3 Inch 4S FPV Drone in RTF Configuration

Introduction

The pre­sent­ed mod­el will be more inter­est­ing than ever for every­one who is look­ing for their first FPV drone and at the same time wants to get every­thing at once at an afford­able price. Eachine Tyro79S RTF is a ready-to-fly kit that includes a 3‑inch 4S FPV drone with expo­nen­tial­ly pow­er­ful and tuned hard­ware, an FrSky (D16/D8) remote con­trol and a set of bat­ter­ies for both the drone and equip­ment. The devel­op­ers of Eachine cer­tain­ly did their best, since the release of RTF, the kit has imme­di­ate­ly gained recog­ni­tion in the hob­by and is in good demand among the novice audi­ence. As usu­al, let’s start with the key fea­tures of the drone.

Note! The Eachine Tyro79S RTF has been imple­ment­ed in addi­tion to the exist­ing Eachine Tyro79. In fact, these are absolute­ly iden­ti­cal quadrics, with the excep­tion that the pre­de­ces­sor reach­es the con­sumer exclu­sive­ly in a DIY con­fig­u­ra­tion (in a com­plete­ly dis­as­sem­bled “Con­struc­tor”, with­out a remote con­trol and bat­ter­ies), which requires the user to have at least sol­der­ing iron skills, as well as expe­ri­ence in set­ting up a flight con­troller. In gen­er­al, the assem­bly process is not com­pli­cat­ed, since there are good exam­ples.

Peculiarities

• Drone weight with bat­tery: 230g
• Diag­o­nal frame size: 140mm
• Flight con­troller: Eachine F4 OSD (based on STM32F411 chip)
• ESC: 4 in 1 20A Blheli_S 2–4S
• Motors: B/C 1607 2800KV 2–4S
• Pro­pellers: 3‑bladed Rac­er­star Tor­na­do 3040
• FPV cam­era: Eachine 700TVL CMOS
• VTX: 40ch VTX XF5805 5.8GHz switch­able pow­er 25/100/200mW
• Receiv­er: Frsky XM+
• Pow­er includ­ed: 3S 11.1V 650mAh 45C Lipo with XT30 con­nec­tor
• Declared max. flight time on stock bat­tery: 4 min­utes

Equipment

The devel­op­er offers Tyro79S in two trim lev­els, which dif­fer from each oth­er in the num­ber of bat­ter­ies:

1. 2 Bat­tery Ver­sion (drone, RC, 2 × Eachine 3S 11.1V 650mAh 45C Lipo, 1 × 2S 350mAh Lipo for RC, B3 Pro Charg­er)
2. 4 Bat­tery Ver­sion (drone, remote con­trol, 4 × Eachine 3S 11.1V 650mAh 45C Lipo, 1 × 2S 350mAh Lipo for remote con­troller, B3 Pro Charg­er)

Specification

Frame

Name:

140mm Wheel­base Rac­ing Frame

Mate­r­i­al:

Car­bon fiber + Alu­minum CNC 6065

Diag­o­nal size:

140 mm

beam thick­ness:

3 mm

Top plate thick­ness:

1 mm

Side plate thick­ness:

1 mm

PC

Name:

F4 OSD Flight Con­troller

CPU:

STM32F411

Gyro sen­sor:

ICM20602 6‑axis

OSD:

built-in OSD

PPM/DSM/IBUS/UAR share:

UART1-RX

Dimen­sions:

21×21mm

Dis­tance between mount­ing holes:

20×20mm

Sup­port­ed firmware:

Betaflight/Cleanflight/Inav

The weight:

24 gr

ESC

Name:

Eachine 20A BLheli_S 4 In 1 Brush­less ESC

Input volt­age:

2–4S Lipo

Peak cur­rent:

25A (8 sec.)

BEC out­put:

No

CPU:

48MHz EFM8BB2 — with 25V 150uF capac­i­tor (sol­dered on the ESC board)

Sup­port­ed Firmware:

Dshot600/BLHeli_S/Oneshot125

MOS:

3×3

MOS type:

TPN2R703N

Dimen­sions:

27×31mm

Mount­ing holes:

20×20

The weight:

3.7 gr

Motors

Name:

Eachine 1607 2800KV 2–4S Brush­less Motor

KV:

2800KV

Out­put shaft length:

14 mm

Bear­ing:

NSK

Mag­net:

N52NdFeB

Max. thrust:

630g (with 4S bat­ter­ies + 4‑blade props)

Max. pow­er:

350 W

Con­fig­u­ra­tion:

9N/12P

Dis­tance between mount­ing holes:

12×12mm

Mount­ing holes:

ØM2

Sup­port­ed LiPo Pow­er:

2–4S

Weight (includ­ing wires):

17.8 gr

Propellers

Brand:

rac­er­star

Mod­el:

Tor­na­do 3040

Name:

3040 3×4 3 Inch 3‑Blade Pro­peller

Mate­r­i­al:

Poly­car­bon­ate

Mount­ing Hole:

5 mm

Thick­ness of the cen­tral part:

5.5mm

Weight of one prop:

1.7 gr

VTX

Name:

XF5805 5.8G 40CH 25/100/200mW VTX

Out­put pow­er:

25mW/100mW/200mW switch­able

Num­ber of chan­nels:

40

Video for­mat:

NTSC/PAL

Input volt­age:

7V~26V

Mount­ing holes:

16×16, M2

Dimen­sions:

25×20×4mm

Anten­na:

IPEX

Weight (with­out anten­na):

≤ 3.2 g

fpv camera

Name:

Eachine 700TVL CMOS Cam­era

Matrix:

1/3″ CMOS

Lens:

2.1mm

Hor­i­zon­tal res­o­lu­tion:

700TVL

Tot. num­ber of pix­els:

PAL: 1020 (H) × 596 (V) (0.61MP); NTSC: 1020 (H) × 508 (V) (0.52 MP)

Eff. num­ber of pix­els:

PAL: 976 (H) × 582 (V) (0.57MP); NTSC: 976 (H) × 494 (V) (0.48 MP)

TV sys­tem:

PAL

Email gate:

1/50 (1/60) — 1/100000s

Video out­put:

1.0Vp‑p/75Ω

Auto­mat­ic gain con­trol:

0.25/0.50/0.75/1.00 to 55 dB

White bal­ance:

Off

Expo­sure mode:

Auto

Gam­ma cor­rec­tion:

0.45/1.0

Syn­chro­niza­tion method:

inter-sync

Slave. cur­rent:

70 mA (low pow­er con­sump­tion)

Slave. volt­age:

DC 5–12V

Slave. tem­per­a­ture range:

-20℃ to +60℃

Slave. humid­i­ty range:

0% to 98%

Dimen­sions:

19×19mm

The weight:

9.5 gr

battery

Brand:

Eachine

Name:

3S 11.1V 650mAh 45C 3S1P Lipo Bat­tery XT30 Plug

Dimen­sions:

57×32×19mm (L×W×H)

Receiver

Num­ber of chan­nels:

up to 16 chan­nels from SBUS (1–15 chan­nels for PWM, 16 chan­nels RSSI for FC)

Oper­at­ing range volt­age:

3.7~10V

Slave. cur­rent:

30 mA at 5V

Slave. range:

full range
with RSSI out­put on the board: ana­log 0 ~ 3.3V

Upgrad­able Firmware Com­pat­i­bil­i­ty:

FrSky D16 mode

Dimen­sions:

21.5 × 12 × 3.5 mm (L × W × H)

The weight:

1.6 gr

Remote Control

Brand:

Eachine

Mod­el:

Lit­eRa­dio

Ver­sion:

Mode 2

Fre­quen­cy range:

2.4GHz (2403MHz — 2447MHz)

2.4G Sys­tem:

CC2500

Num­ber of chan­nels:

eight

Sys­tem pro­to­col:

Frsky (D16/D8)

Pow­er:

≤ 80mW

Sup­port­ed RC mod­els:

mul­ti-engine

Charg­ing capa­bil­i­ty:

USB port

Sup­port to con­nect to FPV sim­u­la­tor:

sup­port­ed

Out­puts:

PPM, sup­port for Stu­dent Radio Mode (teacher/student mode)

Light indi­ca­tion:

Green — Pow­er on / Red — Warn­ing / Blue — Devices are paired

Meals (includ­ed):

2S Lipo bat­tery 350 mAh

Weight (with bat­tery):

227.4 gr

Price

Eachine Tyro79S RTF is avail­able for pur­chase on var­i­ous online mar­ket­places. The devel­op­er has set the fol­low­ing prices depend­ing on the con­fig­u­ra­tion:

1. 2 Bat­tery Ver­sion — $165
2. 4 Bat­tery Ver­sion — $178

Conclusion

With­out exag­ger­a­tion, it is one of the best out­door RTF kits for a quick entry into the rac­ing drone niche. A per­fect­ly tuned from the fac­to­ry quadric with expo­nen­tial dynam­ics, with sup­port for 4S pow­er sup­ply, which can­not but rejoice. Eas­i­ly han­dles an option­al GoPro 7 cam­era.

The dis­ad­van­tages include the stock FPV cam­era (rec­om­mend­ed as a replace­ment: Fox­eer Preda­tor Micro V3/V4 or equiv­a­lent), stock props (rec­om­mend­ed as a replace­ment: 3‑bladed Gem­fan Win­dancer 3028) and stock pow­er (rec­om­mend­ed bat­ter­ies as a replace­ment: CNHL Min­iStar 650mAh 14.8V 4S 70C Lipo with XT30 con­nec­tor; CNHL Min­iStar 650mAh 11.1V 3S 70C Lipo with XT30 con­nec­tor).

A photo

Pho­to cour­tesy of Eachine Tyro79S.

Video

Eachine Tyro79S RTF Kit Review by Albert Kim.

Eachine Tyro79S in flight from Heli­comi­cro videos.

Review of the Eachine Tyro79 pre­de­ces­sor from the ZBe­stRe­view chan­nel.