scaro wrote:Quite a number of the units built for SE roads, and the WP and perhaps the C&O did have Blomberg trucks.
However, Al is right, the AAR-B was the standard. 9'4" wb.
Some of the FMs had a 9'6" wb truck.
That would include SAL, SCL, Family Lines, SBD, and CSX, who all had GE units riding on Blomberg trucks salvaged from traded in locos. The 4" difference it TT scale is about 2 thousandths over 1/32" which is not much. For many years, HO has used the same wheel based trucks to represent both AAR and Blombergs simply by changing the sideframes which just plug in to the truck frame. This should be doable in TT using RP printed sideframes from Shapeways mounted on MTB's 9' trucks as available from CSD. There are also better RP printers out there if you want to make masters for casting them in resin.
Has anyone actually measured the Bromberg sideframes from CSD? In the illustrations I have seen, their sideframes look to be a bit "stretched out", long enough to make me wonder if the wheel base is actually a scale 9'.
I would also think the MTB trucks would be a good solution for the TT GP38 shell that Al and the society have been working on for so long. Just to make things even more confusing, seems to me I've seen some photos of prototype EMD locos riding on AAR trucks rather than the usual Blombergs, also probably the result of trade-ins on new locos, so it can go both ways.
By the way Alex, your U-boat looks great!!! When will you start taking the orders?
Bill in FtL