AOPA Pilot Magazine - December 2020 - 16

LETTERS

Jerry Sorrell
AOPA 1781910
Kelso, Washington

Tale of two flights
Richard McSpadden's article
touched on the question asked
of many aviators: What's it like?
Without describing the actual
experience, he still provided an
answer. In youth we're mesmerized by the hardware, but
as time passes, it's our own
experiences and the kinship
we build with similar-minded
others that answer the question. I don't recall all the tail
numbers but remember every
person I've flown with.

HANGAR TALK

Andrew Deal
AOPA 4236814
Gilroy, California

P&E

Bravo to Mike Busch (as usual). Mike almost

SAVVY MAINTENANCE
Savvy Maintenance coverage
sponsored by AIRCRAFT SPRUCE

OPINION

always publishes a technical masterwork every

|

Your engine's
lifeblood

time he types, but "Savvy Maintenance: Your

There's a lot more to piston aircraft engine oil
than you might think
BY MIKE BUSCH

APPLY NOW FOR
AOPA'S FLEXIBLE
AVIATION LOAN

Engine's Lifeblood" was a high-water mark even

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LEIGH CAULFIELD

I used a metal cutting saw
to remove the outer two feet of
the leading edge. Most importantly, examination of sheet
metal aft of the spar showed
no wrinkles or sheared rivets.
Replacement parts included
two nose ribs and leading
edge skin, all off the shelf from
Van's Aircraft. Those who
know the sheet metal details
of the RV-4 would probably
spot the repair. The fiberglass wing tip was damaged,
but this was not difficult to
repair. Total out of pocket and
my labor was $220.

WHEN IT COMES TO piston aircraft engines,

LUBRICATION VS. FRICTION AND WEAR

the role of engine oil is complicated. It lubricates moving parts to reduce friction and
wear, but that's only one of six key functions
it performs, and perhaps not even the most
important one.
The lubrication requirements of slowturning direct-drive Continentals and
Lycomings that most of us fly behind
are really quite modest compared to the
high-revving engines in our automobiles.
Lubrication demands tend to vary with the
square of rpm, so a car engine with a 7,000
rpm redline has vastly more demanding
lubrication requirements than an aircraft
engine with a 2,700 rpm redline does.

Friction occurs because even the smoothest metal surfaces have microscopic peaks
and valleys known as asperities. Whenever
surfaces come in contact, these asperities
adhere to one another via tiny micro-welds.
If those surfaces are in relative motion, the
micro-welds constantly fracture and reform, resulting in friction and wear. Friction
is the resistance to relative motion and wear
is the loss of material. Both are due to the
fracture of the micro-welds.
The purpose of lubrication is to reduce
friction and wear on the engine's moving
parts. There are several different kinds of
lubrication. One important kind is called

Go to

aopa.org/financemytraining
to apply today.

AOPA's Flexible Aviation Loan can be put
to work right now to get you on your way as
a better trained, more proficient pilot.

tions I have had about engine oil for decades
(but was too lazy to fully research) were clearly
answered in this article. Great stuff!
From AOPA's member forums

aopa.org/pilot AOPA PILOT | 97

Thank you for your service in
the Air Force, and thank you for
your skill in making the reader
feel as if they were right there in
the cockpit with you (both in the
F-16 and your '93 Super Cub). I
have recently got back into flying after a six-year hiatus and
this article inspired me to go fly.

Hangar buddy Doug was at the
controls of N182EF, broke from
formation overhead, and recited
the "missing man prayer." The
bird is pictured in the AOPA
Pilot December 2019 article on
Mission Flight. Papa Jake smiles
today on the service N182EF has
had for people in need.

Rob Shujman
AOPA 5642607
Miami Beach, Florida

J. Marc Haney
AOPA 6919095
Covina, California

Aerial tributes

Headset grime

Ten years ago, my father-inlaw passed away suddenly. The
morning hangar club organized
a "missing man" tribute to my
father-in-law over the graveside
service; my son Nolan was on the
ground with a handheld radio, so
the entire family could listen in.

I have a Zulu 3 headset. When
it was almost two years old the
ear seals started cracking. Since
I belong to a club, I never leave
the headsets in the plane and
they are only used 70 hours a
year, approximately. So, I called
Lightspeed. I was told that body

"Senior Photographer Mike Fizer and I get the opportunity to do many
amazing things," says Senior Features Editor JULIE SUMMERS WALKER.
"But being stuffed in the back of a Twin Commander with Christmas
presents floor to ceiling was a Christmas memory I'll always cherish." Aircraft of every shape and size are packed tight with Christmas
presents to fly to needy children across Michigan during Operation
Good Cheer ("SANTA IS A GA PILOT," page 58). "The roar of our Twin
Commander's engines got the attention of the children and families
on the ramp at Roben-Hood Airport. And all came out to unload the
aircraft. " The aptly named airport in Big Rapids wasn't for the legendary British rogue but for two World War I pilots-Maj. Douglass Roben
and Lt. Daniel Hood. "The bounty of gifts, joy, and homemade sweets
and treats made this adventure truly rich; the only poor are those who
don't have the opportunity to fly for this great cause."

16 | AOPA PILOT December 2020

oils deteriorate the material on
the seals and that I should wipe
them down after each use. Now
I carry a package of wet wipes in
my case and clean the seals and
head cushion after each use. I
will see if that really helps.
Joseph Padronaggio
AOPA 889050
Parrish, Florida

Erratum
Jerome Stanislaus ("Pilot
Briefing") is a U.S. Air Force
flight engineer, not a pilot.
AOPA Pilot regrets the error.
We welcome your comments.
Send letters to Editor, AOPA
Pilot, 421 Aviation Way, Frederick, Maryland 21701 or pilot@
aopa.org. Letters may be
edited for length and style.


http://www.aopa.org/financemytraining http://www.aopa.org/pilot

AOPA Pilot Magazine - December 2020

Table of Contents for the Digital Edition of AOPA Pilot Magazine - December 2020

Contents
AOPA Pilot Magazine - December 2020 - Intro
AOPA Pilot Magazine - December 2020 - Cover1
AOPA Pilot Magazine - December 2020 - Cover2
AOPA Pilot Magazine - December 2020 - Contents
AOPA Pilot Magazine - December 2020 - 2
AOPA Pilot Magazine - December 2020 - 3
AOPA Pilot Magazine - December 2020 - 4
AOPA Pilot Magazine - December 2020 - 5
AOPA Pilot Magazine - December 2020 - 6
AOPA Pilot Magazine - December 2020 - 7
AOPA Pilot Magazine - December 2020 - 8
AOPA Pilot Magazine - December 2020 - 9
AOPA Pilot Magazine - December 2020 - 10
AOPA Pilot Magazine - December 2020 - 11
AOPA Pilot Magazine - December 2020 - 12
AOPA Pilot Magazine - December 2020 - 13
AOPA Pilot Magazine - December 2020 - 14
AOPA Pilot Magazine - December 2020 - 15
AOPA Pilot Magazine - December 2020 - 16
AOPA Pilot Magazine - December 2020 - 17
AOPA Pilot Magazine - December 2020 - 18
AOPA Pilot Magazine - December 2020 - 19
AOPA Pilot Magazine - December 2020 - 20
AOPA Pilot Magazine - December 2020 - 21
AOPA Pilot Magazine - December 2020 - 22
AOPA Pilot Magazine - December 2020 - 23
AOPA Pilot Magazine - December 2020 - 24
AOPA Pilot Magazine - December 2020 - 25
AOPA Pilot Magazine - December 2020 - 26
AOPA Pilot Magazine - December 2020 - 27
AOPA Pilot Magazine - December 2020 - 28
AOPA Pilot Magazine - December 2020 - 29
AOPA Pilot Magazine - December 2020 - 30
AOPA Pilot Magazine - December 2020 - 31
AOPA Pilot Magazine - December 2020 - 32
AOPA Pilot Magazine - December 2020 - 33
AOPA Pilot Magazine - December 2020 - 34
AOPA Pilot Magazine - December 2020 - 35
AOPA Pilot Magazine - December 2020 - 36
AOPA Pilot Magazine - December 2020 - 37
AOPA Pilot Magazine - December 2020 - 38
AOPA Pilot Magazine - December 2020 - 39
AOPA Pilot Magazine - December 2020 - 40
AOPA Pilot Magazine - December 2020 - 41
AOPA Pilot Magazine - December 2020 - 42
AOPA Pilot Magazine - December 2020 - 43
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AOPA Pilot Magazine - December 2020 - 45
AOPA Pilot Magazine - December 2020 - 46
AOPA Pilot Magazine - December 2020 - 47
AOPA Pilot Magazine - December 2020 - 48
AOPA Pilot Magazine - December 2020 - 49
AOPA Pilot Magazine - December 2020 - 50
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AOPA Pilot Magazine - December 2020 - Cover3
AOPA Pilot Magazine - December 2020 - Cover4
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