Progress on new Standard Gauge GG1

Looking good Jim.

Steve

Wow that belt drive is a thing of beauty...

Check your worm-worm wheel lash & lubrication though, it looks like the worm wheel is really worn.

I’ll check. This one has only been run for a few minutes. They are slathered up with ‘red and tacky’ grease. No real wear. The Boston worm wheels have that shape for full contact to the worm 

The gears on my Daylight have the same cut.

Steve

Steve "Papa" Eastman posted:

The gears on my Daylight have the same cut.

Steve

 

Only difference is that the GG1 uses 20:1, your engine is 30:1. Both out of the Boston catalog.  Smaller drivers on the GG1 and difference RPM range on the German can motors (slower at same voltage).

Jim

That is one sweet and smooth looking sand casting,  Your Foundry did good work.

Dennis Holler posted:

That is one sweet and smooth looking sand casting,  Your Foundry did good work.

Dennis, this shell already has about 4 hours of finishing on it. Since then I've done about 3 more before primer. Baking the green paint on now, might need a second coat., I'm anxious to get the PRR markings on it and get it back on the road.

Jim

ADCX Rob posted:

Wow that belt drive is a thing of beauty...

Check your worm-worm wheel lash & lubrication though, it looks like the worm wheel is really worn.

Jim,

I agree with Rob!  Nice belt drive system, which looks similar to the belt drive system, which RichArt/C&M used on their Toonerville Trolleys.  Is it?

Bob Nelson

Very interesting approach!  I have no concerns about the belt drive system.  But are the worm and worm wheel back-drivable?  I.e., can the wheels turn the motor?  If not, perhaps you should consider substituting shorter motors like a dual-shaft Pittman 9432, with flywheels on top.

Williams used can motors oriented like yours in their early O gauge offerings.  Self-locking worm gears and NO flywheels.  The unfortunate result: a sudden loss of power and/or ham-handed use of the 'DIR' control on the transformer made for a bone-jarring stop!  At least in your case the loco doesn't have rubber tires, which IMO are an anathema.  But with that much weight it would make for a lurid skid!!

navy.seal posted:

ADCX Rob posted:

Wow that belt drive is a thing of beauty...

Check your worm-worm wheel lash & lubrication though, it looks like the worm wheel is really worn.

Jim,

I agree with Rob!  Nice belt drive system, which looks similar to the belt drive system, which RichArt/C&M used on their Toonerville Trolleys.  Is it?

Bob Nelson

Bob,

It's more like the belts that Glenn Toy used on the FA1 diesel, pretty stout, they are timing belts normally used in machines like 3D printers. Nice and quiet, and widely available.

Jim