Project Guinjo

[Drew Stephenson]

Beats me.
Btw - the next one will have to be a 12 string attached to the first . . . .

Somewhat amazingly, they do exist: https://www.google.com/search?q=twin+ne ... =873&dpr=1

[Wonks]

It will soon be duelling guinjos, and canoe trips down the River Ouse will become far more dangerous. The air will be filled with the sound of people squealing like pigs (which will at least cover up the sound of the guinjos).

[shufflebeat]

...guinjos.

I propose "guinjeax".

[ManFromGlass]

Somewhat amazingly, they do exist: https://www.google.com/search?q=twin+ne ... =873&dpr=1

Right. Doesn’t the guitarist in Led Zepjo play one?….

[MarkOne]

Next one needs to be a triple neck banjo-lute-fretless 12 string

[Martin Walker]

Next one needs to be a triple neck banjo-lute-fretless 12 string

You've been listening to Steve Vai again, haven't you?

[ManFromGlass]

Praying for audience to bear with him because one of the G strings is out and it will take a half hour to find and tune it?

[Drew Stephenson]

Interesting semi-fretted bass there.

[Martin Walker]

Interesting semi-fretted bass there.

If you're interested, here's Steve Vai talking about the Hydra's design concepts:

https://www.youtube.com/watch?v=eN9r0jlhUpU

[Drew Stephenson]

Thanks Martin

[Drew Stephenson]

You might consider some padding on that metal rim as it might not be too comfortable to rest an arm over, unless you’re into that sort of thing……
Not judging at. . . . . .

Quick update a year on, I have added a little bit of aluminium tube to act as a forearm rest (which helps a bit) and swapped the out drum head out for a bit of calfskin.
This has significantly tamed some of the less pleasant overtones that I was previously damping with a bit of foam.

[BJG145]

Very nice.

[tea for two]

Quick update a year on, I have added a little bit of aluminium tube to act as a forearm rest (which helps a bit) and swapped the out drum head out for a bit of calfskin.
This has significantly tamed some of the less pleasant overtones that I was previously damping with a bit of foam.

I've just seen this thread. Read skimmed thru most of the posts. My Kora is covered in cowhide. If I had seen this thread year half earlier I would suggested cowhide.

[Wonks]

I’d have gone with asbestos. You need to make those things as fireproof as possible if you plan to play them in public.

[Drew Stephenson]

I've just seen this thread. Read skimmed thru most of the posts. My Kora is covered in cowhide. If I had seen this thread year half earlier I would suggested cowhide.

I was just using the original drum head initially because, a) I didn't know any better, and b) it was really just a proof of concept.
But I'd been wondering about changing the skin for a while. Now I've got all the parts recorded for the latest album I decided to give it a go.

I’d have gone with asbestos. You need to make those things as fireproof as possible if you plan to play them in public.

But then if it catches the fumes would be toxic and...

Oh wait, I see your game.

[Drew Stephenson]

Well that's frustrating:
https://photos.app.goo.gl/fZjYJYe91PsPWHuj6

[zenguitar]

Ouchies

Andy

[Drew Stephenson]

In retrospect, the design flaw is obvious. If I'd loaded the drum onto the spine from the bottom then a) the string tension would be pulling the tail joint together and b) the complete part of the hoop would be under tension with the cutouts in compression against the spine.
Not something that can be changed retroactively.
So the question is whether I can add a hoop of sufficiently high tensile wire at the base to cramp everything back together. A quick dabble in the garage suggests the principle is valid but that copper cable is not strong enough.

[Wonks]

Not long 'till Nov 5th.

[Wonks]

Can you take a couple more photos? I'm not exactly sure just what's happened there apart from something coming apart.

[Drew Stephenson]

Can you take a couple more photos? I'm not exactly sure just what's happened there apart from something coming apart.

Well, it's in pieces in the garage now so not really...

The photo is of the underside of the body with the neck at the top of the picture and the tail at the bottom. The splits (top and bottom) are where the hoop is being pulled away from the spine.

What's happened is that the skin had stretched a bit over time, so I'd popped the head off, tightened up the skin a tad, put the head back on and was working round the tuner lugs tightening it up properly.
At which point it made a horrendous creaking noise...

Basically the tension on the skin is opposed by a tension in the bottom of the hoop. The skin pulls in the top of the hoop forcing the bottom of the hoop outwards (as if it's trying to turn the hoop inside out).
However because I loaded the hoop onto the spine from the top (thinking this would be better for countering the string tension), it meant cutting two lugs out of the bottom of the hoop. At it's at those stress concentration points that it's failed.

I'm not sure that my wire-in-tension round the bottom of the hoop is going to work so I'm currently considering two threaded rods in tension in an x-brace across the bottom of the hoop to squeeze it back in place.

[ManFromGlass]

You should have checked with a drummer first -
You would have heard that calfskin is much more than a head choice. It’s a lifestyle. Timpanists, snare drummers and others who have gone over to the calf skin side don’t realize what they are getting into at first!

[Drew Stephenson]

I've got skin heads on all my drums too, but they're not giving me any grief. It's literally just because I didn't think through the design implications when I built this - I was focused on the string tension and didn't consider the skin tension.

[Wonks]

Have you tried moisturiser?

[Martin Walker]

I'm sorry to see the sorry state of your Guinjo Drew - hope your mods sort out the problem.