E525 Quad

[Raygun]

With those second motors on 4's are not going to give you that much more rpm than the others on 3's the one's you have are a fairly heavy motor so the windings should be able to take the voltage and the rpm is not that high so the windings should not come apart at that low of an rpm. I think you would be better off with 4's on the motors you have.. Ray

[akphill]

Interesting I messed up again hu geez
I am hoping they will spin about the same but with bigger props for more lift they are matched to 10x4.5 props
Guess will have some experiments going on shortly

[akphill]

Ok have the new motors installed Exactly the same results as with the other motors.

so I asked over at rcgroups about adjusting rpm on the ff board and 3 days later I finally get a answer that there is an firmware adjustment for this problem a few others have had the same problem

but I got tired of waiting for an answer and installed thee kk board and set it up to the tx so now I have full throttle range wow what a difference

LOL so I was adjusting the gyros and the number 3 motor just quit.

The esc over heated well now I am back to waiting for new esc to show up ordered 4 of them plus a programming card for this particular esc

Question
The motors are 4s capable the new esc's are 4s capable
the KK board gets its power from the esc's 5 volts.

Am I right in that I still can run this Quad on 4s battery
and not hurt the board

[Raygun]

The esc regulators should control the voltage to 5V but having four esc's,,, each regulator would be fighting the other I would think you would have to remove the center red wire from each ESC except one otherwise you may start burning up esc's. I still think you could run your first motors on fours and be just fine. Ray

[akent]

All these manufacturers need to do is place a series diode (low dropout type) that might cost 15 cents in series with each BEC output from each ESC.
That way, you basically have redundant power, if you are running all of your ESC's from one common board.
Just a thought.
Kent

[Raygun]

Your right Kent that would work nice that would give you extra power in case one regulator started to fail good thought could you give me a link to a diode that would work? I would like to try that.. Ray ;D

[akphill]

Well it is time for another update to this drama called a Xquad

I have put my fourth board onto this frame have put 4 new esc's on this frame and have put 4 different motors on this frame
I was really getting discouraged with no success.
But fourth time is a charm here had a little luck finally
Here is some pics











I have a maiden video but it wont be uploaded till tomorrow

[19000rpm]

Persistence pays off! Nice looking Quad! How does it fly?

[akphill]

Thanks
Flys like it needs a lot of adjusting yet still chasing it around
You will see in the video when it finishes uploading

[Raygun]

Nice Phill what motors and board did you end up using??? Ray

[akphill]

I used the 30 amp esc's from hobbywing
the motors are the ones I posted earlier
and the board is a KK blueboard
and a 3s 2200 20c lipo with the esc's set to nicad battery

[akphill]

Well here is the first maiden yes it still needs a lot of adjusting

[Raygun]

I see a control issue here Phill,,, The problem is you have an exact replica of Madonna's Boob on top when the nipple gets cold in the prop draft it cause's it to dip and roll. The problem could be fixed with a D cup.... Ray

[19000rpm]

I disagree. Madonna is only a C.

[akent]

I like that nipple! For size, remember that more than a mouthful is wasted!

Nice stuff, Akphill!!

Raygun, you need a Schottky type diode with 0.5v drop. Some have less. The current rating of the diode should be about double the current you want to push.

Something like these in an axial part:
www.mouser.com/ProductDetail/Vishay-Semiconductors/SB540A-E3-54/?qs=u91jd7aysvPBbdqPu8xFAvtzBDyYPpCj8JpAT3EZV3c%3d

These drop 0.5v and have a 5 amp continuous, 150 amp surge at 40 volts.
One of these in series with each ESC power lead would allow you to have redundant power to your receiver.
If you set each ESC to 6v output, you would then have 5.5v to the receiver, which would be safe for most things.
If the ESC's are not adjustable and set to 5v, then the output would be similar to NiMh packs.

Oh, sorry, these diodes cost about 35 cents!
Kent