RC India
Welcome Guest, please login or register.
 
Pages: 1 2 [All]   Go Down
0 Members and 1 Guest are viewing this topic. Topic Tools Topic Tools 
Read
« on: October 20, 2009, 01:20:58 PM »
avinash.tutu
Plane Lover
Active Member
**

Reputation Power: 1 
avinash.tutu has no influence.
Offline Offline

City: quilon
State: Kerala
RC Skills: Beginner
Posts: 41
Join Date: Oct, 2009




my motor is cobalt 400, 9 turns. 30amp.
which is the best ESC?
I am a beginner  in aeromodeling. we have made an aeroplane but during its motor test the ESC exploded, esc was E SKY EMSOA

CAN ANYBODY HELP ME?
Logged
 

Read
« Reply #1 on: October 20, 2009, 03:42:12 PM »
anwar
Administrator
Forum Hero

*****

Reputation Power: 141 
anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!
Offline Offline

City: Doha (Qatar) & Thrissur
State: Kerala
RC Skills: Advanced
Posts: 11619
Join Date: Mar, 2009

RC India - Flying and racing with open minds !



Welcome.. fellow Mallu  Wink Smiley

The rule of thumb is a little higher (like 20%) than the motor rating, so 35A or 40A ESC. 

But since you mentioned an ESC explosion, can you post your full setup, including prop and battery ? 

Also, a "9 turn" Cobalt 400 motor is not showing up in online searches, can you verify and post the motor specs/model ?
« Last Edit: October 20, 2009, 04:03:10 PM by anwar » Logged

Hangar : Please see my introduction.
RC India forum and me : About this forum.
 

Read
« Reply #2 on: October 20, 2009, 06:05:58 PM »
avinash.tutu
Plane Lover
Active Member
**

Reputation Power: 1 
avinash.tutu has no influence.
Offline Offline

City: quilon
State: Kerala
RC Skills: Beginner
Posts: 41
Join Date: Oct, 2009



   thank you for responding so soon. size of the propeller is 20-10. details of the motor are available at the links given below.           
    I need to know the manufacturer of the ESC as well as its cost .
       
        http://www.singahobby.com/images/electric/motor%20400%20cobalt.jpg
        www.maxxprod.com/mpi/mpi-26a.html
Logged
 

Read
« Reply #3 on: October 20, 2009, 06:17:26 PM »
anwar
Administrator
Forum Hero

*****

Reputation Power: 141 
anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!
Offline Offline

City: Doha (Qatar) & Thrissur
State: Kerala
RC Skills: Advanced
Posts: 11619
Join Date: Mar, 2009

RC India - Flying and racing with open minds !



20-10 prop ? Are you measuring in centimeters instead of inches ?  If it is in inches, that is an unusually large prop.

MPI has brushed ESCs that suits your setup, and there are many other brands also. 

But before that, you may want to consider other options. If you are on a lipo battery, you may want to consider moving to a brushless setup, instead of spending on a brushed ESC.  What is the weight of the plane you are putting this on ?

Before making an informed decision, the prop size, battery capacity/type and weight and type of the plane have to be verified.  Otherwise you may again run into costly power issues.
« Last Edit: October 20, 2009, 06:22:29 PM by anwar » Logged

Hangar : Please see my introduction.
RC India forum and me : About this forum.
 

Read
« Reply #4 on: October 20, 2009, 06:35:14 PM »
avinash.tutu
Plane Lover
Active Member
**

Reputation Power: 1 
avinash.tutu has no influence.
Offline Offline

City: quilon
State: Kerala
RC Skills: Beginner
Posts: 41
Join Date: Oct, 2009



i am using lipo battery  YUNTONG, 30C,1000mAh
Logged
 

Read
« Reply #5 on: October 20, 2009, 06:41:20 PM »
anwar
Administrator
Forum Hero

*****

Reputation Power: 141 
anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!
Offline Offline

City: Doha (Qatar) & Thrissur
State: Kerala
RC Skills: Advanced
Posts: 11619
Join Date: Mar, 2009

RC India - Flying and racing with open minds !



Is that a 2cell lipo or a 3cell lipo ?
Logged

Hangar : Please see my introduction.
RC India forum and me : About this forum.
 

Read
« Reply #6 on: October 20, 2009, 06:47:42 PM »
avinash.tutu
Plane Lover
Active Member
**

Reputation Power: 1 
avinash.tutu has no influence.
Offline Offline

City: quilon
State: Kerala
RC Skills: Beginner
Posts: 41
Join Date: Oct, 2009



i am using lipo battery  YUNTONG, 30C,1000mAh. prop is 20 cm in length. weight of plane is about 1.3 kg. I have already bought a brushed motor.
Logged
 

Read
« Reply #7 on: October 20, 2009, 06:51:52 PM »
avinash.tutu
Plane Lover
Active Member
**

Reputation Power: 1 
avinash.tutu has no influence.
Offline Offline

City: quilon
State: Kerala
RC Skills: Beginner
Posts: 41
Join Date: Oct, 2009



it is a 3 cell lipo.
Logged
 

Read
« Reply #8 on: October 20, 2009, 06:58:06 PM »
anwar
Administrator
Forum Hero

*****

Reputation Power: 141 
anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!
Offline Offline

City: Doha (Qatar) & Thrissur
State: Kerala
RC Skills: Advanced
Posts: 11619
Join Date: Mar, 2009

RC India - Flying and racing with open minds !



Thank you for forwarding the details.  So your prop is OK, it is about an 8 inch prop (8x4).

It is known that 3s lipos are too much for many brushed setups.  I am unable to find the specs for your exact motor since you mentioned "9 turns", and all the ones I can find are "14 turns", "11 turns" etc.
Logged

Hangar : Please see my introduction.
RC India forum and me : About this forum.
 

Read
« Reply #9 on: October 20, 2009, 07:28:16 PM »
avinash.tutu
Plane Lover
Active Member
**

Reputation Power: 1 
avinash.tutu has no influence.
Offline Offline

City: quilon
State: Kerala
RC Skills: Beginner
Posts: 41
Join Date: Oct, 2009



ACTUALLY IT IS 11 TURNS
Logged
 

Read
« Reply #10 on: October 20, 2009, 07:32:46 PM »
rcforall
Plane Lover
Forum Hero

*****

Reputation Power: 22 
rcforall barely matters.rcforall barely matters.
Offline Offline

City: Chennai
State: Tamil Nadu
RC Skills: Beginner
Posts: 1663
Join Date: Mar, 2009



Looking at the specs of the on the MPI site for the PMX4011  one can assume that the  RPM of the 9 turns if at all it  exists is higher than 16100 further the recc prop for the PMX 4011 itself is 6 x4  hence for a higher RPM motor it should be smaller if not the same . Hence it is obvious that  with a 8x 4 the amps draw has far exceeded the max amps level of the ESC .
I am surprised that the motor has not cooked itself with 11.1V and an 8 x 4 prop.
Are you sure the damage is only to the ESC  Roll Eyes
The Max amp of this motor is 23.5 amps hence a 30 amp Li ESC is a must  something like the GWS ICS 600Li.
http://www.gwsus.com/english/product/speedcontroller/600.htm


Anwar  brushed motors can work with 3 S Lipo provided the ESC is capable of handling that voltage , like GWS have Li series ESC which can work with 3 S Lipos .
BTW I agree with Anwar rather than Invest ina 30 amp brushed ESC which will cost around Rs 1400 I would rather buy a  bruhsless set up which might work out cheaper.

sai
« Last Edit: October 20, 2009, 07:37:30 PM by rcforall » Logged

www.zuppa.io : vehicle telematics, ADAS, IoT , Drones
 

Read
« Reply #11 on: October 20, 2009, 09:31:13 PM »
anwar
Administrator
Forum Hero

*****

Reputation Power: 141 
anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!
Offline Offline

City: Doha (Qatar) & Thrissur
State: Kerala
RC Skills: Advanced
Posts: 11619
Join Date: Mar, 2009

RC India - Flying and racing with open minds !



Anwar  brushed motors can work with 3 S Lipo provided the ESC is capable of handling that voltage , like GWS have Li series ESC which can work with 3 S Lipos .

Yep, that is why I was careful in saying "many".  Wish Avinash had got in touch with us earlier, since he could have gotten a brushless setup (as he had already gone for a 3s lipo etc). 

Sai - Can you propose both a brushed esc and a brushless combo with prices for him, so that he can make a choice ?
Logged

Hangar : Please see my introduction.
RC India forum and me : About this forum.
 

Read
« Reply #12 on: October 22, 2009, 12:18:57 PM »
avinash.tutu
Plane Lover
Active Member
**

Reputation Power: 1 
avinash.tutu has no influence.
Offline Offline

City: quilon
State: Kerala
RC Skills: Beginner
Posts: 41
Join Date: Oct, 2009



OUR PLANE WEIGH 1.3 KG, WITH WING SPAN 1.5M, LENGTH IS 71 CM.
  CAN OUR PLANE FLY WITH PROPELLER 6*4.?

  CAN WE USE 8*4 PROPELLER ?,WITH  
CELL -YUNTONG, 30C,1000mAh, 3S
motor is cobalt 400, 11 turns. 30amp.
FOR THIS WHAT SHOULD BE THE CAPACITY OF ESC?
Logged
 

Read
« Reply #13 on: October 22, 2009, 01:11:56 PM »
PankajC
Plane Lover
Forum Hero

*****

Reputation Power: 13 
PankajC has no influence.
Offline Offline

City: Delhi
State: Delhi
RC Skills: Beginner
Posts: 1022
Join Date: Jul, 2009

Learning to Fly



Dear Avinash,

If the motor is capable of 30amps, then atleast the ESC should be 1.2 times the max amp or about 40amps to begin with you can also go in 50/60amp
Logged

Spektrum DX6i | EP Pusher Trainer | EP CUB |
 

Read
« Reply #14 on: October 22, 2009, 01:34:22 PM »
anwar
Administrator
Forum Hero

*****

Reputation Power: 141 
anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!
Offline Offline

City: Doha (Qatar) & Thrissur
State: Kerala
RC Skills: Advanced
Posts: 11619
Join Date: Mar, 2009

RC India - Flying and racing with open minds !



ESC selection is not the only question asked.

Avinash - There are many threads here on electric power selection.  At a high level, here is roughly how it works.

1. Weight of the model determines the "watt"age of the motor.

2. Aircraft type (and in some way the flying style) determines the KV rating of the motor. With wattage and KV rating, you can pick a motor.

3. KV rating largely influences the prop selection.

4. Motor (and the prop) determines the amps drawn, and this determines ESC selection.

5. Battery is determined primarily by ESC selection.

People like Saju can add more (or make amendments).
Logged

Hangar : Please see my introduction.
RC India forum and me : About this forum.
 

Read
« Reply #15 on: October 22, 2009, 04:23:11 PM »
sushil_anand
Plane Lover
Forum Hero
*****

Reputation Power: 17 
sushil_anand has no influence.
Offline Offline

City: MUMBAI
State: Maharashtra
RC Skills: Intermediate
Posts: 1274
Join Date: Jul, 2009



I am, admittedly, a newbie to electrics and find that there is not much (useful) information available from most sellers of motors.

What I would like to see included is, at least a link to obtain the following information:

Wattage
KV rating
Graphs of current drain vs Voltage (2s, 3s etc) vs prop size

This would go a long way in helping us make a choice suitable  for any specific need/requirement.
Logged

Hangar: Zlin 50L -120, CMPro Super Chipmunk, Ultimate Bipe EP, Imagine 50, Christen Eagle 160, Ultra Stick, Super Sports Senior
 

Read
« Reply #16 on: October 22, 2009, 04:39:27 PM »
sushil_anand
Plane Lover
Forum Hero
*****

Reputation Power: 17 
sushil_anand has no influence.
Offline Offline

City: MUMBAI
State: Maharashtra
RC Skills: Intermediate
Posts: 1274
Join Date: Jul, 2009



I think this post is in the wrong place.

It could be in "selection of motor and ESC" but the foamy bit might be misleading.

Anwar, help steer it to where it belongs!
Logged

Hangar: Zlin 50L -120, CMPro Super Chipmunk, Ultimate Bipe EP, Imagine 50, Christen Eagle 160, Ultra Stick, Super Sports Senior
 

Read
« Reply #17 on: October 22, 2009, 05:52:58 PM »
anwar
Administrator
Forum Hero

*****

Reputation Power: 141 
anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!
Offline Offline

City: Doha (Qatar) & Thrissur
State: Kerala
RC Skills: Advanced
Posts: 11619
Join Date: Mar, 2009

RC India - Flying and racing with open minds !



No mention of "foamy" anywhere in this thread. Sushil bhai... kindly clarify  Head Scratching

BTW, KV ratings of most motors are highly publicised, and so is wattage of many.  The prop versus current drain charts are also available, but not as frequently.

I do see that direct questions asked by Avinash are not answered yet, like "Can our plane fly with a 6x4 prop?".  
« Last Edit: October 22, 2009, 06:22:31 PM by anwar » Logged

Hangar : Please see my introduction.
RC India forum and me : About this forum.
 

Read
« Reply #18 on: October 22, 2009, 06:08:38 PM »
rcforall
Plane Lover
Forum Hero

*****

Reputation Power: 22 
rcforall barely matters.rcforall barely matters.
Offline Offline

City: Chennai
State: Tamil Nadu
RC Skills: Beginner
Posts: 1663
Join Date: Mar, 2009



OUR PLANE WEIGH 1.3 KG, WITH WING SPAN 1.5M, LENGTH IS 71 CM.
  CAN OUR PLANE FLY WITH PROPELLER 6*4.?

  CAN WE USE 8*4 PROPELLER ?,WITH  
CELL -YUNTONG, 30C,1000mAh, 3S
motor is cobalt 400, 11 turns. 30amp.
FOR THIS WHAT SHOULD BE THE CAPACITY OF ESC?

Sure looks flyable on a 6 x 4 as by proportions it looks like a glider

 PROVIDED :

1) the wing is designed to be a glider
2) the motor ref is right and as per specs
3) the motor does not have any internal damages  already (  I strongly suspect this ) . The reason I say this is because the motor specs clearly says 7-8 cells ( hence 8.4 ~ 9.6 V going with Nimh ) and test voltage of 8 V .
http://www.maxxprod.com/mpi/mpi-26a.html

hence in my opinion the motor should be fried by now OR at least have had some internal coil damage .

Sai
« Last Edit: October 22, 2009, 06:16:07 PM by rcforall » Logged

www.zuppa.io : vehicle telematics, ADAS, IoT , Drones
 

Read
« Reply #19 on: October 22, 2009, 06:43:21 PM »
avinash.tutu
Plane Lover
Active Member
**

Reputation Power: 1 
avinash.tutu has no influence.
Offline Offline

City: quilon
State: Kerala
RC Skills: Beginner
Posts: 41
Join Date: Oct, 2009



Thank you Sai for your information. we have checked the motor by connecting directly to the battery, and its working smoothly.
Logged
 

Read
« Reply #20 on: October 22, 2009, 07:04:48 PM »
anwar
Administrator
Forum Hero

*****

Reputation Power: 141 
anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!
Offline Offline

City: Doha (Qatar) & Thrissur
State: Kerala
RC Skills: Advanced
Posts: 11619
Join Date: Mar, 2009

RC India - Flying and racing with open minds !



So looks like what you need is a 40A (or 35A) brushed ESC that supports 3s lipos, and a 6x4 prop.
Logged

Hangar : Please see my introduction.
RC India forum and me : About this forum.
 

Read
« Reply #21 on: October 23, 2009, 04:37:27 PM »
mpsaju
Plane Lover
Senior Member

***

Reputation Power: 2 
mpsaju has no influence.
Offline Offline

City: Chennai
State: Tamil Nadu
RC Skills: Intermediate
Posts: 114
Join Date: Mar, 2009



Sorry for not getting here earlier...
Could I know what is the area of the wing,
chord length of the wing,
type of flying the model is built for ... like: trainer or mildly aerobatic or fully aerobatic, or 3D, or pylon racing etc.

Also the make of the prop (6x4 or 8x4 ?)?

Saju
Logged

Happy Flying


Saju
 

Read
« Reply #22 on: October 26, 2009, 11:10:21 AM »
anwar
Administrator
Forum Hero

*****

Reputation Power: 141 
anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!
Offline Offline

City: Doha (Qatar) & Thrissur
State: Kerala
RC Skills: Advanced
Posts: 11619
Join Date: Mar, 2009

RC India - Flying and racing with open minds !



I am, admittedly, a newbie to electrics and find that there is not much (useful) information available from most sellers of motors.

What I would like to see included is, at least a link to obtain the following information:

Wattage
KV rating
Graphs of current drain vs Voltage (2s, 3s etc) vs prop size

This would go a long way in helping us make a choice suitable  for any specific need/requirement.

These set of docs from Sai for the motors he sells should help.

http://www.rcindia.org/electric-power/full-datasheets-of-all-rcforall-motors/
Logged

Hangar : Please see my introduction.
RC India forum and me : About this forum.
 

Read
« Reply #23 on: October 26, 2009, 06:06:37 PM »
avinash.tutu
Plane Lover
Active Member
**

Reputation Power: 1 
avinash.tutu has no influence.
Offline Offline

City: quilon
State: Kerala
RC Skills: Beginner
Posts: 41
Join Date: Oct, 2009



hai saju....

its  our first plane
wing area area 170*17
length 71cm
our plane  don't have aileron
prop 8*4
we don't know in which category it falls  Head Scratching
how can we differentiate planes by seeing its structure?
Logged
 

Read
« Reply #24 on: October 26, 2009, 06:10:23 PM »
Pikle6
Plane Lover
Forum Hero

*****

Reputation Power: 13 
Pikle6 has no influence.
Offline Offline

City: Navi Mumbai
State: Maharashtra
RC Skills: Beginner
Posts: 1050
Join Date: Apr, 2009

VTOL - Vertical Take Off & Landing



seriously a pic would help   Smiley

subbu
Logged

E.V.Subramanian
Yak55|EasyFly Glider 1.9m|Skyfun|Easystar II|Quad Talon V2|Mini Saturn
 

Read
« Reply #25 on: October 31, 2009, 09:04:10 AM »
anwar
Administrator
Forum Hero

*****

Reputation Power: 141 
anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!anwar is awe-inspiring!
Offline Offline

City: Doha (Qatar) & Thrissur
State: Kerala
RC Skills: Advanced
Posts: 11619
Join Date: Mar, 2009

RC India - Flying and racing with open minds !



Yep, please post a picture of your plane !

Did you order the ESC and prop yet ?
Logged

Hangar : Please see my introduction.
RC India forum and me : About this forum.
 

Pages: 1 2 [All]   Go Up
Jump to:  

Related Topics
Subject Started by Replies Views Last post
Servo selection guidelines « 1 2  All »
Radios and Receivers
PankajC 32 24272 Last post August 25, 2009, 02:01:59 PM
by saurabhhsrivastavaa
SELECTION OF MOTORS ???
Electric Planes
TEJASCOOL007 5 4560 Last post August 19, 2009, 02:02:13 PM
by Pikle6
Engine Selection
Fuel and Engines
frozen.ice 0 3960 Last post June 26, 2016, 04:01:49 PM
by frozen.ice
Easycap utv007 Selection
Wanted
niteenk 0 957 Last post September 26, 2017, 03:28:13 PM
by niteenk
Motor Selection
Beginners Zone
aman48811 15 5616 Last post April 15, 2018, 09:49:56 PM
by aman48811