What's the difference between PNP, SPNP, BNF, SRTF?

For seasoned RC aircraft enthusiasts, terms like PNP, SPNP, BNF, and SRTF are second nature. But for newcomers, these abbreviations can be confusing, and choosing the right rc airplane might seem overwhelming. This guide will break down these four types of Dynam RC airplanes to help you make more informed decisions with confidence.

PNP (Plug-and-Play) refers to a design that is ready for quick assembly. It comes equipped with Kit, servos, TomCat brushless motors, landing gear (fixed or retractable) and Skylord Electronic Speed Controller (ESC), but does not include a Detrum transmitter, MSR66A iStone stabilizer receiver, battery, or charger. This option is perfect for those who already own some of these electronics. It offers flexibility and allows you to quickly assemble and connect everything, making it a user-friendly choice for enthusiasts.

Dynam FW-190 PNP Version


SPNP (Plug-and-Play + iStone) builds upon the basic PNP design by integrating advanced smart technology, such as the iStone 6-axis gyro stabilizer system. This system features automatic stabilization, recovery functions, and stunt flight modes, making it suitable for pilots of all skill levels and an ideal choice for a wide range of users.

Dynam FW-190 SPNP Version


BNF (Bind-and-Fly) models come pre-installed with a MSR66A receiver built-in iStone stabilizer w/ ABS. Pilots simply need to purchase a Detrum transmitter, battery, charger and bind it to the aircraft for immediate flight. This option is particularly advantageous for pilots who already own a transmitter, allowing them to choose and configure different brands to meet their specific needs.

Dynam FW-190 BNF Version


SRTF (Smart Ready-To-Fly) denotes a complete flight package that is ready for use straight out of the box, requiring no additional purchases. The package includes a Detrum transmitter, MSR66A iStone stabilizer receiver, battery, and charger, greatly simplifying the setup process and enabling beginners to get flying quickly without complex configurations. In recent years, SRTF models have gained popularity for their convenience and ease of entry.

Dynam FW-190 SRTF-8C Version


Understanding these abbreviations not only influences product selection and usage but also directly impacts the convenience and enjoyment of the flying experience. For pilots at different skill levels, grasping these concepts aids in selecting the appropriate equipment, enhancing their skills, and enjoying the thrill of flight. Beginners can easily get started with SRTF models, while more experienced pilots can leverage PNP, BNF, and SPNP for more complex flying and personalized configurations.

I. PNP Version

PNP (Plug-and-Play) is a design commonly used in RC aircraft, allowing users to quickly connect the battery and electronic components without complex setups.


For example, the Dynam F6F Hellcat PNP comes equipped with essential electronic components. The Detrum BM3720 brushless motor, Skylord-50A 5A BEC, 4x 9g servos, and most of the control linkages and spares are pre-installed at the Dynam factory. This saves a significant amount of assembly time. For anyone looking to experience the excitement of flying an RC aircraft, the Dynam F6F Hellcat V2 is an excellent choice.

Dynam F6F Hellcat V2 4S RC Warbird Plane 1270mm w/ Flaps

Dynam F6F Hellcat V2 4S PNP

Target Audience for PNP Models

  • Beginners: PNP models offer ease of use and a quick learning curve. For those new to RC models, PNP designs provide a straightforward connection method, minimizing the complexities of assembly and tuning. This allows newcomers to experience flying in a short amount of time, helping them build confidence and develop an interest in the hobby. PNP models are ideal for newcomers due to their ease of use and quick learning curve. With minimal assembly required, beginners can focus on flying rather than dealing with complex setups. This fast-tracks their experience and builds confidence in the hobby.
  • Casual Flyers: For recreational enthusiasts, PNP models require moderate technical knowledge, making them suitable for users who prefer a simpler approach and want to quickly enjoy the thrill of flying. Convenience is a key factor for these pilots; PNP models are ideal for those who do not wish to spend excessive time on assembly.
  • Intermediate Pilots: For those with some experience, PNP aircraft offer opportunities for different configurations and adjustments, enabling pilots to enhance their flying skills and techniques.

Advantages of PNP Models

Pilots who choose PNP models benefit from the simplicity of connecting the battery and other components to their respective connectors, eliminating the need for complex wiring or soldering. This convenience significantly reduces assembly time, allowing users to transition quickly from unboxing to flying, thus enhancing the overall experience.

Additionally, PNP models enable users to select their preferred battery and transmitter, making upgrades and personalized configurations easy. This flexibility reduces the reliance on technical knowledge, making it suitable for pilots of all skill levels. Typically, PNP designs undergo professional tuning, ensuring excellent flight performance and stability.

Overall, PNP is an attractive option for those with some flying experience and the necessary equipment, as its user-friendliness and convenience allow users to quickly enjoy the thrill of flight.

II. SPNP Version

SPNP (Smart Plug-and-Play) is an enhanced version of traditional PNP models, integrating smart technology and features that offer greater control and stability, aimed at elevating the flying experience and performance.

The Dynam SPNP (PNP + iStone All V2) RC aircraft is a versatile and user-friendly model designed for RC enthusiasts. Combining a straightforward plug-and-play setup with the advanced iStone stabilization system, it caters to a wide range of pilots. The PNP + iStone version includes the iStoneAll V2 6-axis gyro stabilizer, which is compatible with major radio transmitter brands such as Futaba, Spektrum, and Detrum, providing excellent versatility and flight performance.

How iStone Enhances Flight and Its Operational Modes

The iStone series of stabilizers utilizes RC technology, flight control algorithms, and rapid data analysis to help aircraft fly more safely.

The iStone All V2 gyro stabilizer features include: high-precision 6-axis stabilization, automatic recovery, and one-key rescue functions. It is compatible with most receivers and allows for parameter and sensitivity adjustments via a 3-in-1 programming card with an LCD display. Additionally, a gyro-off mode is available for manual flying.

For different aircraft, the parameters and sensitivity of the gyro receiver can be directly programmed using Detrum transmitters (Gavin6C/Gavin8C/Blitz DT9). The setup process is quick and straightforward; if you prefer not to utilize the gyro during flight, simply select the gyro-off mode on your transmitter.

Operational Modes of the iStone Stabilizer:

  • Automatic Recovery Mode (also known as Auto-Balance Mode):Selecting this mode locks the tilt angles on the pitch and roll axes, allowing the aircraft to maintain level flight automatically. It also senses the angular velocity on the yaw axis and responds instantly. In emergency situations, switching to this mode from others will enable the aircraft to automatically return to level flight—this one-key rescue feature is ideal for beginners and FPV applications.
  • Normal Mode:In this mode, the gyro senses angular velocities across all axes and responds instantaneously. Normal mode is suitable for all types of aircraft and effectively enhances stability, particularly in windy outdoor conditions.
  • Stunt Mode:This mode adds a height-holding feature to the gyro. If the transmitter does not issue commands during flight, the aircraft will lock into its previous attitude. This mode is particularly useful for performing aerial stunts.
  • Gyro Off Mode:Selecting this mode will disable the gyro across all channels, allowing for manual control without stabilization.

Detrum iStoneAll V2 DSM & S-BUS 6-AXIS Gyro & Stabilizer for Airplanes - DTM-G003V2
Detrum iStoneAll V2 DSM & S-BUS 6-AXIS Gyro & Stabilizer for EP RC Airplanes

Target Audience for SPNP Models

  • For Beginners: iStone gyro provides enhanced safety features, such as Auto-balance (Safe) Mode, offering additional security for new pilots. Even users who are not technically proficient can quickly grasp flying skills with these intelligent features.
  • For Casual Flyers: The inclusion of smart functionalities enhances the flying experience and adds enjoyment. Recreational users can benefit from smoother flights and simpler operations, thanks to features like smart programming and various flight modes, which increase the overall fun of flying.
  • For Intermediate and Advanced Pilots: iStone gyro offers greater adjustability and data analysis capabilities. Pilots can tweak multiple parameters and settings to meet their specific needs, while the system also provides flight data feedback, helping them optimize their flying techniques.

Advantages of SPNP Models

SPNP models offer a variety of flight modes suitable for different flying scenarios, ranging from simple, stable flights to complex aerobatics. They integrate multiple smart technologies, such as automatic flight modes and stability control, enhancing both flight safety and stability. The plug-and-play design allows users to easily set up and start flying, significantly reducing the learning curve.

Through smart applications or devices, users can access real-time flight data and analysis, aiding in the improvement of flying skills. These intelligent technologies are often optimized to provide better flight stability and minimize the risk of accidents.

SPNP is an advanced choice suitable for pilots of all experience levels, combining smart technology with user-friendliness to offer a rich flying experience. For those prioritizing safety, convenience, and performance, SPNP is undoubtedly an excellent option.

III. BNF Version

BNF (Bind-and-Fly) refers to RC aircraft that come pre-installed with a MSR66A receiver, allowing users to bind it to Detrum transmitter with minimal setup, making it quick and easy to use right out of the box.

BNF models include everything you need for flying, except for the transmitter and battery pack (battery and charger). They come equipped with the model kit, Detrum brushless motor, TomCat Skylord ESC, servos, and the MSR66A iStone gyro receiver. These aircraft are user-friendly, versatile, and safe, making them an ideal choice for both beginners and experienced pilots. The BNF versions, such as those with the MSR66A receiver, are specifically designed to work seamlessly with Detrum transmitters.

Target Audience for BNF Models

BNF (Bind-and-Fly) models are suitable for users with a certain level of flying experience who have a basic understanding of flight operations and transmitter use. They are ideal for those who have mastered fundamental flying techniques and are looking to challenge themselves with more complex maneuvers. Intermediate users often seek to personalize their models, and BNF allows them to use their own transmitters. For enthusiasts who enjoy fine-tuning and optimizing flight performance, BNF offers greater flexibility, enabling them to select different transmitters and configurations to enhance their flying experience. For users looking to advance their skills and tackle more intricate flight modes, BNF is an excellent choice.

Advantages of BNF Models

The primary advantage of BNF models is that users can choose their preferred transmitter, making it easy to upgrade and adjust according to various needs. Users simply bind the model to their transmitter, allowing for a quick and easy setup that reduces assembly and configuration time. This customization lets pilots select transmitters and settings that match their operating habits and flying requirements, thereby enhancing flight performance.

Since users can choose their own remote devices, BNF models are typically more economical than PNP models, as there is no need to purchase a bundled Detrum transmitter. BNF models are versatile enough to accommodate a range of flying scenarios, from simple recreational flights to complex aerobatics.

Overall, BNF represents a flexible and adaptable RC aircraft option for intermediate and advanced pilots. It offers a high degree of customization, allowing users to optimize flight performance based on their individual preferences. However, for beginners, the learning and binding process may present some challenges. When selecting a BNF model, users should make informed decisions based on their experience level and familiarity with transmitters to ensure an optimal flying experience.

Detrum MSR66A 6CH 2.4Ghz Mini Receiver iStone 6-Axis Gyro Stabilizer w/ ABS System - DTM-R005

MSR66A 6CH 2.4Ghz Receiver iStone 6-Axis Gyro Stabilizer w/ ABS System

IV. SRTF Version

SRTF (Smart Ready-To-Fly) is a model designed specifically for RC aircraft enthusiasts, aimed at simplifying the flying experience and lowering the entry barrier for newcomers.

The Dynam SRTF version is based on the standard RTF (Ready to Fly) concept and integrates the iStone 6-axis gyro stabilizer and ABS system. With this model, everything you need for flying is included in one package. The radio system (Detrum transmitter and receiver), battery pack (battery and charger), and all other essential electronic components are pre-installed and ready to go.

The SRTF package contains the model kit, Detrum brushless motor, TomCat Skylord ESC, servos, Detrum transmitter, MSR66A iStone gyro receiver, battery, charger, and adapters. RTF aircraft provide an excellent way to enjoy the thrill of flying without the hassle of extensive setup.

Target Audience for SRTF Models

SRTF (Smart Ready-To-Fly) models are specifically designed for beginners, offering simplified controls that make them ideal for new pilots. Their safety and ease of operation make them suitable for family activities and youth learning. For enthusiasts who love flying Dynam RC airplanes, SRTF provides a convenient flying experience. Many science courses in schools also utilize SRTF models to help students understand the principles of flight and physics.

Advantages of SRTF Models

The primary advantage of SRTF models is that they are typically pre-assembled, allowing users to simply charge and install the battery before taking off, eliminating the complexities of assembly. Most SRTF models come equipped with advanced flight control systems that enhance stability and reduce the risk of loss of control. Some SRTF models include smart flight features, such as automatic return-to-home and altitude hold, which lower the difficulty of flying.
Additionally, parts are usually easy to replace, making maintenance straightforward, which is perfect for beginners looking to perform basic upkeep.

SRTF RC aircraft models offer users a simple and convenient flying experience, suitable for a wide range of pilots, especially beginners. While there may be some limitations, their ease of control, durability, and smart features make them a popular choice. By selecting the right model and flying location, users can maximize their enjoyment and experience.

Detrum GAVIN-8C 8CH 2.4Ghz Digital Transmitter - DTM-T008

Detrum GAVIN-8C 8CH 2.4Ghz Digital Transmitter

V. Choosing the Right RC Aircraft: A Guide for Different Pilots

Selecting the appropriate type of Dynam RC aircraft depends on individual experience levels, interests, and needs. For beginners, SRTF models are the best choice, as they simplify the flying experience and reduce the learning curve. Intermediate users may opt for BNF or SPNP models for quicker flights and enhanced capabilities. Meanwhile, those who enjoy DIY projects can consider PNP models for a more hands-on approach.

By understanding the advantages and disadvantages of each type and aligning them with your personal circumstances, you can make an informed decision that will enhance your enjoyment of RC flying.

VI. Choosing the Right RC Model for Your Experience and Goals

Selecting the appropriate model based on your flying experience and objectives will enhance your enjoyment and satisfaction in the hobby of remote-controlled airplanes. Beginners should prioritize stability and safety, while recreational flyers and experienced pilots can focus on performance and ease of use. Competitive pilots should choose models that emphasize efficiency and speed.

SRTF is the best choice for newcomers, as it is simple to operate and requires no additional setup. BNF is suitable for users who already have a transmitter but prefer not to deal with complex assembly. PNP and SPNP models cater to those with substantial experience and existing equipment.

With this information and guidance, we hope you can make the best choice for your RC flying journey.

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