50cc equivelent electric motors? - RC Groups
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Mar 20, 2012, 08:13 PM
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TMAC4123's Avatar
Question

50cc equivelent electric motors?


Hey guys im looking for a electric motor thats the same size as a 50cc motor, meaning same power. Thanks!
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Mar 20, 2012, 08:19 PM
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fu-corsair's Avatar
Looking to buy or what to buy?
Mar 20, 2012, 08:23 PM
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fu-corsair's Avatar
The list is a long one, my favorites are Hacker A80's or A60L then there are the new Axi 5345HD's and my ultimate favorite the Plettenberg Terminator 30-8. NEU are also good choices.
Last edited by fu-corsair; Mar 20, 2012 at 08:42 PM.
Mar 20, 2012, 08:26 PM
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imyohero's Avatar
cc doesnt =hp output, how many hp from a 50cc size/weight motor do you need the elec counterpart to match or exceed?
Mar 20, 2012, 08:27 PM
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TMAC4123's Avatar
I need a motor that will fit in a 72" EDGE. what should i use?
Mar 20, 2012, 08:28 PM
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fu-corsair's Avatar
I don't know about the calculations but most of the motors listed below will out perform any 50cc size gas motor.
Last edited by fu-corsair; Mar 20, 2012 at 08:42 PM.
Mar 20, 2012, 08:39 PM
Registered User
fu-corsair's Avatar
Quote:
Originally Posted by TMAC4123
I need a motor that will fit in a 72" EDGE. what should i use?
Who makes your Edge and 72" isn't 50cc size
Mar 20, 2012, 08:46 PM
Registered User
fu-corsair's Avatar
Quote:
Originally Posted by TMAC4123
I need a motor that will fit in a 72" EDGE. what should i use?
I'd use either the Hacker A60 or the NEU 1515G HD
Mar 21, 2012, 08:37 AM
homo ludens modellisticus
Ron van Sommeren's Avatar
Forget number of cc's, airplane weight is the key factor.

* Choosing a power setup
Magic numbers for modelers... - WFF
How to choose a power system - RCG
Beginners Guide to Motor and Prop Selection - RCG

* About de-rating!!! controllers and motors, starting at 'for everyone else':
Scorpion Motors: Questions and Answers.... - Page 290 - RC Groups

http://www.theampeer.org/sitetoc.html
-> Glow to Electric Power System Conversion

Two follow ups to the above by Ken Myers:
http://www.theampeer.org/ampeer/ampn...nov11.htm#GLOW
http://www.theampeer.org/ampeer/ampd...ec11.htm#SHEET


Vriendelijke groeten Ron
diy motor tipsDrive Calculator
diy motor groupCumulus MFC
• Get a life ... get a Watt-meter! •
Last edited by Ron van Sommeren; Mar 28, 2012 at 09:51 AM.
Mar 21, 2012, 11:40 AM
Registered User
fu-corsair's Avatar
Quote:
Originally Posted by Ron van Sommeren
Forget number of cc's, airplane weight is the key factor.

* Choosing a power setup
Magic numbers for modelers... - WFF
How to choose a power system - RCG
Beginners Guide to Motor and Prop Selection - RCG

* About de-rating!!! controllers and motors, starting at 'for everyone else':
Scorpion Motors: Questions and Answers.... - Page 290 - RC Groups

http://www.theampeer.org/sitetoc.html
-> Glow to Electric Power System Conversion

Two follow ups to the above by Ken Myers:
http://www.theampeer.org/ampeer/ampn...nov11.htm#GLOW
http://www.theampeer.org/ampeer/ampd...ec11.htm#SHEET


Vriendelijke groeten Ron
diy motor tips Drive Calculator
diy motor group Cumulus MFC
Get a life, get a Watt-meter!


Thanks Ron, I now have this copied forever.
Mar 21, 2012, 11:59 AM
homo ludens modellisticus
Ron van Sommeren's Avatar
And then there's the calculators:
http://rcadvisor.com/
http://flbeagle.rchomepage.com
www.drivecalc.de (Eng/German, Win/Lin/Mac)
and Louis Fourdan's ScorpionCalc
https://www.rcgroups.com/forums/showthread.php?t=736782

More e-flight calculators in the sticky in this subforum.
However, keep this in mind, as with all software: garbage in, garbage out.
Don't expect a good result by blindly entering numbers. And even good result is just a ball park figure.


Vriendelijke groeten Ron
diy motor tipsDrive Calculator
diy motor groupCumulus MFC
• Get a life ... get a Watt-meter!!! •
Last edited by Ron van Sommeren; Mar 21, 2012 at 09:00 PM.
Mar 21, 2012, 12:32 PM
Bart
Don't go for super strength, go for super light

Here my setup for a 78" Sbart SU 29S, final weight including Lipo < 4 kg that is ~ 1.2 kg or more lighter then almost all the other planes in this size.

- Hyperion HS4035-400Kv ( 435 gram)
- Jeti spin opto 99
- Gens ACE 6s 5300 mAh 30C
- Xoar 20x9 PJN ( use a prop adapter from scorpion 8mm shaft of the hyperion )
- 4 x HS7950TH
- CC BEC pro at 7.5 Volt

it runs now on 12 degrees timing and it puls max 115A, engine and ESC are cool after flight.

Bart,
Mar 21, 2012, 01:36 PM
Suspended Account
Here is a (claimed) 50cc outrunner:

http://www.hobbyking.com/hobbyking/s...ner_Motor.html

To me the problem is not the motor as much as batteries. The batteries are heavy and you can only get short flight times without a huge weight increase.

When you get to this size model gasoline or glow engines become a more attractive power source. Gasoline/glow fuel has more energy for a given volume than the batteries needed to fly. You have lower fuel weight/volume and much longer flight time with gasoline or glow fuel. That equals a lighter plane with more power.
Last edited by buracho topspin; Mar 21, 2012 at 01:41 PM.
Mar 21, 2012, 01:56 PM
Registered User
fu-corsair's Avatar
Quote:
Originally Posted by dirtyballs
Don't go for super strength, go for super light

Here my setup for a 78" Sbart SU 29S, final weight including Lipo < 4 kg that is ~ 1.2 kg or more lighter then almost all the other planes in this size.

- Hyperion HS4035-400Kv ( 435 gram)
- Jeti spin opto 99
- Gens ACE 6s 5300 mAh 30C
- Xoar 20x9 PJN ( use a prop adapter from scorpion 8mm shaft of the hyperion )
- 4 x HS7950TH
- CC BEC pro at 7.5 Volt

it runs now on 12 degrees timing and it puls max 115A, engine and ESC are cool after flight.

Bart,

I agree Bart, less weight is the ticket to a nice flying electric.
Mar 21, 2012, 05:17 PM
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imyohero's Avatar
Lots of good info guys!

I just dislike seeing the cc of a gasser displayed like it has everything to do with power output, it doesnt, its just part of it.


Good luck on your plane hope you get it flying the way you want!


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