Anyone Running Brushless Tail Motor Here?

[Super-Hornet]

Hi all

I finally succesfully created a working brushless motor out of CDROM. It is quite small in size. The diameter is around the same size as Himax 2015-4100 motor. Initially I use thin wire and I can coil at 19Turn but the torque is weak. I then recoil with thicker wire and therefore I can coil up to 10Turn per pole. Anything more than that will have very thick pole.

With that motor, I can use EP4025 blades (The shaft is from IPS shaft) and the power IS STRONG but it can draw more than 4Amp using that blades and around 75% total throttle.

I initally wanted to build for main motor (My main is Himax 2025-4200. As u know it is heavy. It is 68Grams...i think) but recently i purchase 1 PHX-10 and 1 Himax 2015-4100 motor. This 4100 motor is the same weight as EM300 (48g).

With that, I was thinking whether shall I use my CDROM motor for tail motor instead? I can use back my PHX-25 for main and the new PHX-10 for tail motor or I go and purchase another PHX-10 (Cost = S$110. Is that expensive or ok?) so I have lighter weight.

So what do u all think and recommend?

Thanks for reading this long post.

Super-Hornet

[Super-Hornet]

BTW... I use the stock CDROM motor instead.
Also, Can someone tell me or show me the size of PHX-10? The PHX-10 I purchase may be new design. It is half of PHX-25 size. Its microcontroller/microprocessor is 1/3 the size of phx-25.

Super-Hornet

[MicroHeli-Nut]

Erm, just to help out:

Hornet, ya can go Ikarus BB and do a search.( the function's a bit screwed so u have to ask around).

The current details of the completely brushless Piccolo is something like this:

Main: CD-ROM 13turns, 0.4mm wire, 10 tooth pinion

tail: CD-ROM 18turns, 0.3mm wire, 3x3 prop.

Both on a Phx 10 exc. If i'm not wrong , there's something with advanced timing on the tail Phx 10 that must be enabled or something.....

[FDC]

Check out this thread which pictures a very nice looking custom built cdrom tail motor. Can't understand it though as the site's in mandarin. Maybe you can get more info from this thread if you can understand it.

http://maxbbs.tsimtung.com/cgi-bin/forums.cgi?forum=34

[FDC]

Ooops...wrong link. Here is the correct one:

http://maxbbs.tsimtung.com/cgi-bin/t...pic=128&show=0

[Super-Hornet]

Thanks FDC for the link. Actually I saw a few more in RCGroups.

I just wonder do anyone of u running brushless tail motor? I still thinking of whether to replace my perfectly working CN12-RXC DD motor to this home made motor (Much powerfull than CN12-RXC) or not. If I going to go for it, I think it would be better to get another PHX-10 for it (One for Main and One for tail).


Super-Hornet

[Fit]

The cost of running a BL tail is just way too high...
You sure have a lot of cash to be running two CC esc's in a $100 over dollar heli, driving a $5 cd rom motor...

4A is way too high for a tail. 10T is too low. Best if you follow the guideline given by Ray.

I think its more cost effective to just run the IPS direct drive or geared than to be running a BL tail motor. The IPS will last a long time before it goes.... Also the CD ROM tail would be heavier than the 15g IPS. Unless you get notebbok drives, it will end up being tail heavy.

BTW, may I know where you got your CNRX12C motor from? So far all I've found from the LHS seems to be the RL12C... non of the motors has any info on whether its the L or X version on the tags. Been looking around but haven't find the XC yet...

[MicroHeli-Nut]

Hornet,
the cdrom tail for the one i read came from a floppy drive or some thing around that size... i have the video.... if u're on MSN tonite i can probably upload it to you or something..... it's 9.7megs...

[Super-Hornet]

Hi all

My aiming is to go complete brushless but so far do not have small and lightweight motor for tail. The CDROM motor I have is very small...therefore, I can't just wound with the amount of turn given by Ray.

Tonite I tried again on the motor and it sure very powerful. I improve a bit further with now drawing 2.5Amp. But I might not use that motor due to I notice that with 10turn, the Brushless controller turn warm to hot feeling. Looks like I need higher turn but the stator I have can't. Time to look for other motor now.

As for CN12-RXC, I think LHS do not sell CN12-RXC series. What u get is RLC. So, to get RXC, I go and bought IPS instead. It is more expensive but at least I get RXC.

Super-Hornet

[Fit]

Super, what size wire did you use for the tail cd rom motor? Since the fixed factor here is the size of the stator then,
try using wire from an old IPS or the original cd-rom's wire. Usually these wires are quite small and thin. A correct size would probably be able to fit 18 turns.

Hmm 2.5A at full throttle is not too bad since it seldom uses full power in the tail in a hover. If thats the amp draw with a 10T, the amp draw with a higher turn motor could possibly be made to run under 1.5A?

If you're looking for a wide stator you could probably try older drives. They usually have roomier stators and are much easier to wind too. I think the floppy drives motors are also quite roomy yet light and small. I have seen some shops selling extracted notebook drive motors. Try Koba electronics at People's Park (the one opposite the sub-courts) on the 4th floor.

[waycool]

just a thought... do we have any computer guru here? cause i have recently seen cooling fans for pc that has 3 wires. all along i know it is only a 2 wire dc motor in those fans but new ones now has 3 wires. does that third wire mean signal wire like a brushless motor? heard those fans can be connected to a device to regulate fan speed. sounds suspiciously like a brushless! i try to look at the motor in a clear cased one and couldn't see any brushes. BTW, they are at about $18. maybe i should buy one and hook up to a p10 to try. any thoughts?

[Super-Hornet]

Hi all

Tonite I decided to go brushless tail motor! Last nite my CN12-RXC died (I think brushes worn out liau. Being using it since mar 23, 2004)

The CDROM motor that i created uses wire about double to triple the thickness of CN12-RXC wire. I tried using CN12-RXC wire before where I get 19 turns but the speed is too slow. I didn't change the cdrom magnet. I just use another CDROM motor magnet instead (other cdrom cup)

The CDROM motor I created is powerful enought that I do not required gear/pinion. I use Direct Drive.

Once I completed my transformation I will post it in here...assuming it works perfectly.

As for Computer Brushless Fan, well those 3rd wire is actually a feedback signal for your motherboard to read the spinning rate. If you open up a Computer Fan, u will notice that it is 4 poles but the actual pulses it use to drive the fan is 2 phase. So, that means u can't use those controller to drive CDROM motor or Himax or any commercial brushless motor.

Super-Hornet