AOPA Pilot Magazine - February 2021 - 86

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forward fuselage is for aerodynamics; it is
not load bearing.
THE TUBING IN A PIPER

*Certain points and purchases restrictions apply, see full Rewards
Terms and Conditions for full details at AOPA.org/creditcard.
1 Rewards points can be redeemed for Cash Back or other items provided through AOPA Pilot Rewards. A Cash Back redemption is applied
as a statement credit. The statement credit will reduce your balance
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Clyde Smith Jr., aka " The Cub Doctor "
(cubdoctor.com), said that Piper always
used 1025 mild steel tubing aft of the baggage section in every tube-frame airplane
it built right up until it stopped production in 1982.
Two alloys of steel aircraft tubing are
used in general aviation aircraft: SAE 1025
and SAE 4130. 1025 is a plain steel with
only carbon as its alloying element; technically it's a " low hardenability carbon
86 | AOPA PILOT February 2021

steel with low tensile strength; " 4130,
often called chrome moly tubing, also
contains molybdenum and chromium as
strengthening agents. 4130 is stronger in
shear strength, fatigue strength, and hardness; 1025 has better rust resistance. Both
alloys are very easy to weld.
Why did Piper continued to use 1025
tubing? Smith explained that it was less
expensive, easier to bend, and the greater
strength of the 4130 was not required aft
of the baggage area. That helps explain
why the vertical stabilizer may need to
be " tweaked to trim " in Piper and other
early tube-style airplanes.


http://www.AOPA.org/creditcard http://www.cubdoctor.com http://www.AOPA.org/creditcard

AOPA Pilot Magazine - February 2021

Table of Contents for the Digital Edition of AOPA Pilot Magazine - February 2021

Contents
AOPA Pilot Magazine - February 2021 - Intro
AOPA Pilot Magazine - February 2021 - Cover1
AOPA Pilot Magazine - February 2021 - Cover2
AOPA Pilot Magazine - February 2021 - Contents
AOPA Pilot Magazine - February 2021 - 2
AOPA Pilot Magazine - February 2021 - 3
AOPA Pilot Magazine - February 2021 - 4
AOPA Pilot Magazine - February 2021 - 5
AOPA Pilot Magazine - February 2021 - 6
AOPA Pilot Magazine - February 2021 - 7
AOPA Pilot Magazine - February 2021 - 8
AOPA Pilot Magazine - February 2021 - 9
AOPA Pilot Magazine - February 2021 - 10
AOPA Pilot Magazine - February 2021 - 11
AOPA Pilot Magazine - February 2021 - 12
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AOPA Pilot Magazine - February 2021 - 14
AOPA Pilot Magazine - February 2021 - 15
AOPA Pilot Magazine - February 2021 - 16
AOPA Pilot Magazine - February 2021 - 17
AOPA Pilot Magazine - February 2021 - 18
AOPA Pilot Magazine - February 2021 - 19
AOPA Pilot Magazine - February 2021 - 20
AOPA Pilot Magazine - February 2021 - 21
AOPA Pilot Magazine - February 2021 - 22
AOPA Pilot Magazine - February 2021 - 23
AOPA Pilot Magazine - February 2021 - 24
AOPA Pilot Magazine - February 2021 - 25
AOPA Pilot Magazine - February 2021 - 26
AOPA Pilot Magazine - February 2021 - 27
AOPA Pilot Magazine - February 2021 - 28
AOPA Pilot Magazine - February 2021 - 29
AOPA Pilot Magazine - February 2021 - 30
AOPA Pilot Magazine - February 2021 - 31
AOPA Pilot Magazine - February 2021 - 32
AOPA Pilot Magazine - February 2021 - 33
AOPA Pilot Magazine - February 2021 - 34
AOPA Pilot Magazine - February 2021 - 35
AOPA Pilot Magazine - February 2021 - 36
AOPA Pilot Magazine - February 2021 - 37
AOPA Pilot Magazine - February 2021 - 38
AOPA Pilot Magazine - February 2021 - 39
AOPA Pilot Magazine - February 2021 - 40
AOPA Pilot Magazine - February 2021 - 41
AOPA Pilot Magazine - February 2021 - 42
AOPA Pilot Magazine - February 2021 - 43
AOPA Pilot Magazine - February 2021 - 44
AOPA Pilot Magazine - February 2021 - 45
AOPA Pilot Magazine - February 2021 - 46
AOPA Pilot Magazine - February 2021 - 47
AOPA Pilot Magazine - February 2021 - 48
AOPA Pilot Magazine - February 2021 - 49
AOPA Pilot Magazine - February 2021 - 50
AOPA Pilot Magazine - February 2021 - 51
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AOPA Pilot Magazine - February 2021 - 53
AOPA Pilot Magazine - February 2021 - 54
AOPA Pilot Magazine - February 2021 - 55
AOPA Pilot Magazine - February 2021 - 56
AOPA Pilot Magazine - February 2021 - 57
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AOPA Pilot Magazine - February 2021 - 60
AOPA Pilot Magazine - February 2021 - 61
AOPA Pilot Magazine - February 2021 - 62
AOPA Pilot Magazine - February 2021 - 63
AOPA Pilot Magazine - February 2021 - 64
AOPA Pilot Magazine - February 2021 - 65
AOPA Pilot Magazine - February 2021 - 66
AOPA Pilot Magazine - February 2021 - 67
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AOPA Pilot Magazine - February 2021 - 69
AOPA Pilot Magazine - February 2021 - 70
AOPA Pilot Magazine - February 2021 - 71
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AOPA Pilot Magazine - February 2021 - 73
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AOPA Pilot Magazine - February 2021 - 77
AOPA Pilot Magazine - February 2021 - 78
AOPA Pilot Magazine - February 2021 - 79
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AOPA Pilot Magazine - February 2021 - Cover3
AOPA Pilot Magazine - February 2021 - Cover4
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