Go Back  RCU Forums > Electric Aircraft Universe > Ask the Expert Sal - Electric Airplane Advice
 Help with conversions, motor and battery selection >

Help with conversions, motor and battery selection

Notices
Ask the Expert Sal - Electric Airplane Advice Here is your chance to ASK SAL, the expert for all your electric flight related questions. If you are not Sal, please do not answer questions in this forum.

Help with conversions, motor and battery selection

Old 03-30-2007, 10:48 AM
  #1  
Senior Member
Thread Starter
 
Join Date: Aug 2002
Location: Williston, VT,
Posts: 218
Likes: 0
Received 0 Likes on 0 Posts
Default Help with conversions, motor and battery selection

I love helping you guys do conversions or upgrades for your aircraft!
It is helpful to supply this information:

Aircraft:
Type (airplane, sailplane, twin, parkflyer, etc)
Estimated flying weight
wingspan
wingarea
If it's an aircraft, largest prop that can be used for ground clearance

I can give you a motor system recomendation with this info. I will be able to supply the info for the motor, esc, prop, and battery. I will be able to give you estimated, thrust, prop speed and amp draw.

If you are planning to use a certain motor and want to know how it will work. I will need:
Motor
Kv (rpm per volt)
Io (idle Amps)
Resistance (Mohms)

I you don't know or cannot figure what these things are, point me to a website that has the info. If I am familiar or carry the motor, I will already have this info.
With this info I can supply the battery, prop with performance figures as above.

If you want to know if your battery will work in an already existing aircraft of conversion, I will need"

The above info of the aircraft and motor
battery make and when purchased (approx)
capacity
number cells (series,only)
output (8c, 10c, 12c, 15c, 20c 25c, etc)

With this I can give you all performance fugures as above.


If you are not sure what you need, please feel free to start a thread and give me the info you do have. I will then ask questions to help us both figure it out!
Old 03-30-2007, 01:41 PM
  #2  
 
Join Date: Feb 2005
Location: Wallkill, NY
Posts: 596
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Help with conversions, motor and battery selection

Sal, what can I do with this brushless motor?

Designation: 1208425L
Turns: 25
Max Amps: 5.5
Resistence: 0.3160
RPM/V: 5866
IO(A): 0.6
Shaft Size: 1.5mm Diameter / 6mm Length
Weight: 17 grams / 0.60 oz.
Dimensions: 12 mm Diameter x 31mm Long

Prefer some sort of airplane idea.

Also, still waiting on any ideas for my GWS C 47 conversion.
Thanks.
Rick
Old 04-01-2007, 01:04 PM
  #3  
Senior Member
Thread Starter
 
Join Date: Aug 2002
Location: Williston, VT,
Posts: 218
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Help with conversions, motor and battery selection

Even without doing the numbers, I can tell you just from the Kv which is 5866, that you either use if for ducted fan use or put a gearbox on it. This is a very small motor and for airplane use would be best with a geardrive. What would you like to do?
Old 04-07-2007, 03:30 PM
  #4  
Senior Member
 
KingCobra2's Avatar
 
Join Date: Dec 2006
Location: Palm Coast, FL
Posts: 600
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Help with conversions, motor and battery selection

[X(]


ORIGINAL: salnsp
What would you like to do?
Old 04-07-2007, 03:36 PM
  #5  
Senior Member
 
KingCobra2's Avatar
 
Join Date: Dec 2006
Location: Palm Coast, FL
Posts: 600
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Help with conversions, motor and battery selection

You want to know all there is to know about anything RC ELECTRIC>> Come see us at www.wattflyer.com . We are also a part of RC Universe, only DEDICATED electrics!!!!!!!!! Airplane or Heli ONLY.Any qustions and FAST answers! See ya there!


ORIGINAL: ElectricFlyGuy

He would like to know what airplane or airplanes best match that motor.[X(]
ORIGINAL: salnsp

Even without doing the numbers, I can tell you just from the Kv which is 5866, that you either use if for ducted fan use or put a gearbox on it. This is a very small motor and for airplane use would be best with a geardrive. What would you like to do?
Old 04-08-2007, 01:01 AM
  #6  
Junior Member
 
Join Date: Apr 2007
Location: Scottsdale, AZ
Posts: 2
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Help with conversions, motor and battery selection

I'm working a scratch T-28 . Wing Span 48", Wing Area 385 sq in
Weight 50 oz, Could handle about a 12 to 14 inch prop, based on estimated ground clearance
I have a FUTABA 6ex-pcm Transmitter and the receiver and servos that came with it

What do you recommend and where can I buy the following:
Motor:
Prop (prefer 3 blades):
ESP:
Battery(Prefer Li-Poly):
Battery Charger:

Thanks for your help

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
Trackbacks are Off
Pingbacks are Off
Refbacks are On


Thread Tools
Search this Thread

Contact Us - Manage Preferences Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.