LZ design FES-LAK-P11-100 User manual

UAB “SPORTINĖ AVIACIJA ir KO”
Chief designer
_____________ / K. Ju čas /
2019-11-26
FES PROPELLER MANUAL
Version 2.0
Type: FES-LAK-P11-100
Serial Number: ______________
LZ design d.o.o., ● Brod 3 , 1370 Logatec, Slovenia ● tel [phone]
[email protected] ● www.front-electric-sustainer.com
Joint Stock Company ”SPORTINĖ AVIACIJA ir Ko”
Pociūnų km., Ašmintos sen., LT-59327, Prienai, Republic of Lithuania
tel:[phone] ● fax:[phone] ● e-mail: [email protected] ● www.lak.lt

FES Propeller Manual v2.0 FES-LAK-P11-100 November 2019
Table of Contents
1. Imp rtant n tices.......................................................................................................................................3
1.1. Limited Warranty...............................................................................................................................3
2. General.......................................................................................................................................................5
3. M del designati n......................................................................................................................................5
4. C nstructi n...............................................................................................................................................6
4.1. Certificati n standards........................................................................................................................6
4.2. C nstructi n Material.........................................................................................................................6
4.3. Surface finish......................................................................................................................................6
5. Installati n..................................................................................................................................................6
6. Inspecti n...................................................................................................................................................7
7. P ssible damages and all wables..............................................................................................................8
8. Maintenance and repair..............................................................................................................................9
9. Shipping and st rage..................................................................................................................................9
10. Revisi n hist ry.......................................................................................................................................9
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FES Propeller Manual v2.0 FES-LAK-P11-100 November 2019
1. Impo tant notices
Please read this manual th r ughly. It c ntains imp rtant inf rmati n ab ut y ur system, having a vital
imp rtance t the flight safety.
Inf rmati n in this d cument is subject t change with ut n tice. The manufacturer reserves the right t
change r impr ve their pr ducts and t make changes in the c ntent f this material in Manual of
alternative procedures to DOA determinate rder.
1.1. Limited Wa anty
This pr duct is warranted t be free fr m defects in materials r w rkmanship f r tw years fr m the date
f purchase. Within this peri d, the manufacturer will, at its s le pti n, repair r replace any c mp nents
that fail in n rmal use. Such repairs r replacement will be made at n charge t the cust mer f r parts
and lab ur, the cust mer shall be resp nsible f r any transp rtati n c st. This warranty d es n t c ver
failures due t abuse, misuse, accident, r unauth rised alterati ns r repairs.
THE WARRANTIES AND REMEDIES CONTAINED HEREIN ARE EXCLUSIVE AND IN LIEU OF
ALL OTHER WARRANTIES EXPRESSED OR IMPLIED OR STATUTORY, INCLUDING ANY
LIABILITY ARISING UNDER ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE, STATUTORY OR OTHERWISE. THIS WARRANTY GIVES YOU
SPECIFIC LEGAL RIGHTS, WHICH MAY VARY FROM STATE TO STATE. IN NO EVENT SHALL
THE MANUFACTURER BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT OR
CONSEQUENTIAL DAMAGES, WHETHER RESULTING FROM THE USE, MISUSE, OR
INABILITY TO USE THIS PRODUCT OR FROM DEFECTS IN THE PRODUCT.
S me states d n t all w the exclusi n f incidental r c nsequential damages, s the ab ve limitati ns
may n t apply t y u. The manufacturer retains the exclusive right t repair r replace the unit r t ffer
a full refund f the purchase price, at its s le discreti n. SUCH REMEDY SHALL BE YOUR SOLE
AND EXCLUSIVE REMEDY FOR ANY BREACH OF WARRANTY.
T btain warranty service, c ntact y ur l cal dealer r c ntact with the manufacturer directly.
N vember 2019 © 2019
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FES Propeller Manual v2.0 FES-LAK-P11-100 November 2019
Wa ning:
Pe ple wh fly sh uld rec gnize that vari us types f risks are inv lved, and they sh uld take all
precauti ns t minimize them, since they cann t be eliminated entirely. The pr peller is a vital c mp nent
f the aircraft. A mechanical failure c uld cause a f rced landing r create vibrati ns sufficiently severe t
damage the aircraft. Pr pellers are subject t c nstant vibrati n stresses fr m the m t r and air stream,
which are added t high bending and centrifugal stresses.
Bef re a pr peller was certified as being safe t perate n an airplane, an adequate margin f safety was
dem nstrated.
It is essential that the pr peller is pr perly maintained acc rding t the rec mmended service pr cedures
and a cl se watch must be exercised t detect impending pr blems bef re they bec me seri us. Unusual
vibrati n sh uld be investigated and fixed, as it c uld be a warning that s mething is g ing wr ng.
We urge y u t read this Manual th r ughly. It c ntains imp rtant inf rmati n ab ut y ur pr peller. The
pr peller is ne f the m st critical parts having vital imp rtance t the flight safety. It theref re deserves
the care and maintenance called f r in this Manual. Please give it y ur attenti n, especially the secti n
dealing with inspecti ns and checks.
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FES Propeller Manual v2.0 FES-LAK-P11-100 November 2019
2. Gene al
The f ldable fixed pitch c mp site pr peller FES-LAK-P11-100 is high quality pr duct.
Technical data and limitations of the p opelle :
Number f pr peller blades: 2
Maximum p wer n a pr peller shaft: 30 kW (40.23 HP);
Maximum r tati nal speed: 5300 RPM;
Pr peller blade mass excluding attaching b lts: appr ximately 260 g each blade;
Diameter f the pr peller: d = 1000 mm;
Service time between main verhauls: 100 h urs;
T tal service time: 200 h urs;
Type f pr peller: tract r;
Sense f r tati n: cl ckwise l king at directi n f flight;
Operating c nditi ns: the pr peller can be perated in any n rmal
envir nment c nditi ns except hail, sand st rm r
similar.
3. Model designation
Pr peller m del designati n is the f ll wing:
FES - LAK - P11 - 100
(1) (2) (3) (4)
where:
(1) – designed f r applicati n;
(2) – suitable f r sailplane type;
(3) – m del versi n;
(4) – pr peller diameter in cm.
Pr peller serial-number is identified as f ll ws:
XXX YYYY
where:
XXX – serial number f the pr peller; ne
blade is marked A, sec nd as B;
YYYY – year f manufacture.
Pr peller identificati n placard is l cated n the pr peller sticker (glued n inner center part f the
pr peller).
Wa ning D n t use y ur pr peller as a handle t m ve the airplane! The pr peller is ne f the
m st imp rtant parts f y ur airplane!
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FES Propeller Manual v2.0 FES-LAK-P11-100 November 2019
4. Const uction
4.1. Ce tification standa ds
Pr peller FES-LAK-P11-100 described herein is designed and tested acc rding t CS 22 Subpart J.
4.2. Const uction Mate ial
Pr peller is made f GFC and CFC. It is made in accurate metal m lds, which were manufactured using
m dern CNC techn l gy. This made p ssible t have very accurate pr peller ge metry.
4.3. Su face finish
Quality acrylic white paint is used t pr tect the c mp site b dy against m isture and er si n. Each blade
pair is sanded and p lished s that mass difference is nly 0.1 g. Paint is resistant against fuel, il and
ther chemical pr ducts. This type f paint has als an excellent flexibility. Tips can be painted red as a
safety mark.
5. Installation
1. Check pr peller type and c nditi n. Clean pr peller and let it dry.
2. Oil n any f the surfaces must be av ided. Check b lts f r cracks, thread and c rr si n. Replace if
needed (imp rtant that the b lts w uld be f the same length, s as n t t damage the m t r
bearings).
3. Assemble pr peller blades with the pr peller h lder. Make sure that blade marked with a small d t
is inserted int pr peller h lder side which is als marked with small d t.
4. Insert special blade h lding b lts, fr m back side f pr peller. This means that head of the bolt
must be on trailing edge side of propeller as on picture below! One f the b lts is marked n the
head with a small d t. Be sure t install it int marked side f the h lder. Bef re inserting b lts,
grease them just slightly n the stable. T much grease will be rem ved by centrifugal f rce, s
use really a minimum am unt f grease.
5. On the threaded side f a b lt put M8 In x washer, and thread in cr wn nut M8. Tighten the cr wn
nut with 13 key s that there is s me tensi n in h lder f rks, s that b lt can n t r tate. H wever
blades must still be able t pen and cl se freely. Then insert int a b lt h le and tr ugh cr wn nut a
safety pin (with 1.4 mm diameter), cut it t pr per length and bend it ar und cr wn nut.
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FES Propeller Manual v2.0 FES-LAK-P11-100 November 2019
Figure 1. Pr peller blades m unting n the h lder
6. Tighten the spinner p.4 with special M4 In x b lts p.3.
7. Rem val – refer t 4.1 thr ugh 4.6 but in reverse rder. In any case, if hard t ls are used, the
pr peller will be damaged.
6. Inspection
1. Every time y u g t fly, th r ughly perf rm preflight inspecti n:
•take a l k at the entire pr peller inspecting f r damages, leading and trailing edges f r p ssible
splitting r de-laminati n.
•c mp site pr peller blades are always as g d as they l k. If the t tal blade surface sh w n
cracks, n rec nditi ning r verhaul will be necessary. Pay special attenti n t the r t part f the
blade, leading and trailing edges.
•inspect central part f the pr peller f r p ssible cracks r def rmati ns. N cracks r def rmati ns
are all wed. If such are f und, c ntact the manufacturer.
2. At the 25 h urs inspecti n (peri dically t be d ne up t the annual inspecti n):
•clean the pr peller with any car wash s luti n r equivalent.
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FES Propeller Manual v2.0 FES-LAK-P11-100 November 2019
•make the n rmal preflight inspecti n, but especially pay attenti n t the center part f the pr peller,
leading and trailing edges f the blades f r cracks and de-laminati ns and the lacquer surface f r
c nditi n.
•inspect blades f r st ne damages, and mark them.
3. Annual inspecti n r inspecti n after up t 15 % ver-speed f the rated maximum r tati nal speed
RPM:
•inspect pr peller as per instructi ns given under §6 (2). If any crack is f und, the pr peller must be
rem ved fr m service immediately. Send pr peller t the manufacture f r inspecti n.
4. Over-speed: Up t 15 % ab ve the rated maximum r tati nal speed RPM inspecti n per §6 (2) and
§6 (3) is required. At m re than 15 % ver-speed the pr peller sh uld be sent t the fact ry f r
inspecti n.
5. Service time between main verhauls is 50 flight h urs. Main verhaul can be perf rmed by
pr peller manufacturer nly.
7. Possible damages and allowables
1. N structural cracks r de-laminati ns f c mp site structure are all wed f r the pr peller.
2. Small cracks up t 10 mm f length in a lacquer are all wed. Make sure cracks are in a lacquer
layer nly and n t g ing int the c mp site structure. Fine cracks in the lacquer surface acr ss the
blade axis are indicati ns f bending vibrati ns. Such cracks m stly ccur in the uter part f the
blade. N sudden blade failure can ccur due t these cracks. If such cracks d ccur, the fact ry
sh uld be c nsulted regarding airw rthiness, if p ssible t gether with a ph t and inf rmati n
ab ut perating time.
3. The er si n ccurs due t the peripheral speed f the blade and is n rmal. H wever, always take
care that the er si n never bec mes s deep that FRP-c at is damaged and there is a p ssibility that
m isture may enter int the blade b dy. In this case the blade must be repaired/ verhauled
immediately.
4. St ne damages. If st ne damages are visible, mark them and check them peri dically. Maximum
size f st ne damages permitted f r perati n is 2x4 mm large and 0.7 mm deep. Maximum number
f damages all wed is ne damage per 4 cm – 2. If bigger r m re damages exist n a blade, send
pr peller t manufacture f r inspecti n and verhaul.
5. Cracks r def rmati ns in a center part f the pr peller are n t all wed. If such ccurs, send
pr peller back t manufacture f r the verhaul.
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FES Propeller Manual v2.0 FES-LAK-P11-100 November 2019
8. Maintenance and epai
Note
Seri us cracks which riginate fr m the inside f the blade, are extending thr ugh the
lacquer and s are visible fr m utside. These cracks are radial cracks r tangential
cracks. Fine cracks in the lacquer as described ab ve, are c nsidered f seri us
character, alth ugh they usually start at first in the lacquer and n t in the c mp site
structure.
1. Clean pr peller if necessary with water.
2. N rmal small st ne nicks are unimp rtant as l ng as there is n t bvi us structural damage.
Scratches and nicks sh uld be filled and pr tected during r utine maintenance with a c ating f
water resistant lacquer. All wables f r damages are given in a Paragraph 7 f this d cument.
3. Br ken tips and damaged blades are n t repairable and have t be replaced. Small damages n the
trailing edge can be repaired by manufacture.
9. Shipping and sto age
1. N pr peller sh uld be st red by standing n the tips. If st rage is required, it is rec mmended t
use the riginal packing. If riginal packaging is n t available, st re it in a h riz ntal p siti n n a
s ft padding supp rting at ab ut middle f blade r center secti n f the pr peller.
In c ld weather the pr peller sh uld n t be st red cl se t heat s urce r in r ms with extreme
changes in temperature.
2. Careful packing is the best pr tecti n against damage during shipment. Theref re the pr peller is
shipped fr m the fact ry in a special cardb ard c ntainer. This c ntainer may be used f r
reshipment f r verhaul. The blade tips and trailing edge sh uld be sufficiently pr tected.
10. Revision histo y
N vember 2019 Initial release f the manual
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