TEST: JJRC H8D

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INTRODUCTION

After the wide success of the H8C, a great brushed miniquadcopter copying Phantom/CX-20 design and after the relative fiasco of the JJRC H9D (a fake 5.8G FPV in practice), JJRC here is introducing here the “real” FPV version of the H8C: same quadcopter chassis + a real 5.8G FPV system-HD camera combo. This model comes after the WLtoys V686G FPV model and probably uses the same video combo.

BOX CONTENT

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+ 1 x JJRC H8D (with a 2S 500mAh LiPo)
+ 1 x Transmitter (using 4xAA batteries not included)
+ 1 x 4″3 LCD monitor including a 5.8G VRX
+ 1 x USB microSC reader
+ 1 x 2Gb microSD
+ 4 x Prop guard
+ 1 x 5.8G dipole antenna
+ 1 x charger for the quadricopter LiPo
+ 1 x USB charger cable for the Monitor Lipo
+ 4 x Spare props (2 CW, 2 CCW)
+ 1 x Instruction manual (English/Chinese)

OVERVIEW

As said previously, the H8D uses the same quadcopter chassis than the H8C. you can find the full review here: http://www.rcgroups.com/forums/showthread.php?t=2276138. It means, that you can only order the FPV combo to adapt to your H8C if you already own a 5.8G ground station.

– top view

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– bottom view

With the combo attached beneath

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The lens orientation can be ajusted, it’s a good point

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In comparaison with the WLtoys V686G and the JJRC H8C

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Strictly idendical in external point of view with the H8C.

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148g without prop guards…. so close to 4g more heavier than the H8C.

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– Battery

The lipo is the same than the H8C, a 2S model using a non-JST connector

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The H8D still uses a 2S system and unfortunatly motors are strictly indentical to the H8C. They are known to have short duration life due to the extra stress on them with the 2S voltage. I strongly advice:
– to check before each flying session if all all props are spinning freely by hand
– to install some ball-bearings (MR74 format) to replace default bronze bushings
– to add time to time a drop of sillicone oïl into bearings only

Only the transmitter chassis changed versus the H8C

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Now it uses the same introduced with the H12C : a large model easy to grab for large hands and a wheel to fine-tune the speed rate. It’s a good RTF model

– LCD monitor

The LCD is a small 4″.3 monitor identical to the V686G model

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On top right, you can screw via the SMA connector any 5.8G antenna

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It’s shipped with a linear model

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The screen is extremely brillant

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more the brightness setting can’t be tuned…. so even with the sun shade, it’s very hard to see the “live” transmission outdoors. Definitively a bad point Another concern is about LCD mounting into the radio. The LCD is clipsed into a TX’s hole but can rotate freely over an x-axis. By consequence if your are holding the radio vertically, the LCD can fall on sticks control during flight… Not ideal and potentially dangerous

Camera

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Referenced V1.6 versus V1.5 for the V686G.

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The video is transmitted in NTSC format @5645Mhz (Freq 4 of Boscam band), so exactly the same frequency as for the V686G. This frequency can’t be ajusted (except by modding both VTX & VRX parts). As for the V686G, video files are automatically splitted every 3mins.

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Bad news, the lens mount is smaller than for the V686G. It means you can’t scews the “BG” M7 lens as for the V686G

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Direct comparaison with the 808#16 lens D

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Unfortunatly, when you install the 808#16 lens D, the color are absolutly not respected and the video is reversed. If you still want to install this lens, you will need to mod the camera casing to flip the camera FC

The attached linear antenna.

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FIRST USAGE

CONCLUSIONS

Well the H8D is a as good flyer as the H8C agile, sporty in 100% rate and relatively wind resistant (vs the V686G at least). The FPV transmission is excellent (~100m easily) and HD camera part offers very good quality and jellofree videos (as good as the V686G). The control range is also good (around 100m out of the box) but not as good as for the V686G IMHO. You can probably improve it by positioning antenna vertically Inside the H8D canopy. Any two main concerns have to be raised : 1) the 2S system strongly requiers some ball-bearings installation to improve motor’s durability (even if it’s not 100% sure) and 2) actually any wide lens 100% working is available. The real question is : V686G or this one ? Except if you own already a H8C, want a more sporty quad, I advice to go more on the WLtoys V686G model because of the last two points.

FPV session recorded with my GS922 set on 5645Mhz/NTSC

I am really suprized by the quality of the FPV part. I measured input voltage on connector : 5V and 3.40V respectively… so more than the 4V for the WLtoys V686G

UNBOXING

PROS

+ Very good flyer, stable for beginner and sporty in 100% mode
+ Nice design
+ Robust and durable
+ Jellofree plateform out of the box
+ Good control range (~ 100m)
+ Good TX radio
+ Orientable lens
+ Efficient video transmission (> 100m, NTSC format @5645Mhz)
+ DeviationTX compatible

CONS

– No ball-bearings
Same 2S motors with shorter life (need absolutly ball-bearings installation to decrease extra friction)
– Narrow FOV with the default lens
– Pseudo “homing/RTH” with more and more random effect when engaged late in flight
– No 100% compatible with 808#16 lens D
– Shorter range than WLtoys V686G
– Brillant screen (very hard to use outdoors even with the presence of the sun shade)
– Wide M7 lens can’t be installed and 808#16 lens not 100% compatible. Need camera casing modifications in any case

RCgroups thread: http://www.rcgroups.com/forums/showthread.php?t=2418875

This quadcopter have been courtesy provided by Banggood in order to make a fair and not biased review. I would like to thanks them for this attitude.

You can find it actually for 121 USD at
http://www.banggood.com/JJRC-H8D-FPV-Headless-ModeRC-Quadcopter-With-2MP-Camera-RTF-p-974875.html

MR74 ballbearings

http://www.banggood.com/MR74-Open-Type-Bearings-Miniature-Ball-Bearings-4x7x2mm-10Piecs-p-972944.html

7 Comments

  • garrin says:

    im having a hard time getting controller connected to quadcopter can you help please

  • carman says:

    Do you know if there is video out from reciever? Trying to set up a pair of VR goggles using my note 4 and easycap video capture dongle. If not, can you reccomend a good reciever that will link up with the stock transmitter? thanks for the review and info. I had already ordred the JRC h8d when I found this, but made sure to order the bearings to make her last.

    • SeByDocKy says:

      No AVout out of the box, but you need to collect the AVout signal & GND directly on the VRX chip. If you don’t want to mod anything, you can any 32CH 5.8G receiver, it will work with your H8D

  • Jack says:

    Hi, i had some truble with my h8d camera, it’S GONE.I’d like to use the receiver and the scrren for another FPV project. Can you reccomend a good Tx that will link up with the stock Rx and screen?

    • SeByDocKy says:

      Any 32CH/40CH VTX will work … in practice as soon as you select the right freq of the FPV monitor (I wrote it in my review)
      On which kind of rotors you want to install your new VTX ?

  • Eric says:

    How can I add the ball bearings to the motors?

    • SeByDocKy says:

      You have to remove first the prop by unscrewing the tiny screws attaching the prop the metal shaft. Then remove the metal shaft… Ball bearings are installed on both side of the shaft housing.

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