AndyB
Western Thunderer
A bit of an odd request this - but maybe someone can help!
I'm designing etches for various Midland Railway Implement wagons in Gauge 3 from original drawings (dated 1912-13).
The solebars and longitudes use British Standard Beams ('I' section) - B.S.B.18 (10" x 6") and B.S.B.22 (12" x 6"). BS4 for such beams was first issued in 1903.
I have various post-WWII references, and a 1927 reference for the details of the beam section. All these show that the inside of the flanges were angled at 98 degrees to the web (or 8 degrees to the outside of the flange).
But the MR drawings of the brackets that fit with these beams do not agree with this taper - they come out at more like 4 degrees.
So I'm wondering if the standard sections were modified around WW1 - possibly to save material as part of the war effort?
Does anyone have a pre-WW1 edition of an engineer's reference book (e.g. Kempes, Molesworth, etc) that might contain dimensions of these sections?
I have tried the library of the Institution of Mechanical Engineers - they don't keep that type of book that old. Suggested I might be able to get copy of the old standard from BSI - but that will cost >£30.
Any information, suggestions or leads welcome.
Andy
I'm designing etches for various Midland Railway Implement wagons in Gauge 3 from original drawings (dated 1912-13).
The solebars and longitudes use British Standard Beams ('I' section) - B.S.B.18 (10" x 6") and B.S.B.22 (12" x 6"). BS4 for such beams was first issued in 1903.
I have various post-WWII references, and a 1927 reference for the details of the beam section. All these show that the inside of the flanges were angled at 98 degrees to the web (or 8 degrees to the outside of the flange).
But the MR drawings of the brackets that fit with these beams do not agree with this taper - they come out at more like 4 degrees.
So I'm wondering if the standard sections were modified around WW1 - possibly to save material as part of the war effort?
Does anyone have a pre-WW1 edition of an engineer's reference book (e.g. Kempes, Molesworth, etc) that might contain dimensions of these sections?
I have tried the library of the Institution of Mechanical Engineers - they don't keep that type of book that old. Suggested I might be able to get copy of the old standard from BSI - but that will cost >£30.
Any information, suggestions or leads welcome.
Andy