Mayner Posted May 3 Share Posted May 3 (edited) I designed a fret for converting the SSM/TMD kit into the Z Boilered superheated version of the loco about 10 years ago. I assembled two J15s from TMD kits during the 80s-90s picked up a part built kit at Expo EM about 20 years ago and bought a further two kits from Paul Greene shortly before he sold the business to Des Sullivan during the late 2000s. Apart from the MM 201 and repaints of BR stock reasonable rtr models of Irish locos and stock were virtually unknown and apart from the SSM/TMD available kits were nothing to write home about. Although mainly interested in the Midland I basically gave up on scratchbuilding during the 80s and I was planning to build a model of Kiltimagh and the J15 were the staple motive power on Burma Road goods trains so I ended up with 5 J15s and decided to build one as a superheated loco to add variety. The original fret was very simple basically heavier main frames fitted to some locos by the GSR smoke box and firebox parts and a new spectacle plate. Additional parts were included to replace the fragile brake gear and reversing rods and Belpaire firebox formers similar to that used in the Y Boiler version of the JMD 650 Class kit. Although I gained considerable experience in designing loco and rolling stock kits over the past 10-12 years, I ended up with a 12 item snag list after I completed the test assembly of the firebox, boiler and smokebox after I converted a 2D design into a 3D object. The first boo-boo was forgetting to attach the half etched smokebox wrapper to the main fret and I appear to have "disappeared" a copy of the original fret complete with wrapper! The main design change in design from the original fret is to include a former/jig for forming the firebox and bolt together assembly of the three main sub assemblies. I removed the center section of the former/jig once I soldered the wrapper in place. I was reasonably satisfied with the fit of the wrapper, though those fragile sandbox rods are a pain! The cab and running board for the loco were assembled about 10 years ago! I have designed the firebox-boiler-smoke box to bolt together using 10BA bolts. There may be variation in the diameter of boiler wrapper in individual kits supplied by TMD and SSM, the kits supplied by Terry McDermott in the 80s-90s were supplied with boilers formed from brass tube, the boilers wrappers in the two kits supplied by SSM in the late 2000s were rolled from sheet brass and were marginally larger in diameter. I will cover the smokebox assembly and modifications to the running board in a separate post. Edited May 3 by Mayner 4 1 Quote Link to comment Share on other sites More sharing options...
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