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. - OSMG9526 OSM51011101 51011101 531028500273 4531028500273
Manufacturer Stock#
A Closer Look at This Product
  Tech Notes

Replacement & Optional Parts

Other Items of Interest

Browse O.S.

Manufacturer's Product Web Page

O.S. .25 Brushless Motor 3820-960
Click for parts for this item
Easy Pay Eligible: Yours for 2 Easy Pay payments of $39.99
Select Easy Pay Plan during checkout.

O.S. .25 Brushless Motor 3820-960
View Larger Picture

Instruction Manuals: Manual 1 (1.9 MB)
Parts Saver Eligible:Yes
Tower Catalog Page: 77

Stock Number
Retail Price
Tower's Low Price
Stock Status
In Stock
Buy Now
Add to wish list
—— Share ——
Share on Twitter
Share on Pinterest Email This Page To A Friend

Quantity Discount
  Special Savings When Buying in Quantities
Special Stock Number Units at this Price Tower's Low Price Click to Order Quantity Discount Savings
O.S. .25 Brushless Motor 3820-960 Add to Wish List
152.76  Buy Now 7.20  
O.S. .25 Brushless Motor 3820-960 Add to Wish List
227.94  Buy Now 12.00  
O.S. .25 Brushless Motor 3820-960 Add to Wish List
453.54  Buy Now 26.34  

Other Items of Interest
Move your mouse over the listed items for pictures. Click any item for product details and to check compatibility.
Customers who purchased the above product also bought:
1.  LXBYTW O.S. OCA-150 50Amp 25V ESC 82.98  Buy Now
2.  LXBYTZ O.S. OCA-170HV 70Amp 50V ESC 72.41  Buy Now
3.  LXFGW7 APC 13x6.5 Electric Propeller 4.19  Buy Now
4.  LWE125 Castle Creations Phoenix Edge Lite 100 34V 100A ESC 118.98  Buy Now
5.  LWE126 Castle Creations Phoenix Edge Lite 75 34V 75A ESC w/5A 101.98  Buy Now
6.  LXUTB2 Castle Creations Thunderbird 54 50.99  Buy Now
7.  LXCYNG Castle Creations Talon 90 ESC 90A 25.2V 76.99  Buy Now
8.  LXD943 Dubro Nylon Hinges Small (15) 4.19  Buy Now
9.  LXK059 Great Planes Solid Wire Pushrod 36" (2) 5.49  Buy Now
10.  LXCNVR O.S. .52 Brushless Motor 5010-810   104.98  Buy Now
11.  LXBHER O.S. .40 Brushless Outrunner Motor 5020-490   109.98  Buy Now
12.  LXBHES O.S. .50 Brushless Outrunner Motor 5025-375   109.98  Buy Now
Product Image

Tech Notes
        This is the .25 Brushless Electric Motor from O.S. Motors.

FEATURES: For .20 - .25 size airplanes Stainless steel prop shaft Rigid rear mounting design Centrifugal fan design with angled ventilation holes draws air through the motor and across the windings and magnets for improved cooling Two year limited warranty through Hobby Services beginning at date of purchase

INCLUDES: .25 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 Voltage: 11.1 Rated Current: 40A Maximum Current (10 sec): 80A No Load Current: 1.7A Phase Resistance: 26.7 miliohms Maximum Efficiency: 80% kV: 960 Turns: 12 Poles: 14 Shaft Diameter: 0.20" (5mm) Shaft Length: 0.45" (11.5mm) Weight: 5.64oz (160g) Lead Wire Length: 3.5" (90mm) Lead Wire Gauge: 17AWG Length of Motor Can: 1.7" (43.3mm) Diameter of Motor Can: 1.47" (37.5mm) Length/rear of Motor Can to Prop Washer: 2.3" (58mm) 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 Current LiPo Cells Wattage Thrust RPM 11x5.5E 31A 3S 391W 1.9kg 10,100 11x7E 37A 3S 466W 2.1kg 9,750 11x8.5E 44A 3S 554W 2.1kg 9,350 11x10E 49A 3S 617W 2.0kg 9,100 11x4.7SF 44A 3S 554W 2.2kg 9,400 11x7SF 59A 3S 743W 2.7kg 8,540 12x6E 40A 3S 504W 2.4kg 9,650 12x6SF 66A 3S 832W 2.4kg 8,280 12x8E 49A 3S 617W 2.5kg 9,170 12x10E 66A 3S 832W 2.0kg 8,050 13x6.5E 50A 3S 630W 2.8kg 9,040 13x8E 56A 3S 706W 2.9kg 8,730 13x10E 65A 3S 819W 2.7kg 8,120 14x7E 61A 3S 769W 3.1kg 8,520 14x10E 75A 3S 945W 2.9kg 7,600

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 10/31/12 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