Unaware of this creole system. Boards are sold in lengths of 2, 2.5 and 3 meters, or 4 meters and thicknesses of 15 but also 17 and 18 mms depending on the surface finish (not completely arbitrary- they may have started with a 20 mm thick board that was trimmed down to a perfect finish), Wooden Beams in sections of 8 cms square, 10 cms or 15 cms. Bathroom tiles are commonly 20 cms square, 25 and 30 cms square, but also 33.3 cms x 50 cms for larger fancy floor tiles (a harmonic section of one third of the meter over half meter ). Something along these lines. Harmonic ratios are also important for designing rectangles and I should think that the golden section should be somewhere. The sides of the A4 and A3 size papers relate to the square root of 2 = 1.4142:1. 29.6:21, and so on. 29.6 m. is an old foot, indeed.
Chrys ----- Original Message ----- From: "Steve Tyng" <[email protected]> To: "R/C Tank Combat" <[email protected]> Sent: Sunday, June 28, 2009 7:13 PM Subject: [TANKS] Re: Traverse - failed attempt #1 > > On this metric stuff (or what should really be called > decimalization). May I ask what are the common sizes building > materials are purchased in? I understand boards are sold in 120mm > length increments and thickness's available in divisions and > increments of 2.4cm. I find this interesting in that these numbers > are all divisible by 2, 3, 4, and 6 (just like the imperial system). > I've also read the the 2.4cm figure is often expressed as the > "thumb". I wonder what the 120mm figure will be called, the palm? To > me it seems the common man working in the real world and having to > measure human scale things is converting the supposed "better" metric > system back into the old imperial system. > > Steve "I'll Take a 2x4 Any-Day" Tyng > > > > I've read that the 2.4cm figure is comonnly known as the "thumb" > > > are often expressed in "thumbs" which from what I understand is > 2.4cm. > > On Jun 28, 6:19 am, <[email protected]> wrote: > > The UK went metric in 1971. > > I have had apprentices who don’t know what an inch is. > > I know you can divide 12 by 3 , but metric in construction is simpler and now universally widespread > > > > Neil R > > > > ---- Gregory Pwneror <[email protected]> wrote: > > > > > No problem, the real question though is: Why is a British person using > > > metric systems? > > > > > -Greg > > > > > On Sat, Jun 27, 2009 at 4:10 AM, <[email protected]> wrote: > > > > > > Thank you Greg, I appreciate your effort , I confuse Force with Pressure, > > > > Im not too bright you know :) > > > > > > Neil R > > > > > > ---- Gregory Pwneror <[email protected]> wrote: > > > > > Steve, I was talking about how neil was saying that he dealt in Newtons, > > > > not > > > > > PSI. > > > > > > > " > > > > > > > Ben , I think your problem Could well lie with the quality of your lazy > > > > > Susan , looking at the last pic I wonder how thick it is , I measure > > > > force > > > > > in Newton’s and I have no idea how inch pounds relates to Newton’s so I > > > > cant > > > > > be mathematical, but your motor looks `grunty` enough to me. can you turn > > > > it > > > > > with your hand easily ? > > > > > > > Neil R > > > > > > > " > > > > > > > That's what he said. I was saying that you can't really compare newtons > > > > to > > > > > PSI, you use Pascals as an equivilant. > > > > > > > -Greg > > > > > > > On Fri, Jun 26, 2009 at 3:54 AM, AES <[email protected]> wrote: > > > > > > > > Guys, > > > > > > > > I offer gears that attach tot he Rocklear bearrings. take a look here > > > > for > > > > > > pictures: > > > > > >http://astromechbuilder.com/mechloader/v/R7Dude/Parts/Frame+Group/Gea... > > > > > > > > And here: > > > > > > > >http://astromechbuilder.com/mechloader/v/R7Dude/B9/Gears/ > > > > > > > > let me know if your interested > > > > > > > > Andy > > > > > > > > ------------------------------ > > > > > > *From:* Fred Thomson <[email protected]> > > > > > > *To:* R/C Tank Combat <[email protected]> > > > > > > *Sent:* Thursday, June 25, 2009 10:55:44 AM > > > > > > *Subject:* [TANKS] Re: Traverse - failed attempt #1 > > > > > > > > Exactly the problem I encountered with a belt driven turret. I so I > > > > > > went to gear driven and have a fine toothed ring gear on the turret > > > > > > and drive sprocket on the motor. There is just enough 'slop' in the > > > > > > lazy susan to allow the teeth to disengage. I ended up having to put a > > > > > > tensioner gear with a fairly heavy spring, opposite of the motor to > > > > > > hold the lazy susan in place. Not the best solution but a solution > > > > > > none the less. I have been toying with the idea of a bearing mount > > > > > > (genuflecting towards The Master :-) ) as the lazy susay wobbles when > > > > > > the tank is moving. > > > > > > > > -Fred "Fuzzy Engineer" Thomson > > > > > > > > On Jun 25, 7:37 am, Frank Pittelli <[email protected]> wrote: > > > > > > > Modena wrote: > > > > > > > > yes, and I also tried slacking it off, which also didn't help. > > > > Another > > > > > > > > (hopefully higher quality) susan is on the way > > > > > > > > > I have four lazy susans sitting in the shop doing nothing ... why, > > > > > > > because they don't work well for much of anything in our hobby. Do > > > > > > > yourself a big favor and replace it with an actual "bearing". > > > > > > > > > Frank P. > > > > > > > -- > > > > > 30% of road accidents are caused by drunks, therefor if we banned sober > > > > > driving, so why is sober driving legal and drunk driving illegal? > > > > > -- > > > 30% of road accidents are caused by drunks, therefor if we banned sober > > > driving, so why is sober driving legal and drunk driving illegal? > > > > > > > > > > __________ Information from ESET NOD32 Antivirus, version of virus signature database 4194 (20090628) __________ > > The message was checked by ESET NOD32 Antivirus. > > http://www.eset.com > > > __________ Information from ESET NOD32 Antivirus, version of virus signature database 4194 (20090628) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com --~--~---------~--~----~------------~-------~--~----~ You are currently subscribed to the "R/C Tank Combat" group. 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