Glow to Electric Conversions Discuss glow/gas conversion to electric here.

Recommendations for motors for this twin

Reply

Old 11-28-2013, 09:04 AM
  #1  
oldbassard
Senior Member
Thread Starter
 
Join Date: Aug 2012
Location: Kiefer, OK
Posts: 232
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Recommendations for motors for this twin

Hey Gang

I am building a Cessna T-50 Bobcat in 1/8 scale (The plans say 1/8, I think it's more like 1/12) At any rate the plans say the plane finished will weigh 8-10 lbs. It recommends a set of 40-45 nitro engines (recommendations from 1964) At any rate I want to make it electric and I am somewhat confused while trying to learn about the motor sizes. I do know I need two esc's. I am new to electronic flight so I'd appreciate any advise on what motors I need also a little info about the brands would be good.
oldbassard is offline  
Reply With Quote
Old 01-06-2014, 11:43 AM
  #2  
aeajr
My Feedback: (2)
 
aeajr's Avatar
 
Join Date: Jan 2003
Location: Long Island, NY
Posts: 8,567
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

EVERYTHING YOU WANTED TO KNOW ABOUT ELECTRIC POWERED FLIGHT
http://www.rcuniverse.com/forum/m_7100376/tm.htm

First you want to take a look at the e-book at this link for general information.

What sort of performance are you looking for?

I would target about 400 to 500 watts/motor based on 8-10 pounds.

What size props are you looking to turn?


aeajr is offline  
Reply With Quote
Old 01-06-2014, 11:59 AM
  #3  
oldbassard
Senior Member
Thread Starter
 
Join Date: Aug 2012
Location: Kiefer, OK
Posts: 232
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

The plans call for 10X6 propellers. I have been reading and trying to learn a little bit more about these motors, I agree with your recommendation. Thanks
oldbassard is offline  
Reply With Quote
Old 01-06-2014, 12:27 PM
  #4  
aeajr
My Feedback: (2)
 
aeajr's Avatar
 
Join Date: Jan 2003
Location: Long Island, NY
Posts: 8,567
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

how much room do you have inside the motor housings? Outrunners have a spinning outer can which can not be allowed to touch the walls.

In runners do not but may require a gearbox for your application. Not sure yet.
aeajr is offline  
Reply With Quote
Old 01-06-2014, 12:35 PM
  #5  
aeajr
My Feedback: (2)
 
aeajr's Avatar
 
Join Date: Jan 2003
Location: Long Island, NY
Posts: 8,567
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

OK so here is one way to approach this. We use a calculator. There are a variety but I am going to provide a link to the one for ElectriFly
http://www.electrifly.com/powersyste...tem-index.html

You will see they have a variety of options. Look around. explore!

Now, if you are doing this for a twin engine then you put in 1/2 the weight for the calculation as it does not do "twins". But logically each motor carries half the load.

Take a look here: http://www.electrifly.com/config/

Select Rimfire for an outrunner and go from there. See what you get as you change the type of plane or pick different battery pack sizes..

Note on the bottom of the page where it shows you the motors that there is a button to see what you might select in AMMO motors. These are the inrunners. Note that they sometimes need a gearbox.


Look at the model number of the motors they recommend. www.towerhobbies.com sells these motors so just search on the model number they give you and the motor should come up.

Last edited by aeajr; 01-06-2014 at 12:44 PM.
aeajr is offline  
Reply With Quote
Old 01-06-2014, 04:20 PM
  #6  
oldbassard
Senior Member
Thread Starter
 
Join Date: Aug 2012
Location: Kiefer, OK
Posts: 232
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Hey thanks I will have a look
oldbassard is offline  
Reply With Quote
Old 01-11-2014, 02:10 PM
  #7  
Dr Kiwi
Senior Member
 
Join Date: Dec 2002
Location: Chattanooga, TN
Posts: 2,198
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

What would be the largest props you can fit to the airframe... you'll get more thrust from 12" or so than from the 10" to which the nitro engines may have been limited.
Dr Kiwi is offline  
Reply With Quote

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service