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The Go/No-Go Decision

Instead of one big decision, it’s actually a series of smaller ones. And as with all choices, there are consequences we have to understand and accept. ....

United States , Paul Sanchez , New England , Airborne Nexrad , Aeronautical Knowledge , ஒன்றுபட்டது மாநிலங்களில் , பால் சான்செஸ் , புதியது இங்கிலாந்து , வான்செலவு சார்ந்த அறிவு ,

FPVFC Response AC 91-57C - sUAS News - The Business of Drones

4 August 2021
Below is our response to the FAA’s Advisory Circular 91-57c regarding the changes slated for the Exception for Limited Recreational Operations of Unmanned Aircraft. Overall, this Advisory Circular addresses the process of how to go about applying as a Community Based Organization (CBO) and the details regarding what the FAA would like to see from the organizations and educational institutions regarding safety rules and enforcement of certain actions.
As you can see from the sections noted below, there is a lot that we would like to see addressed. To reference the AC, please see Advisory Circular 91-57c. ....

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What's Your Angle? - AVweb

AVweb
Whatâs Your Angle?
Pitch plus power still equals performance. Once we decide on the desired combination for different flight phases, we can use it again and again.
In the April issue of
Aviation Safety, we explored the theories of generating lift from Bernoulli and Newton, and how neither of them alone fully explains how airfoils work. Bernoulliâs basic understanding of low pressure above an airfoil is correct, but the math is wrong and his assumptions are faulty. He also doesnât explain inverted flight. Meanwhile, Newton has a decent handle on using angle of attack to generate lift and his Third Lawâ every action has an equal and opposite reactionâtidily handles inverted flight, but he has little to offer us in explaining low pressure above the airfoil. ....

United States , Doug Mclean , Aviation Safety , Third Law , Aeronautical Knowledge , Scientific American , ஒன்றுபட்டது மாநிலங்களில் , டக் மக்லீந் , விமான போக்குவரத்து பாதுகாப்பு , மூன்றாவது சட்டம் , வான்செலவு சார்ந்த அறிவு , அறிவியல் அமெரிக்கன் ,

The Physics of a Fighter Jet Rainbow!

By NewEnglandBob (not verified) on 08 Sep 2010 #permalink
Thanks for a lesson relatively easy to understand.
By ThirtyFiveUp (not verified) on 08 Sep 2010 #permalink
The quote is from Leonardo Da Vinci. Nice pics though, Thanks for sharing them.
By Tom (not verified) on 08 Sep 2010 #permalink
Excellent post! I had seen photo s like that before, but never realised what was causing the rainbow.
@Tom, actually I think Ethan got it right. The quote (one of my favourite aviation quotes) is commonly attributed to da Vinci. However, no-one can actually point to a verifiable da Vinci source for it - see the comments on this website, and the author s attempts to verify the source (near the bottom) http://www.skygod.com/quotes/ ....

Bernardo Malfitano , Barnardo Malfitano , Fire Rainbow , Aeronautical Knowledge , தீ வானவில் , வான்செலவு சார்ந்த அறிவு ,