Pratt & Whitney's new Super Engine

• Modern aircraft are all about the turbofan engine


• The Turbofan combines massive amounts of power, with decent efficiency and impressive reliability.


• Even the non-exotics are amazing works of engineering

Here's how a traditional turbofan works:

• A Jet engine compresses air, adds fuel, burns it, then is thrusted forward by the expansion of exhaust gasses


• A "Fan" moves huge amounts of air, thrusting itself forward (Think of the props on a Quadcopter)


• A Turbofan combines the two: a HUGE fan in front of, and drive by a jet engine

In a modern high-bypass turbofan you have:

1. The Fan


2. The low-pressure compressor


3. The High pressure compressor


4. The Combustion chamber


5. High pressure turbine


6. Low pressure turbine

Here's the key

• The low pressure turbine is connected by a shaft to the low pressure compressor and fan


• The high pressure turbine is connected to the high-pressure compressor
  
  
  • So, as the gasses and burned and expanded, they provide the power to the fan and compressors that allow for the gasses to be burned and expanded.

This is a good system... but the folks at Pratt and Whitney just made it obsolete!

The Pratt & Whitney "PurePower" Geared Turbofan

• They burn 16% less fuel for the same thrust


• They put out less NOX for the same thrust


• The create 75% less noise while on the ground


• It cost 30 years and $10 billion to make them work

Why is it so much better?

• Let's talk about propellors.
  
  
  • Small props that spin quickly, vs large props that spin slowly
  
  
  • Large is more efficient, and less noisy
    
    
    • But we wouldn't use larger fans on Turbofans because the speeds as which you needed to spin the shaft for the compressors was spinning too fast for the ideal-sized fan.
    
    
    • So... P&W added a gear box (It's 20 inches in diameter and weighs 250lbs)

They used a orbital gear design to step down the speed of the low-pressure turbine/compressor shaft.

• This allows the fan to spin much more slowly, but with far more torque


• Slower speeds with more torque means they can use a more aggressive fan that moves more air at lower speeds.
  
  
  • While a traditional turbofan might have a 5:1 bypass... PurePower does 12:1

So... more efficient, more thorough burn (less pollutants), and MUCH quieter on the ground.

WinDroid & Google History

AMIDuOS!

• Created by AMI - "American Megatrends - The company that so many of us know from their BIOS days"


• They were founded in 1985 by Pat Sarma and S. Shankar (who will be on Triangulation in the future)


• Their first customer was "PC's Limited" which became "Dell Computers"

But this is DuOS...

• Unlike "Bluestacks" which is an Android App Emulator, DuOS is full-Android in either a VM or a Container


• It gives FULL access to all the major peripherals (this was a major problem with emulators)
  
  
  • Keyboard, Mouse, touchscreen, microphone, ambient light sensor, accelerometers, compass, orientation, etc.
  
  
  • It also supposed variable screen sizes.

Notes:

1. There are two versions: AMIDuOS 1.1 (Running Android Jellybean) and AMIDuOS 2.0 (Running Android Lollipop)


2. Jellybean will cost you $10 // Lollipop will cost $15


3. Once you install, you WILL need to install Google Apps and Services

Let's talk about what Google stores in your online history

1. Websites


2. Voice Commands/Searches


3. Connected Devices


4. Location History


5. YouTube Video History


6. YouTube Search History

Feedback

M

These show notes have been truncated due to length. For the full show notes, visit https://twit.tv/shows/know-how/episodes/168

Hosts: Fr. Robert Ballecer, SJ and Bryan Burnett

Sponsors:

• lynda.com/knowhow


• holhom.com/twit