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l A throttle must be held in MIL (or greater)
for approximately 3 seconds in order for
the automatic function to completely retract
the speedbrake. Anything less will
cause partial retraction.
Figure 2-53. Speedbrakes
ORIGINAL 2-94
NAVAIR 01.F14AALb1
NOMENCLATURE
0
Speed brake switch
3
2 SPEED BRAKE indicator
FUNCTION
EXT- Momentary position used for partial or full extension. When
released, switch returns to center (hold) positlon.
RET- Normal position of switch. Retracts and maintains speed
brakes closed.
- Partial extension (hold)
- Full extension (6OO).
•l
IN - Full retracted position.
- Speed brakes power is off.
Note
Automatic retraction of speed brakes occurs
when either or both throttles are at MIL.
Figure 2-54. SpeedbrakeC ontrol and Indicator
2-95 ORIGINAL
NAVAIR 0%F’l
The speedbrakewsi ll start to blowback( close)a t
approximatel4y0 0 knotsa ndw ill cominueto wardt he
closedp ositiona s aimpeedin creasetso preventS tructurald
amageA. reductionin airspeewd ill not automaticallyc
auseth e speedbrakteos e xtendto the originally
commandepdo sition.
2.23 FLIGHT CQblTRfX SYSTEMS
Flight wntrol is achievedth rougha n irreversible,
hydraulicp owers ystemo peratebdy a controls ti& and
rudderp edalsA. ircraftp itchi s controlledb y symmetricald
eflectiono f the horizontasl tabiliiemR. oll wntrol
is effectedb y differentiasl tabilizedr eflectionasn da ugmentedb
y spoilersa t wing-sweepp ositionsle sst han
62”. Directionacl ontroli s providedb y dual rudders.
Duringp ower approacmh aneuversth, e aircraftf lightpath
canb e controlledth roughs ymmetrics poilerd isplacemenbt
y the pilot selectingd irect lift control.
Controls urfacein dicatorsa res hownin Figure2 -55.
Theh orizontasl tabilizear ndr uddersa rep oweredb y
tbet light andc ombinehdy dmulics ystemasn dw ntrolled
by pushrodsa ndb ellcranksA. third independenflitg ht
control hydraulic power source is provided by the
backupm odule.S poilerc ontroli s effectedb y en electmhydraulic.
f ly-by-wire systema nd poweredb y the
combinedh ydraulics ystem( inboards poilema) ndo utboards
poilerm odule( outboards poilers).
TheA FCSi ncludesa stabilitya ugmentatiosny stem
an autopilota nda uxilii wntrol fimctionsf or spoiler
wntrol, ruddera uthorityc ontrol,l aterals tick suthority
wnttol, and Mach trim wmpensation.
2.23.1 LongitudlmaI 0mQroIL. ongitudinalcontrol
(Figure2 -56) is providedb y symmetricd eflectiono f
independentalyc tuatedh orizontasl tabilizersC. ontrol
stickm otioni s trsnsmittedtoth es tabiliirpower actuatorsb
ypushrodasn dbellcmnkstodurdttmdemactuators
independentplyo weredb y the fligbt andc ombinehdy -
dmulii systemsT. hep owera ctuatorcso ntrolt he stabilizers
symmetrically for longitudinal control and
differentiallyfor~~~~.~is~lishedby
mech8nicallsyu mmingpitchandrollwmmandsatthe
pitch-rollm ixer assemblyh.J onlm= stick-to-stabilizer
gearingp rovidesa ppropriates tick sensitivityf or responsive
and smooth control. Longitudinal system
authotityis showyi n Figure2 -57.
2.23.1.1 Longltudlna! FoeP. ArtitTciafl eel devices
in the controls ystemp rovidet he pilot with forcec ues
andf eedbackA. spring-loadecda mr indr ollera ssembly
producesb reakoutf orce when the stick is di.splwc~I
from neutratl rim andp rovidesin cressmSst ick forces
proportionatol controls tickdisplacemenCto. ntrosl tick
forces,p roportionatlo normala cceleratio(n8 forces)
and pitch accelemtiona,m producedb y fore and aft
bobweightsA. irmutt overstmssefr-osm abrupts tick inputsareminimi&
byaneddycurmntdamperthatre
sistsla rge,r apidc ontrold eflections.
2.23.9.2 kr~@~dlru,al Mm. Longitudinal trim is
providedb y varyingt hen eutrapl ositiono f thec ama nd
roller feel assembly with an electromechanical
screwjacakc tuatorT. hem anuapl itcht rim buttono nt he
sticki sa fiveqositions witch,s pringlo adedto thec enter
(off) position (Figme 2-B). The fore and aft switch
positionsp roducew tmspondingn osedowann dn oseup
trim, respectivelTy.h em anuatlr im switchis d eactivated
whent hea utopiloits engaged.
2.23.d.3 Mach Trh. Mach trim wntml is provided
by the ARCSa nd is contimumslye ngagedto provide
automaticM ach trim compensatiodnu ringt mnsonic
ands upersonifcli ght. A failureo f Macht rim wmpensationis
indicatedb y theM ACH TRIM advisoryli ght.
Transienfta ihuesc anb er esetb y depressintgh e MASTSR
RESETp ushbutton.
~emsyllaal~dcbFCSautombtic~and~htrim
~3~tuatiocr instelledin parallelw itb the Sightw ntrol
　
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