electric motor drawing too much current? - Page 2 - RCCanada - Canada Radio Controlled Hobby Forum
RCCanada - Canada's Radio Control Hobby Forum
Electric Flight Discuss Electric Flight in Canada

Thread Tools Display Modes
Old 03-04-2012, 11:17 AM   #11
RCC Noob
I am: Heath L
Join Date: Nov 2011
Location: BC
Radio of choice:
# of RCs: 2

Feedback: 0 / 0%
Posts: 23
Total Props: 0
Re: electric motor drawing too much current?

       Remove this ad - become a site supporter!
Originally Posted by dirtdr View Post
by using the calculator here:


you can get a pretty good idea of what to do before spending $$ on props/batteries/ etc.

I plugged in the info you provided and came up with this:

with 11x8 you would be drawing approx 56 amps at full throttle

by changing to 11x6, you would be pulling 46 amps. 600watt and have about 6 lbs of thrust. 11,500rpm!!
That's great, thanks a lot. this site will come in very handy.
thanks for all the help guys,
wildernessbob is offline   Quick reply to this message.

Sponsored Links - Subscribe to remove this ad.
Old 03-14-2012, 05:54 PM   #12
RCC Supreme Contributor
I am: Len S
Join Date: Mar 2009
Location: Kelowna
Radio of choice:
Jeti DS16 just need one radio as it does it all but still use my Airtronics SD10.
# of RCs: 10

Feedback: 23 / 100%
Posts: 2,545
Total Props: 16
Re: electric motor drawing too much current?

Originally Posted by wildernessbob View Post
it's a 1000Kv 670w 45 amp outrunner with an 11x8 prop, 55 amp trust sbec running on 4s li-po.
Been doing that electric stuff for a while and appears that the higher kv motor with 4S will never agree with a 11x8 prop as it will want to spin it at over 14,000 rpm ( battery voltage X 1000kv). No mention on prop brand but I would drop the prop down to an APC 11x6E or even better ...a 11x5E prop . Also no mention if you are using an electric or fuel prop . The non electric prop takes extra power just to turn because of weight/inertia. Or as mentioned drop to a 3S pack and get the rpms down and it will draw less current. IMO.

Also as a rule of thumb run , it is good idea to run your system at 80% of full rated power ( ESC + Motor ) Oh and forgot one more thing to help the helpers......best to give motor, make and model, ESC make and model , Prop make and size and batteries ... number of cells, capacity and C rating then we have all we need. The more information the better. Hope everyone's suggestions help out.

Last edited by stegl; 03-14-2012 at 06:01 PM.
stegl is offline   Quick reply to this message.

Quick Reply

Register Now

In order to be able to post messages on the RCCanada - Canada Radio Controlled Hobby Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

Member names may only be composed of alpha-numeric characters. (A-Z and 0-9)

!!ATTENTION ADVERTISERS!! If you intend on advertising anything on this forum, whatsoever, you are required to first contact us here . Additionally, we do NOT allow BUSINESS NAMES unless you are an Authorized Vendor. If you own a business, and want to do sales on this site via posting or private message, you will need to follow the rules. Shops, Stores, Distributors, Group Buys without being authorized will see your account terminated.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Your Name
Your first name and last initial is required if you plan on using the forum.
Which city & province you live in. This is mandatory for classified listings.
Radio of choice?
Which radio is your current favorite to use?
Number of RC Vehicles?
How many boats, cars, planes do you own?


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
vBulletin Message

Thread Tools
Display Modes

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Drawing on Ultracote dean2287 Construction Ideas, Hints and Tips 6 02-19-2011 06:02 PM
Drawing Table f4u FS - Other RC 3 04-05-2010 05:57 PM
Motor-prop cmbo current draw expectations & minifuntana Claude Paradis Electric Flight 7 03-13-2006 12:05 PM
Drawing Programs scaleguy Scale Aircraft 17 02-28-2006 07:00 AM
Drawing downloads Derrick General RC Heli Discussion 2 01-20-2003 03:14 PM

All times are GMT -5. The time now is 02:26 PM.

vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.