AOPA Pilot Magazine - August 2021 - 88

RUDDER & WRENCH
as mentioned above, so only three times
as much volume is needed. But there is
still the problem of designing the tanks
to withstand a pressure of 700 atmospheres.
Ideally, tanks would be highly
symmetric shapes like spheres, or the
domed cylinders that are used in the
Toyota Mirai.
That means not all the space in the
wings can be used, and the volume for
hydrogen storage will be even lower,
reduced by about 20 percent. Flexible
wing structures will only be possible if
relatively small tanks are used. Since
three times the volume will be needed
and the weight of the tank is about the
same as a tank of the same volume filled
with avgas, there will be a considerable
weight penalty-so in practice, not all the
available space in the wing can be used.
The real difficulties with hydrogen
are storing it, and managing refueling.
Hydrogen is very flammable and although
the flame shoots upwards, the ease with
which it ignites and the fact that the
flame is invisible make it a serious hazard.
Storing liquid hydrogen for long
periods requires carefully constructed
tanks with inbuilt refrigeration, like the
tank NASA uses at the Kennedy Space
Center. Handling hydrogen at pressures
of 700 to 800 atmospheres requires special
couplings with refueling only being
done by trained personnel under close
supervision.
It would appear that hydrogen is not
practical for longer-range intercontinental
aircraft. Although in principle light or
short-range aircraft have enough space in
the wing, in practice either the range or
payload would be reduced because of the
weight of the hydrogen tanks. The real
problems are the difficulty of storing a
liquid at extremely low temperatures or
a gas at very high pressures.
" The only problems with hydrogen
are how to make it, how to store it and
how to transport it-other than that it's
wonderful! " says my colleague, chemistry
professor Tom Moore. And professor
of materials Peter Crozier likes to say that
" The best place for a hydrogen atom is
attached to a carbon atom. " Peter Rez
is an Arizona State University physics professor
from Scottsdale who flies a Mooney.
88
AOPA PILOT / August 2021
https://www.aerospacereports.com/ https://www.aerospacereports.com/ https://vrefpub.com/

AOPA Pilot Magazine - August 2021

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

Contents
AOPA Pilot Magazine - August 2021 - Intro
AOPA Pilot Magazine - August 2021 - BB1
AOPA Pilot Magazine - August 2021 - BB2
AOPA Pilot Magazine - August 2021 - Cover1
AOPA Pilot Magazine - August 2021 - Cover2
AOPA Pilot Magazine - August 2021 - Contents
AOPA Pilot Magazine - August 2021 - 2
AOPA Pilot Magazine - August 2021 - 3
AOPA Pilot Magazine - August 2021 - 4
AOPA Pilot Magazine - August 2021 - 5
AOPA Pilot Magazine - August 2021 - 6
AOPA Pilot Magazine - August 2021 - 7
AOPA Pilot Magazine - August 2021 - 8
AOPA Pilot Magazine - August 2021 - 9
AOPA Pilot Magazine - August 2021 - 10
AOPA Pilot Magazine - August 2021 - 11
AOPA Pilot Magazine - August 2021 - 12
AOPA Pilot Magazine - August 2021 - 13
AOPA Pilot Magazine - August 2021 - 14
AOPA Pilot Magazine - August 2021 - 15
AOPA Pilot Magazine - August 2021 - 16
AOPA Pilot Magazine - August 2021 - 17
AOPA Pilot Magazine - August 2021 - 18
AOPA Pilot Magazine - August 2021 - 19
AOPA Pilot Magazine - August 2021 - 20
AOPA Pilot Magazine - August 2021 - 21
AOPA Pilot Magazine - August 2021 - 22
AOPA Pilot Magazine - August 2021 - 23
AOPA Pilot Magazine - August 2021 - 24
AOPA Pilot Magazine - August 2021 - 25
AOPA Pilot Magazine - August 2021 - 26
AOPA Pilot Magazine - August 2021 - 27
AOPA Pilot Magazine - August 2021 - 28
AOPA Pilot Magazine - August 2021 - 29
AOPA Pilot Magazine - August 2021 - 30
AOPA Pilot Magazine - August 2021 - 31
AOPA Pilot Magazine - August 2021 - 32
AOPA Pilot Magazine - August 2021 - 33
AOPA Pilot Magazine - August 2021 - 34
AOPA Pilot Magazine - August 2021 - 35
AOPA Pilot Magazine - August 2021 - 36
AOPA Pilot Magazine - August 2021 - 37
AOPA Pilot Magazine - August 2021 - 38
AOPA Pilot Magazine - August 2021 - 39
AOPA Pilot Magazine - August 2021 - 40
AOPA Pilot Magazine - August 2021 - 41
AOPA Pilot Magazine - August 2021 - 42
AOPA Pilot Magazine - August 2021 - 43
AOPA Pilot Magazine - August 2021 - 44
AOPA Pilot Magazine - August 2021 - 45
AOPA Pilot Magazine - August 2021 - 46
AOPA Pilot Magazine - August 2021 - 47
AOPA Pilot Magazine - August 2021 - 48
AOPA Pilot Magazine - August 2021 - 49
AOPA Pilot Magazine - August 2021 - 50
AOPA Pilot Magazine - August 2021 - 51
AOPA Pilot Magazine - August 2021 - 52
AOPA Pilot Magazine - August 2021 - 53
AOPA Pilot Magazine - August 2021 - 54
AOPA Pilot Magazine - August 2021 - 55
AOPA Pilot Magazine - August 2021 - 56
AOPA Pilot Magazine - August 2021 - 57
AOPA Pilot Magazine - August 2021 - 58
AOPA Pilot Magazine - August 2021 - 59
AOPA Pilot Magazine - August 2021 - 60
AOPA Pilot Magazine - August 2021 - 61
AOPA Pilot Magazine - August 2021 - 62
AOPA Pilot Magazine - August 2021 - 63
AOPA Pilot Magazine - August 2021 - 64
AOPA Pilot Magazine - August 2021 - 65
AOPA Pilot Magazine - August 2021 - 66
AOPA Pilot Magazine - August 2021 - 67
AOPA Pilot Magazine - August 2021 - 68
AOPA Pilot Magazine - August 2021 - 69
AOPA Pilot Magazine - August 2021 - 70
AOPA Pilot Magazine - August 2021 - 71
AOPA Pilot Magazine - August 2021 - 72
AOPA Pilot Magazine - August 2021 - 73
AOPA Pilot Magazine - August 2021 - 74
AOPA Pilot Magazine - August 2021 - 75
AOPA Pilot Magazine - August 2021 - 76
AOPA Pilot Magazine - August 2021 - 77
AOPA Pilot Magazine - August 2021 - 78
AOPA Pilot Magazine - August 2021 - 79
AOPA Pilot Magazine - August 2021 - 80
AOPA Pilot Magazine - August 2021 - 81
AOPA Pilot Magazine - August 2021 - 82
AOPA Pilot Magazine - August 2021 - 83
AOPA Pilot Magazine - August 2021 - 84
AOPA Pilot Magazine - August 2021 - 85
AOPA Pilot Magazine - August 2021 - 86
AOPA Pilot Magazine - August 2021 - 87
AOPA Pilot Magazine - August 2021 - 88
AOPA Pilot Magazine - August 2021 - 89
AOPA Pilot Magazine - August 2021 - 90
AOPA Pilot Magazine - August 2021 - 91
AOPA Pilot Magazine - August 2021 - 92
AOPA Pilot Magazine - August 2021 - 93
AOPA Pilot Magazine - August 2021 - 94
AOPA Pilot Magazine - August 2021 - 95
AOPA Pilot Magazine - August 2021 - 96
AOPA Pilot Magazine - August 2021 - 97
AOPA Pilot Magazine - August 2021 - 98
AOPA Pilot Magazine - August 2021 - 99
AOPA Pilot Magazine - August 2021 - 100
AOPA Pilot Magazine - August 2021 - 101
AOPA Pilot Magazine - August 2021 - 102
AOPA Pilot Magazine - August 2021 - 103
AOPA Pilot Magazine - August 2021 - 104
AOPA Pilot Magazine - August 2021 - 105
AOPA Pilot Magazine - August 2021 - 106
AOPA Pilot Magazine - August 2021 - 107
AOPA Pilot Magazine - August 2021 - 108
AOPA Pilot Magazine - August 2021 - 109
AOPA Pilot Magazine - August 2021 - 110
AOPA Pilot Magazine - August 2021 - 111
AOPA Pilot Magazine - August 2021 - 112
AOPA Pilot Magazine - August 2021 - Cover3
AOPA Pilot Magazine - August 2021 - Cover4
https://www.nxtbook.com/nxtbooks/aopa/pilot_202111
https://www.nxtbook.com/nxtbooks/aopa/pilot_202110
https://www.nxtbook.com/nxtbooks/aopa/pilot_202109
https://www.nxtbook.com/nxtbooks/aopa/pilot_202108
https://www.nxtbook.com/nxtbooks/aopa/pilot_202107
https://www.nxtbook.com/nxtbooks/aopa/pilot_202106
https://www.nxtbook.com/nxtbooks/aopa/pilot_202105
https://www.nxtbook.com/nxtbooks/aopa/pilot_202104
https://www.nxtbook.com/nxtbooks/aopa/pilot_202103
https://www.nxtbook.com/nxtbooks/aopa/pilot_202102
https://www.nxtbook.com/nxtbooks/aopa/pilot_202101
https://www.nxtbook.com/nxtbooks/aopa/pilot_202012
https://www.nxtbook.com/nxtbooks/aopa/pilot_202011
https://www.nxtbook.com/nxtbooks/aopa/pilot_202010
https://www.nxtbook.com/nxtbooks/aopa/pilot_202009
https://www.nxtbook.com/nxtbooks/aopa/pilot_202008
https://www.nxtbook.com/nxtbooks/aopa/pilot_202007
https://www.nxtbook.com/nxtbooks/aopa/pilot_202006
https://www.nxtbook.com/nxtbooks/aopa/pilot_202005
https://www.nxtbook.com/nxtbooks/aopa/pilot_202004
https://www.nxtbook.com/nxtbooks/aopa/pilot_202003
https://www.nxtbook.com/nxtbooks/aopa/pilot_202002
https://www.nxtbook.com/nxtbooks/aopa/pilot_202001
https://www.nxtbook.com/nxtbooks/aopa/pilot_201912
https://www.nxtbook.com/nxtbooks/aopa/pilot_201911
https://www.nxtbook.com/nxtbooks/aopa/pilot_201910
https://www.nxtbook.com/nxtbooks/aopa/pilot_201909
https://www.nxtbook.com/nxtbooks/aopa/pilot_201908
https://www.nxtbook.com/nxtbooks/aopa/pilot_201907
https://www.nxtbook.com/nxtbooks/aopa/pilot_201906
https://www.nxtbook.com/nxtbooks/aopa/pilot_201905
https://www.nxtbook.com/nxtbooks/aopa/pilot_201904
https://www.nxtbook.com/nxtbooks/aopa/pilot_201903
https://www.nxtbook.com/nxtbooks/aopa/pilot_201902
https://www.nxtbook.com/nxtbooks/aopa/pilot_201901
https://www.nxtbook.com/nxtbooks/aopa/pilot_201812
https://www.nxtbook.com/nxtbooks/aopa/pilot_201811
https://www.nxtbook.com/nxtbooks/aopa/pilot_201810
https://www.nxtbook.com/nxtbooks/aopa/pilot_201809
https://www.nxtbook.com/nxtbooks/aopa/pilot_201808
https://www.nxtbook.com/nxtbooks/aopa/pilot_201807
https://www.nxtbook.com/nxtbooks/aopa/pilot_201806
https://www.nxtbook.com/nxtbooks/aopa/pilot_201805
https://www.nxtbook.com/nxtbooks/aopa/pilot_201804
https://www.nxtbook.com/nxtbooks/aopa/pilot_201803
https://www.nxtbook.com/nxtbooks/aopa/pilot_201802
https://www.nxtbook.com/nxtbooks/aopa/pilot_201801
https://www.nxtbook.com/nxtbooks/aopa/pilot_201712
https://www.nxtbook.com/nxtbooks/aopa/pilot_201711
https://www.nxtbook.com/nxtbooks/aopa/pilot_201710
https://www.nxtbook.com/nxtbooks/aopa/pilot_201709
https://www.nxtbook.com/nxtbooks/aopa/pilot_201708
https://www.nxtbook.com/nxtbooks/aopa/pilot_201707
https://www.nxtbook.com/nxtbooks/aopa/pilot_201706
https://www.nxtbook.com/nxtbooks/aopa/pilot_201705
https://www.nxtbook.com/nxtbooks/aopa/pilot_201704
https://www.nxtbook.com/nxtbooks/aopa/pilot_201703
https://www.nxtbook.com/nxtbooks/aopa/pilot_201702
https://www.nxtbook.com/nxtbooks/aopa/pilot_201701
https://www.nxtbook.com/nxtbooks/aopa/pilot_201612
https://www.nxtbook.com/nxtbooks/aopa/pilot_201611
https://www.nxtbook.com/nxtbooks/aopa/pilot_201610
https://www.nxtbook.com/nxtbooks/aopa/pilot_201609
https://www.nxtbook.com/nxtbooks/aopa/pilot_201608
https://www.nxtbook.com/nxtbooks/aopa/pilot_201607
https://www.nxtbook.com/nxtbooks/aopa/pilot_201606
https://www.nxtbook.com/nxtbooks/aopa/pilot_201605
https://www.nxtbook.com/nxtbooks/aopa/pilot_201604
https://www.nxtbook.com/nxtbooks/aopa/pilot_201603
https://www.nxtbook.com/nxtbooks/aopa/pilot_201602
https://www.nxtbook.com/nxtbooks/aopa/pilot_201601
https://www.nxtbook.com/nxtbooks/aopa/pilot_201512
https://www.nxtbook.com/nxtbooks/aopa/pilot_201511
https://www.nxtbook.com/nxtbooks/aopa/pilot_201510
https://www.nxtbook.com/nxtbooks/aopa/pilot_201509
https://www.nxtbook.com/nxtbooks/aopa/pilot_201508
https://www.nxtbook.com/nxtbooks/aopa/pilot_201507
https://www.nxtbook.com/nxtbooks/aopa/pilot_201506
https://www.nxtbook.com/nxtbooks/aopa/pilot_201505
https://www.nxtbook.com/nxtbooks/aopa/pilot_201504
https://www.nxtbook.com/nxtbooks/aopa/pilot_201503
https://www.nxtbook.com/nxtbooks/aopa/pilot_201502
https://www.nxtbook.com/nxtbooks/aopa/pilot_201501
https://www.nxtbook.com/nxtbooks/aopa/pilot_201412
https://www.nxtbook.com/nxtbooks/aopa/pilot_201411
https://www.nxtbook.com/nxtbooks/aopa/pilot_201410
https://www.nxtbook.com/nxtbooks/aopa/pilot_201409
https://www.nxtbook.com/nxtbooks/aopa/pilot_201408
https://www.nxtbook.com/nxtbooks/aopa/pilot_201407
https://www.nxtbook.com/nxtbooks/aopa/pilot_201406
https://www.nxtbook.com/nxtbooks/aopa/pilot_201405
https://www.nxtbook.com/nxtbooks/aopa/pilot_201404
https://www.nxtbook.com/nxtbooks/aopa/pilot_201403
https://www.nxtbook.com/nxtbooks/aopa/pilot_201402
https://www.nxtbook.com/nxtbooks/aopa/pilot_201401
https://www.nxtbook.com/nxtbooks/aopa/pilot_201312
https://www.nxtbook.com/nxtbooks/aopa/pilot_201311
https://www.nxtbook.com/nxtbooks/aopa/pilot_201310
https://www.nxtbook.com/nxtbooks/aopa/pilot_201309
https://www.nxtbook.com/nxtbooks/aopa/pilot_201308
https://www.nxtbook.com/nxtbooks/aopa/pilot_201307
https://www.nxtbook.com/nxtbooks/aopa/pilot_201306
https://www.nxtbook.com/nxtbooks/aopa/pilot_201305
https://www.nxtbook.com/nxtbooks/aopa/pilot_201304
https://www.nxtbook.com/nxtbooks/aopa/pilot_201303
https://www.nxtbook.com/nxtbooks/aopa/pilot_201302
https://www.nxtbook.com/nxtbooks/aopa/pilot_201301
https://www.nxtbook.com/nxtbooks/aopa/pilot_201212
https://www.nxtbook.com/nxtbooks/aopa/pilot_201211
https://www.nxtbook.com/nxtbooks/aopa/pilot_201210
https://www.nxtbook.com/nxtbooks/aopa/pilot_201209
https://www.nxtbook.com/nxtbooks/aopa/pilot_201208
https://www.nxtbook.com/nxtbooks/aopa/pilot_201207
https://www.nxtbook.com/nxtbooks/aopa/pilot_201206
https://www.nxtbook.com/nxtbooks/aopa/pilot_201205
https://www.nxtbook.com/nxtbooks/aopa/pilot_201204
https://www.nxtbook.com/nxtbooks/aopa/pilot_201203
https://www.nxtbook.com/nxtbooks/aopa/pilot_201202
https://www.nxtbook.com/nxtbooks/aopa/pilot_201201
https://www.nxtbook.com/nxtbooks/aopa/pilot_201112
https://www.nxtbook.com/nxtbooks/aopa/pilot_201111
https://www.nxtbook.com/nxtbooks/aopa/pilot_201110
https://www.nxtbook.com/nxtbooks/aopa/pilot_201109
https://www.nxtbook.com/nxtbooks/aopa/pilot_201108
https://www.nxtbook.com/nxtbooks/aopa/pilot_201107
https://www.nxtbook.com/nxtbooks/aopa/pilot_201106
https://www.nxtbook.com/nxtbooks/aopa/pilot_201105
https://www.nxtbook.com/nxtbooks/aopa/pilot_201104
https://www.nxtbook.com/nxtbooks/aopa/pilot_201103
https://www.nxtbook.com/nxtbooks/aopa/pilot_201103_test
https://www.nxtbook.com/nxtbooks/aopa/pilot_201102
https://www.nxtbook.com/nxtbooks/aopa/pilot_201011demo
https://www.nxtbook.com/nxtbooks/aopa/pilot_201011
https://www.nxtbook.com/nxtbooks/aopa/pilot0308
https://www.nxtbookmedia.com