650 Quad Build- RcMumbai frame review.

Started by ashimda, August 01, 2014, 10:12:11 PM

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ashimda

After my 250 mini Quad, I wanted to make something a little bigger. Trying to cram all the electronics on such a small frame was like Mission Impossible, so my next quad would have to have decent real-estate. First choice was the  TBS Discovery, a well thought out frame, and not to pricey, but shipping just pushes the price up. Then I started looking at the Q/F450 frames. I just couldn't make my mind up. Then came the Tarot 650 frame. A bigger frame than I had planned so I did a little research.
I decided that since a Gimbal was on my future agenda the Tarot frame was the one to build.
I had already ordered Sunnysky 980kv motors(for the TBS disco) from Chintal (RcMumbai) and after a lengthy conversation, he convinced me to go for a 650 frame similar to the tarot but in his words "much better". I have previously purchased from Chntal and frankly I trust the guy's advice.
So I made my Purchases, let the build begin.

1x 650 CF quad frame. RcMumbai make.
4x Sunnysky 980kv motors. will upgrade to 600-700kv later.
4x 40 amp ESCs. 4 cell capable.
4x 10/4.5 props.
All required hardware.
Naza lite I already have.

yash10896

subbed for sure :D
was waiting for it sir...
looking forward to a in depth review+build :)

Regards
yash :hatsoff:
Challenges are what make life interesting and overcoming them is what makes life meaningful

chintal

I hope your satisfied with the quality of the frame sir
Rcmumbai.com
Passion is Airborne

ashimda

On first inspection the frame looks pretty good. Finishing of plastic molds are nice and the CF plates and booms are well finished. The fasteners supplied with the frame could have been better, but I'm just nitpicking. Instructions are pretty much non existent so you will have to use a little common sense. There are a couple of diagrams on the instructions which are enough to assemble the frame.   

ashimda

Motor mounts supplied, are good. They are designed so that after fitting the motors are level. There is also provision to mount the esc's under the mount, which will aid cooling.

SideWinder

Ashim, the esc's are overkill, but it doesnt hurt if your copter can carry them.

Whats the weight of the frame? The think motors are small for the purpose but you already plan to upgrade them. Also its suggested to use 4s lipo with 9" or probably 8" props(if AUW is low). 10" wont be efficient and will warm up the motors a lot. Those motors on 4s with 9" prop can take on 1.7/8kg perfectly, Anything above that would affect flight characteristics.

ashimda

Thank you SideWinder  for pointing out my mistakes. After your pm, I did a little reading and found that I have mounted my Esc's in the wrong location. Extending esc to battery wires will eventually kill my Esc's. I should have extended the esc to motor wires.
Since I have nearly finished my build, I will keep this configuration and hope the overkill esc's survive. 

ashimda

Many large quad frames have provision for mounting esc's on the boom near the motor. Just because you can doesn't mean you should. Since this knowledge came after the act, I will rectify it if and when needed. 

roshan.dixit


yash10896

@ashimda sir but mainly nowadays all of cf multirotors come with under the motor mounting system how will they not think about the overkilling of esc's???
Challenges are what make life interesting and overcoming them is what makes life meaningful

ashimda

Like I said they provide but you should not fit them there. See if you can find an image of the Tarot or similar quad with the ESC's mounted near the motors. I couldn't find one, reason being close to the motors means far from the battery.

@roshan I haven't maiden-ed it yet, maybe this evening.

ashimda

I found out (the hard way) that you should attach the CNC landing gear mounts on the underside of the bottom plate, before attaching the arms and top plate. Easy mistake for a beginner like me.

The naza along with power module and the  Frsky RX have enough room on the bottom plate. In fact there is room left for Fpv equipment as well.

Nearly finished. After all the electronics are fitted, then the top plate can be fitted and secured. With just the power distribution board on top, covered by the battery plate, The quad looks clean and tidy. Pretty pleased. 

ashimda

I haven't purchased a gimbal yet, so the Mobius will have to do for now. Made a little mount out of small tripod I had lying around.
All that's left now is to maiden this machine. I hope the weather clears tomorrow, will post video then.

roby

 the hell i missed it :'(
bought a tarot 650 week back, this looks 1000 times better, and much cheaper..
kudos chintal

rohan123

which flight controller are you using???

yash10896

@rohan123 ashim sir is using dji naza lite with gps...
Challenges are what make life interesting and overcoming them is what makes life meaningful

rohan123

is there a specific kit for all this stuff??

yash10896

@rohan123
1.the frame is bought from chintal(RcMumbai) you can check his sale thread
http://www.rcindia.org/for-sale/list-of-product-for-sale-on-rcmumbai-com/

2.dji naza lite is also available on RcMumbai just contact him through pm

3.and all the other items(motors,esc,wire,battery....) are also available on RcMumbai

so all in all everything you need to get your quad up in the air is available with him :D
just contact him :)

Regards
yash :hatsoff:

Challenges are what make life interesting and overcoming them is what makes life meaningful

rohan123


chintal

Thanks for the information yash
And Ashimda  thanks for this review it is a perfect one
Rcmumbai.com
Passion is Airborne

ashimda

"Perfect".... We will see after maiden.

chintal

Sirji perfect for the review of frame
i already know your builds are quiet good
Rcmumbai.com
Passion is Airborne

ashimda

Terrible weather today with rain and wind gusts up to 30km/hr. There was a break in the weather and some sunshine so braved the winds and went for a maiden.
The second video has some jello which I fixed this evening.




https://www.youtube.com/watch?v=1-linKoRmX4&list=UUbhq3-nRdOwPO6whyfeyAGA

ved

Really appreciate your build and flying. Congo for the first flight.
Turnigy 9x w. Er9x | Custom Hovercraft |Scratch Build Boat | Tricopter | Skysurfer V3|

ashimda