Himaxx or Feigou for FEDA?

[HZM]

While I am thinking of changing my main motor, I would want to consider brushless for it tho had a almost NIB graupner on the desk......

I knew some of u guys use brushless on FEDA, but can it operate on 2S or u guys going w 3S? Share a small pc of yr story and I see if I will jump onbroad

Thanks

Mike

[loyn]

Yap I am interested on the Himaxx (4100 rpm type) too, which can be used for both heli and plane due to its small size (with my CC P-10). Any feedback on its performance on 2 cells? I am not going for 3 cells yet as it may put too much strain on both the motor and controller. BTW my charger only able to handle 2 cell

Mike don't mind keep me inform about the availability and price of the motor. As I like to find out will it be cheaper to get in locally or from US.

[Tele]

I am running the Feigao Bl on mine and its fine ..using a 14 tooth pinion from NTC and had to drill it out to 2.3 mm as the feigao is a hacker copy and they have also copied the 3/32" shaft size...(duh!!)..easy fixed with a drill and a higher toothed pinion.

need to run the higer tooth pinion as running it with a 10-12- or even a 9 tooth the motor go too hot..way too hot. the higher pinion means that the motor spins faster and is not as hot ( a bit less then the stock 370 with the hornet blades)

The himax I think has about the same amout of power as the feiago if anything maybe a bit more but the smooth 2mm shaft makes it hard to get the pinion to stick..esp with the tourque it produces.. and but using some mini z parts with a 12 tooth pinion still may not give you the reduction (or increase) in speed that you need.

Just my two cents worth.

cheers doug

[Tele]

Originally posted by loyn
Yap I am interested on the Himaxx (4100 rpm type) too, which can be used for both heli and plane due to its small size (with my CC P-10). Any feedback on its performance on 2 cells? I am not going for 3 cells yet as it may put too much strain on both the motor and controller. BTW my charger only able to handle 2 cell

Mike don't mind keep me inform about the availability and price of the motor. As I like to find out will it be cheaper to get in locally or from US.

I got mine in a package with the himax and cc-10 ..it worked out to be about $160 sgd for the package. much cheaper ..got it from aircraft world.

doug

[loyn]

I think super_hornet is using Himaxx on his heli, wonder what pinion size is he using Super_Hornet are u there any input???

Tele just a though, smaller the pinion mean slower the output head speed with faster motor speed with higher output torque to overcome load on the blade. (high reduction gear ratio) Does that means the motor should heat up faster?

[HZM]

Ahem.... I had HPI Micro RS4 metal pinion w set screw...all NIB....from 8T to 13T

They works perfect for FEDA

Mike

[HZM]

OOOps...left out they are for Diameter 2mm shaft

Mike

[Super-Hornet]

Hi all

Sorry for slow response.. I was busy at work related recently.

OK...
I have Himaxx HA2025-4200 and HA2015-4100.

Here is my experience.

For Himax, the first sets of number indicating what type/model/size it is while the 2nd sets of number is the RPM/V or KV. If u check out internet, some say that the higher the RPM/V, the lower the torque power it has (on the same mode/size)

So, if look at 2025-4200 and 2015-4100, u might think 4200 has lower torque than 4100 because of its higher RPM/V BUT it is rated as 15Ampere as compare to 4100 of 10A

I use 10Teeth for my HA2015-4100. I think u can use 8Teeth if your chopper is light or your blades has lower AoA. I personally prefer 10Teeth.

If u look at Himaxx website, u will notice that it says HA2015 series is for:
Replace 280/370, B20S, Astro 010, Razor. Fits GW 100/300 gearbox, Hummingbird, Piccolo, mini T, HPI Micro

where HA2025 series is for:
Replace 380/400, B20L. Fits GW 100/300 gearbox, Hummingbird, Piccolo, mini T, HPI Micro

http://www.maxxprod.com/mpi/mpi-26.html

Take note that HA2025-4200 series, the older version is 2.3mm Shaft. Mine is 2mm Shaft.

If u own Zoom or anything for that size, then I recommend HA2025 instead. If u going to use for Hummingbird/DFly or Hornet, then go fo HA2015-4100. U can go for HA2015-5400 also can but u need to use PHX-25 instead because it is rated as 15A.

BTW...some minor mistake by Tele... It should be lower teeth pinion will have your motor spin faster in order to reach the same rotor blades spinning RPM as compare to higher Teeth pinion. The different is that higher teeth will stress your motor higher than lower teeth but for lower teeth pinion, u need higher throttle percentage to achieve hover. Therefore lesser headroom for your throttle.

Super-Hornet

[Super-Hornet]

BTW... I think for the same category (Same RPM/V), Himaxx is the cheapest but do take note that Himaxx is not the lightest b/l motor.

Super-Hornet

[Tele]

sorry yes Sup' hornet you are right ..I was mixed up a bit.
had it back the front in my mind


cheers.

[loyn]

Thanks for all the information super_hornet, this help to shorten the decision curve on the motor selection. I think I will stay with Himaxx 2015-4100 so I need not to get another ESC.....save some $$$$$

[HZM]

Wah...guys thanks for the input.... post question here more effective than searching high and loe else where

Btw, did you guys use 2S or 3S? Like loyn, I don want to put 3S on FEDA. If basing on Super hornet..... then I can use HA2025 for my piccolo pro ? Thanks in advance


Mike

[MicroHeli-Nut]

Mike i think better go 3S. When u go 2S, u are basically 'running on current'. I'm not a good motor head, but then to go on lower cell count we need to find one motor with high kV.... And high kV motors pull lots of amps.

[Super-Hornet]

Hi all

I use 3Cells of 1500mAH Kokam. I think already in B/L when I start using 2Cell 1500mAH.

Both Himaxx and CC can withstand 3Cells without any problem so u won't have any problem going 3Cells.

Few things to take note from my experience:

HA2025-4200
-----------------
1) More heavier than HA2015-4100
2) More RPM/V than 4100...therefore, running at 3Cells, u can have 12.6 * 4200 = 52,920RPM (in Theory) as compare to 12 * 6 = 4100 = 51,660RPM
3) More torque power than HA2015-4100. (4200 rated as 15A as compare to 4100 of only 10A)
4) Need to use PHX-25 or higher....unless u don't mind having a risk PHX-10 burn out.

2Cells vs 3Cells
-------------------
Calculating Wattage, suppose your chopper need 15Watt to hover, then:
2Cells => A = W/V = 15/8.4 = 1.78571 Ampere
3Cells => A = W/V = 15/12.6 = 1.1904 Ampere
That means your 2Cells will run hotter than 3Cells.

3Cells is 1/3 more heavier than 2Cells (On the same AH comparison). Therefore, your motor need to spin faster than 2Cells to achieve same lift. Then if u compare RPM/V, The throttle percent might still the same for both due to higher voltage. With that, the advantage of having 3Cells is your main blades spin much faster...therefore more stable. Another advantage is that now your chopper is heavier and therefore more stable. (more immune to wind or downward wind from rotor blades) Your flight might get increase also (due to lesser current drawn from chopper) but not much.

Disadvantage of 3Cells is:
Since now your main blades spin faster than 2cells, your counter rotation generated by main blades might be higher. With That, your tail motor might need to spin faster...therefore more stress to the tail motor.

Another disadvantage is that your chopper are now much heavier, if u crash it, the inertia energy stored are higher and therefore u sustain more damage.

Note: For those running Shaft/Timing Belt Tail rotor (Like Hornet, Zoom), I would recommend using either HA2025-4200 or higher voltage cells.

Super-Hornet

[Super-Hornet]

Oh.. one more thing... I don't know about Feigou, for Himaxx, it is inrunner. Therefore, the coil is closer or at the casing. Therefore, simple cooling heatsink should be able to cool the coil much better than outrunner.

Super-Hornet