JCZK 300C PRO 12CH RC Helicopter FAQ

1.Will unbalanced helicopter blades cause shaking during takeoff or rotation?

At the beginning of startup, the propellers and the motor have different rotation coupling, so they will definitely shake a few times. After the running-in is completed, you can see that the propellers rotate very stably. It is not unbalanced.

 

2.JCZK 300C PRO's vulnerability and landing stability

Alloy material is stronger than other aircraft, but it is inevitable that the aircraft will be damaged due to operation. Violent operation will damage any material.

 

3.What are the advantages of JCZK 300C

Unmatched Realism:
Precision-crafted cockpit with opening doors, scaled instrument panels, and functional rudders.
High-quality alloy construction with anodized and sandblasted finishes for durability and authenticity.

Intelligent Flight Technology:
Powered by the H1 Smart Flight Controller for features like GPS positioning, one-touch return, and auto-hover.
Perfect for all skill levels with advanced functions like altitude hold, low-voltage return, and signal loss recovery.

Optimized Aerodynamics & Stability:
Triple rotor head with a DFC flybarless design for smooth handling and reduced drag.
Enhanced power efficiency and structural stability minimize the risk of damage during flight.

Powerful Performance:
Equipped with a professional JCZK-470L brushless motor, delivering 1150W output with low heat.
Long-lasting 4000mAh 4S battery supports up to 10 minutes of flight per charge and over 500 charge cycles.

Premium Accessories for Seamless Operation:
Spring-damped landing gear for impact protection.
AT9S PRO 12-channel remote control with LCD display for precise navigation.
LED navigation lights and an 80W IMAX B6AC smart charger included.

 

4.How to buy?

Click here:JCZK 300C PRO

 

5.Is there a detailed operation tutorial?

of course

 

6.Why does it look so much like the sparrow in GTA5?

Haha. I believe you are also a veteran GTA5 player. Of course, I had the same thought when I saw it. But in fact, they are different. There is a big difference.

 

7.What's in the box of JCZK 300C PRO?

1.JCZK 300C PRO RC Helicopter *1
2.RadioLink AT9S PRO Remote Controller *1
3.YPG 4000mAh 4S LiPo Battery *1
4.B6 Intelligent Balance Charger *1
5.User Manual *1

 

 

 

8.What is the size？

• Dimensions:
  • Product: 70 x 82 x 23cm
  • Package: 75 x 34.5 x 25.5cm
• Body Dimensions:
  • Length: 700mm
  • Width: 125mm
  • Height: 230mm

9.What is the maximum load and hovering stability of this RC helicopter?

The helicopter has very high flight stability, especially in GPS positioning and automatic hovering mode, and can still maintain stable flight in strong winds or complex environments. However, considering that the main purpose of the design is the flight experience, not the carrying of cargo, it is recommended not to try to add additional loads.

10.Does this helicopter come with pre-installed software or apps?

Currently, the helicopter does not require additional software or applications for flight control. All flight functions can be directly controlled by the remote control, which is very convenient.

11.What functions does the remote controller of this RC helicopter have?

Equipped with AT9S PRO 12-channel remote controller, it has an LCD display screen for real-time monitoring of flight status. It supports multiple flight modes, and the operation of the remote controller is very intuitive, suitable for enthusiasts of different levels.

12.What are the materials and structure of the helicopter?

The helicopter uses high-strength alloy materials and high-wear-resistant surface treatment (anodizing and sandblasting) to ensure high durability after long-term use. In addition, the fuselage design pays great attention to structural stability, especially the optimized three-rotor head and DFC balance bar-free design, which can effectively improve flight stability and control accuracy.

13.Does the flight control of this helicopter support a stabilized mode?

Yes, the H1 intelligent flight controller supports multiple flight modes, including stable mode, sport mode, etc. The stable mode makes the flight more stable, especially when the wind is strong or the control is unstable, it can provide a better sense of control.

14.Is this helicopter easy to repair or replace parts on?

Yes, the structure of this helicopter is very convenient for repair and replacement of parts. The fuselage is made of alloy material, which is durable. At the same time, important parts (such as motors, servos and batteries) can be replaced separately, which is very convenient for repair and maintenance. If there are any damaged parts, you can contact us at any time.

15.I am a beginner, is it suitable for me to buy this RC helicopter?

Absolutely suitable! The helicopter is equipped with an H1 intelligent flight controller, which supports automatic hovering, GPS positioning, one-key return and other functions, which can help you easily control the flight. Whether you are a novice or an experienced pilot, you can enjoy a smooth flight experience. And we provide detailed tutorials

16.What is the flight time of this RC helicopter on a full charge?

This helicopter is equipped with a 4000mAh 4S 30C battery, and the flight time is about 10 minutes. The battery can be charged more than 500 times, ensuring long-term use.

17.Does the helicopter support FPV flight?

Of course. You can mount cameras like Insta 360 and GoPro Max 360 on the tail of the helicopter and use them to shoot videos to show the flying experience.

18.What does a helicopter sound like when flying?

The sounds of this RC helicopter are very realistic, and the sound when flying is similar to that of a real helicopter, giving you an immersive flying experience.

19.I'm interested in helicopters. Is there any way I can learn more about them?

Of course please contact our customer service

 

20.  What Should I Know before Buying the JCZK 300c pro RC Helicopter?

 

Precautions

• High-Risk Product: Remote-controlled airplanes and helicopters are advanced hobby products. Always fly in areas away from crowds. Improper assembly, unfamiliar operation, or malfunctioning mechanical or electronic components can lead to loss of control, crashes, and damage. Pilots must always prioritize safety and take responsibility for any accidents caused by negligence.

• Pre-Flight Checklist: Before every flight, carefully check that all screws on the main rotor clamp, tail rotor clamp, and various parts of the fuselage are securely fastened. Ensure all components are properly locked in place before takeoff.

Disclaimer

• The JCZK-300C remote control helicopter is not a toy. It’s a high-tech leisure product, and improper use or lack of experience can result in serious injury or even death. We recommend practicing with a simulator to familiarize yourself with the flight controls and ensure you understand flight principles. Always be aware of your surroundings and prioritize your own safety.

• Liability: The manufacturer and sellers of the remote-controlled helicopter are not liable for accidents or damage caused by improper assembly, abnormal use, or failure to follow safety precautions. As the user, you are responsible for the environment in which you operate the model and for your own actions.

• Consumable Product: Model airplanes and helicopters are high-performance, consumable products that require skillful handling. Over time, parts may wear out or become damaged. Due to the nature of this product, it cannot be returned or replaced if damaged through use. For maintenance or repairs, we offer technical support, access to special parts, and factory repair services (labor costs ≤￥150, with additional fees for parts replacement). We are not responsible for damage or injury caused by improper use, assembly, or modifications. Users bear full responsibility for any accidents or issues arising from misuse.

 

 

21. What type of transmitter does the 300C Pro come with?
It includes the RadioLink 9S Pro transmitter, providing precise and reliable control. The transmitter supports multiple flight modes and can be upgraded with additional settings to fine-tune your flying experience.

22. Does the 300C Pro have GPS and smart flight modes?
Yes! The built-in GPS allows for smart features such as automatic return-to-home, altitude hold, and programmable flight paths, making flying more convenient and reducing the risk of crashes.

23. What power system does the 300C Pro use?
The helicopter is powered by a brushless motor, delivering high efficiency and strong performance. It also includes an electronic speed controller (ESC) designed for stable power output and smooth throttle response.

24. Can I add a 1/12 scale pilot figure to the cockpit?
Yes! The 300C Pro’s cockpit is designed to fit a 1/12 scale pilot or soldier figure, allowing you to personalize your helicopter for a realistic military or civilian aircraft look. Just like in Essential RC’s video, adding a pilot enhances the realism without affecting the flight performance. Please note: The pilot figure is not included and must be purchased separately. (Images courtesy of Essential RC.)

25. Will the added pilot figure affect flight performance?
No, as long as you use a lightweight 1/12 scale figure, it will not interfere with the balance, stability, or flight characteristics of the helicopter.

26. What kind of batteries does the helicopter use?
The 300C Pro is powered by a high-capacity LiPo battery, providing extended flight time and consistent power output. The package includes a high-quality IMAX B6AC Dual Power Charger for safe and efficient charging.

27. How long is the flight time?
The flight time varies depending on weather conditions and flight style, but generally, the 300C Pro can fly for around 10–15 minutes per charge.

28. Can I use FPV (first-person view) with the 300C Pro?
While it does not come with a built-in FPV system, many users have successfully installed small FPV cameras to enjoy immersive, real-time aerial views.

29. Does the 300C Pro support manual 3D aerobatics?
The 300C Pro is primarily designed for stable, scale-like flight with GPS assistance. However, experienced pilots can switch to manual mode for more aggressive flight maneuvers.

30. How does the return-to-home (RTH) function work?
If the signal is lost or the battery runs low, the 300C Pro will automatically return to its takeoff position using GPS guidance, ensuring a safe landing.

31. Is there a difference between the JCZK 300C and the JCZK 300C Pro?
Yes, the JCZK 300C Pro is an upgraded version of the JCZK 300C, featuring a more advanced flight controller, improved GPS functionality, and a more refined design for better stability and performance.

32. Where can I buy the aluminum case and helicopter stand?
The JCZK 300C helicopter stand is available for purchase separately, and you can find it directly through this [accessory link]. However, the 300C Pro does not come with an aluminum case; instead, it includes a high-density foam packaging for protection. If you need assistance finding the stand or other accessories, feel free to contact our customer service at service@stirlingkit.com.

33. Was there a 450 size and a 470?  Or has it only been produced as 470 size?

The JCZK Schweizer 300C PRO has only been produced in the 470 size. There is no 450 size variant for this particular model. The 470 size is a popular configuration for many RC helicopters, providing a good balance between performance and stability, making it ideal for enthusiasts who want a more realistic experience. at the end of 2025, Stirlingkit might release a 700 size Huey Cobra  AH-1 Attack rc helicopter.

34. How can I switch from GPS mode to Attitude (Atti) mode, and then back to GPS mode?
The H1 flight controller only supports Manual 3D Mode and GPS Positioning Mode.

Note: Atti mode (Attitude Mode) offers self-leveling and stabilization, while Manual 3D mode does not. H1 does not support Atti mode.

35. Can we get an FPV view? (Goggles and receiver related)
FPV is possible, but requires user modification.

The canopy is transparent, making camera installation easier.

You can mount a compatible FPV camera and transmitter by securely fixing it in place.

FPV goggles and receivers are not included and must be purchased separately.

36. Does the helicopter have main shaft bearing blocks and tail bearings, or are they just bushings?
All transmission parts of the helicopter, including the main shaft and tail, are equipped with bearings, not bushings.

37. Can the included radio be set to fly in ATT or 6G mode?
No, the H1 flight controller does not support ATT (Attitude) or 6G mode.
It only supports Manual 3D and GPS positioning.

38. I accidentally flashed the firmware without backing it up. How can I recover it?

If you flashed the radio transmitter firmware, you’ll need to reset all radio parameters, re-calibrate the sticks, and re-calibrate the flight controller input range.

If you flashed the flight controller firmware, recovery is more complex. You will need to reconfigure all parameters and conduct full testing.

Warning: If you're not experienced with flight controller tuning, we do not recommend doing this on your own.

39. How to replace the tail rotor belt! for my JCZK 300C PRO?

Replacing the tail rotor belt on your JCZK 300C PRO is a delicate but manageable task if you follow the correct steps. Here’s a clear guide to help you do it safely and efficiently:

🛠 Tools & Materials You’ll Need:
Hex drivers (usually 1.5mm / 2mm / 2.5mm depending on screws)

Small Phillips screwdriver

Replacement tail rotor belt (make sure it’s the right size/model)

Thread locker (for metal-to-metal screws)

Needle-nose pliers (optional)

Patience and a steady hand!

✅ Step-by-Step Belt Replacement Guide:
A. Disconnect the Battery & Remove Blades
Safety first: unplug the battery.

Remove the main and tail rotor blades for better access and safety.

B. Remove Canopy and Boom Cover
Take off the canopy by undoing the mounting clips or screws.

Remove the tail boom cover (usually held by a couple of screws along the boom and frame).

B. Loosen the Tail Boom
Locate the tail boom clamp screws where the boom enters the main frame.

Loosen (don’t fully remove) these screws so you can slide the tail boom out.

C. Slide the Boom Backward
Carefully slide the entire tail boom backward to relieve tension on the belt.

The old belt should now have enough slack to be removed.

D. Remove the Old Belt
Pull the old belt out from the boom.

Inspect the tail pulley and guide rollers for damage or wear.

E. Insert the New Belt
Feed the new belt through the boom from the tail end toward the main frame.

Use a stiff wire or a guide rod if the belt is hard to pass through.

F. Set Belt Direction (Important!)
Before tightening anything, make sure the belt twist is correct:

When looking from behind the helicopter, the tail rotor blades should rotate counterclockwise.

You may need to give the belt a 90° twist to get proper direction and tension.

G. Slide the Boom Forward and Set Tension
Push the boom back into the main frame while pulling the belt tight.

Proper belt tension: the belt should have firm resistance when pushed midway along the boom — not too loose, not too tight.

H. Secure the Boom
Tighten the boom clamp screws while maintaining belt tension.

Recheck belt direction and tail rotor rotation.

I. Reassemble and Test
Reattach the boom cover and canopy.

Reinstall rotor blades.

Power on without flying to check belt alignment, tail rotor function, and vibration.

⚠️ Tips:
If you hear unusual noise after replacement, check for misaligned pulleys or overtensioned belt.

Always use thread locker on metal screws to avoid mid-flight loosening.

40.Is there an additional parts list and prices?

Of course. If you want to buy additional accessories, you can buy additional accessories for 300C here.

41.How to remove the spindle?

You can check out the following three videos to see the complete tutorial of disassembling the 300C RC Helicopter.

42. Is there any difference between JCZK 300 C and JCZK 300 C pro?

The difference is that the flight control chip of JCZK 300C is H1
The flight control chip of JCZK 300C Pro is H2
The remote controller used has also been upgraded

 

 

View more

JCZK 300C PRO FAQ: Everything You Need to Know | Stirlingkit

Essential RC Recommends: 6 Must-Know Tips for Flying the JCZK 300C Pro Smart Helicopter | Stirlingkit

Is the JCZK 300C Pro Worth It? Hear What CAPTAIN DRONE Says | Stirlingkit

Essential RC Recommends: 6 Must-Know Tips for Flying the JCZK 300C Pro Smart Helicopter | Stirlingkit

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