Computer Generated Goblet

The design of this drum was based on what I learned from the hour-glassdesign. I needed to make the body tapered enough to reduce waste yetbig enough to produce some loud bass sounds. I also had problemskeeping the heads tuned on the old drum, so I figured a wayto mechanically tune the head.
I used some freeware CAD software to produce these 3-D drawings of thedrum body (what I will call the Goblet Drum from now on):

GOBLET DRUM BODY DESIGN

Here is what I would like the drum body to look like. The drum diametersand height are approximate values.

GOBLET DRUM DETAILED

Those extra rings on the goblet stem are for tuning the instrument. I planto run the drawstrings through holes in the first flange and tie them ontomachined eye hooks from the bottom flange. The drawing on the right showsthe design concept with a drum head attached.

GOBLET DRUM PLY

Here is an exploded 3-D view of the goblet rings. Yes, I plan to cut 18inch diameter rings out of wood composite and glue them all together! Ilike this drawing. It reminds me of Dali for some reason.

Click here to go on to the next chapter(May 8th -Cutting!) in this experiment or here to go back to the main DRUM page.