a plan to make them re-available. It's good that you can buy them again.

[lofty.ian]

4 hours ago, Michael Edge said:

I've used chain drive before in 4mm models - even in 00 with a narrow gearbox. On order from PPD is an etch for driving our 6wh Steelman kit which was designed round the now defunct Bullant. One option reproduces the Bullant drive, the other uses chains which will allow some compensation.

It might be some time before I find out how well D334 works but it's had a quick trial on the dual gauge part of my fiddle yard (20ft or so). The pony trucks seem to track accurately and it runs round the 3'6" curves quite happily.

Hi Mike,

I would love to have given D334 a test run for you on my EM track and pointwork, but sadly I am isolated on the other side of the hills.

Lofty