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Hobbyking X900 Tricopter Glass Fiber Multi-Rotor Frame

Hobbyking X900 Tricopter Glass Fiber Multi-Rotor Frame
Hobbyking X900 Tricopter Glass Fiber Multi-Rotor Frame

Designed from the ground-up by our own engineering team, the X900 Tricopter is a culmination of months of design, testing and material sourcing to provide you with the perfect mix of quality, performance and value. The X900 Tricopter frame is a Hobbyking exclusive meaning you won't find it anywhere else!

The X900 features a very nicely finished glass fiber main frame, shock-absorbing landing legs and folding aluminum arms. The shock-absorbing landing legs are a great feature to handle those rough landings that we all have from time to time.

The integrated tail servo mount is constructed of glass fiber as well, allowing you to mount your favorite micro/mini tail servo for yaw control. The rear motor mount pivots on a dual ball bearing supported shaft providing super smooth and precise movement. As a result, the yaw control is locked-in and very precise while flying.
We offer a full line of multi-rotor electronics such as multi-rotor control board, ESC, motors and more, so it has never been easier or more affordable to get your multi-rotor frame in the air!
All necessary hardware is included. Simply add your own electronics.

Front Arm Lengths: 420mm (boom base to motor shaft center)
Rear Arm Length: 450mm (boom base to motor shaft center)
Motor Bolt Holes: 16/19/25mm
Frame Weight: 385g (w/out electronics)
28-XX or 35-XX brushless outrunner motor x 3 
25~40A brushless ESC x 3
High speed micro/mini servo for the tail (digital servo recommended) 
10~12 inch propeller (2 standard/1 reverse rotation)
Multi-rotor control board
2650~3300mAh 11.1V lipoly
4CH Transmitter & Receiver

PRODUCT ID: 9171000157

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Weight: 998g Quantity: 
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Further discounts available for registered & logged-in customers.
 Customer rated
Total of 193 discussions.
Robert  1 points - 4/16/2014
i've just assembled this kit and everything was fine up until I went to put together the rear motor assembly. The pivot shaft for the rear motor mount won't fit through the bearings. The bearings seem to fit the pivot mount fine, and the shaft is threaded right to fit into the pivot mount tube section. The bearings just won't fit past the threaded section on the shaft. Do I have the wrong pivot shaft, or are the bearings really supposed to be such a tight fit? To be clear, they aren't just a little tight, they are a tight enough fit I can't press them on with my hands and that doesn't seem right.
Succar  654 points - 4/1/2014
jpleaner  18 points - 3/29/2014
Anyone know of a compatible replacement ball linkage for this frame? The tiny threaded rod between the links has snapped.
 Drizzt 1 points
let me know if you found those ball link set, I have been looking for one for ages
 jpleaner 18 points
Check this out....
 Drizzt 1 points
In my case it is the ball head bolt with spacing i've been chasing, I found it btw, thanks anyway !
 jpleaner 18 points
Where did you find it just in case I need to some day?
 Drizzt 1 points
Check out tarot-rc's web site, you will find one under the helicopter parts section, apparently we can use a lot helicopter parts for our yaw mech.
 TrDXFilms 54 points
I found a really good replacement from E FLITE. I have a video on my y o u t u b e channel ( true test rc ) all one word. Hope this helps :)
00whynot  8 points - 3/28/2014
here is mine. find the build thread on the web by searching "rc sparks 00whynot x900 build thread"
e_lm_70  703 points - 3/24/2014
Here is my x900 .. it got wood arm and cheap HK motor mount ... since my x900 got a massive crash last summer. Wood arm are way better and I also made it bigger. I'm using the cheap DST1200 motor and 3 blades prop. Control board is HK Mega with GPS, that I did add a 5611 baro for make it more precise. End result can be seen in the video. Anyhow ... not sure this x900 have any sense now. RotorBits Tricopter is looking cheaper and more flexible.
Customer Reviews
Overall Rating
Hyung Ho
Like it?
Tri-Copter frame useful side motor mount is too weak. Side motor mount replaced with all aluminum frame and integrated aluminum tail part like a good idea to reinforce the

6 comments. Reply..

Overall Rating
Like it?
good frame for anyone who wants a Tricopter frame without having to make one, no real cons that i could see. i was abit disappointed when i saw their using plan metal wing nuts (i thought they had stoppers in the middle), plus the screw holes around the center on servo horn plate for the yaw don't line up with the holes on my servo's horn, the side slots are slightly thinner then the supplied screws but are soft enough that you can "force" a screw though (i'm using HK M.G servo). both minor issues that are easily fixed. i also made a copies of the motor mounts out of 1.5mm aluminum and placed them on top of the F.G mounts to reinforce them and give them less "flex" that some F.G mounts suffer from arms are 14mmx14mm, top plate has an okay amount of room, could fit my KK2.0 and RX(FrSky V8FR-II) on the back. I'm using 10x4.7 props with a Gopro, you will see the prop tips in the "wide" setting.

No comments. Reply..

Overall Rating
Like it?
Excellent quality on the kit. The motor mounts could be stronger and stiffer but they also breaks of instead of other parts and that might be a good thing. The frame was easy to put together and all parts fits well. Instructions is a drawing of parts and enough to understand even where to put washers. I bought this frame as a cheap project for fun flying but the abillity to fold the frame easily (wing nuts so done by hand) probably makes it good for mountain trips with the frame in a back pack. Video of first flight in daylight here (first flight was under a floodlight evening before):

No comments. Reply..

Overall Rating
Like it?
Overall, not impressed. The poorly printed black and white, single page instructions were almost useless. The pictures on this site are enough to get you by though. The spring loaded gear legs were not located in the proper place which caused problems when installing the motor mount screws and created interference issues. You will have to drill new holes for the pivot point if you want a good fit. 18 gage motor wires will fit down the arms. The rear motor will need an exit hole drilled in the side to allow for 18 gage wires to exit. The motors should be mounted on top of the mounts, NOT on the bottom. Prp clearance is too close to the arms and prop strikes are common. The motor mounts are very weak and broke easily. I had to make new ones out of an aluminum yardstick I purchased for a few bucks. This thing is huge in overall size but has little room for a clean install of electronics. I used the KK2 board, which is awesome! However, I cannot seem to get it to hover without hunting.

No comments. Reply..

Overall Rating
Like it?
After building the HK tricopter it would spin left or right, seemed like the servo could not find centre. I was using a digital servo HK recommended with the kit (HK922) and tried everything on the KK2 board with no luck. What did work was not using the HK servo plate that came with the kit and a double server arm instead with a full size servo (Goteck GS-9650BB) After that it flew with no problems. The instuction are no good, but looking at the pics on this page help.

2 comments. Reply.. here to see all reviews
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