Search found 160 matches
- Mon Jan 07, 2013 8:53 pm
- Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
- Topic: 4 DOF Model
- Replies: 109
- Views: 195505
Re: 4 DOF Model
Jim, what do you think AII 2-38 to AII 2-43 should be? Hey Dom - I believe that it's the derivation of AII 2-38 to create AII 2-43. If you derive AII 2-38, we've both been getting F(+Kt.Kb.alphaab +...) instead of the F(-Kt.Kb.alphaab +...). A more complete explanation here: http://www.anzlf.com/vi...
- Sat Dec 29, 2012 3:29 pm
- Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
- Topic: 4 DOF Model
- Replies: 109
- Views: 195505
Re: 4 DOF Model
As for the math, the Wikipedia article on determinants is enough to go by. (I admittedly checked myself). I had a go at this & have to agree with you that I'm getting a positive value for the first term in in Equ AII 2-43 (ie., F(+Kt.Kb.alphaab +...). My solutions for AII 2-40 & 2-41 were the same ...
- Sat Dec 29, 2012 10:52 am
- Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
- Topic: 4 DOF Model
- Replies: 109
- Views: 195505
Re: 4 DOF Model
To summarize, in hopes that someone is checking the math too: It's not the programming, it's that, if Equ. AII 2-38 is correct (which I think it is), then Equ. AII 2-43 and it's corresponding copy in the main text is wrong. And I suspect the error is purely a typo in the text rather than something ...
- Fri Dec 28, 2012 10:46 am
- Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
- Topic: 4 DOF Model
- Replies: 109
- Views: 195505
Re: 4 DOF Model
I have nothing more to offer at the moment, sorry. All I can tell you is that the Excel solutions are pretty flaky and that I'm hanging out for Jim's Matlab solution, as that is likely to be the most robust to date and should cast a lot of light on where/how our solutions are diverging. Bummer. I'l...
- Thu Dec 27, 2012 2:37 pm
- Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
- Topic: 4 DOF Model
- Replies: 109
- Views: 195505
Re: 4 DOF Model
Jim, I think both John and Dom have been through the derivations (they will correct me if I'm wrong!) and I think they got what's in the book. John has also managed to get pretty similar charts to mine, here: http://www.anzlf.com/viewtopic.php?f=33&t=4636&start=50#p55463 , so at this point I'd say ...
- Wed Dec 05, 2012 6:45 pm
- Forum: Instrument Builders Forum
- Topic: Suitable Tasmanian soundboards
- Replies: 78
- Views: 64442
Re: Suitable Tasmanian soundboards
If you were building an instruments using blackwood for the back & sides what would be your first choice as a suitable Tasmanian species for the soundboard I have been lurking on this forum for a long time reading past posts but I would still like to hear forum members comments. Jo Hi Jo - here's a...
- Tue Nov 27, 2012 8:31 am
- Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
- Topic: Frequency Meter Software with adjustable freq. range
- Replies: 3
- Views: 6599
Re: Frequency Meter Software with adjustable freq. range
Thanks for the info guys. I had a look at the G-Tune website link & found a spot where you can still download the software (v 2.50). http://www.jhc-software.com/downloads.shtml I found that I had trouble installing it on my Windows 7 laptop, but it worked ok on my old computer (I think that this was...
- Fri Nov 23, 2012 8:48 pm
- Forum: Instrument Builders Forum
- Topic: Manuel Ortez 1972 Classical
- Replies: 18
- Views: 17115
Re: Manuel Ortez 1972 Classical
one also should consider the real meaning of the word ano without "ñ" ! (The spelling of "ñ" is "ni", not "n"). I was thinking the same thing Markus, but thought that perhaps it was acceptable in capitals. I once made a similar mistake wishing a woman in my Spanish class a Happy New Ano - she repli...
- Tue Aug 07, 2012 8:20 am
- Forum: Anything Goes
- Topic: Mars lander
- Replies: 10
- Views: 7529
Re: Mars lander
...and I work in mapping, so I'm keen on the look of the landscape - there's something for everyone hereNick wrote:You're thinking of the geology side of it but I'm fascinated by the engineering of it all.
- Mon Aug 06, 2012 7:28 pm
- Forum: Anything Goes
- Topic: Mars lander
- Replies: 10
- Views: 7529
Re: Mars lander
Very cool. You will have to excuse my ignorance, but are these impact craters or are there old volcanic craters on Mars too?
- Sun Jul 29, 2012 1:47 pm
- Forum: Instrument Builders Forum
- Topic: Carbatec Drum Sander-Ebay-Canberra
- Replies: 14
- Views: 13382
Re: Carbatec Drum Sander-Ebay-Canberra
Does anyone know if you can buy parts for this sander? The two rollers that drive the feed belt which are rubber over a steel rod have perished on mine. Unfortunately the belt does not run true any more! Wondering if the rollers would be available to buy. Thanks Alan I had to replace the the front ...
- Sun Jul 08, 2012 3:43 pm
- Forum: Anything Goes
- Topic: Tour de France/Suisse
- Replies: 9
- Views: 7282
Re: Tour de France/Suisse
...he could be frantically waving a ukulele so that we can have a positive ID....:) ...or a charango? One french f*ckwit waved his flag amidst the 7 man breakaway in last nights stage and came close to copping a black eye from some of the riders. Getting too close to pro riders in a breakaway hauli...
- Sun Jul 08, 2012 11:57 am
- Forum: Anything Goes
- Topic: Tour de France/Suisse
- Replies: 9
- Views: 7282
Tour de France/Suisse
Hey Markus,
I see that the Tour is heading through Canton de Jura tonight Australian time. Should we be watching out for you? I think that it is only fair that you should pre-warn us if you are intending on running alongside the peloton in only your underwear.
Steve
I see that the Tour is heading through Canton de Jura tonight Australian time. Should we be watching out for you? I think that it is only fair that you should pre-warn us if you are intending on running alongside the peloton in only your underwear.
Steve
- Sun May 06, 2012 6:55 pm
- Forum: Instrument Builders Forum
- Topic: Aussie Help Needed- Euc Id
- Replies: 4
- Views: 5219
Re: Aussie Help Needed- Euc Id
...and, also it may help to grab a few seed capsules if you can find some.Tod Gilding wrote:Hi not an expert , but can tell you that you will need pics of the foliage for any chance of an ID
- Fri Apr 13, 2012 8:46 am
- Forum: Anything Goes
- Topic: Thank God I read the label!!
- Replies: 24
- Views: 17029
Re: Thank God I read the label!!
You guys have reminded me of a similar experience a couple of years ago in Woolies. They were selling herb seedlings & had a warning label on the back:
"Warning: Potting mix is not edible".
Kind of wished that I had taken a picture now.
"Warning: Potting mix is not edible".
Kind of wished that I had taken a picture now.
- Mon Mar 19, 2012 6:40 am
- Forum: Anything Goes
- Topic: Its All YOUR Fault
- Replies: 16
- Views: 13761
Re: Its All YOUR Fault
You do know that we refer to meat pies of unknown or questionable origin as rat coffins, don't you?Lillian wrote:This has got to stop.
- Sat Feb 25, 2012 7:18 pm
- Forum: Instrument Builders Forum
- Topic: Blackwood Stain.
- Replies: 51
- Views: 37189
Re: Blackwood Stain.
I also wrap in paper, use alloy flashing & got staining on my last set of blackwood sides too. I gave them a light spray, but I'm going to be giving them a wipe off next time now too - thanks for the discussion fellas.
- Thu Feb 23, 2012 8:41 pm
- Forum: Anything Goes
- Topic: What's up with the....
- Replies: 19
- Views: 15109
Re: What's up with the....
I heard a great comment this morning...
"The Australian people are sitting back at home watching a soap opera & are frustrated that their remote control is tantalizingly out of reach".
"The Australian people are sitting back at home watching a soap opera & are frustrated that their remote control is tantalizingly out of reach".
- Mon Jan 30, 2012 8:46 pm
- Forum: Instrument Builders Forum
- Topic: Tassie tone wood suppliers.
- Replies: 5
- Views: 5969
Re: Tassie tone wood suppliers.
Does anyone on the forum have any connections with saw millers or tone wood suppliers in Tassie? the wife and i are planning a trip down there and i thought if it was possible i'd take the opportunity and check out some timber at the source! Cheers,,, Rod. Hey Rod, Check this old thread out... http...
- Thu Jul 14, 2011 4:10 pm
- Forum: Instrument Builders Forum
- Topic: What is this very dense purple(ish) imported timber?
- Replies: 14
- Views: 13490
Re: What is this very dense purple(ish) imported timber?
It was a long time ago so I may be wrong. It was at the Jetty markets in Coffs that I bought it! Hey, small world, isn't it? A one minute walk from where I work. Is Kwila this bright a purple when it is freshly milled? I would have said that it's more of a deep red, so I'll defer to Jim's Purplehea...
- Thu Jul 14, 2011 3:29 pm
- Forum: Instrument Builders Forum
- Topic: What is this very dense purple(ish) imported timber?
- Replies: 14
- Views: 13490
Re: What is this very dense purple(ish) imported timber?
If you hadn't said South America, I would have guessed Kwila Martyn. It looks quite similar.
- Wed Jul 06, 2011 8:18 pm
- Forum: Anything Goes
- Topic: Support the Christchurch Earthquake Appeal
- Replies: 12
- Views: 9319
Re: Support the Christchurch Earthquake Appeal
Great to see that they're so busy. I rallied the troops at work and put in an order this evening. A great cause.
- Thu Jun 23, 2011 8:05 pm
- Forum: Instrument Builders Forum
- Topic: Benefits of age?
- Replies: 8
- Views: 7302
Re: Benefits of age?
Do you reckon that there's an element of association with diminishing resources? Timber sourced a long time ago comes from an era of more big/slow-grown trees to go around, perhaps even virgin scrub. In contrast, today foresters are looking at supplying increasing demand for timber, and moving back ...
- Sun Jun 12, 2011 4:15 pm
- Forum: Anything Goes
- Topic: Planking
- Replies: 23
- Views: 19897
Re: Planking
Apparently this the first Vincent motorbike to sport a rear shock absorber. Can't help but think that Rollie may have insisted on that one.
- Sun Jun 12, 2011 10:01 am
- Forum: Instrument Builders Forum
- Topic: Wood names in Babylonia
- Replies: 8
- Views: 7826
Re: Wood names in Babylonia
...Australian Blackwood is a good example , I see that you have Sally Wattle listed as Acacia melanoxylon when in fact it is Acacia salicina pronounced Sally seena hence the name Sally wattle Mr Spittle markets this Australian blackwood as Cooba, So yes it can be confusing :D You're right Tod, comm...