The ultimate analysis of the E-flite UMX WACO in yellow: A dream for RC pilots

The world of remote-controlled aircraft models is fascinating and versatile. Among the numerous options, the E-flite UMX WACO BNF Basic with AS3X and SAFE Select stands out in the yellow version (EFLU53550Y). This updated and improved model offers a combination of classic design and modern technology that will delight both beginners and experienced pilots. In this comprehensive article we look at all aspects of this remarkable aircraft and give valuable insights for potential buyers.

Technical data and specifications

The yellow WACO model by E-flite presents itself with impressive technical characteristics that make it a versatile performer:

The yellow UMX WACO is characterized by its advanced design, which results in a light yet robust aircraft. The control unit comprises an electronic controller (ESC) and a spectrum receiver that transmits real-time telemetry data to the aeronautical battery voltage to a compatible spectrum of AirWare equipped transmitters.

Customer experiences and reviews

The reactions of the pilots who have acquired the yellow double-decker model are predominantly positive. Here is an overview of the most common feedback:

Flight behaviour

Pilots particularly praise the stable flight behavior of the yellow WACO model. AS3X technology is appreciated for its ability to balance turbulence and give the aircraft a sense of size and stability. Many users report that the model can be easily controlled even in light winds - a remarkable advantage for an ultralight aircraft.

The optionally switchable SAFE Select function receives positive reviews especially from beginners. They appreciate automatic self-stabilization, which allows to learn flying with less stress. Advanced pilots, on the other hand, enjoy the possibility to switch between the stability-supported SAFE mode and the more responsive AS3X mode.

Processing quality

The opinions are shared with regard to the construction quality of the yellow double-decker. Many customers praise the careful processing and the quality of the materials used, especially given the price point. The completely painted yellow version is praised for its detail accuracy and scale look.

However, some users point out that the EPS material, although lightweight and durable, can be damaged in hard landings or crashes. However, this is a common feature of ultralight aircraft and not a specific problem of the E-flite model.

Test results and flight performance

Flight characteristics

In various tests, the yellow double-decker model of E-flite has consistently received good grades for its flight characteristics. The updated brushless external rotor motor offers impressive performance, especially when operated with a 3S 300mAh LiPo battery. The gradient is noticeable, and the model can easily perform vertical maneuvers.

The stability support by AS3X is given special praise for its ability to improve flight behavior in windy conditions. Testers often notice that the model feels like a significantly larger aircraft - a compliment for the effectiveness of stability technology.

Flight time

With a 2S 280mAh battery, pilots can typically expect flight times of 5-7 minutes, depending on the flight style. When using a 3S 300mAh battery, the flight time remains similar, but with significantly more power and vertical gradient. Many experienced pilots recommend buying several batteries to extend the flight time without having to wait for longer charging times.

Range and reliability

The built-in receiver technology provides a reliable connection to compatible spectrum transmitters. The range is more than sufficient for a model of this size, and connection terminations are rare when a properly functioning transmitter is used.

Material quality and durability

The yellow WACO model is made of high-quality EPS material that offers a good compromise between weight and durability. The completely lacquered yellow version not only gives the model an authentic look, but also offers a certain protection for the underlying material.

The electronic components, including the brushless motor, controller and receiver, are of good quality and comply with the standard that can be expected from E-flite products. The servos are miniaturized, yet precise and responsive.

For normal use and careful handling, the model should have a good life. However, as with all ultralight aircraft, caution is required, as hard landings or crashes can cause damage.

Transportability and Storage

One of the outstanding features of the yellow double-decker is its compact size, which considerably facilitates transport. With a span of 550 mm and a weight of only 124 g, the model can easily be transported in a special transport box or even in a large backpack.

For storage, many users recommend a protective box to avoid damage to the more sensitive parts such as the support surfaces and the chassis. Since the model is completely preassembled, there is no need for disassembly before transport or storage, which is another advantage.

Spare parts supply

The availability of spare parts is an important factor in the decision for a model aircraft. As a product of Horizon Hobby, the yellow E-flite WACO model enjoys excellent spare parts supply. Most common parts such as propellers, motors, servos and control elements are easily available and are usually delivered quickly.

In addition, many hobby shops and online retailers offer a wide range of accessories and upgrades for the model. This allows pilots to personalize their aircraft or improve certain components according to their preferences.

Target group and application possibilities

The yellow WACO model of E-flite is aimed at different groups of RC pilots:

Beginners with some experience

Thanks to the SAFE Select technology, the model is suitable for beginners who have already gained first experience with RC aircraft. The self-stabilizing function facilitates learning complex maneuvers and provides a safety net for unexpected situations.

Advanced and experienced pilots

The ability to switch between the SAFE mode and the pure AS3X mode makes the model also attractive for experienced pilots. In AS3X mode, the aircraft offers the responsiveness and precision required for more demanding flight maneuvers.

indoor and outdoor aircraft

With its lightweight design and UMX size (Ultra-Micro-X), the yellow double-decker model is suitable for indoor flights in large rooms such as gymnasiums and outdoor flights in quiet weather conditions. This versatility makes it an excellent choice for pilots who want to fly in different environments.

Scale-lovers

The authentic appearance of the yellow WACO model, especially in the fully painted version, makes it attractive for lovers of scale models. The detail accuracy and the classic double-decker design are appreciated by enthusiasts of historic aircraft.

Construction and installation

Assembly time

As a Bind-N-Fly basic model, the yellow E-flite WACO comes 100% pre-assembled from the packaging. The only steps required before the first flight are:

1. Uploading the flight battery
2. Binding the receiver with a compatible transmitter
3. Inserting the battery and fastening with the included Velcro
4. performing a check

These steps typically take less than 30 minutes, provided that the battery is already charged and the pilot is familiar with the binding process.

User manual

The user manual of the model is described by most users as clear and comprehensive. It contains detailed information about the binding process, the setup of the transmitter, the flight modes and the basic maintenance. The explanations about the SAFE Select technology and the configuration of the mode switch on the transmitter are particularly helpful.

Some users note that the instructions can be technical in some places, especially for absolute newcomers. However, there are numerous online resources and videos that can provide additional help.

Community support and online resources

The yellow double-decker model benefits from an active and helpful community of RC enthusiasts. There are several forums and social media groups that deal specifically with e-flite products and especially with the UMX series.

These communities offer valuable support in the form of:

• Tips and tricks for optimal flight settings
• Solutions for common problems
• Ideas for modifications and upgrades
• Flight engineering consulting for different weather conditions
• Videos of flights and maneuvers to inspiration

Horizon Hobby, the manufacturer of e-flite products, also offers excellent customer support and technical assistance for their products.

Alternative products in comparison

To make a sound purchasing decision, it is helpful to compare the yellow WACO model with similar products on the market.

E-flite UMX WACO (white version)

The white version of the same model (EFLU53550) offers identical technical specifications and performances as the yellow version. The main difference lies in weight and appearance:

• The white version is lighter because it is not completely painted
• The lighter weight can lead to a slightly longer flight time
• The yellow version offers an authentic scale appearance

Hobbyzone Sport Cub S 2

An alternative model for beginners with similar size:

• A little easier handling for absolute beginners
• Less scale appearance than the WACO model
• Not so versatile in terms of advanced flight maneuvers
• Similar price range

Flyzone Micro Nieuport 17

Another micro-format double-decker:

• Similar historical appearance
• Less advanced stability technology
• Often somewhat cheaper in price
• Not so powerful with 3S batteries

FMS 850mm P-51 Mustang

A slightly larger model for those who want more size:

• Larger span (850mm)
• Better visibility at distance
• Higher weight, therefore not suitable for indoor flights
• Higher price

Compared to these alternatives, the yellow E-flite UMX WACO offers a balanced combination of beginner friendliness, advanced features, scale appearance and versatility.

Value for money

The yellow WACO model is positioned in the middle to higher price range for ultra-micro aircraft. In view of the functions and technologies offered, most buyers consider it to be reasonably priced.

Factors contributing to the value of the model:

• High-quality construction and materials
• Advanced AS3X and SAFE Select technologies
• Brushless external rotor motor with 2S/3S compatibility
• 100% preassembled condition (Bind-N-Fly)
• Detailed scale appearance
• Real telemetry functions

When considering the total value, it should be taken into account that additional investments in several batteries and possibly a charger may be required if the buyer does not yet have them. Nevertheless, the model offers an excellent value for money, especially for pilots looking for a versatile aircraft that is suitable for both beginners and advanced.

Tips, tricks and optimizations

Optimized settings for the yellow E-flite model

For an optimal flight experience with the yellow WACO, experienced pilots have the following recommendations:

1. Customize Expo settings: Many pilots recommend increasing the Expo settings on the transmitter (approximately 30-40% for cross-rudders and altimeters) in order to achieve a softer response to the center.

2. Check focus: The focus (CG) should be carefully checked and, if necessary, adjusted by moving the battery. A slightly head-loaded model can lead to more stable flight behavior.

3. Battery management: For longer flight times and better performance:

   • Keep multiple batteries ready and switch between flights
   • When using 3S batteries more cautiously handle the gas
   • Remove the battery after each flight to extend the service life of the electronics

4. Propeller upgrades: Some pilots report improved flight characteristics with slightly modified propellers. A well balanced propeller can reduce vibrations and improve smooth running.

5. Maintenance of the distractions: Regular check and, if necessary, resetting the rudder steering can improve the precision of the control and avoid unwanted "game" in the rudders.

Weather-related adjustments

The yellow double-decker model can be flown in different weather conditions, but some adjustments can help:

1. Windy conditions:

   • Fly in SAFE mode for additional stability
   • Increase flight speed easily to reduce wind influences
   • Use larger tax cuts to better balance wind blows

2. Cold temperatures:

   • Keep batteries warm before the flight (e.g. in the bag)
   • Flying with the knowledge that cold batteries may not provide full performance
   • Reduce flight time somewhat to avoid overloading of batteries

3. Hot temperatures:

   • Cooling electronics between flights
   • Do not store batteries in direct sunlight
   • Monitor flight time, as electronic components can be more susceptible to overheating during heat

Frequent questions and problems

Frequent User Questions

Q: Can I fly the yellow WACO model as an absolute novice?A: Although the model has the SAFE Select technology that facilitates flying, it is recommended that pilots have collected at least basic experiences with simpler models. The double-decker configuration requires a little more attention when flying than a typical training aircraft with high wings.

Q: Which transmitters are compatible with the model?A: The yellow WACO model is compatible with all spectrum DSMX/DSM2 compatible transmitters with at least 5 channels. This includes transmitters such as DX6e, DX8e, DX6 G2/3, DX8 G2, DX9, NX6 to NX20, iX12 to iX20 and others.

Q: How long does it take to load the battery completely?A: The charging time depends on the charger used and the battery capacity, but is typically 30-60 minutes for a 2S 280mAh or 3S 300mAh LiPo battery with a high quality charger.

Q: Can I fly the model in a small garden?A: Although the model is compact, it still needs an appropriate space for maneuvering. A small garden could be sufficient if it is free from obstacles and no strong winds prevail. For beginners, however, a larger open area is recommended.

Frequent problems and solutions

Problem: Model does not react to tax inputsSolutions:

• Check whether the transmitter is switched on and correctly bound
• Ensure that the battery is charged and properly connected
• Reset the receiver by removing and resetting the battery
• Check whether the servos function properly and the control linkages are correctly connected

Problem: unstable flight behaviour or driftSolutions:

• calibrate control and adjust trimming
• Check and customize the focus
• Ensure that no rows are blocked or distorted
• Reset AS3X system by removing and reusing the battery

Problem: Shorter flight time than expectedSolutions:

• Check battery and make sure it is fully charged
• Check if the propeller is damaged as this can lead to inefficient flight
• Adapt flight style – aggressive flying and frequent full-gas phases significantly reduce flight time
• Considering older batteries to replace them as LiPo batteries lose capacity over time

Problem: Engine does not start or runs irregularlySolutions:

• Check battery connection and ensure that it is clean and firm
• Check propellers for damages or obstacles
• Check engine connections for loose connections
• Reset or contact Support for persistent problems

Conclusion and recommendation for purchase

The yellow E-flite UMX WACO BNF Basic with AS3X and SAFE Select is an excellent choice for RC pilots who are looking for a versatile, good-looking and powerful Ultra Micro aircraft. The combination of classic double-decker design and modern flight technology makes it a unique offer in the current market.

The strengths of the model are in its versatility (indoor and outdoor use), advanced stability technology and authentic appearance. The pre-assembled state and the Bind-N-Fly functionality make it particularly attractive for pilots who want to get into the air quickly without having to deal with complex assembly.

For whom is this yellow WACO model particularly suitable?

• Pilots with some experience seeking a more stable, more advanced model
• Advanced pilots who want a versatile aircraft for different environments
• Scale enthusiasts who appreciate the classic double-decker design
• RC pilots who value modern flight technology such as AS3X and SAFE Select

In view of its quality, features and versatility, the E-flite yellow double-decker model offers an excellent value for money and will provide the most buyers years of flight fun.