PDA

View Full Version : Look at this 100 bc. and you have lathe



Brett Hurt
12-10-2010, 11:53 AM
http://www.youtube.com/watch?v=RLPVCJjTNgk&feature=player_embedded,

http://beta.irc-urls.net/url/8c51fe46b3c29f47a6bc50098b215bc3 so what do you think look these up on line Brett

dalee100
12-10-2010, 12:14 PM
Hi,

Just goes to show, it's less about the tools. And more about what's in your head, (doing the math). Coupled with the desire to do something, will get the job done.

dalee

jugs
12-10-2010, 12:29 PM
A proper reconstruction HERE (http://www.youtube.com/watch?v=_PrlERqn2Qc&feature=related) & HERE (http://www.youtube.com/watch?v=ZrfMFhrgOFc&NR=1&feature=fvwp)

john
:)

Dragons_fire
12-10-2010, 12:54 PM
thats something i have always wanted to build, but just havent had the motivation to do all the math to figure out what gears are needed.

krutch
12-11-2010, 06:47 PM
So....how did the ancients cut the gears?? And what did they know that we have lost? And why did it take all those years to find out what we think we now know?

Liger Zero
12-11-2010, 07:14 PM
So....how did the ancients cut the gears?? And what did they know that we have lost? And why did it take all those years to find out what we think we now know?


The Church, The Church and nothing but The Church. So much was lost, locked away, or destroyed by missionary efforts in the name of Controlling The Population .

Now I'm not saying that it's totally the work of The Church but when it comes to wrecking old advanced civilization and holding progress back most of the time The Church has been involved.

Lets see.... Chemical batteries, gears, advanced math, research on boiling and steam power, formulations for alloy, pigments, coatings and medical remedy....

I bet if such a heavy hand hadn't been applied to the Other Civilizations of the world in the name of Religion we'd be quite a bit farther along technology wise. Fun to speculate where we would be today if we hadn't destroyed the South American civilizations or interfered in Asia or totally subsumed the Native American populations.

smalltime
12-11-2010, 08:10 PM
The church also advanced and kept alive many other forms of civilization. During the dark ages they church responsable for keeping the written word in play, and keeping those who knew their letters in practice.

It was also key in the forming the banking system we know today. Even though it has been corupted by a few million law and regulations

There are two sides to this sword.

Liger Zero
12-11-2010, 08:18 PM
There are two sides to this sword.

Absolutely. ;)

Rustybolt
12-11-2010, 10:21 PM
So....how did the ancients cut the gears?? And what did they know that we have lost? And why did it take all those years to find out what we think we now know?



Probably with an index plate and a file rest on a lathe. lathes have been around longer than the greeks.


" Give me fire and a hammer and two pieces of steel. With one I will make a chisel. And with the hammer and the chisel and the other piece of steel I'll make a file. And with the file I can make anything."

loose nut
12-12-2010, 02:00 PM
The church also advanced and kept alive many other forms of civilization. During the dark ages they church responsable for keeping the written word in play, and keeping those who knew their letters in practice.
also key in the forming the banking system we know today. Even though it has been corupted by a few million law and regulations
.


Actually they kept alive the parts that they wanted and hid or destroyed the parts that didn't fit there view of what the world should be.

Rustybolt
12-12-2010, 02:15 PM
Actually they kept alive the parts that they wanted and hid or destroyed the parts that didn't fit there view of what the world should be.


That there was any literacy at all during a thousand years of darkness was because of the presents of the church. That there was any inquiry at all was because of the absence of the church.

Rich Carlstedt
12-12-2010, 03:49 PM
The Greeks had figured out cycloidal motion 2000 years ago. This enabled gears, both internal and external to be made by metal workers back then .
This was further developed by the French mathamatician and astronomer Philippe de La Hire in 1666, who inspired Matthew Murray of Leeds, England to Cast gears in 1802 that are superb. The gears were not machined, but cast and are fantastic, showing the ability of an 1800 Murray foundry

You can see the original Murray engine and a model using "hypocycloidal" motion on the ring gear and epicylic motion on the reduction gears at this website. The pressure angle, FYI is 17 1/2 degrees
http://stationarysteam.com/cycloid.htm

To see what de La Hire developed go here
http://en.wikipedia.org/wiki/Philippe_de_La_Hire
and for some neat graphics go here
http://en.wikipedia.org/wiki/Epicycloid

EddyCurr
12-13-2010, 02:01 AM
You can see the original Murray engine and a model using "hypocycloidal"
motion on the ring gear and epicylic motion on the reduction gears at this
website. The pressure angle, FYI is 17 1/2 degrees
http://stationarysteam.com/cycloid.htmThe scale model displayed on that link is a pleasure to behold - nicely done.

Thank you for the background description and supplemental material on
the topic.

.