David Crosthwait was born in May 27, 1898 and holds 39 patents in the U.S. and 80 patents internationally for his advances in air ventilation, and heating and cooling methods for such devices such as air conditioning, refrigeration, and heating systems. In 1913 he earned his Bachelors of Science
Category Archives: Aerospace
V.C.B
HOW CAN CHECK THE VACCUM
See-through Laptop Display
Among the news from CES: a prototype AMOLED laptop display sports 40% transparency, so one can see through the screen. Two questions: first, what does the display look like from the backside? Second, how and why does a screen that appears harder to use than a normal opaque display evoke so much exci
Developing Nonlethal Weapons
All kinds of nonlethal weapons are being perfected. These include laser dazzlers to warn the opposition to retreat, long-range acoustic devices that deliver ear-piercing warnings, electromagnetic pulse (EMP) cannons that disable vehicles, and more. Notably effective against civilian uprisings like r
No Place for Screens?
Automakers want us to have internet-connected dashboard computers. Should drivers be able to check their Facebook pages while on the highway? Do you find yourself texting, talking, or otherwise distracted while driving? Car makers are giving drivers Internet access because (they say) that's what dri
NECCESSITY OF RCCB IN A DC SYSSTEM?
is it neccessary to connect a rccb on an outgoing feeder of a dc system?...
inverter
hey guys!!!!!! i saw an inverter ckt which i cant undrstnd one thing.in that ckt they used 13 0 13/230V transformer(for stepup the supply from battery,after conversion to A.C).but the amazing thing is they connected the battery red terminal directly to the 0 terminal of transformer and the other two
Cheap Timer
Looking for very cheap timer circuit
Spec
Supply is 9v needs to be activated by simple push button (no hold) & have a switch selector to enable timer to operate for 1 min, 5min & 15min.
Looking for this to be extreemly small due to space avaialble so No relays
Thanks
Pipe Robot
My associate has designed a wireless piping robot that can take continuous 360 degree photos and measurements good for 300 ft. travel. Present unit is suitable for diameters of 6 inches to 16 inches. We are interested in adding to the capabilities so if you have any suggestions on added features fo
Industrial Lighting
How to Calculate Inside PLant, Conveyor Gantries, MCC Room & control Room Lighting in 300KW Industrial Plant including no. of Fixtures & Position of Light Points.
Green sand
Good day,
If i where to add new silica sand on green sand system, what are the factors to consider? or what test do i have to conduct in order to know how many silica sand will i put into green sand? can anyone please help me, thanks.
Clear liquid polysulfonate?
Hi...im arizoni im looking for liquid polysulfonate,, with appearance clear.... Pls inform me if you know, where i can buy it...? thanks
Google to Enlist NSA to Help it Ward Off Cyberattacks
From Wash Post Technology:
The world's largest Internet search company and the world's most powerful electronic surveillance organization are teaming up in the name of cybersecurity.
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South African Budget Airline's Fantastic Self-Explanatory Livery
From Boing Boing:
Stef sez, "Kulula (South Africa's low fare airline), have recently released this fantastic new aircraft livery entitled 'Flying 101'. Each part of the aircraft is labelled with humorous captions such as 'Loo (or mile-high initiation chamber)' and 'Landing gear (co
Camouflaging An Airplane Factory
From mental_floss Blog:
I found these pictures on Think or Thwim and was blown away. Back in the 40s, during the war, the Lockheed Air Terminal in Burbank was not only Los Angeles' main airport, but a massive facility that produced warplanes from the P-38 to the B-17 bomber. Lo
Rebecca Cole
Rebecca Cole broke through many barriers for both women and African Americans. Cole was incredibly dedicated to helping less fortunate women and giving them access to an education. During her medical education, Cole herself benefited from the work of others who wished to give women access to
USB Electronic Key Impressioner could help you be gone in 60 milliseconds
From Engadget:
If you're stealing a car these days, there's a good chance you're not bothering to actually pick the locks, but if you are, your job is about to get a little easier. A device called the Electronic Key Impressioner is inserted into a car door and scans the position of
EPA Biofuels Guidelines Could Spur Production of Ethanol from Corn
From Wash Post Technology:
The nation's farmers got a big boost Wednesday when the Obama administration issued new biofuels guidelines that could open the way for large increases in the production of corn-based ethanol.
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Garrett A. Morgan
Garrett A. Morgan was born in Kentucky in 1877. He was the seventh of eleven children born to Sydney Morgan, a former slave who was freed in 1863. Garrett Morgan spent many years teaching himself to repair sewing machines before opening his own business specializing in sewing machine sales and re
<I>Avatar</I> Shmavatar?
Mechanical exoskeletons are being advanced by military and industrial organizations to amplify human muscle functions. Related research has been funded by governments and corporations but the only visible evidence of such technology appears in Hollywood film fantasies such as Avatar. Do you think th