1:50 Dragline

[modelman]

Rvjimd-I really admire you for taking on a project this small. Having built a few complicated models that were medium in size but they were giants compared to this one. I have really bad eyesight and I promised myself that I would never take on another "small" build. Just a suggestion for the slewing gear. You need a large gear under the base of the model and I think a servo like you are using will work to turn it but it needs to be slow if possible. They make plastic gears for helicopters I think in the 3"-5" range and that could possibly work. Most draglines and big shovels use a gear almost as big as the house. They also make matching pinion gears that you probably could adapt to your servo. Keep at it and post lots of pictures and good luck.

[Rvjimd]

Model man,

Thanks for the comment. I'm with you on the eyesight! Here is a shot of the bench with a lighted mag viewer! I have three of those suckers at each one of me hobby/shop areas!

In the other pic you can se e the cast slew ring. I'm going to try exactly what you suggest, using a rubber wheel on a servo to drive up against the ring. Hard part will be finding space in the cab for the servo, in the right spot!





Jim

[Rvjimd]

Here are the pictures of today's progress. Disassembly and took the hoist and drag drums out of the carrier bracket. Drilled thru the hubs and screwed thru and into the servo.

Gonna have to edit this after I get the pics moved... Stand by...

[Rvjimd]

Okay, here are the pics...



















Had to notch the drum frame to allow inserting the drums back into the frame after screwing the servo to the drums.

The shaft with the small pinion gear is to become the drive gear running against the ring gear.

I'm loving this, hope you guys enjoy it half as much as I am.

I hope to have it back together and running three channels by tomorrow afternoon!

Jim