ASK13 Flight Manual

ALEXANDER SCHLEICHER SEGELFLUGZEUGBAU

POPPENHAUSEN /RHON

Flight - and Maintenance - Manual

for the GI id er

AS - K 13

Edition

This Hondbock hos to be carried on bord of the aircraft.

It belongs to the glider

AS - K 13

...................... • ................ . Serial No •• /!I/.-:.~/!.~ .............. . Manufacturer ...•................ , ..... .

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AvP•owl ti 11or.~lolrdn ho1 be~n l!~~e oy bW lnG~ld~t and 1u~1emcnl - In ooy me lh ori;ond fut ill Geiman lar.guc~t is cv1~.c11tcl;ve.

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AS - K 13 Flight Manual

Amendments

Ne. Designation Page Dute Si(!:nntu re

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AS - K 13 Flight Manual

1. Operating Limitations

Air speeds:

Max. speed

rough air

aero tow

auto and winch tow

Weights:

Empty weight

Max. weight

Max. weight of non lifting parts

Kategory:

Limit load factor

up

down

Safety factor

Avp•utul ol 11unslo1iun hol bc•!n'dono by bell knowledge and 1udpomonr - In ony rm rh• original lul in Germon lonquopo Is au1ho11ro1rvo.

125

87

87

62

650

1060

710

2 BYS

4,0

-2,0

2,0

mph \08 kh

mph 75 kts

mph 75 k.+.s

mph .53 kt.s

lbs

lbs

lbs

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AS - K 13 Flight Manual

Center of gravity position in flight:

Leveling meirns Tangente i.o rib Nr. 3 horizontal.

Datum wing I ending edge rih 3

Max. forward 2,75 behind dn tum point

Max. rearward 9,7 " II II

Weak link in the tow cable:

Winch tow max. 2350 lbs

min. 1850 lbs

Aero tow max. 1580 lbs

min, 1060 lbs

2, Operating Directions:

Winch tow:

Max, tow speed is 62 mph.

Attention. li1 winch tow pullinµ; the stick bacl< means increase of speed, When liftinµ; off ease the stick somewhat to overcome a light ten­tency to pitch up. Best attitude in climb is with stick normal. Winch tow on the belly hocl< only.

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AS - K 13 Flight Miinun.l

Aero tow

Mn.x. towing speed is 87 111ph, \IS 1<-+~) For aero tow the nose hock is prefernhle. Pull rele1tsc till the Attrp.

Defore every take off chccl( canopy and nirbrakes for complete locking,

Adjustment of the front rudder pedals,

Pull bnck the pednls with the heels nnd loci< the adjusting link to the desired position. Adjus~ing is possible during flight too.

~pp191ul ol hunsloliun ho! bofn dono by bnl knowffdQ• and iudoomenl · - . In ony 1ou lht 01iginol ltd in 6trn1on lonQuope Is ou1houtolive.

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AS - K 13 Flight Mnnunl

In flight:

The presented v1tlues nre cnlculnted. They ore relo.ted to EAS, There hns to be consi<lered the position error, see Fig. 1. The indicated air speed rending may drop to zero when the glider is slipping or skidding due to movement of the total pressure penk from the nose to the side.

1~0

-

Fig. f.

Nose >i lol

/ )'

/

f2 /

_/ ,,,._,

/ ,1'6

,{ 0

50 100 EAS mob.

I

v /

150

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AS - K 13 Flight Mn.mtnl

Stull ing speed with an n.11 up weight

of 810 lbs is 35 mph ..30 k+~

1040 lbs is 38 mph 3:3 \c..-b

Speed II. t min si nit 40 mph 35 \.c.+.:. optim, glide 50 mph 4-2' \c..+.s

Ln.nding:

Approach speed 50 - 55 mph. (43- 4-B \c..+.s) The glide nngle can be adjusted in n. wide rn.nge with the n.irhrakes, Touch down is best with partly extended airbrakes only. The wheel hrnlrn is actuated by the n.irbrtdrn lever wlu~n fully pull cd lrnc I<.

Stalling 1tnd Spinning Bchnviour:

With st.ick full back the nircrnft. cn.n be con­trol! cd by the rudder, App L.ri ng it lu.rge n.mount. of rudder will cnuse IL spin. There hn.s t.o he considered the influence of the cent.rr of grnvi I.,;· posit.ion to the spinning chnrnct.erii:d ics. With the C.of Gr, pos. forward I.he nircr1tft will tencl to go into n spirn.l dive n.nll !111il<I up !'lflePcl very rn.pi dly. In this case t.h e n i rhrnke!'I hu.ve to be opened first before pnl ling out.,

With C. ,.,r Gr. well in the middle 1-1pi1111ing is normal and the aircrnft will recover hy giving free the contro 11 s n 1 one.

Appoowl ol 11onslo1ion ho1 bc~n oone by but koo.,.led9e and 1udocmenl - In ony case lhl origonol luJ in Germon longucge iS outhonrotive.

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AS - K 13 Flight Manual

With C, of, Gr. near the most renrwnrd po1:1ition spin recovery has to be managed by the following standard methode:

n) apply opposite rudder (i.e. against. Lhe direction of roLation of the spin):

b) pause:

c) ease the control column forward until Uw rotation ceases

d) centrnli1:1e rudder and allow nircrnfL Lo dive OU t,

At high speed there has to be watched the speed limits, When n. speed of 87 mph is surpassed in­voluntary the airhrakes should be opened slowly,

Remember: At higher speeds the nirhrnke lever force is actuating in opening sense.

Rain drops, hoar i'rost and ice wi 11 dist.urh t.he wing surface, so ,1ui te adverse flying charac­teristics may result. There fore caution is advised in such cases during approach, give enough speed mn.rgin,

Emergency Jettisoning of Canopy: To lrn.i l out., the c1in9py has to be opened n.t thC! relense knoh nf; the left side nnd pushed forwnrd out. or Llw hinge, The hinges hnve to be watched fur ensy moven.-bi li ty.

Cloud flyh1g

The glider has sufficient strnngt.h for cloud flying, Nevertheless some principal rules Rhould he con-l'li 'de red:

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AS - K 13 Flight Manual

1) Overspeed in cloud flying should be prevented in any case, There should be the rule to open the airbro.kes eo.rly o.t speeds of 65 to 75 mph,

2) Minimum equipment for cloud flying: Air speed indico.tor wii,11 pitot tube protected ago.inst icing. Sensitive altimeter Vo.rlometer Compass Turn and bnnk (power source in::1ensitive agaimd. icing). Chronometer An artificiel horizon o.nd accelerometer is recommended.

3) The ATC rules are to be observed.

4) Minimum Equipment:

Airspeed indicator ranging from 30 to 125 mph.

Altimeter Safety belt and shoulder harness. Bo.ck cushion if no parachute is carried (min, thickness 4 inch), Bo.lance - and do.ta plo. te Flight Manual.

5) Ad.justing Dato.:

The adjusting and washout - angle,s as well llfl

the control surface deflections o.re shown in the outli'ue drawing. At repo.irs care should be taken to observe the tolerances. By the particular kinematics of t~e control mechanism the aileron deflection will he in­fluenced by the elevator. With normal stick position the ni lerons have to be nor-11111.l.

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AS - K 13 Flight Mnnun.l

With pushed nnd pulled sticl< the ailerons nre some what zoomed.

The controls hnve stops:

Rudder control: Fixed stop nt the lower hinge.

Aileron control: Fixed stop n.t two hnrd wood pieces down the front seat.

Elevator contro 1: Backward - fixed stop nt the front edge of the sent, forwnrrl - fixed stop at the ground hon.rd.

Airbrnkes:

Backward: Adjustnble stop n.t the horizontal pushrod, stops ago.inst the inn.in bulkhead frame. Forward: Fixed stop, cross shaft lever stops nt n tube piece,

G) Weights and Center of Gravity Positions:

After repairs, after installing of ndditionn.l equipment, after new painting etc, there should be watched that the empty weight center of gravity is within the limits, If necessary balance weights are to be in­stalled.

Empty weight 616 638 660 682 705 lbs

center of mn.x, 21,45 21,06 20,68 20,3 20,0 grn:vi ty position min, 19,3 18,7 18,2 17,7 17,2

behind dntum point,

Leveling means: Tangente to rib 3 horizontal,

Datum: wing leading 11dgc rib a.

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AS - K 13 Fli~ht Manunl

If the empty weight center of gravity is within the given limits it is verified that the in­flight center of gravity is correct provided the glider is properly loaded after the bnlnnce pl1ite.

The center of gr.nvi ty has an importnn1. effect to the gliders handling characteristics. There­fore one should pay attention to not cxeed the given limits,

Too much backward position may become dangcro11R: Stalling and especially the spinning characteri­stics (flat spin) can be badly influenced. The elevator become a more eenei ti ve.

Too much forward position may detoriornte the per­formance and does not allow flying at maximum lift, (flare out when landing!).

The following rn.ng~s of flight position of, e.g. are te s t e d :

a) max. forward position: 2,76 inches behind dn. tum

b) max, nft position: 9,7 inches behind dn. tum

6) Balancing instructions:

Cockpit load (Pilot+ pnrchut.e),

single occup. front sen.I, 113

two occup. front sen I, H:l

point.

point,

220 lhR,

2!!0 (IJR,

J,ess lond has to be completed wi l.h hn.l ln.s!, on the sen.t (lead - or sand cushion),

Notice: If no parachute is carried 1i bacl\ cushion has to be used which has a compreRsed thickness of 1 inches,

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AS - K 13 Fliv:ht Mn.1111nl

1) Approved VersionR:

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AS - K 13 Flight Mnnual

1) Rigging:

21) Clean and grense bolts and holes.

) First put in left wing from the side nnd put in renr bolt. Do not tilt fuselnge,

3) Put in right wing as mentioned under 2, 4) Put in the tnpered pins (first. the lower onr)

nnd screw on U1e nu{ .• Dy slight shal< ing the wing this cnn he done en.sier.

5) Secure the tapered pin with n safet . .'· llPl'illr,

Secure the rcn.r pins by the sn.fety hoohs. 6) Connect the 1dleron nnd nirhru.ke linlrn1u•s

and secure by the safety needles, 7) Put on elevator, the front screw has hi

he fastened by the wrench, There hns to he wn.tched thnt the hell 1· rnnk is properly put into the pushrod C'o1111t.P1' -pnrt. There is the danger of hending the push rod.

8) After the elrvn.t.or ha!' been put on the pushrod of the trim tnh ho.s to be co1111Pc 1 .. 11 to the tith hel 1 cro.nl< by n pin, w111'1hPI' nnd snfety pin, It is recommended to fix t.h" push rod for Lrnnsport.

2) Preflight Check After rigging rci:1p. dni1,v befor t.he firs!. flight: Check 1dl rigging connections for prnprr f'I' -

curing. Look for foreign bodies, Check U1r cont.,o 1 s, airbrakes 11.nd the re 1 en.se hoc I< l'or free movement.

It is recommended to checl< frecpwnt.l.'· th1• who le glider thorough!.'·· Th('re 1111.vP hrplJ r 011n1l 1pii t.e n. lot of unsecured hol ts n.nd dnmngt' 11 t. such occasions. lJRc n l'l1u:;h liirhL t.o look into every spot.

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AS - I{ 13 Flight Mnn11nl

3) Derigg.ing

Point 1 - 8 (Rigging) in reveri::e sequence, Grense nll ,joints, danger of rust!

11) Rond Trnnsport

The design of n. trni ler ii:: IL specinl t.n:<;I< nnd cnn not been tnlked here in nll det1d ls, The firm of Schleicher will supply suitnhle drawirngs for trnilers, The wing is best supported nt t.11e spnr root., The second support. should hnve enough dist.nnce, best about 8 feet from wing tip. A sufficient wide aern nt the supports is importnnt,

The s1tme considernl.i ons concerns to the fnsl'l n­ge, Fix points 11.re the wheel, the fixinl.( hole 1Lt the ren.r fus1?l11.ge nnd the two welded in screw nuts on the side of the forwnrd pnrt of the fuselnge.

Careful nt.terd.inn i::hould he pnicl to prevent w n t er co nd n g i ll f.o t he i 11 I, r r i or of the w i 111!

and fuse ln.ge. 'fhc> nil 1!rnn nncl nirhrnke pui::lr rods in thr f11s1dngr i;ihould he fnst.ened, hei::I, w i th n ru h be r s t. n1 p ,

o) Mnint.ennnce

Hunlit.y is the wonit enemy of IL wooden glider. Be c1iref11l to prevent, wnt.er renm.ining in cor­ners. On i::uspicinn thnt wn.l.er cnme into wirq.rs and f11selnge, hring snme int.n n llry roo111 nncl turn ever.v dn._y, The l!l ider iR e11dnngerecl especinlly on open t.rnill'rR, In 1rny eni;;c ii. mu st he tn.k en en.re for tlm {, h;v rn Vt•r i ng t.h l' front pnrf, no splnsh wn.t.cr will t.ouclr i.he wi.ng root,

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AS - K 13 Flight Manual

Also by condensing water considerable quantities of humidity can enter the interior of the glider.

Strong sun irradiation will affect the finish by time, therefore the glider should not be ex­posed to the sun more Lhan neceasary. The treat­ment of the finish with good waxes and polishing material will increase the durability and improve the surface, an important fact for performance. The advantages of the laminarprofil can only be achieved by a smooth surface,

Sealing of gaps with adhesive tape will also cause some gai-n of performnnc e. However at the co ck pit caution is necessary, when parachute bail out shall be possible.

Cleaning of the plexiglas canopy only with suitable cleaners. If not available use pure water. Soft cloth (gloves cloth), In no cnse rub with hnrrl cloth dry on plexiglnss,

Lubrication of bearings:

So far as possible, the ball bearings are covered and therefore need no special maintenance. Only the bearings at the wing root, where the rigging connections do not allow a s11itnhle protection, must be clenned with gnsoline when dirt.,v and greased ngq.in.

The control surface bearings are to be dismant­led and gre•.sed at the annual overhn.uls.

Wheel: Tube pressure 35 psi.

The e.g. hock especiully is exposed to dirt nnd needs often cleaning nnd citing,

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AS - J{ 13 Flight Mnnunl

The tni l sldd shoe h1ts to be so led from Lime to time b,Y welding 011 IL new steel pl1tte. nut it should be removed for th.is worlt to prevent hurning the ruhher !>lock.

The pressure openings for the instrument.s nt the fuse lnge are to be seed eel with ndhesi ve tnpe on trnusport or extended pu.rldnii;. During longer non­f l,Ying periods it is 1idvisnhle to put the in -strum1mt.s complel;el;r out nnd store it. in n dr,Y room, When installing agnin wntch correct connec­tj ng of the Lu hes.

Tho safety belts nrc t.o be checked currr.nl. ly for fr1tctures, dn.mp-stni n 1Uld corrosion.

6) Overhauls

The tow hock hns to be removed ever,Y 2000 11tunches or 2 yerirs nnd sent b1tclt t.o the mnnn­fncturr.r for overhaul. The rudder cables are to he replncerl if there nre any signs of worth mentioning wenr.

7) Repairs

All 11111.jnr repni rs should he made in the mnnu­fncturi ng firm. In cnses of doubt please nsk the Schleicher firm.

8) Appendix

3 - View drawing Bnln.ncing sheet.

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ASK 13 Flight Manual - 22 -

Semiaerobatice: Besides spins the following aerobatic manetivres may be executed:

Loops

Stall turns Lazy' eights

Loop: Spe~d

Stall turn:

of entry 90 to 100 .m.ph.(78-B/ k\-s)l e 7 -4-o ..!:}5 k-1-:s l

Speed of entry 100 to 110 mph. ~ puring climb at approx. 60 mph~~~ there has to be applied full rudder and slightly opposite I aileron. I

I Lazy eight: Speed at the oroesing point

90 to 100 mph. ~ 87 ~ ~5 k+.s)

I I