Search found 1502 matches

by rkcarguy
Wed Nov 18, 2020 12:43 pm
Forum: Riding Scale Railroading
Topic: Etching Brass for Painting
Replies: 7
Views: 377

Re: Etching Brass for Painting

Anytime I have used a chemical etching solution on anything with holes/rivets/screws, a little of it always seems to remain and then the paint peels around those features. It's ever so slightly, even if you do a really good job cleaning up after it's been etched. The only success I've had is doing t...
by rkcarguy
Tue Nov 17, 2020 5:16 pm
Forum: Riding Scale Railroading
Topic: Riding Scale 'Diesel" locomotive
Replies: 16
Views: 836

Re: Riding Scale 'Diesel" locomotive

There was a guy in Delaware with a railroad (http://www.islandpondrailroad.com/) that described some experiments he had done with this. I think he had a working engine. A quick search of his website didn't show it, but it might be buried in one of his links. You could reach out to him. Island pond ...
by rkcarguy
Tue Nov 17, 2020 5:12 pm
Forum: Riding Scale Railroading
Topic: Riding Scale 'Diesel" locomotive
Replies: 16
Views: 836

Re: Riding Scale 'Diesel" locomotive

I've been through a bunch of technical drawings for various small diesel engines. Placed in a widebody style locomotive and having the frame more or less designed around the engine, it seems like the Kubota's could fit but it would be tight. For my 12" RR, I ended up using a gas powered GX390 with a...
by rkcarguy
Wed Nov 11, 2020 10:42 pm
Forum: General Discussion
Topic: To Farm Out to China or Not
Replies: 16
Views: 2018

Re: To Farm Out to China or Not

Good find on the local shop. Outsourcing stuff to China is a **** show. I've had a fair amount of REWORK as a result and so has my uncle who works in the plastics and mold industry. They cheat and cut corners in unimaginable ways to get a few more cents profit on each part, with no remorse for the p...
by rkcarguy
Wed Nov 11, 2020 10:30 pm
Forum: General Discussion
Topic: What kind of tap set???
Replies: 31
Views: 1422

Re: What kind of tap set???

There is 1 HSS tap set at horrible freight that is a good set... This photo isn't real clear, but they all look to be plug hand taps, which are not suitable for power-tapping. Caveat emptor! You only get what you pay for. The set I got contained 2-flute spiral tip taps up to 1/4", then the bigger o...
by rkcarguy
Wed Nov 11, 2020 1:37 am
Forum: General Discussion
Topic: What kind of tap set???
Replies: 31
Views: 1422

Re: What kind of tap set???

I'm going to go against the "grain" a bit here. There is 1 HSS tap set at horrible freight that is a good set. I think it goes from #4-40 up to 1/2" and metric to 12mm, and even has a few pipe taps and some dies in it for around $40. The larger taps are 3 and four flute, and I wouldn't power tap wit...
by rkcarguy
Fri Nov 06, 2020 5:56 pm
Forum: Riding Scale Railroading
Topic: Electric drive motor specs
Replies: 58
Views: 6116

Re: Electric drive motor specs

Glenn, you could use sprockets and chain and only one right angle gearbox per truck to keep things simpler and still have all wheels driven.
Surplus center has all that stuff it's fairly inexpensive.
by rkcarguy
Fri Nov 06, 2020 5:51 pm
Forum: Riding Scale Railroading
Topic: Spring Rate Calculation
Replies: 10
Views: 1454

Re: Spring Rate Calculation

X-1 Trucks.jpeg
These are 2.5" X-1 trucks, SBC valve springs if I remember correctly.
by rkcarguy
Fri Nov 06, 2020 5:47 pm
Forum: Riding Scale Railroading
Topic: Spring Rate Calculation
Replies: 10
Views: 1454

Re: Spring Rate Calculation

Small Block Chev valve springs work good for larger scales like 2.5" and 3", lots of different rates, and they are sometimes progressive so they will ride nice when your car is empty but stiffen up when loaded down.
by rkcarguy
Fri Oct 30, 2020 9:42 pm
Forum: Riding Scale Railroading
Topic: Electric drive motor specs
Replies: 58
Views: 6116

Re: Electric drive motor specs

Glenn, the "Athearn" HO scale trains come with a setup like that, they use a single electric motor mounted in the center with drive shafts extending out to worm gear boxes on each truck. Yes it's complicated but would let you put a big electric motor in the middle where there is a lot more room inst...
by rkcarguy
Thu Oct 29, 2020 12:07 pm
Forum: Riding Scale Railroading
Topic: Electric drive motor specs
Replies: 58
Views: 6116

Re: Electric drive motor specs

Glenn Brooks wrote:
Wed Oct 28, 2020 11:22 pm
2400 rpm on the plate...
280 rpm at the axle with a 7" tire size is about 5.9mph. You're going to need about a 10:1 reduction between your motor and drive axles.
by rkcarguy
Wed Oct 28, 2020 9:21 pm
Forum: Riding Scale Railroading
Topic: Key stock for axles and drivers?
Replies: 11
Views: 2395

Re: Key stock for axles and drivers?

Glenn, I'm late to the party on this one, but my racing go kart has hubs that allow the rear track width to be set by sliding them in and out on the axle. They utilize a pinch bolt and 2-3 set screws on top of the key. I have never had one move except the one time I got put into the wall at ~50mph a...