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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.
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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
4.5 ★★★★★
Based on 11 reviews
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Product Reviews
★★★★★ 4
Good quality pillows overall
Size: King (Pack of 2), Color: White
Got a set of these for my wife and myself as we were struggling with our old pillows. These have some really good qualities and some things we'd like to see changed.
First, the good: These are look and feel like they are high quality and made with good materials. The foam itself has a very nice feel to it. We love the fact they are adjustable to add or remove foam. They come with a pretty substantial amount already in the pillow. We appreciate the CertiPur certification.
Now the improvements or changes we'd like to see: The foam, while feeling great, doesn't bounce back well if you scrunch your pillows, and so every day you have to fluff and reshape the pillow, moreso than some other memory foam pillows we've owned. One side of the pillow is cooled and you can feel that even through the pillow case, and that's a great thing. However, one side is not cooled and we'd have preferred if both sides were made of the cooling material.
Overall, these are good pillows and we are not disappointed with the purchase. They are not, however, our perfect pillows (which do seem hard to find), and at some point in the future will probably make their way to the guest bedroom. We would rate them as some of the better pillows we've tried and feel most people would probably like them.
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Reviewed in the United States on December 19, 2025
★★★★★ 5
Perfect Pillow
Size: Queen (Pack of 1), Color: White
These are the best pillows ever. You can adjust the firmness or softness to whatever you want. For years i used a soft latex pillow , which you cant get anymore. I will never use another pillow. I have purchased 6 of these after the first one. You pick your own comfort level. Best ever. No more neck aches.
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Reviewed in the United States on May 17, 2026
★★★★★ 5
Hallelujah… finally, I found the right pillow!!!
Size: Queen (Pack of 1), Color: White
I have spent a lot of money searching for the right pillow. I recently tried to Tempur-pedic that cost twice with this pillow cost. Tempur-pedic flattened out. I’ve had this pill for a few weeks now and it works wonders. I am a paraplegic. You can have a lot of neck problems. I love the fact that this pillow is adjustable. I immediately saw it was too stuffy and took a bunch out. It works perfect so glad I didn’t spend money on a $200 purple pillow.
I read a lot of reviews and there were a lot of complaints about the odor. Mine did smell funny when it came out of the box. I immediately threw it in the dryer with a few bounce fabric sheets came out smelling fine.
Pillows are a very individual thing, but I think for 40 bucks this pillow is worth a try. I’m really enjoying mine about one of those silk pillowcases to go over it and it sleeps cool and comfortable. Best wishes in your search for the right pillow.
Update: I’ve been using this pillow several months and it continues. Give me a good night rest pain-free.. well worth the money.
UPDATE: I have been using this pillow for three months and it still works great. It does not flat out or get hot..
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Reviewed in the United States on January 29, 2026
★★★★★ 5
Soft comfortable very good pillow
Size: King (Pack of 1), Color: White
I really love my new pillow it's great and comfortable. Yes, it has a little smell, but if you wash the pillowcase and put the pillow on the window for a day you won't notice anything anymore.
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Reviewed in the United States on May 18, 2026
★★★★★ 5
Best place for head
Size: Queen (Pack of 1), Color: White
Do you love not getting sleep and sweating all over your pillow at night when you are asleep? If so then don't buy this pillow! If you want a good nights sleep and cool pillow like me this is the one. Ive always been ehh towards spending so much on a pillow but its 100% worth it, I sleep so much better and it forms to my head and keeps me cool at night. Great support even for my big head and comes with a bag of extra stuffing if you want to have a little more firmer pillow. Highly recommend
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Reviewed in the United States on April 4, 2026