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Post by Cro on Oct 16, 2018 7:54:13 GMT
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Post by Deleted on Oct 16, 2018 8:24:27 GMT
I have similar sleeving covering my car's engine loom wiring....only similar I might add..mine is blue but more importantly rated for 1200 F protection against heat...yep...1200 F... Pete
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Post by Cro on Nov 4, 2018 20:03:06 GMT
This is partly last Sundays update and todays update. I never got round to uploading what I did last weekend as it's been a rather busy week at work and sadly I can't see if letting up any time soon! I just had a quick look back at when I started the 3 7 1/4" gearboxes, December last year!!! Not good, I know its been a busy year and just shows how long it takes me to get through some of these jobs but must get faster on some of these. Either way, a good couple of Sundays on in the workshop (with some company) has seen good progress on these. Untitled by Adam Cro, on Flickr This was the set of parts back at the beginning of the job. Untitled by Adam Cro, on Flickr A lot of parts in these especially when you include all the studs and nuts to assemble them all together. I am trying to improve the design as I go with them and make sure they are super reliable and run really smooth. Last Sunday I started on the main spindles which incorporate the worm gear, this spindle is cast with the gear on it which is turned between centres before fitting the semi machined bevel gear. This is then turned to the right Dia. to keep everything concentric. This is where I ended up last Sunday with 2 out of 3 done and worm gear and indicator dial all assembled and running well, a few tight spots but this is fettling of the cast gears to get things a bit smoother. Untitled by Adam Cro, on Flickr Today was a slower day as I managed to ruin the first spindle right on the final operation, luckily I had a spare casting but this also meant machining a new bevel gear - luckily I have these too! I also found the casting wasn't quite perfect internally as it had a lump where there shouldn't be one which interfered with the worm gear. If I had noticed this earlier I could have bored it when I first machined the casting when set up in the 4-jaw. After all the messing around I finally got the 3rd spindle in and started tidying all the gears. Untitled by Adam Cro, on Flickr It's now down to all the little fitting jobs, tidying up and running in prior to painting and fitting all the studs. I also did a little tidy up on the 9f firebox cladding, all this corner needs now is to trim to shape over the backhead plate. Onto the cab next whilst I work out the new regulator, super-heater and front end plumbing set up. by Adam Cro, on Flickr Adam
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Post by Deleted on Nov 4, 2018 20:12:34 GMT
looking great Adam...I'm sure that your grandfather would be very proud of the improvements you've done to the loco...very nice sir.. Pete
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Post by Cro on Nov 12, 2018 21:32:41 GMT
Another Sunday in the workshop, I must be doing something right! Gearboxes ticking over nicely, 1 assembled and run in, 2 to go now then its clean paint and assemble fully. Untitled by Adam Cro, on Flickr I had it running in the lathe to run the gears in, Flickr won't take it as its a "slow mo" but here is the link to Facebook to see it. I also managed some time on the 9f for once. Final tidy up on the firebox cladding and back onto the cab floor structure although it didn't go to plan it was always going to be a test piece. The aim was to silver solder the majority so that I could then soft solder the chequer plate to the final assembly. I had decided to use a 0.5mm brass plate to keep the thickness correct when second plate soldered on top but this in the end has just made life damn hard. I tried clamping it to a steel plate but couldn't get the heat right and the brass buckled all over the place. Untitled by Adam Cro, on Flickr Next plan is to make a new one in 1mm steel and then start again on the cab floor structure as now all the bits I had previously done are stuck to the bodged effort. Here's how it looks when not looking too close. Untitled by Adam Cro, on Flickr Untitled by Adam Cro, on Flickr I also found some old photos of me driving at Beech Hurst, enjoy! Untitled by Adam Cro, on Flickr Untitled by Adam Cro, on Flickr Off to Switzerland tomorrow with work for the rest of the week! Nice 10 hour drive in the van at least I'm not alone though. Adam
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Post by Jim on Nov 12, 2018 22:43:04 GMT
Love that last photo Adam what a way to travel behind a Britannia Have a safe trip.
Jim
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Post by Cro on Nov 13, 2018 20:42:36 GMT
Jim,
It's rather lovely that Brit, sadly now in the hands of another owner with less knowledge and it's many pieces. I keep trying to persuade him to sell it to me so I can return it to its former glory!
Currently sat in a Thai restaurant in Switzerland!
Adam
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Post by Jim on Nov 15, 2018 4:01:21 GMT
That's sad when once fine models pass into the wrong hands. I can appreciate you sense of frustration. That table on the last car looks suspiciously like one of the teacher's desks the Dept. used to supply back in the 'good old days'
Jim
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Post by 92220 on Nov 15, 2018 13:56:48 GMT
Hi Adam. Good to see the progress. The 9f is coming along well too. As far as the buckling of the brass chequer plate goes, I think it is probably down to the difference in thermal expansion/contraction between the steel parts and the brass plate. When I soldered the steel chequer plate in position, I strongly jigged everything to prevent it moving, but still used soft solder to keep the heat down over such a large area of relatively thin material. I did get a small amount of buckling at the one edge, but when it all cooled, the very minor buckles sorted themselves out. When you get around to working on the wooden floor boards, get hold of some thin sycamore boards off ebay. You can machine it almost like metal and there is almost no need to do any tidying up after machining. It is possible to work to +/- 0.001" too!! You do need brand new HSS cutters, NOT carbide, as they are generally not as sharp, initially, as new HSS. I always set up so that I was cutting with the peripheral flutes, like a planer, not the end of the cutter. I'll tidy the wood floor drawing up, and get it over to you.
Bob.
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Post by Cro on Nov 26, 2018 11:41:55 GMT
Another Sunday in the workshop and a productive one too! Still on the gearboxes, almost done now only a few o-ring grooves left to add to a few spindles and they are ready for strip and paint. All running quite well now, one needs some minor fettling before I'm 100% happy with it. Untitled by Adam Cro, on Flickr As you'll see one of them is slightly different from the rest having a universal coupling attached. This was a customer request to allow him to fit a crank handle out the back of the cab and use the gearboxe easier as these are notorious for being fiddly in scale cabs. Even in 7 1/4" these can be tricky to operate. I made a simple bronze bush to replace the end cap which allows a mild steel spindle to be screwed onto the end of the main drive shaft, I will screw this on and cross pin it to ensure it can't come undone in use. Untitled by Adam Cro, on Flickr Untitled by Adam Cro, on Flickr The next photo will make our man Don happy as I have the 5" Gresham & Craven Steam brake valves on the bench ready to go, one has been started in both gauges but the first one onto the Myford will be Don's Mk6 style brake valve that I researched and drew up specially for the job. They are very satisfying to machine up so I hope to start on these once the gearboxes are being painted. Untitled by Adam Cro, on Flickr Untitled by Adam Cro, on Flickr Untitled by Adam Cro, on Flickr The castings look a bit naf in these close ups but you have to remember how small they are and how tiny some of the detail really is. Finally some work on the pedestals, the 9f one is now painted awaiting the valves to be fitted and that will go with one of the gearboxes as will the Std Class 5 when they are all done. Untitled by Adam Cro, on Flickr Hopefully more again next week! Adam
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Post by Deleted on Nov 26, 2018 11:52:54 GMT
looking good Adam... don't forget to let me know if any LNER fittings are coming up... also I will need to take a close look at those steam valves at some point before committing Paul to the backhead layout
regards
Pete
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Post by Cro on Nov 26, 2018 12:05:42 GMT
Pete,
Of course, I do have a pair of them at home so maybe best I pop them in the post and you can have a look and maybe coincide with a chat/meet up with Paul to have a look. As I said before I think best used as just a steam valve with a delivery clack hidden somewhere else.
Adam
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Post by Deleted on Nov 26, 2018 12:41:57 GMT
Sounds like a plan.. no rush... Paul will let me know when he's about to start.. perhaps we can meet at his works then to work out what's best. IIRC he's based in Camberley which isn't a million miles away. I was looking at your valves, I think they may need modifying as I can't see how it's possible to put an external thread on them. It then dawned on me that the best way would be to remove the part for the external thread, drill and tap to accept the required threaded stubs. The 'C' nuts would need to be to very close to scale to fit... a little R&D will be required to see what's best.... leaving the big question, rectangular pads or not?. I'm still in two minds on this, this will, of course, need to be decided before Paul gets too far into the build.. I foresee exciting times ahead.. Regards Pete
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Post by Cro on Nov 26, 2018 13:24:12 GMT
Pete, Way ahead of you..... Capture by Adam Cro, on Flickr Solder in the threaded fittings which I do on a lot of fittings. Adam
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Post by Deleted on Nov 26, 2018 13:40:47 GMT
aha.. cool.. nice one mate....
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Post by 92220 on Nov 26, 2018 20:49:11 GMT
Lovely work Adam! I am just cleaning up the cab floor underframe drawings and will get them off to you tomorrow (Tues). I should have the wooden floor drawing sorted as well and hopefully that will be there too. It will be interesting to see how it all compares with your interpretation of the BR drawings.
Seeing your photos of the castings is making me drool, and want to get on with machining mine, but I and resisting it until I have the boiler on the frames to have somewhere to fit them when finished!!
Bob.
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Post by Deleted on Nov 26, 2018 21:06:29 GMT
. Seeing your photos of the castings is making me drool, and want to get on with machining mine, but I and resisting it until I have the boiler on the frames to have somewhere to fit them when finished!! Bob. I feel the same Bob, can't wait to have a boiler on the frames, then I can play at making fittings...hope to get the motion and cylinders finished before then though... Pete
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Post by Cro on Nov 26, 2018 21:15:03 GMT
Thanks Bob, look forward to seeing the drawings as I need to complete my model before I carry on with that really. I have a fear my cab floor is sat too low but I think May just be the boiler so also need to look at cab sides too before I commit to much more.
Look forward to seeing boilers on both your frames chaps! Look forward to getting these two locos side by side one day.
Adam
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don9f
Statesman
Les Warnett 9F, Martin Evans “Jinty”, a part built “Austin 7” and now a part built Springbok B1.
Posts: 960
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Post by don9f on Nov 26, 2018 23:41:26 GMT
Hi Adam, great news about the Mk6 👍 I’ve every intention of carrying on with the 9 this winter when I’ve finished a few DIY jobs, plus the signal that’s now nearly done!
Cheers Don
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Post by Cro on Nov 27, 2018 6:49:44 GMT
Don, I'm working as hard as I can to get to it next and complete mine and a few others along side it.
Just debating best way to paint the gearboxes in most efficient fashion and I feel actually doing them assembled is best as all the studs & nuts will be in place. I see no benefit of painting the bits seperatly and assembling them and then touching in all the nuts and studs after. Any thoughts guys?
Adam
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