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Home✈️Aircraft🚁HelicopterHelicopter Main Discussion › FAA Helicopter Flying Handbook
01-02-2015 01:52 AM  6 years ago
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denwag

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Norman, Indiana

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FAA Helicopter Flying Handbook
For those of you not familiar with this publication I posted a link below.

This is a really good book (89 meg pdf) with more compiled information on flying a real helicopter than I have seen anywhere else on the internet.

You wont be disappointing if you download it.

Regards
Denwag

https://www.faa.gov/regulations_pol...ng_handbook.pdf
IRCHA 4816 AMA 530319 www.berryridgegraphics.com
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01-04-2015 06:53 AM  6 years ago
jgunpilot

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Pollock, LA

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Thanks for the link to this great info!
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01-04-2015 08:58 AM  6 years ago
EEngineer

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TX

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Old...2012...and has nothing to do with RC...
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01-04-2015 12:18 PM  6 years ago
revmix

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NJ

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Old...2012
same principle
and has nothing to do with RC
same aerodynamics, system & controls
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01-04-2015 05:32 PM  6 years ago
denwag

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Norman, Indiana

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Old...2012...and has nothing to do with RC...

Its still an excellent book for the uneducated like me. It answers many of the questions that I had about Full scale flying and just makes my scale flying more enjoyable. Above is a screenshot of one on the many excellent diagrams in the book.

Regards
Denwag
IRCHA 4816 AMA 530319 www.berryridgegraphics.com
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01-04-2015 09:01 PM  6 years ago
1helimech

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NW Fla....

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AW, so they really do beat the air into submission ..... Just remember God made Heli. Mechs. so Pilots can have a hero too ..... I dream of a better world, A world where a chicken's crossing a road IS NOT questioned
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01-04-2015 11:12 PM  6 years ago
Steve Graham

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Denver, CO

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Old...2012...and has nothing to do with RC...

Wrong.
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01-04-2015 11:22 PM  6 years ago
rexxigpilot

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Fairly technical for the average Joe/non-tech type. The concept of vectors and Bernoulli's equation will make many glaze over. I bet Michael Huerta wouldn't understand it!
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01-04-2015 11:41 PM  6 years ago
denwag

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Norman, Indiana

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I thought the chapter on autorotation, vortex ring state, and retreating blade stall were explained very clearly for the layman

I had no idea there were so many hazards to full scale flying

Regards
denwag
IRCHA 4816 AMA 530319 www.berryridgegraphics.com
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01-04-2015 11:57 PM  6 years ago
KissMyBlades

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Manchester, CT

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Yes some of the concepts are daunting, but it all comes down to how much you WANT to know - do you want to just fly or do you want to understand what something is doing and why. The biggest differences between flying a Robby and flying with 2 fingers is I can't feel what's happening, I have to see it and I'm no longer reacting from one orientation - the principles are all same, though. If you want to know more, you can look at any of the FAA flight or mechanic books as they're all relevant to RC flight, just scaled down, but if not they are not easy concepts to learn on your own.
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01-05-2015 02:50 AM  6 years ago
EEngineer

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TX

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Bernoulli's equation
Bernoulli's equation applies to fluid mechanics and not air...

Bernouilli's equation doesn't explain how a symmetrical airfoil develops lift....nor does it explain how a fixed wing aircraft(symmetical airfoil or not) develops lift when flying inverted.

And, I agree that Herr Huerta wouldn't understand....

What political hack would?....Goes for his #2, also....
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01-05-2015 05:33 AM  6 years ago
Santiago P

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Dayton

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Well, actually

Bernoulli's equation does apply to air at lower speeds or mach numbers where the air is treated as an inconpressible fluid, (where M <0.3). As you go faster and compresibility effects become more prevalent Bernoulli's is no longer valid.

S
Team Minicopter - PeakAircraft.com
FUTABA.USA - Team Kontronik - Scorpion Motors-
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01-05-2015 06:05 AM  6 years ago
EEngineer

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TX

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Well, actually
Now matter what they're modeling intent might be....

Air(or any gas) is compressible....
Bernoulli's equation does apply to air at lower speeds or mach numbers where the air is treated as an inconpressible fluid, (where M <0.3).
As I mentioned, Bernoulli's equation is mis-applied when using a gas as the medium, rather than fluid as Bernoulli intended...

It can't be used to explain why I have flown an RC J3 Cub(72" wingspan)...with it's "Clark Y" non-symmetrical airfoil....

Inverted...as one likes....until the fuel ran out...

If the Bernoulli effect applied...in fact it would contribute to negative lift(when the aircraft is inverted).....

Instead, it's an aircraft's angle of attack(AoA) that is the major component of lift(by far)...and was easily verified by the "inverted J3 Cub effect"...flying at a mere 25-30 Mph...

The AoA was to its limits(to avoid a stall).

The Bernoulli effect fails to explain this.....

At any full-scale airshow, one can watch the AoA when those pilots perform a low-speed inverted pass.....as added verification of the mis-application of the Bernoulli principal when used to describe an aircraft's "lift"....as opposed to the AoA principal.

FWIW
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01-05-2015 06:51 AM  6 years ago
Santiago P

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Dayton

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It can't be used to explain why I have flown an RC J3 Cub(72" wingspan)...with it's "Clark Y" non-symmetrical airfoil....

Inverted...as one likes....until the fuel ran out...
If the Bernoulli effect applied...in fact it would contribute to negative lift(when the aircraft is inverted).....
You are not accounting for the fairly high angle of attack you have to sustain to very inefficiently create lift inverted, which accounts for the lower pressure you MUST create on top (and make the fluid travel faster than the bottom) to create lift along with the added drag.

The principle still stands on the inverted Clark Y.

S
Team Minicopter - PeakAircraft.com
FUTABA.USA - Team Kontronik - Scorpion Motors-
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01-05-2015 07:01 AM  6 years ago
EEngineer

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TX

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Santiago.....
very inefficiently create lift inverted, which accounts for the lower pressure you MUST create on top (and make the fluid travel faster than the bottom) to create lift along with the added drag.
Inefficient as such lift may be(with the added drag)...it is the major contributor to lift....no matter what airfoil is used...

Santo, given upright or inverted, it's the AoA that induces the positive air pressure delta that provides lift...whether upright or inverted....

And not negative pressure above that induces the majority of lift.

Think positive....

jk
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01-05-2015 07:05 AM  6 years ago
EEngineer

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TX

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Santiago....you're goin' down the road...and hold your hand out the window...

Apply hand positive pitch, and you hit your arm on the upper cardoor window frame...negativ hand pitch, bang it on the lower frame....

AoA.....
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01-05-2015 04:22 PM  6 years ago
1helimech

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NW Fla....

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The hand out the window is called "flat plate" effect...just so you know... I dream of a better world, A world where a chicken's crossing a road IS NOT questioned
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01-05-2015 04:26 PM  6 years ago
Santiago P

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Dayton

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I am not sticking any flat plates out the window, a bird may nest or poop on it...

going bck to my vortex lattice crunchy cereal

S
Team Minicopter - PeakAircraft.com
FUTABA.USA - Team Kontronik - Scorpion Motors-
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01-06-2015 06:44 AM  6 years ago
rexxigpilot

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Bernoulli's equation, while developed for incompressible fluids (liquids), has application to compressible fluids as well. Concepts like pressure increases as velocity decreases and vice versa still apply. One must remember that the general form of the equation uses density (Greek letter rho) instead of mass. Compressible fluids change density with changes in pressure and velocity, so the equation is not directly solvable - although changes in density can be accounted for using ideal gas law equations. But as Santiago pointed out, at lower deltas of pressure and velocity, the equation is still of use.

I mentioned Bernoulli's equation in my previous post because the equation was referenced in the FAA Handbook.
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01-06-2015 06:53 AM  6 years ago
EEngineer

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TX

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Sorry, not buying it...

Liquids are compressible to a degree...but that's another issue.

The application of Benoulli's principal to wing lift miserably fails to describe the effects that I previously posted....
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