RexAshton Posted March 5, 2019 Share Posted March 5, 2019 Hi All Can anyone point me in the direction of a 4mm drawing for a 9f please? Link to post Share on other sites More sharing options...
Steamport Southport Posted March 5, 2019 Share Posted March 5, 2019 Ian Beattie did them in B.R. Standard Locomotives To Scale. I think they were also reprinted in Railway Modeller although I don't know the date. https://www.amazon.co.uk/British-Rail-Standard-Locomotives-Scale/dp/0851533906 I've a feeling they were also printed in this. But I'm not 100% certain. https://www.amazon.co.uk/Drawn-Described-Collection-Locomotive-Accompanying/dp/0900586907 There was also very good drawings to 7mm scale in Your Model Railways. Shows a lot more detail. http://magazineexchange.co.uk/cw/model-railways-magazine-march-1986-issue.html Jason 1 Link to post Share on other sites More sharing options...
RexAshton Posted March 5, 2019 Author Share Posted March 5, 2019 Thanks Jason. That's a big help. Link to post Share on other sites More sharing options...
JeffP Posted March 5, 2019 Share Posted March 5, 2019 I have a copy of the former, if it's of any use? PM me. Link to post Share on other sites More sharing options...
RosiesBoss Posted March 5, 2019 Share Posted March 5, 2019 G'day, all, These BR diagrams may also be of help: http://www.barrowmoremrg.co.uk/BRBDocuments/British_Railways_Standard_Locomotives_JDF_Issue.pdf Regards, Rob 2 Link to post Share on other sites More sharing options...
RexAshton Posted March 6, 2019 Author Share Posted March 6, 2019 16 hours ago, RosiesBoss said: G'day, all, These BR diagrams may also be of help: http://www.barrowmoremrg.co.uk/BRBDocuments/British_Railways_Standard_Locomotives_JDF_Issue.pdf Regards, Rob Thanks for the info. They'll need rescaling but I'm sure I can manage that. Link to post Share on other sites More sharing options...
RMweb Gold RedgateModels Posted March 6, 2019 RMweb Gold Share Posted March 6, 2019 beware of Beattie drawings though, you really need to check the real thing especially details Link to post Share on other sites More sharing options...
RexAshton Posted March 6, 2019 Author Share Posted March 6, 2019 6 minutes ago, RedgateModels said: beware of Beattie drawings though, you really need to check the real thing especially details Yeah I've heard that one. I've got loads of photos though. The drawing is mainly to asses the best gearbox and where to put decoder, speaker etc. 1 Link to post Share on other sites More sharing options...
RMweb Gold RedgateModels Posted March 6, 2019 RMweb Gold Share Posted March 6, 2019 Dimensionally the Beattie 9F is fine as far as I can remember. The inclusion of the blower pipes and ducting and the omission of the top feed on the LHS of the Crosti was his most obvious mistake on the 9Fs Link to post Share on other sites More sharing options...
34theletterbetweenB&D Posted March 6, 2019 Share Posted March 6, 2019 11 minutes ago, RexAshton said: ...The drawing is mainly to assess the best gearbox ... It is possible to drop a gear train vertically through the firebox with the centreline between fourth and fifth axles, and turn the drive ninety degrees forward onto the fourth axle, all fully concealed. I long ago did this using a 'Branchlines' gearbox plus extender, and it has worked beautifully ever since. Probably several alternative gearbox products now. (Never having looked at a Hornby loco powered 9F I imagine this is similar to that model. I was rather puzzled that the otherwise well thought out Bachmann has a visible drive line.) 1 Link to post Share on other sites More sharing options...
RexAshton Posted March 6, 2019 Author Share Posted March 6, 2019 3 hours ago, 34theletterbetweenB&D said: It is possible to drop a gear train vertically through the firebox with the centreline between fourth and fifth axles, and turn the drive ninety degrees forward onto the fourth axle, all fully concealed. I long ago did this using a 'Branchlines' gearbox plus extender, and it has worked beautifully ever since. Probably several alternative gearbox products now. (Never having looked at a Hornby loco powered 9F I imagine this is similar to that model. I was rather puzzled that the otherwise well thought out Bachmann has a visible drive line.) Thanks for that. The plan is Mashima 1424 motor (more than enough power for what it will be pulling), High Level gearbox and flywheel if there's room. Got to fit sound somewhere as well but there should be plenty of room. 1 Link to post Share on other sites More sharing options...
34theletterbetweenB&D Posted March 7, 2019 Share Posted March 7, 2019 14 hours ago, RexAshton said: The plan is Mashima 1424 motor (more than enough power for what it will be pulling), High Level gearbox and flywheel if there's room. Got to fit sound somewhere as well but there should be plenty of room. Space wise, there's a ton of room. I'd fit an 1824 if you can get one as there's ample width in the firebox and boiler end, then moving forward weight in the bottom half of the rest of the boiler with the decoder on top, speaker in the smokebox. (Conversion to loco drive of the old Hornby 9F with an 1830 and packing most of the rest of the body with lead, made for a 600g loco with the balance point on the centre driver, and still left room for later fitting of Lenz Silver decoders. Tractively superior to the Bachmann, although this was 'overkill', a legacy of my long past habits developed for an outdoor OO operation where plentiful traction is king. Watch that modest breeze stop a train of mineral empties...) 1 Link to post Share on other sites More sharing options...
nzgresleyfan Posted March 7, 2019 Share Posted March 7, 2019 There was a good article in one of the early Model Rail editions as well. I have a copy somewhere and can look it up if you'd like to know which one. Link to post Share on other sites More sharing options...
cctransuk Posted March 7, 2019 Share Posted March 7, 2019 1 hour ago, 34theletterbetweenB&D said: Conversion to loco drive of the old Hornby 9F with an 1830 and packing most of the rest of the body with lead, made for a 600g loco with the balance point on the centre driver ... This is how I intend to do it - loads of room for tractive ballast !! Regards, John Isherwood. 1 Link to post Share on other sites More sharing options...
RexAshton Posted March 7, 2019 Author Share Posted March 7, 2019 36 minutes ago, cctransuk said: This is how I intend to do it - loads of room for tractive ballast !! Regards, John Isherwood. Looks like the business. Weight isn't an issue of course with the DJH kit as its got a one piece whitemetal boiler. Link to post Share on other sites More sharing options...
PenrithBeacon Posted March 7, 2019 Share Posted March 7, 2019 3 hours ago, cctransuk said: This is how I intend to do it - loads of room for tractive ballast !! Regards, John Isherwood. Presumably that would work with a Britannia too Link to post Share on other sites More sharing options...
cctransuk Posted March 7, 2019 Share Posted March 7, 2019 1 hour ago, PenrithBeacon said: Presumably that would work with a Britannia too Can't see why not. Regards, John Isherwood. Link to post Share on other sites More sharing options...
34theletterbetweenB&D Posted March 7, 2019 Share Posted March 7, 2019 2 hours ago, PenrithBeacon said: Presumably that would work with a Britannia too But keep in mind the driven axle is centred 2.3mm higher relative to the firebox top, so the top motor bush housing may foul, and the bottom of the gear box will be close to the truck pivot. The more conventional arrangement of motor shaft parallel to boiler axis will equally work because there isn't the significant clear air gap between frame tops and boiler underside on the Brit, so you can drop the gear train vertically directly onto the axle. Motor ahead of gearbox then leaves pretty much equal spaces fore and aft for weight. Added inducement if using DC power: socking great flywheel can be employed. Link to post Share on other sites More sharing options...
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