E-flite Viper 64mm EDF Jet PNP (EFL07775): The ultimate guide for buyers

With the Viper 64mm EDF Jet from E-flite, the world of remote-controlled aircraft has received a remarkable model that enthuses both experienced pilots and beginners to the world of EDF jets. In this comprehensive article, we will take a closer look at the compact electric-impeller model from E-flite and will examine all important aspects relevant to buyers.

Technical data and specifications

Before we dive into the details, we get an overview of the technical data of the E-flite Viper 64mm EDF Jet PNP (EFL07775):

The Viper Jet in 64mm format impresses with its sophisticated design and offers excellent flight behavior combined with a realistic appearance. The components installed on the factory are optimally matched to each other and enable a quick ready-to-use model.

Target group and application area

The compact E-flite jet jet is aimed at a wide audience. Thanks to the good-natured flight behavior, the model is also suitable for pilots who want to gain their first experience with EDF jets. At the same time, the Viper offers enough performance reserves and art skills to inspire experienced pilots.

The wide range of speeds is particularly important. The 64mm Impeller-Jet offers a versatile flight experience from leisurely cruises to fast-paced low flights. The landing flaps installed on the factory also improve the slow flight behavior and enable shorter starting and landing routes.

For pilots who already have experience with low-deckers and want to enter the world of EDF jets, this model is an ideal choice. It combines the appearance and performance of a jet with the familiar handling of a sports aircraft.

Material and processing

The processing of the E-flite Viper 64mm EDF Jet PNP shows the high quality for which the manufacturer is known. The hull and the supporting surfaces are made of light, yet stable EPO foam reinforced by composite materials. This combination ensures sufficient strength while at the same time low weight.

The surfaces are cleanly processed and provided with a striking, clearly visible painting designed by the renowned Aircraft Studio Design. The visibility of the model is guaranteed even at larger distances.

The factory-installed details such as:

• Magnetically secured and easily removable nose cone
• LED navigation and landing lights
• Detailed cockpit with pilot figure
• Spacious and practical upper hatch

The servo drives are equipped with ball joints, which ensures precise and play-free rudder deflections. The seven pre-installed digital servos react quickly and precisely to control inputs.

Assembly and assembly

A great advantage of the model is the fast and easy installation. The manufacturer promises that the aircraft is ready for use in less time than it takes to charge a battery – and this statement is quite true.

No adhesive or special tools are required for assembly. The one-piece wing is simply plugged on, whereby the servo connections are automatically produced. This well-thought-out system also allows quick demonting for transport.

The optional suspension can be mounted or disassembled without a tool. In the case of flights via grass surfaces, it is recommended to remove the suspension in order to improve the speed and inclinability and to minimize the risk of damage.

The enclosed guide is clearly designed and also leads less experienced model builders safely through assembly. Imprinted steps and clear instructions greatly facilitate the process.

Flight characteristics and performance

Start-up behaviour

The Viper 64mm EDF Jet can be started from the train with a mounted suspension and can be brought into the air by hand. For hand-starts, the model has formed handle depressions that allow for safe holding. In the BNF Basic version (not part of this article), an automatic hand start assistance mode is also available.

With mounted suspension, short starting distances are possible, especially when the landing flaps are used for the start. The suspension with steerable boom and shock-absorbing suspension legs ensures safe rolling on the slope.

Flight behaviour

In the flight, the compact jet shows its true potential. The flight properties can be described as balanced and good-natured, which is particularly important for beginners in the EDF class. At the same time, the model offers enough power reserves for dynamic maneuvers and impressive art flight figures.

The 11-sheet Impeller not only generates a realistic, turbine-like sound, but also ensures an impressive thrust development. The optimised air duct system, which does not have the usual "heater hots" in some models, nevertheless delivers efficient performance, is particularly important.

The maximum speed of the Viper Jet is remarkable and is in the upper range of its class. At the same time, the model remains easily controllable even at low speeds, especially with extended flaps.

Increased power

The vertical performance of the E-flite Viper 64mm EDF convinces. With a freshly charged 4S battery, impressive climbing flights are possible. The optimized air duct in the fuselage contributes significantly to this good performance and positively distinguishes the Viper from many other models of this size class.

Land behaviour

Thanks to the factory-installed landing flaps, the approach can be slow and controlled. The landing flaps significantly improve the slow flight behavior and allow precise landings in a limited space.

In the case of landings without suspension, the reinforced torso floor slides gently over short mowed lawns without taking damage. With mounted suspension, landings on uneven slopes are easily possible thanks to the spring-loaded main chassis.

Flight times and battery management

With a recommended 4S LiPo battery (2200-3200mAh), flight times between 4 and 7 minutes are realistic depending on the flight style. With sporty flight style with frequent full gas phases, the flight time is reduced accordingly.

The built-in range Avian Smart Lite controller offers a decisive advantage: It provides real-time data for power consumption, battery voltage and engine speed. These telemetry data are transmitted directly to the pilots when using compatible receivers and transmitters, both with smart batteries and with conventional LiPo batteries.

This functionality allows precise energy management and helps to optimally use the available flight time. It also significantly reduces the risk of emergency landing due to an empty battery.

Transport capacity

The compact dimensions and low weight make the E-flite Viper 64mm easy to transport. The one-piece wing can be easily separated from the hull for transport. The servo-connections are automatically released, which allows for rapid dismantling and assembly.

A suitable transport bag or box is recommended for safe transport. The market offers various solutions designed specifically for models of this size.

Spare parts supply

E-flite belongs to the Horizon Hobby Group, one of the largest providers in the RC sector. The spare part supply is correspondingly good and reliable. Long wear parts such as propellers, gear wheels and servo arms are readily available.

For the Viper 64mm EDF Jet specific spare parts such as Impeller, engine unit, chassis components and body parts can be moved via the specialist trade or directly via Horizon Hobby. The good availability of spare parts is an important factor for the long-term use of the model.

Customer reviews and experiences

The feedback from buyers of the E-flite Viper 64mm EDF Jet PNP is predominantly positive. The following aspects are particularly praised:

• Easy and quick assembly
• Excellent flying behavior for an EDF jet
• Good visibility thanks to striking color scheme
• Impressive speed and gradient
• High quality processing and robust design

Some users report small adjustments they have made to adapt the model even better to their needs. These include, for example,:

• Optimization of the focus position
• Adjustment of rudder rudders
• Installation of additional LED lighting
• Use of alternative battery types for specific flight characteristics

There is some criticism regarding the flight time, which is relatively short in aggressive flight style. However, this limitation is common for compact EDF jets in this performance class and not specific for the E-flite model.

Test results and expert reviews

In specialist tests, the compact jet is continuously cutting off well. Testers particularly highlight the balanced flight characteristics that make the model suitable for beginners in the EDF class.

The processing quality is consistently classified as high quality in tests. Particularly the precise servo-drives and the stable construction find positive mention. The well-thought-out air guide system for the impeller is also praised, since it enables efficient cooling and good thrust without additional air inlets.

The electronic components also receive good reviews in tests. The pre-installed Brushless external rotor motor and the 70A controller are well matched and provide sufficient power for dynamic flight maneuvers.

Alternative products of competitors

Anyone interested in the E-flite Viper 64mm EDF Jet should also take a look at comparable models to make a sound purchasing decision:

FMS 64mm Super Scorpion EDF Jet

This model offers similar dimensions and flight characteristics as the E-flite Viper. Advantages of the Scorpion are the slightly lower price and the optional REFLEX flight stabilization. On the other hand, the Viper scores with better spare part supply and the smart telemetry system.

Freewing 64mm F-16 Fighting Falcon

The F-16 from Freewing offers a more realistic scale appearance of a real combat jet. The flying characteristics are somewhat more demanding than the Viper, which can be interesting for advanced pilots. However, the construction quality of the E-flite model is often considered to be more high-quality.

HobbyKing 64mm ArrowViper EDF Jet

As a more affordable alternative, HobbyKing offers the ArrowViper. This model is aimed more at price-conscious buyers, but does not offer the same processing quality and support as the e-flite product. The flight characteristics are generally comparable but less precise.

In direct comparison with competing products, the E-flite Viper 64mm EDF Jet stands out due to its balanced combination of quality, flight characteristics and support. The somewhat higher price is justified by better processing and long-term spare parts supply.

Value for money

With a price in the middle to upper segment for jets of this size class, the E-flite jet is not a bargain. The price-performance ratio can nevertheless be rated as good if the following factors are taken into account:

• High-quality processing and materials
• Pre-installed electronics from well-known manufacturers
• Smart telemetry system for precise battery management
• Good spare parts supply
• Comprehensive support through Horizon Hobby

For beginners looking for a reliable and durable model, the price is quite justified. Advanced pilots will appreciate the thoughtful details and performance.

Tips, tricks and optimizations

Optimum battery selection

For the 64mm Viper Jet, experienced pilots recommend 4S LiPo batteries with 2200-3200mAh capacity. Batteries with higher C rate (at least 30C) provide more power for dynamic maneuver and vertical climbing.

An interesting option is batteries with lower weight but higher C rate for high-speed flights, while heavier batteries with higher capacity are suitable for longer, more moderate flights.

Priority optimization

The focal point has a decisive influence on the flight behaviour of the jet. The manufacturer’s focus is on providing a balanced flight picture. For more aggressive art flight maneuvers, a slightly forwardly displaced center of gravity can be advantageous, while a somewhat backwardly displaced center of gravity improves the slow flight properties.

Customize rudder rudder rudder

The recommended rudder rudders offer a good starting point. For personal preferences, however, these can be adapted:

• Reduced failures for more precise flying at high speeds
• Increased rugs for more spectacular art flight figures
• Use exponential function to reduce control sensitivity to the neutral position

Start optimization

The following technique is recommended for hand starts:

1. Keep aeroplane with a light engine
2. give gas to about 70%
3. With easy swing forward and easy to throw up
4. Only when the model flies stable, increase gas to full gas

When starting from the ground, the landing flaps should be easily extended to shorten the starting path.

Flight time optimization

To maximize flight time, the following measures may be helpful:

• Avoiding longer solid gas phases
• Use of Thermal and Winding
• Optimization of Trimming for Efficient Straight Flight
• Use of batteries with higher capacity (up to 3200mAh at 4S)

Community support and resources

An active community has developed around the E-flite Viper 64mm EDF Jet. In various forums and social media owners of the model exchange experiences, modifications and tips.

Particular emphasis should be given to:

• Official support pages of Horizon Hobby
• YouTube channels with flight videos and maintenance tips
• RC forums with specific discussions on the model
• Facebook groups for e-flite models

These resources provide valuable information for the owners and interested parties of the model and enable an exchange with experienced pilots.

Frequent questions and problems

Which recipient is recommended for the Viper Jet?

The E-flite Viper 64mm is delivered as a PNP version without receiver. A spectrum receiver, for example the AR631, is recommended for optimal use of the telemetry functions. This is compatible with the smart system of the built-in controller.

Other receivers can also be used, but then possibly not all telemetry functions are available.

Are upgrades of the engine or impeller sensible?

The factory-installed engine and the 11-sheet emitter are well matched and offer a balanced performance. Upgrades are possible but not necessarily necessary and can lead to increased power consumption.

Experienced pilots report good results with slightly modified impellets that improve efficiency. However, such modifications should only be carried out by experienced model builders.

How can I protect the model from damage when crashing?

In order to avoid damage to unwanted landings, the following measures are recommended:

• Reinforcement of hull nose with light GFK fabric
• Installation of protective films at particularly vulnerable areas
• Use of elastic adhesive tape on the wing edges

For beginners, the practice of start-ups and landings on soft ground is also advisable before flying to asphalt tracks.

What are the most common problems?

Users occasionally report the following challenges:

1. Balance problems with incorrectly placed battery
2. Overheating during prolonged operation at high outside temperatures
3. Damage to the chassis during landings on uneven terrain
4. Vibrations due to non-optimized impellers

Most of these problems can be avoided by careful maintenance and correct adjustment of the model.

Conclusion and recommendation for purchase

The E-flite Viper 64mm EDF Jet PNP (EFL07775) convinces with a successful combination of performance, quality and ease of use. It is suitable for beginners in the world of EDF jets as well as for experienced pilots looking for a reliable and versatile model.

Particular emphasis should be given to:

• Fast and easy assembly without adhesive and special tools
• The good and yet dynamic flight behaviour
• The high-quality processing and the sophisticated details
• The innovative smart telemetry system

The price is not low, but is justified by the quality and good support. For pilots who value a durable and reliable model, the compact E-flite jet jet is a clear purchase recommendation.

Those who are looking for their first EDF model or need a handy addition to the existing fleet will certainly have a lot of pleasure with this sophisticated electric-impeller jet from E-flite.