GWR Fishbelly Bogie Instructions

Jeremy Suter
Posts: 232
Joined: Tue Apr 14, 2009 6:56 pm

GWR Fishbelly Bogie Instructions

Postby Jeremy Suter » Thu May 24, 2018 9:45 pm

These Fishbelly Bogies come in two sizes 8' and 9' both used on Railmotors. As the 9' appears on many other GWR coaches I am making them available separately.
The Etch.
All the 180 degree folds fold outwards and all the 90 degree folds fold inwards, except the brake rod mounts which fold outwards these are also the crossbeam centralizers .

Start by removing the main section using a sharp knife on a hard board for a clean cut. then clean off any excess tabs.

Fold up the two centre beams to 90 degree.

Now fold up the sides and solder in place they should slot in the half etch slots keeping the two holes clear from solder these are for the springs to fit through later

Once soldered in place the rivet overlay can be folded down by 180 degree and soldered. The axle box keeper plate can be folded up, when fixed in place file off all the fold lines and etch cusps.

Now the centre beam can be folded down.

The bogie ends can be now fitted remembering to fold the strips to form a U shape first.

Attach both ends the centre beam should slot through the end do not solder centre at this point. keep the holes free from solder so the spring wire can be pushed through .

The Crossbeam can now be attached this has two fold down tabs on each side to fit in the open space of the top of the bogie and the eight loops should be folded up on the bogie. (This is the is the outward 90 degree fold) they should between them centralise the Crossbeam so it can be soldered in place at both end then the excess can now be filed off on the ends. Only one of the rivet overlays can be attached to the end at this point.

Turn upside down and the Brake pivot mount can be added.

The bearing mounts can now be cut out and bearings soldered in place. They fit on the side with the half etch ring they do not have to fit within the half etch (slightly smaller than the bearing rim). Once soldered in place the spring wire should be slotted through the half etch slots the large middle section should be bent in slightly to allow wire to go through and then pushed back to keep there but still able to slide on the wire.

Now nip off corners of the bottom of the bearing plates (should have done this before they were etched)

Now thread the spring wire though from the end without the overlay. Threading through the first bearing plate, the centre,and the second bearing plate to the U in the other end. Once all the way there pull back slightly and nip off the excess length then push back in. Repeat for the other side then the over lay can be soldered on to keep it in place. (Or not if you want to be able to remove the spring.)

Jeremy Suter
Posts: 232
Joined: Tue Apr 14, 2009 6:56 pm

Re: GWR Fishbelly Bogie Instructions

Postby Jeremy Suter » Sat May 26, 2018 8:32 am

Now with the main bogie built the wheels can be added, this is a tight squeeze but should run freely.

So to the brakes using the .5mm wire cut to lengths which will slide through the holes on the crossbeam.

The brakes are made of two parts soldered back to back making sure the hole and slot are clear of solder. then attach one end to the -5mm rod before slotting through the holes in the crossbeam.


When the rod is through the holes the brake on the other end can be added but do not fix to the cross beam yet.

To add the brake rigging the picture shows which way round they fit. The bracket end which connects the pull rod to the lever should be twisted to 90 degree so that it can be connected to the brake lever which has four holes in it the end that has two in is for the lever to the centre of the bogie.

The bracket should be slotted through the brakes with the short arm between the U lever mount. The wire slotted through the holes in it and the second hole in the lever, then the long arm fitted to the third hole, (if you want to remove the wheels do not connect permanently to the lever.) This should leave the forth hole clear which is for the wire to slot into and then links back to the hole in the centre bolster. (Not Shown.)

The extra levers on the etch are not required on the bogie these are for the Vacuum Cylinder workings
Once happy with the position the rods holding the mount can be soldered to hold them in position. The tie bars have been added these are slotted into the ends of the keeper plates although I had to drill out the solder in the half etch recess so the .5mm wire fits into although they should be made out of bar I will file the top slightly to make it look flat.


Phil O
Posts: 283
Joined: Sun May 05, 2013 5:23 pm

Re: GWR Fishbelly Bogie Instructions

Postby Phil O » Sat May 26, 2018 7:16 pm

Jeremy, sent me a test etch to assemble, I found it easier to fold the side frames through 90 degrees first and then carry on as per Jeremy's instructions. I was hoping to have the job sorted, before Jeremy got the production etches, but family problems and a week away have not helped. Old age has caught up with me, as my hand, eye coordination is somewhat lacking and I am spending more time on my hands and knees looking for and picking up the brake shoes.

I have a series of build photos on my phone and I will add them to this thread once I have completed the build.

I have to say that the etches are great and despite my miserable failings, the bogies have turned out square and run a treat. I have used 3.1mm brass wire to hold the the bearing etches, as that is what I had to hand.

All that is required to finish the job is suitable castings. A club member is in the market for a pair and I could do with another pair.


Phil O
Posts: 283
Joined: Sun May 05, 2013 5:23 pm

Re: GWR Fishbelly Bogie Instructions

Postby Phil O » Sun Jun 17, 2018 9:50 am

Hi All

T finished my bogies last week, but I have only just found time to download the phone and post the pictures.

Fishbelly brakes 1.jpg

Fishbelly brakes 2.jpg

Fishbelly finished.jpg

I have used a slightly different interpretation on the brake rigging which allows the wheels to be dropped without disturbing it. See the first two photos and finally the finished pair. Just awaiting the castings to complete the job, oh and build the coach to sit on them.

I have to say that they were a joy to build, I have taken a series of photos of my build, but as Jeremy has already posted his production etch seies of instruction, I will not clutter up his thread.

Thanks Jeremy.


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Re: GWR Fishbelly Bogie Instructions

Postby jsherratt » Thu May 09, 2019 2:35 pm

These bogies look splendid :thumb John

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Re: GWR Fishbelly Bogie Instructions

Postby Noel » Thu May 09, 2019 6:54 pm

Comparing the sides with the grid on the mat suggests that the bogie shown in the top photo is significantly distorted.

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