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Setup Heli PDF

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LU HNH NI B

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Li noi au Hin nay vi vic ngy cng c nhiu bn tham gia vo mn chi m hnh ny gp rt nhiu kh khn trong vic set up my bay cho chnh mnh.Nh s tin tng ca mi Tnh c th vit ti liu ny.Khuyn co mi ngi y l b mn chi i hi s kin tr ,nhn ni .c t t xuyn sut tt c chnh v quan trng nht l phi hiu,nu mi ngi b qua vi chi tit c th kh khn trong vic hiu cc phn sau.

Hy vng vi kinh nghim t i cng thm hc hi cc n anh i trc ,trn cc website heli ca th gii,ng thi c nhng phn m Tnh t hiu nn chc chn rng s gp t nhiu sai st trong ti liu ny .V ln cui nhn mnh l ti liu ny hon ton mang tnh cch c nhn ,cn rt nhiu sai st ,mong mi ngi ng gp hon thin hn. Xin chn thnh cm n !

Lien he email : [email protected] Than ai ! Ch Tnh

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Phu LucTrang Phn 1 : T chuyn mn ...................................................................................... 3 4 Phn 2 : Cc khi nim .......................................................................................... 5 -11 Phn 3 : DX7 I.Cng tc System menu ....................................................................... 13 -15 II.Menu chc nng ................................................................................... 18 23 Phn 4 : Set up heli ............................................................................................... 24 - 37 Phn 5 : Cc bnh thng gp ca heli .................................................................. 38 - 40

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Phan I : T chuyen monTrong qua trnh set up do co mot so t khong the dch sang tieng viet nen ta s dung t nguyen ban ,do o,viec lam quen vi t chuyen mon la rat can thiet.

Hnh anh cu the

Ten goi va cong dung +Servo +Tao lc keo

+Arm servo

+Motor +Tao lc quay cho canh

+ESC (Electric Speed Control) +ieu toc motor

+Gyro +Gi uoi,chong quay uoi

+Linkage rod +Lien ket cac chi tiet / truyen lc +Ball

+Swashplate

4 +UBEC / BEC +La thiet b on nh ien cap cho cac thiet b ien khac.Thong thng trong ESC co tch hp san nhng a so layeu.

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Phn 2 : Cc khi nim1.Pitch cnh :Pitch l gc tn ca cnh ,khi my bay quay th gc tn ny cng ln,sc to gi cng nhiu v ngc li. Ch : Nhn t trn xung th cnh chnh quay theo chiu kim ng h ! Pitch cnh c 2 loi : pitch m v pitch dng. Pitch dng to lc nng

Pitch m to lc heli xung

Cch o pitch cnh: o pitch cnh th ta s dng thc o pitch (pitch gauge)

Cch o Thng thng khi o th ta nn phng ca cnh chnh dc theo thn heli,xoay u heli v hng ngi o. Tng/gim gi tr trn thc o sao cho phng ca thanh flybar trng vi phng ca thanh thc. Gi tr trn thc tng ng s l tr s ca pitch cnh Ch : Khi o pitch cnh,ta cn thao tc ko 2 cnh thng ra trc khi o.

6 V d :

-C th trong hnh l pitch = -2

2.Aileron v ElevatorAileron (Ail) v Elevator (Ele) dng ch phng nghing ca my bay. Khi t ui heli v hng ngi iu khin th : Ail dng ch th ng tc heli : Tri / phi Tng t th Ele : Ti / li

Mi lin h Ail Ele v Swashplatet ui heli hng v hng pilot,swashplate nghing hng no th heli nghing theo hng .

3.Pitch curvePitch cure l mt chc nng (funtion) ca tx cho php ta iu chnh pitch tng ng vi v tr cn ga.Thng thng th pitch cure c 5 im (5-point) tng ng vi 5 v tr t thp ti cao ca cn ga (nhng trn cn ga,ta ch quan tm 3 im 1 , 3 v 5 tng ng vi v tr thp nht ,chnh gia v cao nht ) Trn Dx7 th v tr 1 ghi l L (Low) v v tr 5 ghi l H (High)

Cng l 1 con heli sau khi set up phn c khi thi ta s dng pitch cure iu chnh pitch cnh sao cho ph hp vi mc ch bay. VD:Bng di y ch l tham kho ,khng mang tnh cht p t (nht l vng/pht Round Per Minute : Vit tt l RPM) Ngi mi tp chi (newbie) tua cnh cn nh nhng ~ 2000 vng/pht(RPM) Bay sport tua cn cao hn ~ 2500 RPM 1 3 5 1 3 5 - 2 +4 + 10 - 4 0 + 10

V tr cn ga trn tx

Pitch cnh

V tr cn ga trn tx

Pitch cnh

7 3D Tua + 3000 RPM V tr cn ga trn tx 1 3 5 Pitch cnh - 11 0 + 11

4.Throttle curve.Tng t nh Pitch curve th Throttle curve cng c chia lm 5 im tng ng vi cn ga trn tx t thp nht ti cao nht (1 : thp nht ,3 : chnh gia ,5 : cao nht)

Cng ty theo mc ch bay m ta cn phi kt hp vi set up pitch curve t vng tua cn thit khi bay.y cng l 1 iu kh phc tp dnh cho ngi mi.

5.Mi lin h Throttle curve v pitch curve. nng cao hiu sut motor ,pin v cht lng bay th vic phi hp pitch v ga l rt quan trng.Nhng hiu c vn th khng h n gin,nn phn ny mang tnh cht l tham kho,a/e c th b qua ri n phn sau ,hng dn set up,c th lm 1 cch my mc nhng vn m bo cht lng bay. Nhng khuyn co l nn hiu phn ny a/e c th t tay set up vng tua theo mnh. Pitch cnh ng (khi tng ga hay gim ga th pitch cnh cng tang/gim theo nhng tng gim nhiu t ty thuc vo vic chnh thng s trn tx) quyt nh cht lng bay. minh ha cho vic ny th ta c v d: VD : ang hover tm 1 mt th bng nhin c 1 cn gi thi my bay ta ln cao 2 3m chng hn.Lc ny,ta li mun heli gim cao,do ta gim ga xung (ko cn ga xung ) heli vn cn tua(quay theo qun tnh) v pitch cnh li dng khi quay to nn 1 tit din chn gi,to iu kin cho gi thi heli ln , heli khng th ngay lp tc h cao nu khng vng li th vic p kh m trnh khi. Do ,my bay cn phi set pitch m trong trng hp trn,khi gim ga,pitch cnh gim t dng n 0 (pitch cnh = 0 th cho d heli quay vi vng tua bao nhiu cng khng th to ra gi nng/ heli xung) ri gim t na l thnh pitch cnh m,lc ny cnh quay vi pitch m s to ra lc heli xung do ,vi vic set heli c pitch m s gip ta linh hot hn vic iu tit cao cho heli. Trn ch l v d n gin v tc dng ca pitch cnh ng.Sau y mi chnh l phn quan trng nht ca vn .

Pitch cnh v % ga c mi lin h nh th no v quyt nh vng tua ra sao ?V d : Khi heli va nng khi mt t th c 2 ngi set tua cnh nh sau: Ngi 1 : Ga = 50% ,pitch = + 4 ,tua khong 1800 RPM Ngi 2 : Ga = 65%, pitch = + 2,tua khong 2100 RPM Ngi 1 bay tua thp,ngi 2 chn bay tua cao hn. Nh vy to ra cng 1 lc nng th tua t l nghch vi pitch cnh (Tua tng th pitch gim v ngc li,tua gim th pitch phi tng mi c th to ra cng 1 lc nng). T t ra vn l tng / gim tua cnh (khi bay).a s a/e thng hay nhm ln ch ny ,ngh l tng tua th ch cn vo th ga v tng % ga 3 v 5.

8 Nhng i khi li khng th tng tua bng cch tng % ga ,ta ch c th gim pitch xung t c tua cnh cao hn . gii thch vn ny,ta quan st v d : Vd: Mt ngi khi bay y cn ga t t ln cao,khi cn ga gn ti gia th heli chun b ct cnh , pitch = + 5 (vi th pitch l 0 25 50 75 100 tng ng vi 5 im), 40% ga ( th ga l 0 25 50 75 100 tng ng vi 5 im).Sau khi thy tua hi thp hover,ngi ny bt u vo th ga v tng ga ln nh sau ( 0 30 60 80 100),v sau khi bay li th cm gic v tua khng tng. Gii thch : Pitch = + 5, 40 % ga th heli ct cnh ,v tr cn ga l 2/5 = 0,4 hnh trnh.Tua khong 1500 RPM. Tng ga trong th ga th : pitch = +4, 45% ga th heli ct cnh,v tr cn ga l 3/8 = 0.375 (v tr cn ga thp hn lc cha tng ga) ,tua khong 1550 RPM. Do 50 RPM l kh nh nn cm gic v tua tng l hu nh khng c.V nht l vic tng ga nh vy i khi l pitch v ga khng ng u dn n hin tng heli b m g. Do tng tua th ta nn vo th pitch v gim pitch xungchng hn gim thnh ( 0 20 40 60 80 ) th lc ny tua c tng ln cao hn rt nhiu so vi vic tng ga trong throttle curve.

6.Gyro v headlock Hay cn gi l AVCS Angular Velocity Control System.Gyro l thit b cm bin s xoay ui,khi ui heli b xoay th gyro a tn hiu cho servo ui (Rudder servo) chiu chnh pitch cnh ui to ra gi ph hp ui cn bng tr li. Theo c nhn th gyro hin nay gm 3 loi cm bin : Cm bin thy ngn : Gyro KDS 800 , 401B v 1 s loi gyro t tn tui khc thng dng cm bin thy ngn Gi t 20$ n 40$

Cm bin SMM (Silicon Micro Machine) : Gyro : Futaba 401 ,Align GP750 ,Spartan 760 , KDS 900 Gi t 100$ n +150$

Cm bin MEMS (Micro Electric Machine System) : Gyro : Futaba 520 ,Spartan Quark , JR G370 Gi trn 130$

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Cng ngh MEMS mi nht hin nay.

Thut ng headlock hay AVCSa s gyro hin nay trn th trng u l gyro c headlock. S khc bit gyro c headlock v gyro khng headlock

u c nhim v gi ui khi ui b tri,nhng chng c s khc bit nh sau: Khi c gi thi vung gc vi phng i thng ca heli (nh trn hnh) ,ui b tri 1 khong th gyro cm nhn s tri,lp tc truyn lnh cho rudder servo lm i ng yn li.Sau khi ui gi li,gi tip tc tc ng,ui li tri 1 khong nari qu trnh tip tc cho n khi no hng gi trng vi phng ca heli (tnh t u n ui). Gyro c headlock th ban u cng lm vic nh gyro khng headlock nhng sau khi b tri v dng li,gyro ngay lp tc tnh ton gc tri v a tn hiu cho servo ui iu chnh ui tr li v tr ban u.Do ,gyro c headlock m bo ui khng b tri khi gp gi hay tc ng t bn ngoi.

7.Gain Gyro nhy ca gyroDo trong qu trnh bay,ta c th chn nhiu servo ui (rudder servo) khc nhau nn tc gi ui ca cc servo cng khc nhau.V l do ,cn phi c chc nng Gain Gyro iu chnh nhy ca gyro truyn cho rudder servo phi ph hp,khng qu nhanh (-> ui b vy),khng qu chm (ui b tri hay gi ,nhng qu qung).

8.Thng s Kv ca motor v tnh ton tua :Mt trong nhng thng s quan trng nht ca motor l Kv. Ch s Kv l s vng tua ca motor tng thm khi tng in p 1V. Vd : Motor KDS mu tm c Kv = 3500 ,khi ,ta tng 1V in p cp th motor quay nhanh thm 3500 vng/pht.

Cch tnh vng tua.y ch l cch lm ch dng mc tng i nhm gip a/e c th hiu su hn v thng s Kv ca motor v 1 phn gip set up tua tng i ph hp khi bay. RPM = ((Kv * V * P ) / M ) * H * (% ga)

10 Trong : RPM (Round Per Minute) : Tua cnh chnh tnh trong 1 pht Kv : Thng s Kv ca motor V : Hiu in th ca pin P : s rng ca pinion (pinion l nhng kim loi,gn trn ct motor) pinion c t 11 n 15 rng (11T -> 15T),a s s dng pinion 13T M : s rng ca nhng chnh (main gear) ,thng th 150T H : l hiu sut ca motor,thng thng t 0.8 n 0.9 Vd : Motor KDS c Kv = 3650 Hiu in th ca pin lipo 3s (3 sell) = 12 Volt (ly 12 l khong trung bnh v s p,ch tht ra pin lipo khi ht pin th c in p = 11.1Volt ,khi xc y th 12.6Volt) Pinion 13T Main gear = 150T Ti mc ga l 80% Motor c hiu sut 85% Vy vng tua cnh chnh ti 80% ga l : RPM = (3650 * 12 * 13) / 150 * 85% * 80% = 2581 Vng/pht

9.Lc cn do pitch cnh gy raTrc tin a/e hiu v lc cn do pitch cnh gy ra th ta quan st vd sau y : Vd: Mt heli ang quay vi tua 2700 RPM (70% ga) ,pitch cnh lc ny = 0 (khng to ra gi) cn ga ang nm v tr

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