Get various pinion gears. The one tooth difference of these gears causes large differences of the flight power feeling. I am using the following gears in this motor test.
and also, the summary of the life time of the motor
1-1: Super Quick lecture note ----- For beginners.
1-2: Easy lecture note of motor performance -----
1-3: Lecture note for power and efficiency curve --- modified 2002/Jan.
1-4: Lecture note for real performance analysis
1-6: Lecture note for the motor size and coil turn number
--- graphical explanations.
How does the motor change for the variations of the motor size
and coil turn number ???
--- Hacker motors (B40-xxS, xxL and B50-xxS, xxL) are summarized.
The motor performance depends on the used electric speed controller (ESC).
Occasionally, some controller may not operate the brushless motor.
Hence, the combination of motor and controller is important.
In general, brusless motor is weak for over-heating.
If you install the brushless motor in your heli,
please examine it from higher gear ratio (less teeth pinion gear).
Here, brushless motors for EP-heli are discussed.
Especially, I examine only 'idle-up mode'
in which full power throttle (100%) is maintained for variable ptich control
(see my setting data indicated in EP SR acrobatic flight stage).
So, this is acrobatic use, but not aimed for long flight duration.
This heli has high geared drive system (for low-power brushed motors). So, it is generally not good for powerful brushless motors. The less than 22T pinion gears (module0.8 or 32pitch with 3.17mm axis shaft) are sold in Towerhobbies (USA). In addition, 24,25,28,30,32T(module0.8) with 5mm shaft are available in Japanese gear companies. Please find similar gears with module0.8 or 32pitch in your country.
The motor mount plate must be also largely modified due to the large pinion gears. E.g., see Mr.Tsuruta's web site from my link page. Anyway, since I have not Joyager-E, the following data is rough. But, the word 'powerful' used in this table, means that the input power reaches, at least, 250W !!! at the max pitch. So, in fact, these conditions are sufficiently flyable. However, I don't know if hard-acro flight is possible ??????, because this heli is very heavy. Try it by yourself.
| Company and type | weight, KV | commnets |
|---|---|---|
| AVEOX 1406/2Y(3.17mm shaft) | 190g, 3300 | Flyable with 20-22T + 8cells |
| AVEOX 1406/2Y(5mm shaft) | 190g, 3300 | Powerful flight with 24T,25T + 8cells |
| Hacker B40-9L (3.17mm shaft) | 150g, 3300 | Powerful flight with 16-22T + 8-9cells |
| Hacker B50-13S (5mm shaft) | 200g, 2750 | Powerful flight with 28-30T + 8-9cells |
| Hacker B50-14S (5mm shaft) | 200g, 2600 | Powerful flight with 28-32T + 8-9cells |
| -- | --- | -- |
| -- | --- | -- |
Get various pinion gears. The one tooth difference of these gears causes large differences of the flight power feeling. I am using the following gears in this motor test.
13,14,15T----- These gears are supplied by Asami in Tokyo (Japan).
17,19,21,23T----- These gears are supplied by Beltec in Mie Prefecture in Japan.
These gears are module0.75(metric) which is exactly matched with EP Concept. Instead of these gears, 12-22T which are module0.8(metric) or 32pitch(inch)) are usable. The gear meshing is wrong (loudy) but usable. These 12-22T are sold at Towerhobbies and so on in USA as RC car's gears.
The data shown here may be slightly modified by the used main rotor and so on. Most of these gears have 3.17mm hole, but in the next tests, I am rarely using some 5mm hole gears depending on the motor.
| Company and type (+ ESC) | weight, KV | comments |
|---|---|---|
| AVEOX 1406/1.5Y + AVEOX L160C | 190g, 4000 | Flyable with 6-7cells, Cheap price. |
| AVEOX 1406/2Y + Kontronik 3SLB40-6-12 | 190g, 3200 | Powerful flight with 7-8cells, Cheap price. ===>> The endurance test is here @ |
| Hacker B40-8L | 150g, 4000 | Usable for 6-7cells.
With 15-16T gear, 7cells is good for acro.
----(recommendation !!!) For the new motor produced after 2000 year became 3700KV. Use pinion gear which has more teeth by one. E.g., use 16-17T for 7cells acro. The spec. of new motor is shown here |
| Hacker B40-9L | 150g, 3750 | Usable for 7-9cells.
With 15-16T gear, 8cells is very good for acro.
----(recommendation !!!) The new motor produced after 2000 year became 3300KV. Use pinion gear which has more teeth by one. E.g., use 16-17T for 8cells acro. The spec. of new motor is shown here |
| Hacker B40-10L | 150g, 3300 | Usable for 8-10cells.
With 14-15T, 9cells is good for acro but 9cells2400mAh
may be too heavy for this heli ?
With 14-16T, 8cells is good for long duration flight (= mild flight).
----(recommendation !!!) The motor produced after 2000 year became 3000KV. Use pinion gear which has more teeth by one. E.g., use 15-16T for 9cells acro. The spec. of new motor is shown here |
| Hacker B40-11L | 150g, 3050 | Usable for 8-10cells.
With 14-15T gear, 10cells is very good for 3d acro.
Use 10cells1250-1700mAhSCR. Or,
8cells2400-3000mAh is good for long duration flight (= mild flight).
In fact, 10min is OK with 14T and JRC washout rotor.
(recommendation !!!) . The motor produced after 2000 year became 2800KV. Use pinion gear which has more teeth by one. E.g., use 15-16T for 10cells acro. The spec. of new motor is shown here |
| Kontronik KBM42-30 | 180g, 3000 | 7-8cells, The production is stopped. This motor was replaced by BL500-30. Note the 5mm shaft. |
| Ikarus X250-4 | 180g, 2200 | Flyable with 28T for 8cells. Acro is OK. Cheap and cooling fan is also good. But, the KV value is too low....@ |
| Plettenberg HP220/20/A3SP6 | 175g, 1950 | Not available due to the very low KV (= low rev. motor) for 8cells. |
| Hacker B50-15S | 200g, 2450 | good for 8cells, but special 23T(5mm shaft) is required. |
| Hacker B50-14S | 200g, 2600 | very good for 8cells, but special 23T(5mm shaft) is required. |
| Hacker B50-13S | 200g, 2750 | extremely good for 8cells, but special 23T(5mm shaft) is required. ---- (If you have the gear, recommendation !!!) |
| Kontronik BL400-40 (= Hacker B40-11S) | 115g, 4200 | very good for 7cells. Suitable for light weight heli. ---- (recommendation !!!) |
| HP220/20/A3SP6 | 175g, 1950 | This motor was measured again. But, 10cells and special 23T(5mm shaft) is used here. |
| HP220/20/A4SP4 | 175g, 2310 | recommnded for 10cells acro. But, with special 21T(5mm shaft). |
| HP220/20/A2SP6 | 180g, 3050 | recommended for 8cells acro. But, with special 21T(5mm shaft). |
| Hacker C40-14S | 150g, 3040 | @ good for 3d acro with standard 16T and 10cells |
| -- | --- | -- |
This heli has 1-step reduction gear system.
So, low rev. (low KV value) motors is suitable.
Ikarus sells various pinion gears for 5mm and 3.17mm axis shaft.
Note that less than 13T pinion gears is not available for
5mm axis shaft.
| Company and type (+ ESC) | weight, KV | comments |
|---|---|---|
| Ikarus X250-4H , X250-4 + Shulze booster40be | 180g, 2200 | Normally good for 8-10cells. Acro is OK. Its internal cooling fan is good. Cheap price. |
| Ikarus X250-6H | 180g, --- | Normally good for 8-10cells. This motor is milder (= powerless) than X250-4H. Its internal cooling fan is also good. Cheap price. |
| Plettenberg HP220/20/A3P6 | 190g, 1950 | very good for 8-10cells. 10cells is super-acro. But, it may be a little expensive ? |
| Hacker B40-11L(old) | 150g, 3050 | 8-10cells, 10cells is extremely powerful but the size is too small ? 8cells is very good for mild flight. For the motor producted after 2000 year, use more teeth pinion gear by one tooth than the old motor, to get the similar power feeling shown here. |
| Hacker B40-12L or -13L | 150g, -- | These motors are milder than B40-11L. 8-10cells is very good for mild flight with 10-15T (3.17mm shaft). The light weight is good for long duration flight. |
| Hacker B50-14S | 200g, 2600 | 7-8cells, 8cells is good for acro. (B50-13S is also good.) |
| Hacker B50-15S | 200g, 2450 | With 10cells and 13T, 'crazy' power. Instead, note that mild gear ratio is impossible for 10cells, at all. 8-9cells may be good for long duration flight (= mild flight). |
| Hacker B50-16S | 200g, 2380 | With 10cells and 13-14T, powerful flight. Crazy ! Instead, note that mild gear ratio is impossible for 10cells. 8-9cells may be good for long duration flight (= mild flight). |
| Hacker B50-17S | 200g, 2300 | With 10cells and 13-14T, very powerful. Good for 3d-acro. If you like mild flight(= long duration) with 10cells, B50-18S, 19S or 20S is better. Otherwise, use 8-9cells for long duration flight. ---(recommendation for 10cells 3d-acro !!!) |
| Hacker B50-18S = Kontronik BL500-20 | 200g, 2100 | Very good for 10cells. Use 13-16T gears. 13T is mild gear ratio. Kontronik BL500-20 is OEM from Hacker ---(widely recommendation !!!) |
| Hacker B50-19S | 200g, 1960 | Very good for 10cells long duration flight with 13-17T gears. If you like acro, go to B50-17S or 18S. Oppositely, if you like ultimate long duration flight, B50-20S will be better than this motor. ---(widely, recommendation !!!) |
| Hacker B50-14L | 250g, 1750 | 10-12cells, crazy powerful. Ultimate !! Even in hot summer and tropical hot countries, ultimate hard acro flight is possible. Use powerful battery. --- (recommendation !!!) |
| Aveox1409/2y | 230g, 2000 | good for 8-10cells 5mm and 3.17mm shaft are available |
| Actro-c5 | 140g, 1470 | Not so powerful. Usable for mild flight. ESC problem ? |
| -- | --- | -- |
|
Kyosho K-speed Magnetic Mayhem
| 200g 2780 | This is a brushed motor !! Buy the reverse version for ECO8. |
Actro24-4 and Kontronik Tango45-06 --- usable for 20-24cells Logo20. Tango45-06 is recommended
for acro flight.
---- Hacker B40-8S+gear, B20-12L+gear, Graupner brushed motor S400 and so on.
A-4: The life time of the motor magnet (about the power limit)
---- Read the summary, firtsly. (2000/9/20)
---- The flight performance is finally determined by the battery performance.(1999/12/15)
A-2: The gear ratio for EP Concept SR
---- (Only in Japanese, but many photos avail. 1999/11/15)
These brushed motor is very cheap, so that these may be good for beginners. As follows, many motors had been stopped to be producted. So, please find motor with similar specifications, which will show similar performance. For EP Concept SR and Voyager-E, 12 and 13T gears are sold in Towerhobbies (USA) and 13T is also available in Asami in Tokyo (Japan).
| Company and type | coil turn and winding | weight, KV | comments |
|---|---|---|---|
| Yokomo M213 | 13turn double | 170g, -- | EP Concept SR is 12-14T for 7-8cells, This is the best class motor for EP heli. |
| Tamiya Dynatech02H | 13turn double | 170g, -- | EP Concept SR is 14-16T for 7-8cells. This was very popular motor for various aero-models in Japan (production was stopped). |
| Yokomo Beta213 | 13turn double | 170g, 4900 | EP Concept SR is 13-15T for 7-8cells, Similar to that of M213 (above). This was recommended by Mr.Shiraishi (production was stopped). |
| Yokomo 23SL | 23turn single | 170g, 3350 | EP Concept SR is 7-8cells. In recent Japan, 23turn stock motor is very popular for RC car race, due to the regulation. Flyable with 7cells+21T, but the power is not so ......... 2000/8/29 |
| Yokomo Prostock II D213 | 13turn double | 170g, -- | EP Concept SR is 12-14T for 7-8cells. Very cheap. The cost performance is very good. Note that the motor timing is fixed for normal rev. direction. (no data shown here) |
|
Kyosho K-speed Magnetic Mayhem
| 22turn single | 200g, 2780 | good for 8-10cells ECO8. Popular and cheap for various aero-models. Available in Towehobbies(USA). This motor timing is fixed, but in addition to the normal rev. version, there is reverse rev. version. |
| -- | -- | -- | -- |
| -- | -- | -- | -- |
Two tach-meters. The precision is 10rpm for handy-type one and 1rpm for tailboom-mount type. Note that some the other tachmeter for airplanes have the precision of 100rpm, which is too rough for heli.
Clamp amp meter, digital tester (used for voltage) and talking timer (count down is called in English. Very convenient in flight.)
From the left, a discharger (made in Japan (Shinwa), 6-10cells NiCd is useable.) and two chargers (KO212 (KO-propo (Jpn)) and Delcom2900B (Schein-Technica (Jpn).)). The upper one is a non-contact thermo-meter (Yokomo (Jpn)).