GP9 aluminum frame upgrade for O-Scale Red Caboose locomotives. Machined from 6061 aluminum alloy. Frame features include:
- Drop-in fit, no modification needed to locomotive shell
- Machined in prototype underframe detail (see below)
- Drilled hole for speaker wiring under the fuel tank
- Drilled accessory tray post holes (accessory trays not included)
Designed to replace the sagging plastic frames. Red Caboose GP9 aluminum frame fits all GP9 locomotives and locomotive kits. This frame also replaces the aftermarket flat brass frame. GP9 metal frame upgrade kit is intended to be used in conjunction with the P&D hobbies re-power kit #PDP2201K. This aluminum frame will work with both the plastic and cast brass truck conversion kits offered at P&D hobbies. NOT INTENDED for the stock motor setup.
Unlike the flat brass frame counterpart, FineScale frames feature machined relief pockets on the underside of the frame. Why go to the extra effort? It allows the bolster to be mounted on the top side of the frame, in turn, the locomotive sits lower on the trucks giving the locomotive a more prototypical look.
In addition to the relief pockets for the trucks, I have added relief pockets along the sides of the frame. These side frame reliefs let the frame tuck under the locomotive shell and create the side profile of the steel beam that can be seen in the section drawing of a prototype GP9 underframe.
Some argue that the brass frame is a better solution because it adds additional weight. In reality, the brass frame raises the profile of the locomotive, and to me, that negates any benefit of additional weight gain. Add in the absorbent cost of quality brass and aluminum becomes a clear winner.
Stick-on lead weight can be added to the frame in any configuration needed. This flexibility helps when fitting DCC decoder, battery, and sound installations.