Pictures! My RKH rotary build

[fabian1675]

Hey Kevin, (wsntme)

can you tell me where you got your GY280RX from, I'm thinking about building another 130X with this unit, I'm curious to see how it compares to the mini V.

Thanks

[wsntme]

Originally Posted by fabian1675

Hey Kevin, (wsntme)

can you tell me where you got your GY280RX from, I'm thinking about building another 130X with this unit, I curious to see how it compares to the mini V.

Thanks

Here ya go Fabian

http://9imod.com/index.php?main_page...oducts_id=2926

Took a week or just over for me to get it here in AZ from China. I was expecting to wait forever like I do with things from Banggood.

-Kevin

[fabian1675]

Originally Posted by wsntme

Here ya go Fabian

http://9imod.com/index.php?main_page...oducts_id=2926

Took a week or just over for me to get it here in AZ from China. I was expecting to wait forever like I do with things from Banggood.

-Kevin

Nice, thanks. Have you tried using the bluetooth capability?

[wsntme]

Originally Posted by fabian1675

Nice, thanks. Have you tried using the bluetooth capability?

The most I have done so far is get it powered up, bound to my Tx, and verified that I can get it to connect to my PC and the Mikado software. I believe the bluetooth module is a seperate piece as I don't think it is something that I have.

It'll be nice to hear your comparison between the GY280Rx and the genuine mini v. The more people running the GY280rx the better IMO since I'm sure I'll end up with many questions .

Edit: So it look like if I want to do bluetooth setup I just need to get something like THIS? I have seen a youtube video of the GY280rx being setup via bluetooth on a walkera 120. I just checked out the video again and noticed I've mounted my FBL 180* from the one in the video....hopefully this does not present issues with setup and function of the unit .

[Picofly]

How about weight? Is GY280 lighter or heavier than the stock 3-in-1?

[wsntme]

Originally Posted by Picofly

How about weight? Is GY280 lighter or heavier than the stock 3-in-1?

Stock board weighs 7.8g with the shrink and connectors included. The GY280rx weighs in a 5g. Then you add your ESC and I'm sure together they are heavier than the stock board but I'm not sure by how much.

EDIT: Just took off my talon and put it on the scale ... with the bullets and my ghetto mounting plate the total weight of the ESC and wires is 7.5g
So basically I've replaced the stock board with equal weight(esc) AND added 5+g (fbl). I'm going to get more of this thing put together before I start worrying too much about weight.

[Picofly]

Thanks for information!

I am wondering if a 7A esc is enough...I have a couple of YGE 7S esc's in my parts box. They weight only 0,7g without wires. YGE 7 does not have a BEC but I have a bunch of 5V/1A Polulu regulators which weight only 0,6g .

[scott s]

Originally Posted by Picofly

Thanks for information!

I am wondering if a 7A esc is enough...I have a couple of YGE 7S esc's in my parts box. They weight only 0,7g without wires. YGE 7 does not have a BEC but I have a bunch of 5V/1A Polulu regulators which weight only 0,6g .

No way will a 7 amp esc cut the mustard. A phoenix 10 just makes it and that is with current limiting turned off and that is on 2s. Yes in theory the 3s is more efficient and will be due to higher voltage. But that 1102 eox 3s motor is a power house with up to 12 amp max draw!!!

[Picofly]

hmm... YGE 12 S weights 2.9g without the wires. Should I try or not? I am struggling to keep AUW of my FPV setup under 155g.

[scott s]

Originally Posted by Picofly

hmm... YGE 12 S weights 2.9g without the wires. Should I try or not? I am struggling to keep AUW of my FPV setup under 155g.

LOL! the weight without wires is irrelevant. What does it way with wires. They do not work without wires HA!

[Picofly]

Originally Posted by scott s

LOL! the weight without wires is irrelevant. What does it way with wires. They do not work without wires HA!

True, but some wires are lighter than the others!

[scott s]

Originally Posted by Picofly

True, but some wires are lighter than the others!

Don't want to hijack this thread so last post on this. You need to weigh that yge 12 with the wires that are on it! You can shorten them to fit to save a little weight. That weight listed as 2.9 grams without wires is the weight of the esc without the wires they solder to it. Not any wires that you may connect to the existing esc wires!
A foolish spec IMO. I don't know why they waste their time even giving that spec LOL!

[Picofly]

Originally Posted by scott s

Don't want to hijack this thread so last post on this. You need to weigh that yge 12 with the wires that are on it! You can shorten them to fit to save a little weight. That weight listed as 2.9 grams without wires is the weight of the esc without the wires they solder to it. Not any wires that you may connect to the existing esc wires!
A foolish spec IMO. I don't know why they waste their time even giving that spec LOL!

I was planning to replace the existing wires with lighter ones. It is easy enough way to save a couple of grams.

[SkyKraken]

Hey Picofly,

Do you run the fpv gear off the flight pack, stepped down, because I was thinking about your BEC comment, the 5v/1a regulator, that would be really close to not enough with just the rotary servos alone, any load and you risk brown out. just a thought.

[wsntme]

Well I just made about the biggest mistake you can with electronics!!! I let out A LOT of magic smoke, not sure yet how much damage I've done but I'm afraid I may have fried this entire project in one bonehead move! FML.

Esc was connected, motor was connected, fbl was connected....I fear that all three have been fried. Costly mistake. Will look into when I'm not so PO'd at myself.

Mis-wired my mini t plug on the esc, idiot.

[scott s]

OH NOOOOO! I doubt the motor would be effected but you never Know. Hopefully the esc's internal bec puffed before any reverse polarity reached the fbl unit. Maybe the fbl has reverse polarity protection. Hope, hope, hope. But your esc is probably toast.
Sorry to hear this.

[wsntme]

Originally Posted by scott s

OH NOOOOO! I doubt the motor would be effected but you never Know. Hopefully the esc's internal bec puffed before any reverse polarity reached the fbl unit. Maybe the fbl has reverse polarity protection. Hope, hope, hope. But your esc is probably toast.
Sorry to hear this.

How do I determine if my ESC is toast or not?

I just hooked everything back up, correctly this time, and it all seems to function. Motor spins up, FBL is visible is VStabi, and both are powered through the talon.

I suspected the motor damage only because one of the leads had gotten so hot that it delsoldered itself from the ESC...that's the area from which all the smoke came. Obviously the shrink tube was burning pretty good giving off smoke but I'm not sure if there is damage or not.


Nice burn/blister from where I was plugging in the battery!


Rigged up for testing

[scott s]

Do you have a volt meter. I would measure the esc's bec output before you go any further! though your fbl will take a full 2s lipo voltage it will not tolerate 3s. Or your bec may be outputting lower than 5.5 volts now. Check it and be safe first!
I bet you never make that mistake ever again!!
By the way are you nuts resting that un covered esc on top of an aluminum bearing block with screws sticking out all around it etc, and putting power thru it!! You are asking for another burnout LOL!

[wsntme]

Originally Posted by scott s

Do you have a volt meter. I would measure the esc's bec output before you go any further! though your fbl will take a full 2s lipo voltage it will not tolerate 3s. Or your bec may be outputting lower than 5.5 volts now. Check it and be safe first!
I bet you never make that mistake ever again!!
By the way are you nuts resting that un covered esc on top of an aluminum bearing block with screws sticking out all around it etc, and putting power thru it!! You are asking for another burnout LOL!

yes I know it was not the safest test setup but the ESC was actually "floating" and not touching the aluminum.

I will check the bec voltage now. Thanks!

[wsntme]

I'm getting 5.598....So I'd say that is good.

Any other things I should check before I consider myself very lucky?



I'm thinking I'm lucky I discovered my mistake with a 2s battery and not a 3!