Rattle box design.

[JeffinNZ]

Team.
I want to make a rattle box for our gong range/bush walk. You know, the box you drop a ball in and it runs down the ramps back and forward till it falls out the bottom. Shoot before it exits.
I understand the layout of ramps etc. but what are the typical dimensions and angles of the ramps?
All assistance appreciated.

 

[B.Habermehl]

Sorry this may be not much help. The two that our club uses were made up using the educated eyeball method. 5 or 6 seconds of rattling is about right. A lead round ball rattles slower than a steel ball bearing or glas marble. So maybe this will give you a bit of fine tuning.

 

[Dane]

Jeff,

Another idea for you. A few years ago, I made one for the NMLRA Western Nationals. Using a funnel and some copper tubing, coiled up to look like a still. Drop the ball in the funnel, it rolls around and around the coils till it drops in the bucket below.

Works great.

 

[soggy]

:thumbsup: Good idea Dane; That's what our club uses. Wish I had some pictures to share but I haven't. However it seems to me that we used 5/8" copper tubing and this was just right for a .45 cal. lead ball. With this type you can "adjust" the time it takes for the ball to reach the bucket, by stretching the coils out a bit or squeezing them up some
Soggy

 

[JeffinNZ]

Great idea. Will consider that too.