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Description
Boom Racing 3S Muscle Winch™ High Voltage Direct Power 40KG Waterproof Servo Winch w/ Free Spool UnitPRODUCT RESOURCES Instruction Manual Muscle Winch 3S BR 40SW 3S_1653753680. Jpg 430. 51 KB TAGGED CATEGORIES: WINCHES PRODUCT INFORMATION: Boom Racing's Muscle Winch is a dedicated and fully waterproofed internal servo winch designed and engineered from the ground up, delivering strong pulling power and reliable performance for any R C builds. Free Spool Unit A dual trigger free spool unit is integrated into the Muscle Winch for quick winch release.
PRODUCT RESOURCES
TAGGED CATEGORIES:
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Boom Racing's Muscle Winch™ is a dedicated and fully waterproofed internal servo winch designed and engineered from the ground up, delivering strong pulling power and reliable performance for any R/C builds.
Free Spool Unit
A dual-trigger free-spool unit is integrated into the Muscle Winch™ for quick winch release. There are two ways to trigger the free spool mechanism; one by pressing the button on top of the servo winch, and the other by pulling the knob on the bottom. This dual-trigger design makes the free-spool unit accessible from both sides of the servo winch, which is a major advantage when designing the layout of your servo winch placement.
To release the rope, press the button on top of the Muscle Winch™ or pull the knob from the bottom. This will disengage the locking mechanism allowing you to pull the rope out. Once you have reached the desired length, then release either the button or knob and continue pulling on the rope until you hear a “click” sound. The locking mechanism will re-engage and you are ready to winch.
The Muscle Winch can also be used without the free spool. You can use the radio to release the cable.
The Muscle Winch™ operates at up to 12.6V which produces up to 40KG (555oz) of torque and features a billet aluminum case and full metal gears for strength and durability. A metal scale winch hook is included for the icing on the cake!
Requires a spare channel with a three-position switch to control the winch.
Specification:
- Integrated Free Spool Unit
- Battery: 2-3S Lipo
- Operates at up to 12.6V
- Torque: 28kg/cm (389oz/in) @ 8.4V and 40kg/cm (555oz/in) @ 12V
- Operating Speed: 83RPM @ 8.4V and 118RPM @12V
- Fully Waterproof IP67
- Full metal case
- Full metal gears
- Metal hook included
- Nylon winch line 68kg (2 meters) included
- Size: 54mm x 46.5mm x 20mm
- Weight: 88.5g
Includes:
- Muscle Winch with Free Spool Unit
- Nylon winch line (2m)
- Metal Hook
- Decal sheet
- Instruction Manual
Optional accessories:
- Switch Button (2pcs) #BR-36Switch
- Easy Access Knob #BR-36Knob
- Universal Routing Kit #BR-36Route
- 220 Fast Gear Set #BR-36Gear
- Servo Winch Mount Kit for BRX01 #BRLC7200
Replacement:
- Nylon Winch Line 2.5m & Metal Hook #BRSW36-RS3
- Nylon Winch Line 2.5m (2) #BR-36Line
- Waterproof Silicone Seal (2) #BR-36Seal
- Stainless Steel Barrel #BR-36Barrel
Warranty: This product is covered by Boom Racing factory warranty. All electronic products are guaranteed defect-free. Please refer to the warranty information from the manufacturer.
Additional Notes: If the Winch does not properly work as intended, when using the following radio systems, some setup is known to work:
*To avoid damaging the Muscle Winch, remove the hook from the rope if it is already attached before setting up the radio.
Caution:
The battery must be disconnected from the ESC (if ESC has a power switch) and Muscle Winch when not in use to prevent damage to the winch and battery. Do not connect the winch directly to the battery balance port. Damages caused by the above action(s) will void the warranty.
Futaba 7PX/7PXR radio:
- 1) Be sure to use the correct System Mode corresponding to the receiver according to the 7PXR user manual. [ Setup location: Home > Menu > Linkage > Receiver ]
- 2) Turn off Channel 3 connection from the DT3 button. Turn on Channel 3 connection from the DT6 button on the radio which provides a three-position switch function. Then increase the DT6’s “Step” to 100. [ Setup location: Home > User Menu > Fifth page > Trim / Dial select ]
- 3) Activate the Muscle Winch by pushing the DT6 button after the electronics are connected. The winch spool will start rotating and might judder. Adjust the Left and Right endpoints, in values 100 or above, to get rid of the juddering in both rotational directions. [ Setup location: Home > User Menu > First page > End point > Channel 3 ]
Fly Sky Noble NB-4 radio:
- 1) Go into settings on the first page and select Assign.
- 2) Select TR1-FB as a button for your winch control.
- 3) On that screen for Type, select 3 POS, TR1-FB select CH3, and TR1-FB select REV.
- 4) Once you are done with steps 1-3 go back to the main menu and select RX SET.
- 5) Select Servo Frequency.
- 6) Two options here, either select Analog or Digital servo. If selecting Analog, the setup is complete.
If you want to use Digital, go on Custom set to 250Hz and the setup is complete.
Sanwa M12RS radio:
- Set to modulation FH3E
- Winch channel set to NOR
- New Bind
- Color: Black
- Package total weight: 140.00 grams (incl. packaging)
- Package size: 8.00 x 11.00 x 4.00cm
- Factory description: Boom Racing 3S Muscle Winch™ High Voltage Direct Power 40KG Waterproof Servo Winch w/ Free Spool Unit
- Manufactured by Boom Racing
- Manufacturer number: BR-40SW-3S
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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Product Reviews
★★★★★ 5
Stylish and comfy
Size: 7.5, Color: Brown
Super cute and comfy sandals! I love that they are adjustable.
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Reviewed in the United States on May 26, 2026
★★★★★ 5
Great option for a great price
Size: 7.5, Color: Black
I love these sandals. They are well made, true to size and soft suede. They are lightweight and feel just like my UGG goldenstar sandals. (These are not as adjustable, so if you have narrow or wide feet, these may not be for you) These a great value for the money, especially for medium width feet. The strap across the toe is not adjustable, but fit my feet just fine. The ankle strap was a good length for me. And the Velcro is strong. These sandals are a great value for the money. I will probably start looking into kookaburra before I rush to buy the more expensive ones now.
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Reviewed in the United States on May 5, 2026
★★★★★ 5
Quality, good looking shoes!
Size: 8.5, Color: Green
Absolutely perfect fit, design, and color. I'm so pleased with these sandals and as always with this brand, I am not in anyway disappointed. These shoes are so comfortable right out of the box. They clean up very nicely, and last forever. I am so glad I got these before they were sold out.
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Reviewed in the United States on April 30, 2026
★★★★★ 5
UGG Comfort Without the Premium Price
Size: 9, Color: Beige, Size: 9, Color: Beige
These sandals are super cute and incredibly comfortable. They have that classic UGG look and feel, but at a much more approachable price point.
The footbed is cushioned and supportive, making them easy to wear for extended periods. The straps feel secure without rubbing, and the overall construction feels solid and well made. They’re lightweight but still have a sturdy sole with good traction.
They pair effortlessly with casual outfits and have that relaxed, elevated vibe UGG is known for—just without the higher price tag. A great value for both style and comfort.
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Reviewed in the United States on February 20, 2026
★★★★★ 5
Ugg comfy shoes
Size: 7, Color: Black
So comfortable and cute as well. I wore these the first time and had to have everyone touch them to see how the sole would squish. Fit well, and are lightweight as well.
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Reviewed in the United States on April 26, 2026
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