Flight Training - November 2019 - 14

PREFLIGHT WHAT AM I?

BY IAN J. TWOMBLY

ENGINES

PISTON POWER
Reciprocating engine types

Old school
For nostalgia you can't beat a
radial engine. The flat disc of
cylinders in front harkens to
an era of silk scarves and big
biplanes. These beasts drink oil
as if crude only costs $2.50 a
barrel-which it once did.

BETTER MOUSETRAP
ROTAX IMPROVES ON ENGINE QUIRKS

IF YOU FLY A CESSNA, PIPER, CIRRUS, OR DIAMOND YOU ARE ALMOST GUARANTEED TO FLY

behind a Lycoming or Continental engine. These two storied engine brands have an overwhelming share of the market, but Austrian manufacturer Rotax is gaining ground, thanks to
good value and modern designs.
An ideal aircraft engine is light, reliable, efficient, and works well in unforgiving environments. Rotax began by producing two-stroke engines for off-road use and slowly transitioned
to motorgliders and ultralights after the company saw pilots repurposing snowmobile engines.
That lineage still puts off some pilots, but the 912 ULS and 915 iS represent a better power-toweight ratio and fuel efficiency than anything yet seen in light aircraft-in addition to offering
modern features such as electronic ignition. As these engines proliferate, more mechanics are
becoming comfortable working on them, and pilots are getting used to their operation. Because
Rotax engines are cooled by both liquid and air, they have a radiator, and the coolant level must
be verified; some require "burping" the oil reservoir by pulling the propeller through before
checking the oil level; and they run at almost double the rpm of a Continental or Lycoming.
Happy owners ignore the differences in light of more useful load and a substantial fuel
savings. Now that's progress.
ian.twombly@aopa.org

14  FLIGHT TRAINING NOVEMBER 2019

Traditional
The classic four-cylinder
horizontally opposed (the O in
the name designation) training
engine has been around for
more than 80 years. Reliable
and widespread, you may be
flying the same O-320 your
grandparents flew.

Modern
Rotax is one of a few modern
manufacturers that is seeking to
challenge our notions of what
an aircraft engine can do. Rotax
engines exist today mostly in
Experimental aircraft or LSAs,
although more certificated manufacturers are eyeing Rotax.



Flight Training - November 2019

Table of Contents for the Digital Edition of Flight Training - November 2019

Contents
Flight Training - November 2019 - Intro
Flight Training - November 2019 - Cover1
Flight Training - November 2019 - Cover2
Flight Training - November 2019 - Contents
Flight Training - November 2019 - 2
Flight Training - November 2019 - 3
Flight Training - November 2019 - 4
Flight Training - November 2019 - 5
Flight Training - November 2019 - 6
Flight Training - November 2019 - 7
Flight Training - November 2019 - 8
Flight Training - November 2019 - 9
Flight Training - November 2019 - 10
Flight Training - November 2019 - 11
Flight Training - November 2019 - 12
Flight Training - November 2019 - 13
Flight Training - November 2019 - 14
Flight Training - November 2019 - 15
Flight Training - November 2019 - 16
Flight Training - November 2019 - 17
Flight Training - November 2019 - 18
Flight Training - November 2019 - 19
Flight Training - November 2019 - 20
Flight Training - November 2019 - 21
Flight Training - November 2019 - 22
Flight Training - November 2019 - 23
Flight Training - November 2019 - 24
Flight Training - November 2019 - 25
Flight Training - November 2019 - 26
Flight Training - November 2019 - 27
Flight Training - November 2019 - 28
Flight Training - November 2019 - 29
Flight Training - November 2019 - 30
Flight Training - November 2019 - 31
Flight Training - November 2019 - 32
Flight Training - November 2019 - 33
Flight Training - November 2019 - 34
Flight Training - November 2019 - 35
Flight Training - November 2019 - 36
Flight Training - November 2019 - 37
Flight Training - November 2019 - 38
Flight Training - November 2019 - 39
Flight Training - November 2019 - 40
Flight Training - November 2019 - 41
Flight Training - November 2019 - 42
Flight Training - November 2019 - 43
Flight Training - November 2019 - 44
Flight Training - November 2019 - 45
Flight Training - November 2019 - 46
Flight Training - November 2019 - 47
Flight Training - November 2019 - 48
Flight Training - November 2019 - 49
Flight Training - November 2019 - 50
Flight Training - November 2019 - 51
Flight Training - November 2019 - 52
Flight Training - November 2019 - 53
Flight Training - November 2019 - 54
Flight Training - November 2019 - 55
Flight Training - November 2019 - 56
Flight Training - November 2019 - Cover3
Flight Training - November 2019 - Cover4
https://www.nxtbook.com/nxtbooks/aopa/ft_202406
https://www.nxtbook.com/nxtbooks/aopa/ft_202407
https://www.nxtbook.com/nxtbooks/aopa/ft_202404
https://www.nxtbook.com/nxtbooks/aopa/ft_202403
https://www.nxtbook.com/nxtbooks/aopa/ft_202401
https://www.nxtbook.com/nxtbooks/aopa/ft_202311
https://www.nxtbook.com/nxtbooks/aopa/ft_202309
https://www.nxtbook.com/nxtbooks/aopa/ft_202308
https://www.nxtbook.com/nxtbooks/aopa/ft_202307
https://www.nxtbook.com/nxtbooks/aopa/ft_202306
https://www.nxtbook.com/nxtbooks/aopa/ft_202305
https://www.nxtbook.com/nxtbooks/aopa/ft_202304
https://www.nxtbook.com/nxtbooks/aopa/ft_202303
https://www.nxtbook.com/nxtbooks/aopa/ft_202301
https://www.nxtbook.com/nxtbooks/aopa/ft_202211
https://www.nxtbook.com/nxtbooks/aopa/ft_202209
https://www.nxtbook.com/nxtbooks/aopa/ft_202208
https://www.nxtbook.com/nxtbooks/aopa/ft_202207
https://www.nxtbook.com/nxtbooks/aopa/ft_202206
https://www.nxtbook.com/nxtbooks/aopa/ft_202205
https://www.nxtbook.com/nxtbooks/aopa/ft_202204
https://www.nxtbook.com/nxtbooks/aopa/ft_202203
https://www.nxtbook.com/nxtbooks/aopa/ft_202201
https://www.nxtbook.com/nxtbooks/aopa/ft_202111
https://www.nxtbook.com/nxtbooks/aopa/ft_202109
https://www.nxtbook.com/nxtbooks/aopa/ft_202108
https://www.nxtbook.com/nxtbooks/aopa/ft_202107
https://www.nxtbook.com/nxtbooks/aopa/ft_202106
https://www.nxtbook.com/nxtbooks/aopa/ft_202104
https://www.nxtbook.com/nxtbooks/aopa/ft_202105
https://www.nxtbook.com/nxtbooks/aopa/ft_202103
https://www.nxtbook.com/nxtbooks/aopa/ft_202101
https://www.nxtbook.com/nxtbooks/aopa/ft_202011
https://www.nxtbook.com/nxtbooks/aopa/ft_202009
https://www.nxtbook.com/nxtbooks/aopa/ft_202008
https://www.nxtbook.com/nxtbooks/aopa/ft_202007
https://www.nxtbook.com/nxtbooks/aopa/ft_202006
https://www.nxtbook.com/nxtbooks/aopa/ft_202005
https://www.nxtbook.com/nxtbooks/aopa/ft_202004
https://www.nxtbook.com/nxtbooks/aopa/ft_202003
https://www.nxtbook.com/nxtbooks/aopa/ft_202001
https://www.nxtbook.com/nxtbooks/aopa/ft_201912
https://www.nxtbook.com/nxtbooks/aopa/ft_201911
https://www.nxtbook.com/nxtbooks/aopa/ft_201910
https://www.nxtbook.com/nxtbooks/aopa/ft_201909
https://www.nxtbook.com/nxtbooks/aopa/ft_201908
https://www.nxtbook.com/nxtbooks/aopa/ft_201907
https://www.nxtbook.com/nxtbooks/aopa/ft_201906
https://www.nxtbook.com/nxtbooks/aopa/ft_201905
https://www.nxtbook.com/nxtbooks/aopa/ft_201904
https://www.nxtbook.com/nxtbooks/aopa/ft_201903
https://www.nxtbook.com/nxtbooks/aopa/ft_201902
https://www.nxtbook.com/nxtbooks/aopa/ft_201901
https://www.nxtbook.com/nxtbooks/aopa/ft_201812
https://www.nxtbook.com/nxtbooks/aopa/ft_201811
https://www.nxtbook.com/nxtbooks/aopa/ft_201810
https://www.nxtbook.com/nxtbooks/aopa/ft_201809
https://www.nxtbook.com/nxtbooks/aopa/ft_201808
https://www.nxtbook.com/nxtbooks/aopa/ft_201807
https://www.nxtbook.com/nxtbooks/aopa/ft_201806
https://www.nxtbook.com/nxtbooks/aopa/ft_201805
https://www.nxtbook.com/nxtbooks/aopa/ft_201804
https://www.nxtbook.com/nxtbooks/aopa/ft_201803
https://www.nxtbook.com/nxtbooks/aopa/ft_201802
https://www.nxtbook.com/nxtbooks/aopa/ft_201801
https://www.nxtbook.com/nxtbooks/aopa/ft_201712
https://www.nxtbook.com/nxtbooks/aopa/ft_201711
https://www.nxtbook.com/nxtbooks/aopa/ft_201710
https://www.nxtbook.com/nxtbooks/aopa/ft_201709
https://www.nxtbook.com/nxtbooks/aopa/ft_201708
https://www.nxtbook.com/nxtbooks/aopa/ft_201707
https://www.nxtbook.com/nxtbooks/aopa/ft_201706
https://www.nxtbook.com/nxtbooks/aopa/ft_201705
https://www.nxtbook.com/nxtbooks/aopa/ft_201704
https://www.nxtbook.com/nxtbooks/aopa/ft_201703
https://www.nxtbook.com/nxtbooks/aopa/ft_201702
https://www.nxtbook.com/nxtbooks/aopa/ft_201701
https://www.nxtbook.com/nxtbooks/aopa/ft_201612
https://www.nxtbook.com/nxtbooks/aopa/ft_201611
https://www.nxtbook.com/nxtbooks/aopa/ft_201610
https://www.nxtbook.com/nxtbooks/aopa/ft_201609
https://www.nxtbook.com/nxtbooks/aopa/ft_201608
https://www.nxtbook.com/nxtbooks/aopa/ft_201607
https://www.nxtbook.com/nxtbooks/aopa/ft_201606
https://www.nxtbook.com/nxtbooks/aopa/ft_201605
https://www.nxtbook.com/nxtbooks/aopa/ft_201604
https://www.nxtbook.com/nxtbooks/aopa/ft_201603
https://www.nxtbook.com/nxtbooks/aopa/ft_201602
https://www.nxtbook.com/nxtbooks/aopa/ft_201601
https://www.nxtbook.com/nxtbooks/aopa/ft_201512
https://www.nxtbook.com/nxtbooks/aopa/ft_201511
https://www.nxtbook.com/nxtbooks/aopa/ft_201510
https://www.nxtbook.com/nxtbooks/aopa/ft_201509
https://www.nxtbook.com/nxtbooks/aopa/ft_201508
https://www.nxtbook.com/nxtbooks/aopa/ft_201507
https://www.nxtbook.com/nxtbooks/aopa/ft_201506
https://www.nxtbook.com/nxtbooks/aopa/ft_201505
https://www.nxtbook.com/nxtbooks/aopa/ft_201504
https://www.nxtbook.com/nxtbooks/aopa/ft_201503
https://www.nxtbook.com/nxtbooks/aopa/ft_201502
https://www.nxtbook.com/nxtbooks/aopa/ft_201501
https://www.nxtbook.com/nxtbooks/aopa/ft_201412
https://www.nxtbook.com/nxtbooks/aopa/ft_201411
https://www.nxtbook.com/nxtbooks/aopa/ft_201410
https://www.nxtbook.com/nxtbooks/aopa/ft_201409
https://www.nxtbook.com/nxtbooks/aopa/ft_201408
https://www.nxtbook.com/nxtbooks/aopa/ft_201407
https://www.nxtbook.com/nxtbooks/aopa/ft_201406
https://www.nxtbook.com/nxtbooks/aopa/ft_201405
https://www.nxtbook.com/nxtbooks/aopa/ft_201404
https://www.nxtbook.com/nxtbooks/aopa/ft_201403
https://www.nxtbook.com/nxtbooks/aopa/ft_201402
https://www.nxtbook.com/nxtbooks/aopa/ft_201401
https://www.nxtbook.com/nxtbooks/aopa/ft_201312
https://www.nxtbook.com/nxtbooks/aopa/ft_201311
https://www.nxtbook.com/nxtbooks/aopa/ft_201310
https://www.nxtbook.com/nxtbooks/aopa/ft_201309
https://www.nxtbook.com/nxtbooks/aopa/ft_201308
https://www.nxtbook.com/nxtbooks/aopa/ft_201307
https://www.nxtbook.com/nxtbooks/aopa/ft_201306
https://www.nxtbook.com/nxtbooks/aopa/ft_201305
https://www.nxtbook.com/nxtbooks/aopa/ft_201304
https://www.nxtbook.com/nxtbooks/aopa/ft_201303
https://www.nxtbook.com/nxtbooks/aopa/ft_201302
https://www.nxtbook.com/nxtbooks/aopa/ft_201301
https://www.nxtbook.com/nxtbooks/aopa/ft_201212
https://www.nxtbook.com/nxtbooks/aopa/ft_201211
https://www.nxtbook.com/nxtbooks/aopa/ft_201210
https://www.nxtbook.com/nxtbooks/aopa/ft_201209
https://www.nxtbook.com/nxtbooks/aopa/ft_201208
https://www.nxtbook.com/nxtbooks/aopa/ft_201207
https://www.nxtbook.com/nxtbooks/aopa/ft_201206
https://www.nxtbook.com/nxtbooks/aopa/ft_201205
https://www.nxtbook.com/nxtbooks/aopa/ft_201204
https://www.nxtbook.com/nxtbooks/aopa/ft_201203
https://www.nxtbook.com/nxtbooks/aopa/ft_201202
https://www.nxtbook.com/nxtbooks/aopa/ft_201201
https://www.nxtbook.com/nxtbooks/aopa/ft_201112
https://www.nxtbook.com/nxtbooks/aopa/ft_201111
https://www.nxtbook.com/nxtbooks/aopa/ft_201110
https://www.nxtbook.com/nxtbooks/aopa/ft_201109
https://www.nxtbook.com/nxtbooks/aopa/ft_201108
https://www.nxtbook.com/nxtbooks/aopa/ft_201107
https://www.nxtbook.com/nxtbooks/aopa/ft_201106
https://www.nxtbook.com/nxtbooks/aopa/ft_201105
https://www.nxtbook.com/nxtbooks/aopa/ft_201104
https://www.nxtbook.com/nxtbooks/aopa/ft_201103
https://www.nxtbookmedia.com