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26 Cards in this Set
- Front
- Back
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What is the most important property of air?
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Density
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What is the symbol for density?
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Rho
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What are the units for density?
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slugs/ft^3
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What is standard sea level density?
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.002377 slugs/ft3
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When does density get cut in half from sea level?
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22,000 ft
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Density ratio?
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Rho / Rho original
Pressure ratio (delta) / Temp ratio (theta) |
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Which two temperature scales are NOT based on absolute zero?
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F and C
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What are the standard day temps for Rankine and Kelvin?
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519 R
288 K |
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What does ICET stand for?
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Indicated
Calibrated Equivalent True |
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Define the CET in ICET.
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Calibrated - indicated corrected for instrument and position error)
Equivalent - Calibrated corrected for compressibility True - Equiv corrected for density |
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Is the compressibility correction always negative?
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Yes
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What does TAS =?
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EAS X 1/ square root of density ratio
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What is Bernoulli's equation?
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H = P + q
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What are three types of airfoils?
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Symmetrical
Cambered Laminar Flow |
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What type of airflow uses a 6,7, or 8 digit code?
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Laminar flow
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Standard Rankine is F + __?
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460
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Standard Kelvn is C + __?
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273
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What is the mnemonic for converting to absolute?
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CalvinKlein and FReshman
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What is the continuity equation?
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p1A1V1 = same with other datas
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In H = P + q, define the variables.
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H = total pressure
P = static pressure q = dynamic pressure |
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What is the formula for mass air flow?
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Q = pAV
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Max camber and max thickness are the same. True/False?
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False
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What is max camber?
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max distance bt mean camber line and the chord line
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What are the four main variables of airfoils?
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shape, thickness, location of max thickness, leading edge radius
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In the NACA airfoil 2415, what do the numbers stand for?
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2 - Mac camber in % chord
4 - location of max camber 15 - max thickness in % chord |
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What are the advantages of Laminar flow airflows?
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less drag at high speeds
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