Crazy Engineers .CoM

Tuesday, November 29, 2011

CrazyEngineers Forum - Mechanical & Civil Engineering

Posted: 29 Nov 2011 11:33 AM PST

So far I know Gears provide better power transmisssion capabilities and there is no belt slip is with belt drives.
What are some more pros and cons.
High Torgue and moisture and long production runs is the type of operating environment.
Which should i use?

Alternative fuels for the internal combustion engine?

Posted: 29 Nov 2011 08:34 AM PST

So I have transplanted a 2003 hyundai 2.7L v6 and 4speed auto transaxle into the back of a 1939 plymouth touring. Running gasoline is just far too passe. Ive debated running propane. Building a custom tank for under the hood, but again, thats too common. Alcohol is a possibillity, but still overly done. Perhaps a hydrogen/oxygen engine?

What are your thoughts?

CrazyEngineers Forum - Other Engineering Trades

Have a ball with this flying Sphere!

Posted: 29 Nov 2011 07:33 AM PST

Japanese Defense Ministry shows world's first spherical flying machine

Aeronuttical engineering going Crazy.

Monday, November 28, 2011

CrazyEngineers Forum - Other Engineering Trades

Ekranoplan - Wing-in-ground Effect plane!

Posted: 27 Nov 2011 10:35 PM PST

Back to the future with the strangest flying machine

Sunday, November 27, 2011

CrazyEngineers Forum - Mechanical & Civil Engineering

Rack and Pinion Tooth Design

Posted: 26 Nov 2011 07:25 PM PST

Hey everyone, I found this forum while trying to do some research on rack and pinion tooth design. I'm having trouble getting my teeth to match up and I'm hoping I can get some help. My only concern at the moment is making the teeth match so that I can create a 3D model. I was attempting to get dimensions for the addendum and dedendum as well as the tooth thickness based on my pitch circle radius (1 inch), a certain number of teeth (arbitrary for now) and a pressure angle of 20 degrees. If someone could please help me out with finding formulas for my tooth geometry based on the dimensions I have, I would really appreciate it. Also, if you are aware of any useful resources that may help me out, please send them my way.

Thanks.

Saturday, November 26, 2011

CrazyEngineers Forum - Mechanical & Civil Engineering

China: The train that never stops at a station.

Posted: 25 Nov 2011 09:00 PM PST

This was posted by kevinm in CR4 forum:

http://www.wimp.com/chinatrain/#

CR4 - Thread: The China Train that Doesn't Stop

Friday, November 25, 2011

CrazyEngineers Forum - Other Engineering Trades

Rain Water Harvesting - Transforming Nicaragua

Posted: 25 Nov 2011 04:16 AM PST

BBC News - How rainwater harvesting is helping Nicaraguan farmers

Tuesday, November 22, 2011

CrazyEngineers Forum - Chemical & Metallurgy Engineering

World's Lightest Material @ 0.9 mg/cc!

Posted: 22 Nov 2011 12:07 AM PST

US scientists stake a claim for the world's lightest material