The gestation of a harp

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This topic has 63 replies, 8 voices, and was last updated 15 years, 2 months ago by Liam M.

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February 1, 2009 at 1:15 pm #155115

Tacye
Participant

Think about the difference between raising pitch by tuning a violin string up (vibrating length stays much the same, tension increases) and raising the pitch by stopping it with a finger (vibrating length is shortened, tension remains much the same).

One of the early steps in physics experimentation is working out very clear-headedly how to alter as few variables as possible at a time and trying to detangling all those which can be detangled.

February 1, 2009 at 2:56 pm #155116

michael-rockowitz
Participant

Yes Tacye,

February 1, 2009 at 8:23 pm #155117

bernhard-schmidt
Participant

Yes, that it is !

Regards

February 1, 2009 at 8:56 pm #155118

michael-rockowitz
Participant

Bernhard, Tacye,

I thank you both for your efforts at getting this point through to me!

Michael

February 1, 2009 at 9:34 pm #155119

michael-rockowitz
Participant

Hello to all,

Here’s an update on the process, such as it is – I’ve cut out the inner (hard maple) and outer (walnut) ribs.

February 1, 2009 at 10:48 pm #155120

michael-rockowitz
Participant

One more comment-

I hope the readers aren’t finding all this too boring.

February 1, 2009 at 11:45 pm #155121

Karen Johns
Participant

What type of wire strings are you going with? As far as I know, only three types of

February 2, 2009 at 2:15 am #155122

michael-rockowitz
Participant

Karen,

Thank you for your kind words of encouragement!

I’m pretty far off from being at the point to consider which stringing material to use – My plan was for something akin to an acoustic guitar string set, with brass-wound strings in the lower registers.

February 2, 2009 at 8:24 pm #155123

Liam M
Participant

Michael,

I found a trick for gluing… dash over to U Haul or somewhere where they sell those vacuum storage bags for clothing. One of the regular size ones works well. Then put the pieces in the bag, a fixed weight on top and hook up the shop vac!! Works splendid!!

February 2, 2009 at 10:43 pm #155124

michael-rockowitz
Participant

Liam,

Thanks for the idea.

February 2, 2009 at 11:28 pm #155125

Liam M
Participant

Michael,

February 3, 2009 at 12:54 am #155126

michael-rockowitz
Participant

Liam,

I’ll have to experiment with this.

February 3, 2009 at 5:11 am #155127

michael-rockowitz
Participant

Liam (or anyone else who can respond to this question),

Entering into the world of my potentially faulty understanding of physics – is it not also the case that the vacuum technique cannot exceed approximately 15 lbs of pressure at any given point, and that its greatest advantage is in the even application of this pressure all over the work at the same time?

February 8, 2009 at 9:11 pm #155128

michael-rockowitz
Participant

Hi

February 14, 2009 at 3:23 pm #155129

michael-rockowitz
Participant

Hello to all,

Here are some pictures of where I am so far – there are multiple viewable pictures in the album.
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