RunRyder RC Helicopter Topic - Brushless Motor for Eco-8

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e-Ikarus Piccolo-Eco 8/16 > Brushless Motor for Eco-8

Rob_T
Elite Veteran
Location: ..

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2000 or 3000 is the capacity of the battery expressed in milliamp-hours. In round terms, a 2000 will run an Eco 8 for about 8 minutes, the 3000 will give you about 12 minutes. (This is for gentle forward flight, 3D flying will give considerably less).

9.6V is the "nominal" voltage of the battery, sort of an average number somewhere between fully charged and empty. Like I said, straight off the charger your battery is going to be somewhere in the 11V to 12V region. Depending on your charger it may actually get a bit higher than that during the charge.

09-21-2007 Over year old.

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speedyjo63
Heliman
Location: Melaka,Malaysia

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Thanks alot Guys,very very helpful and thankful.....will see what happen next?

6 grand in Heli and I still cant Hover

09-21-2007 Over year old.

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Scott99
Heliman
Location: Nelson, New Zealand

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H8 versus newer H8 motor?

can anyone tell me what the advantages are between the original red H8 motor and the newer H8 design?

12-04-2007 Over year old.

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BeltFedBrowning
Veteran
Location: Albany, MO USA

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H 8

I have one of the red H8 motors and it is ok for hovering. It will bareley fly in my Eco 3S 4000 lipo. Some of the guys were talking about this when I researched it but I had to find out for myself. I put the Jeti 30-3 back in and put a 4S lipo on it, big difference. I hear the best motor for 3-D power is the Century 550. I am going to try one soon.
It looks like they just detuned a H-16 motor to make the new H-8.

12-05-2007 Over year old.

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Scott99
Heliman
Location: Nelson, New Zealand

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Red H8

are you able to elborate? did you have the correct gearing to suit whatever revs per volt the red H8 is?

12-05-2007 Over year old.

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BeltFedBrowning
Veteran
Location: Albany, MO USA

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Gearing

I tried a few gear ratios to try to make it better. I have all the pinions from 15 to 24. I sped up the head with a 24 and it was ok until you put a load on it, then it lost headspeed fast. In a full throttle flair it would go from a happy 1900 rpm to 1300 (estimated) and was nearly uncontrollable. I tried a 17 tooth pinion to increase the power of the motor, This was great for FFF but didn't attain foreward speeds I wanted it to. The last pinion I tried was 19 tooth. I got about 1750 rpm (no load) and it flew a little better, but in an emergency there was no reserve power. This caused more than one crash.
They said not to use a 4 cell lipo with the red H-8 so I never tried it. I was just so angry at the heli that I put the Jeti 30-3 back in with a 4 cell lipo 19 tooth pinion, 1950 headspeed(no load).
This setup has power to spare and does great climbouts inverted.
I had about 20 flights on my H-8 and I bought it new. Now it is a door-stop or I might put it in a plane.

12-05-2007 Over year old.

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Scott99
Heliman
Location: Nelson, New Zealand

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ok thanks for the info that helps a lot as I have not had much time on the H8 or experience with different pinions - cheers

12-05-2007 Over year old.

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Silvashadow
Veteran
Location: Kent, UK

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BeltFedBrowining,

Why not try the H-8 back in the Eco using your 4S lipo pack. I run mine with a 22T pinion. I get a constant 2000 rpm headspeed with a Kontronic ESC in governor mode. When I land the motor is stone cold and my flightpower 3700 4S packs are bearly warm. Don't know who said not to use a 4S pack on this motor, it loves it. Some have even used 5S packs.

12-05-2007 Over year old.

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BeltFedBrowning
Veteran
Location: Albany, MO USA

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H-8

Are you using the old red H-8? It seems like a really smooth motor. If it will stand 4s then I might try it. Mine just didn't have any grunt with 3s. It made for very relaxing flights when it wouldn't climb or go fast FF. I wondered if there was something wrong with it, it was that gutless. Like you said it never got hot and sounded smooth. ----Thanks for the tip, I have nothing to loose by putting a 4s on it.---

12-06-2007 Over year old.

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Scott99
Heliman
Location: Nelson, New Zealand

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Red H8 KV??

Does anyone know what KV or "revs per volt" the old red H8 is rated at as compared to the newer AXI style one? this info seems hard to find.........

12-06-2007 Over year old.

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BeltFedBrowning
Veteran
Location: Albany, MO USA

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H-8 info

I dug out the papers that came with my H-8 (red). Here are the specs.

Operating voltage- 9.6-16 V
No. cells, NC- 8-12 cells
No. cells, LiPo- 3-4 cells
Revs per volt- 1500
Measurements- 35x48mm
Weight- 151 g

12-06-2007 Over year old.

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BeltFedBrowning
Veteran
Location: Albany, MO USA

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new black H-8

Here are the specs on the new black H-8 from the Ikarus USA website.

NiCad/NiMH cells 8-12
Li/Po cells 2-4
RPM/V 1500
Efficiency 82 %
Current at max. effic. 25-40 A (>75%)
Max. current draw 50 A(max. 60 sec.)
Size (dia x length) 35 x 48 mm (14 x 1.9 in)
Shaft diameter 5 mm (0.2 in)
Weight 151 g (5.3 oz)
Prop Recommendation 3 cell LiPo 8x4
2 cell LiPo 7x4 to 8x4

12-06-2007 Over year old.

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Scott99
Heliman
Location: Nelson, New Zealand

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many thanks

12-06-2007 Over year old.

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Silvashadow
Veteran
Location: Kent, UK

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Guys, I think 1500 kV for the Red H-8 motor is a bit high. From memory it was/is closer to 1420 kV.

12-06-2007 Over year old.

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BeltFedBrowning
Veteran
Location: Albany, MO USA

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Red H-8

Judging by the performance I got from mine I would agree with the red H-8 being less than 1500 rpv.

12-06-2007 Over year old.

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Scott99
Heliman
Location: Nelson, New Zealand

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Beltfedbrowning I'm not understanding why yours did not go well......even on heavy 12V older style NiCd/NiMh packs, (with higher internal resistance genrally) James Wang did have the Eco going pretty good at one stage some time back - even had our old timer Eco inverted, can't remember but I don't think this was even on a Brushless motor.
I gather you do understand the KV (revs per volt) does not necessarily mean it is less powerful if its given KV is less than 1500? just means adjusting pinion size as you have already done to get the best out of it.........I am convinced that I will invest in 4 cell LiPos so far, just don't want to fork out for a different motor if the Red H8 will do - particularly in light of not requiring 3D out it............

12-07-2007 Over year old.

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BeltFedBrowning
Veteran
Location: Albany, MO USA

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H-8

I will also put a 4cell lipo on my H-8 before I pass final judgement on it. Sorry for the bad attitude but I messed with it for a long time. I love my Eco. With the aluminum head I get -9,+9 with no binding. Its size is perfect to toss in the car and take to the field. Flies great in windy conditions. It is predictable inverted. Thanks for the input, I wish I had asked you guys earlier when it was still mounted.

Hey I wonder if the copper worms got in my motor? I hear they can trash a motor if they eat through enough wiring.

12-07-2007 Over year old.

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helijunky
Senior Heliman
Location: s elgin il

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motor for eco 8

i have one with the phazor motor but it burnt up.is there a brushed motor that will work good with 4cell lipo?thanks

01-05-2008 Over year old.

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BeltFedBrowning
Veteran
Location: Albany, MO USA

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I used the sport motor that came with my first eco with a 4 cell lipo. It had crazy crazy power. I don't know how long it would have lasted but it didn't seem to get that hot.

01-05-2008 Over year old.

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helijunky
Senior Heliman
Location: s elgin il

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what controller were you using?thanks

01-06-2008 Over year old.

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e-Ikarus Piccolo-Eco 8/16 > Brushless Motor for Eco-8

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