Rebuilt Crosti 9f

[spikey faz]

might see you at Kempton then Mike

Kempton???

 

[chigley]

southern o gauge show

 

[spikey faz]

I'm hoping someone here can help with yet another query. I'm trying work out the route for the exhaust ejector pipework. Close-up pictures of this on the prototype seem to be non-existant.


Thanks
Mike

 

[Dave Holt]

Mike,
I'm not sure I have understood your query correctly. The photos show the brake ejector and, as far as I can make out from published photos, the train vacuum pipe runs above the footplate, as per your photos, to the reversing gear box. Beyond that, I suspect it runs below the footplate, out of sight, till it emerges at the cab and then follows the same route as the standard locos.
Regarding the large diameter exhaust steam feed to the exhaust injector, after removal of the Crosti pre-heater, it appears to have been re-routed similar to the standard locos. After sloping up and behind the footplate, in front of the cab, it then turns down (about 45 degrees) and inwards, between the 4th and middle axles' It then runs forward, along the loco centreline, on top of the horizontal frame stretchers.
Not precise details, but hope it helps.
Dave.

 

[spikey faz]

Mike,
I'm not sure I have understood your query correctly. The photos show the brake ejector and, as far as I can make out from published photos, the train vacuum pipe runs above the footplate, as per your photos, to the reversing gear box. Beyond that, I suspect it runs below the footplate, out of sight, till it emerges at the cab and then follows the same route as the standard locos.
Regarding the large diameter exhaust steam feed to the exhaust injector, after removal of the Crosti pre-heater, it appears to have been re-routed similar to the standard locos. After sloping up and behind the footplate, in front of the cab, it then turns down (about 45 degrees) and inwards, between the 4th and middle axles' It then runs forward, along the loco centreline, on top of the horizontal frame stretchers.
Not precise details, but hope it helps.
Dave.

Thanks Dave.

Re the brake ejector, your thoughts concur with mine.

I hadn't got as far as the other assorted pipes. I'll have to read up later on the 'exhaust steam feed pipe'. Another voyage of discovery for me!

Cheers
Mike

 

[chigley]

Mike, iv'e gone through all my books and i agree with Dave, it looks like it disappears behind the reverser and merges in with the other pipes on the other side. If you google steamworkshop. co uk there is a fantastic 5" gauge crosti boilered model 922024, with some detailed photo's
inc sand boxes etc, happy modelling

Ken

 

[Dave Holt]

Mike,
Here's the cheat I used on my 4 mm 9F. Only the visible bit of the exhaust injector feed pipe was modelled, where it swoops down from behind the footplate in between the frames.

On the other side, it forms part of a cluster of pipes coming from the two injectors. In my model these are permanently attached to the chassis.

Dave.

 

[spikey faz]

Mike,
Here's the cheat I used on my 4 mm 9F. Only the visible bit of the exhaust injector feed pipe was modelled, where it swoops down from behind the footplate in between the frames.
View attachment 181592
On the other side, it forms part of a cluster of pipes coming from the two injectors. In my model these are permanently attached to the chassis.
View attachment 181594
Dave.

Extremely useful pictures. Thank Dave.
Mike

 

[spikey faz]

I've made a start (finally!) on the pistons and con-rods. Need to fine tune the alignment, but seems all OK - more Ragstone parts to supplement the kit-supplied parts.


Mike

 

[OzzyO]

Hello Mike.

it's daft question time, why are you throwing paint on the frames when you may have some parts to solder to them?
I know that you can see imperfections better with a coat of paint on but it also just makes it a pain to work with.

Nice looking build keep up the good work.

ATB

OzzyO.

 

[spikey faz]

Hello Mike.

it's daft question time, why are you throwing paint on the frames when you may have some parts to solder to them?
I know that you can see imperfections better with a coat of paint on but it also just makes it a pain to work with.

Nice looking build keep up the good work.

ATB

OzzyO.

Hi OzzyO

It's a very good question. Basically trying to suss out imperfections (of which there will be many!). I did the same with the boiler/firebox/smokebox and most of the paint has since disappeared. I guess the same will happen with the chassis as no doubt there will be many more ammendments. Don't worry, its all under control!

But thank you for the compliment. After a year in construction this project needs a boost.

Mike

PS. Looking at the diminished pile of parts I wonder how much more I have to or need to add to the chassis.

---

 

[chigley]

Hello Mike, i had a look at the rebuilt one scorpio's stand but it hasn't got a lot of detailing parts on it, sand boxes pipework etc
but it looks like it's coming along nicely

Ken

 

[spikey faz]

One step forward....many steps backwards. The front access cutouts in the running plate don't appear to align with the corresponding chassis components. I noticed this anomaly early on in my build but only now have I had to address it. It could be down to my shonky construction methods, but I've noticed it in pictures of another crosti build I found on the Internet a while back. So, lots of filling in, to be followed later by lots of cutting out, drilling etc.

I've also had a look at the steam manifold and associated whistle castings (Ragstone again). Looking good, but I'll need to do a little bit of cutting and shutting to get everything to align properly.

Mike

 

[spikey faz]

Steam manifold after modification.

Mike

 

[spikey faz]

I thought I'd have a go at refining the smokebox door.

Hacked off all the securing clips and most of the hinge mechanism.

Looks a bit better and I've got some replacement clips to add once the door is in place on the smokebox.

Mike

 

[spikey faz]

I've also added the cylinder vaccum valves. The upright pipes that the valves are attached to are hidden from view, so I'm not too fussed about their appearance, as you can tell!



Mike

 

[spikey faz]

Having spent over a year building the Crosti (and still not finished!) I've got a bit more familiar with the overall shape of the prototype. One thing which has always bugged me is the cab roof profile. Basically it's wrong. So today I went to work and left it looking like it had been attacked by a can-opener.


Soldered in some brass section to reinforce what's left of the roof.

New roof in place. The join looks a but messy, but I'm much happier with the overall profile. It matches up with the tender much better.


I'll add the roof ventilator and rain strips later.

Mike

 

[spikey faz]

And I've got the tender-to-loco buffers fitted. I couldn't find any small springs that were soft enough, so I've improvised with a bit of springy wire.






The tender-to-loco coupling is something I may or may not re-visit in due course. It works well, but it doesn't look right.

Mike

 

[spikey faz]

Here's a couple of pictures to show what I ended up doing to the cab roof. Precision engineering it ain't! Note hefty brass beams to impart some rigidity to the roof. I still need to tweek the gaps front and rear before final filling/soldering.



The overall profile is still not quite right, but any more 'adjustments' would entail a total rebuild, and I'm not up for that. It's still a lot better than it was though.

I've still got the rear rain-strip to do. I've been using some L section brass strip which I've had kicking around for years to do these and I've got just enough to finish the roof off. However, if I mess it up does anyone know where I can get hold of some more? Here's a pic of the packaging it came in.

Crucially it's 0.8mm. I can get hold of 0.5mm and 1.0mm, but 0.8 is somewhat elusive.

Mike

 

[chigley]

Phil at Hobby Holidays, looking good Mike

Ken