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Wow Bryan! You're taking scratchbuilding to the next level. No, 5 levels higher! I see some Kato components being used, and some designs following what Kato does. I think that's excellent, but I'm not a fan of those flexible pickup cups. Those are very delicate and easily bent. However, since only you (not some random model railroader) will be handling it, I quess it is ok. It's an excellent concept for maximizing electrical pickup.I'm curious how you will get those bearing/pickup plates made?
The Kato GG-1 motor, flywheel, gears and wheels. Everything else will be scratchbuilt. I like the copper pickup cup design. It’s needed in this case because the truck frame is rigid, so the two outer driver axles are fixed and the middle driver axle along with the two pilot axles will float. This also allows for all axles to pick up power. On the copper pickups — etched perimeter with the cups pressed or stamped. TBD.
Started working on the next one, a New Haven EP-2. This one is going to take awhile as there will be fewer commercial parts in their standard configuration. The plan is to build the virtual model so that it’s only one pass to construct the actual model. This is one virtual truck. I’m actually enjoying learning how to create motion-based mate links to various components in the assembly and animate them. It’s already allowed me to discover some design errors and correct them.
K2 is ready for the paint booth! Kinda like those Sylvan green air compressors
Thanks for the explanation. The way I understand that floating (sprung) suspension, at least in Kato's implementation, is that it does not allow for more lateral play (just vertical deflection). In your example it seems like you would need lateral play for the wheelsets to be able to shift sideways on curves.
No, it's for vertical play, to account for track irregularities and grade changes. The truck full wheelbase is 35'5" so it's comparable to a mid-length steam engine and should be able to handle 18" radius and #8 crossovers. The gear column is located in the same position in relation to the truck frame as the bolster was on the prototype, so the trucks will pivot prototypically. And there will be some minor lateral play in the pilot wheels, the same amount as in a Kato GG-1 driver wheel. In theory, it should track the same as a GG-1 ... and the EP-3 and EP-4. In theory.