E-flite Viper 70mm EDF Jet: The perfect entry into the world of high-performance jets

The model flight market offers a wide range of aircraft for different levels of experience. For pilots who want to venture into the exciting world of jets, the E-flite Viper 70mm EDF Jet PNP is a remarkable option. This high performance model combines impressive flying properties with amazingly good handling. In this detailed article we consider all important aspects of this model, from technical data to tips for optimizations.

Technical data at a glance

The E-flite Viper 70mm EDF Jet is characterized by its impressive technical features that make it a powerful and accessible model.

The high-performance drive system

The heart of this jet aircraft is its powerful drive system. The built-in high-speed brushless motor with 2860-KV1850 specification is controlled by a robust 70-ampere controller and drives a 12-sheet emitter. This combination not only creates impressive push for almost unlimited climbing, but also a fascinating realistic, turbine-like sound.

In combination with a recommended 6S LiPo battery (3200-4000mAh), the drive delivers an exceptional speed band width with practically immediate gas intake. Particularly remarkable is the sound of the drive system – it comes astonishingly close to the sound of a real turbine, which additionally enriches the flight experience.

Flight behaviour and performance

Increased power and speed

In the performance analysis of the Viper EDF model, the impressive climbing performance first emerges. With a fully charged 6S battery, the aircraft shows an almost unlimited vertical performance. Even steep climbs from low speeds, the jet is effortlessly mastered, which is an indicator of the excellent thrust-weight ratio.

The maximum speed is in the three-digit km/h range, with the precise number depending on various factors such as battery capacity and environmental conditions. Low-speed flights are easy to control even for pilots with less jet experience thanks to the stable flight situation.

suitability for art flight

The Viper EDF-Jet combines its high-speed characteristic with amazing art flight capability. The model dominates clean rolls, large loopings, knife flight and other maneuvers almost effortlessly. The digital metal transmission servos with ball head linkages provide precise control at any speed.

Starting and landing properties

For a jet of this performance class, the model offers remarkably good-natured starting and landing characteristics. The functional flaps considerably improve the slow flight properties and enable shorter start and landing distances at lower speeds. The controllable bow suspension and the broader main suspension provide good soil stability on different surfaces, including asphalt tracks and even short grass.

Material and processing

EPO construction with reinforcements

The lightweight yet robust EPO foam construction is reinforced with composite materials, which offers additional strength and durability. The surface quality is consistently high-quality, with clean lines and an appealing finish that gives the model a realistic appearance.

Mechanical components

The installed components make a good impression. The electric retractors are equipped with durable metal components and spring-mounted wire struts which allow operation on different surfaces. The digital, metal-driven servos with ball head linkages provide crisp and precise control at any speed.

Assembly and installation

Fast assembly

One of the great strengths of the Viper Jet is the fast and uncomplicated assembly. The one-piece wing and the guides are simply screwed – adhesive is not required. This makes the transportability of the model particularly attractive as it can be easily disassembled for transport and can be quickly reassembled at the airfield.

The detailed cockpit area is integrated into the large, top-mounted hatch that allows easy and convenient access to the flight battery. This is a sophisticated design element that accelerates battery change between flights.

Target group and entry into jet aviation

The Viper 70mm Jet positions itself as an ideal choice for experienced pilots as well as for beginners in the Jet category. With its good-natured handling, reminiscent of sports aircraft, combined with impressive performance and art flight suitability, it offers the perfect entry into the world of EDF jeets.

Especially valuable for beginners is the combination of high speed and performance with amazingly good flight characteristics. The functional flaps significantly improve the slow flight properties, which significantly simplifies start and landing – the most critical phases for jet newcomers.

Flight times and battery management

With a recommended 6S 3200-4000mAh LiPo battery, pilots can expect flight times between 4-6 minutes depending on the flight style. Longer flight times are also possible with conservative gas control and the omission of continuous full gas passages. It is recommended to keep several batteries ready for a day of flight.

An interesting aspect is battery positioning, which allows a precise focus adjustment. The generous battery shaft offers space for different battery sizes and allows fine adjustment of the center of gravity by moving the battery.

Spare parts supply and support

The spare parts supply for the E-flite Viper Jet is well secured by the established distribution network of Horizon Hobby. Standard components such as servos, suspensions and the drivetrain are readily available. Especially important: The modular design makes it easy to replace many parts in the event of damage.

The community support for this model is remarkable. In numerous model building forums and special Facebook groups you will find helpful tips on settings, modifications and problem solutions. This active community is a valuable factor for newcomers, who can quickly get competent help on questions.

Competition products compared

Freewing Avanti S 80mm EDF Jet

The Freewing Avanti S with 80mm EDF unit positions itself as a direct competitor to the Viper Jet. With a slightly larger impeller, the Avanti offers even more thrust, but is also correspondingly heavier. In comparison:

• Size: The Avanti is slightly more compact with 1042mm span than the Viper
• Performance: The 80mm Impeller offers more thrust, but also higher power consumption
• Handling: A little less start-up-friendly than the Viper
• Price: In a comparable price class

FMS F-16 70mm EDF Jet

The F-16 from FMS speaks with its true-scale optics especially to scale enthusiasts:

• Scale optics: Significantly more realistic reproduction of the original compared to the more sporty design of the Viper
• Handling: Typical F-16 flight properties with higher requirements on the pilots
• Construction: EPO foam, but with other detailed solutions
• Price: Mostly a little cheaper than the E-flite Viper EDF Jet

HSD Superhawk 70mm EDF Jet

The Superhawk offers as an alternative:

• Robustness: Known for particularly durable construction
• Flight behaviour: Stable but less agile than the Viper
• Community: Smaller but very dedicated fan community
• Price performance: Often classified as particularly inexpensive

Value for money

The electric beam model jet from E-flite moves in the middle to upper price segment for 70mm EDF-Jets. The pricing is justified by several factors:

• High-quality components, in particular the digital metal transmission servos
• Reliable electric retractors
• Built-in design with easy assembly
• Excellent flying properties for beginners and advanced

Compared to cheaper alternatives, the Viper Jet offers more reliability and better flight characteristics, which is particularly valuable for beginners in the Jet category. The investment in a high-quality first model can save costs in the long term, as repairs by crash due to low-grade components are avoided.

Tips, tricks and optimizations

Priority

The correct focus is crucial for safe flight behavior. Experiment carefully with the battery position to find the ideal handling. A slightly head-loaded focus can provide more stability for beginners, while advanced pilots can benefit from a somewhat more backward focus on agile behavior.

Rudder

For the first flight moderate rudder fittings are recommended:

• Cross rudder: 12-15mm up/down
• Height Rudder: 10-12mm up/down
• Side rods: 15-18mm to left/right

With increasing experience, the ruffles can be gradually increased to unlock the full suitability for art flight.

Battery optimization

The power of the Viper Jet depends heavily on the battery used. Watch:

• High quality 6S LiPo with at least 30C discharge rate
• Low internal resistance for maximum power output
• Correct balance of the battery before any flight

A high-quality battery can make the difference between moderate and impressive performance.

Landing flap adjustment

The factory settings of the landing flaps are suitable for most pilots. However, if necessary, the following adjustments can be made:

• Moderate folding position: 15° for shortened landing
• Full flap position: 30° for minimum landing speed
• Height-rudering mix: 2-3mm height-ruder task with extended flaps prevents buoyancy

Chassis optimization

The electric retractors function reliably but can be optimized for even better performance:

• Lightweight mechanical fat for smoother function
• Testing of wheels with ease
• If necessary, increase the suspension of the main suspensions easily for operation on uneven ground

Frequent questions and problems of users

Question: How does the PNP version differ from the BNF version?

Answer: The PNP version (Plug-N-Play) is delivered without receiver, while the BNF version (Bind-N-Fly) contains a pre-installed spectrum receiver with AS3X and optional SAFE technology. The PNP version requires the installation of its own receiver, but offers the freedom to use the preferred remote control system. In the BNF version, pilots benefit from the stabilizing AS3X technology, which can be helpful especially in windy conditions.

Question: Which batteries are best suited for optimal performance?

Answer: 6S LiPo batteries with 3200-4000mAh capacity and a discharge rate of at least 30C are recommended for best results. Popular brands are Spectrum Smart, Tattu and GensAce. In the selection, besides the capacity, attention should be paid to the weight in order not to increase the weight of the flight unnecessarily. A good compromise from performance and flight time offers 6S 3700mAh 35C batteries.

Problem: Vibrations in flight

Solution: Vibrations can impair flight performance and load electronic components. First check the Impeller for damage or unbalance. Even small damage to the impeller blades can cause strong vibrations. Also make sure that the motor is securely attached and all screws are tightened. In some cases, the installation of thin rubber bearings between the engine and the engine spant can reduce the vibrations.

Problem: Inadequate rise rate despite full gas

Solution: Several factors can affect the rate of increase. First check the battery – a worn or low-quality battery can dramatically reduce power. The focus also plays a role; a center of gravity lying too far behind can limit the gradient. Finally, you should check the air inlet and the impeller for dirt or foreign bodies that could impede the airflow.

Question: Is the Viper Jet suitable for beginners?

Answer: Although the jet jet was designed for beginners in the jet category, it is not suitable for absolute beginners in the RC flight. Pilots should already have experience with fast propeller models before moving to this jet. The BNF version with SAFE technology offers additional support through self-stabilization, which can facilitate entry. For optimal entry, a step-by-step approach to the performance of the model is recommended.

Problem: difficulty starting grass pistes

Solution: Starts of grass pistes can be challenging. Use larger wheels (optionally available) for better rolling properties or improvise with a temporary plywood or a plastic mat. Pay attention to sufficient speed before lifting and use the flaps in a moderate position (15°) to generate more boost at lower speeds.

Problem: Overheating the engine or regulator

Solution: Overheating problems can be caused by several factors. Make sure the air inlet and outlet are free from obstacles. Check the cabling for short circuits or damage. If necessary, reduce the flight time with extreme full gas passages and allow the components to cool sufficiently between the flights. In case of recurring problems, an upgrade of the cooling system or a higher-value ESC can be considered.

Conclusion: An extraordinary entry into the world of jets

The E-flite Viper 70mm EDF Jet represents an excellent compromise between performance and accessibility. It combines the exciting performance of a high-performance EDF jet with the good-natured handling of a sports aircraft, making it an ideal candidate for entry into the jet category.

The sophisticated design with quick, toolless mounting, the high-quality components and the impressive flight characteristics justify the price. Particularly noteworthy are the functional flaps and the reliable electric retractor, which together with the powerful drive system provide a comprehensive jet experience.

For pilots who want to drive the jump from propeller aircraft to jet, this model offers a gentle transition without having to miss out on the fascination of high speeds and impressive maneuverability. With the right preparation, high-quality batteries and careful setting, this jet will enchant both beginners and experienced pilots a lasting smile in the face.