Test Bank Solution Manual for Helicopter Private Pilot Rated 100%
10 views 0 purchase
Course
Private pilot
Institution
Private Pilot
Test Bank Solution Manual for Helicopter Private Pilot Rated 100%
What is an airfoil? - Answers Is any surface producing more lift than drag when passing through the air ar a suitable angle.
Describe the leading edge of an airfoil? - Answers It lead the airfoil through the air. Rounded shape on ...
Test Bank Solution Manual for Helicopter Private Pilot Rated 100%
What is an airfoil? - Answers Is any surface producing more lift than drag when passing through the air
ar a suitable angle.
Describe the leading edge of an airfoil? - Answers It lead the airfoil through the air. Rounded shape on a
helicopter.
Describe the trailing edge of an airfoil? - Answers It trails behind the leading edge. Small tipped shape on
a helicopter.
What are the two types of rotor blades? - Answers Symmetrical and asymmetrical.
Describe the upper and lower cambers of each rotor blade type. - Answers Symmetrical- upper and
lower cambers are the same shape.
Asymmetrical- upper and lower cambers are not the same.
What is the cord line on an airfoil? - Answers It is an imaginary line from the leading edge to the trailing
edge of an airfoil.
What is the plane of rotation on an airfoil? - Answers The actual plane the rotor blade is moving through
the air.
Define relative wind. - Answers It is airflow relative to an airfoil.
What is angle of attack? - Answers It is the angle between the airfoil cord line and the resultant relative
wind.
What is induced flow (downwash)? - Answers Downward flow of air. Most pronounced at a hover with
no wind.
Describe the mechanical angle AKA pitch angle or angle of incident. - Answers It is the angle between
the cord line of a main or tail rotor blade and it's rotor disk.
Describe how an airfoil produced lift. Venturi and Bernoulli's - Answers Venturi - velocity is increased as
static pressure is decreases.
Bernoulli's - as air speed increases pressure decreases. (Low pressure on top of airfoil and high pressure
on bottom of airfoil).
What percentage of lift is achieved from Bernoulli's principle? - Answers 70%. The rest is from Newton's
third law.
, Describe Newton's third law of motion. - Answers For every action there is an equal and opposite
reaction.
What percentage of lift comes from Newton's third law? - Answers 30%
Describe parasite drag. - Answers Is the non lifting components of the helicopter. (Cabin, rotor mast, tail,
landing gear). It is present any time the helicopter is moving through the air.
Describe induced drag. - Answers It is generated by airflow circulation around the rotor blade as it
creates lift. AKA a by product of lift.
What are the two types of profile drag? - Answers Form drag
Skin friction
Describe form drag. - Answers It results from the turbulent wake caused by separation of airflow from
the surface of a structure. AKA the design of the airfoil, or object.
Describe skin friction. - Answers It is caused by surface roughness.
How do you get your total drag curve? - Answers Average all drags together.
The best rate do climb for an R-22 is? - Answers 53 knots.
How is drag considered by the manufacturer when determining the best rate of climb and autorotative
decent speeds? - Answers By averaging all of the drags and determining the total drag curve.
What are the 4 forces acting upon an aircraft? - Answers Lift
Weight
Thrust
Drag
Describe lift? - Answers Lift is the force that acts upward on the helicopter. Opposes weight.
Describe weight. - Answers Weight is the force of gravity that pulls down on the helicopter. It opposes
lift.
Describe thrust. - Answers It is the force that propels the aircraft in a particular direction. It opposes
drag.
Describe drag. - Answers It is the force that resists movement in any direction. It opposes thrust.
What is translating tendency? - Answers tendency of a single rotor helicopter to drift laterally while
hovering. Also called tail rotor drift.
What are the three elements of blade coning? - Answers Weight
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller TutorJosh. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.99. You're not tied to anything after your purchase.
