Shopping Cart
Shop Now...
R/C Hobby Products
Additional Hobby Products
Shop by Brand Easy Pay Shop for Parts
New Items
Special Sales
  Electric Motors, Engines & Accessories > Motor & Accessories - R/C Aircraft > Motors R/C - Brushless - Aircraft [View Top Sellers for this Category] Bookmark this Page

O.S. - OSMG9530 OSM51012004 51012004 531028500068 4531028500068
Manufacturer Stock#
A Closer Look at This Product
  Tech Notes

Possible Substitutions

Replacement & Optional Parts

Browse O.S.

Manufacturer's Product Web Page

O.S. .30 Brushless Outrunner Motor 3825-750
Click for parts for this item
O.S. .30 Brushless Outrunner Motor 3825-750
View Larger Picture

Instruction Manuals: Manual 1 (1.9 MB)
Tower Catalog Page: 77

Stock Number
Stock Status
Possible Substitutions

Tech Notes
         This is the .30 Brushless Electric Motor from O.S. Motors.

FEATURES: For .25 - .30 size airplanes Centrifugal fan design with angled ventilation holes draws air through the motor and across the windings and magnets for improved cooling

INCLUDES: .30 Brushless Electric Motor with Backplate, four Phillips Head Mounting Screws, 3mm Gold Plated Male Plugs attached to leads, three 3mm Female Plugs with Shrink Wrap, Prop Adapter and Instruction Sheet

REQUIRES: 60A brushless ESC

SPECS: Rated Power: 590W Rated Voltage: 14.8 - 18.5V Rated Current: 35 - 40A Maximum Current (10 sec): 75A No Load Current: 2.0A Phase Resistance: 31. miliohms Maximum Efficiency: 85% kV: 750 Poles: 14 Shaft Diameter: 0.20" (5mm) Shaft Length: 0.45" (11.5mm) Weight: 6.7oz (190g) Lead Wire Length: 3.5" (90mm) Length of Motor Can: 1.9" (48.3mm) Diameter of Motor Can: 1.47" (37.5mm) Length/rear of Motor Can to Prop Washer: 2.5" (63mm) Prop Washer Diameter: 0.87" (22mm) Thickness of Motor Mount: 0.12" (3mm) Width of Motor Mount: 1.96" (50mm) Height of Motor Mount: 1.96" (50mm)

Performance for this motor with different props and LiPo cells is as follows (all data with 60A ESC): Prop Size Max Electric Current LiPo Cells 12 x 8E 37A 4S 13 x 8E 43A 4S 14 x 7E 46A 4S 14 x 7E 30A 3S

COMMENTS: Nomenclature is defined as follows: 0MA means 0.S. airplane motor First two digits are the rotor diameter Second two digits are the length of the magnets Last digits indicate the kV of the motor

jxs 05/11/11 ir/jxs

– If you need more information, use these O.S. resources –
Click Here: Manufacturer's Product Web Page
Web Site:
Phone: 217-398-8970
  Postal Address:

Click here for Units of Measure Conversion Calculators

Tower Hobbies Has Been Serving Hobbyists Since 1971   •   Call 800-637-6050 or 217-398-3636
BizRate Customer Certified (GOLD) Site Shop Now Using PayPal
We accept the following:

Unauthorized use of any materials presented here is prohibited. Copying or reproducing any elements from this page is not permitted. All prices, descriptions and availability subject to change. Displayed within some areas of our web site, the Retail Price is suggested by the manufacturer or supplier, or estimated in keeping with standard industry practice. It may not represent the prevailing price in your area or a price that Tower Hobbies has ever offered for the item.
Follow Tower Hobbies On