The ultimate buyer: E-flite UMX PT-17 BNF with AS3X technology

Are you looking for a high-quality Ultra Micro flight model with excellent flight characteristics? The compact art flight model of the renowned manufacturer E-flite could be exactly what you are looking for. In this comprehensive article we illuminate all the important aspects of this model aircraft and give you valuable information for your purchase decision.

Technical specifications and delivery

The ultra-light flight model convinces with its compact dimensions while impressive flight characteristics. Here you can find all important technical data at a glance:

Included are:

• Fully mounted ultralight BNF hull
• 150mAh 1S 3,7V 25C Li-Po battery
• USB 1S Li-Po battery charger

To fly, you also need:

• A 4+ channel transmitter with spectrum DSM2/DSMX 2.4GHz technology

Detailed product analysis

Processing quality and materials

The ultra-micro model of the classic double-decker impresses with its high-quality processing. The materials used are light, but still robust enough to survive smaller crashes without prejudice. The true-to-detail design with realistically simulated star motor, which was inspired by the original aircraft of Pat Hartness.

The built-in components such as the Ultra-Micro linear servos are perfectly adjusted on the factory and ensure precise control movements. The material quality exceeds most competing products in this price class and ensures a long life of the model.

Flight performance and AS3X technology

The outstanding feature of this model is undoubtedly integrated AS3X technology. This sophisticated system, built in the 6-channel ultramicro receiver, ensures remarkably stable flight characteristics. The technology works in the background and automatically neutralizes the effects of wind and turbulence by combining 3-axis sensors with specially adapted flight control software.

In practice, this means:

• Significantly reduced tax expense
• Rockproof control even in demanding maneuvers
• Precise trajectories even during slow flights
• flying feeling as with a much larger, perfectly matched model

The climbing performance of the small semi-trailer convinces even experienced pilots. Thanks to the efficient motor and the low weight, the model rises quickly and can still be controlled at a higher level.

Battery life and flight duration

With the included 150mAh 1S LiPo battery, flight times of 5-7 minutes are possible, depending on the flight style. With predominantly quiet cruises you can reach the upper limit while acrobatic maneuvers with high energy consumption shorten the flight time. Experienced users recommend the acquisition of multiple replacement batteries to extend the flight time at a time.

The supplied USB charger completely charges the battery in about 45-60 minutes. For shorter charging times, the investment in a high-quality charger with balancing function is recommended.

User experiences and reviews

The opinions of buyers of the compact double-decker are predominantly positive. The following aspects are particularly often praised:

Positive experiences

• Excellent flying properties: Many users are excited about the stability and precision of the flight that is made possible by AS3X technology.
• Easy handling: Despite its small size, the model is easy to control and also forgives smaller pilot errors.
• High accuracy: The scale design with realistic details is equally appreciated by collectors and flight enthusiasts.
• Robust and durable: With proper handling, users report an amazing longevity of the model.
• Low maintenance costs: The finished assembled construction hardly needs maintenance or adjustment work.

Critical aspects

• Spare parts costs: Some users complain about the relatively high cost of spare parts.
• Sensitivity for wind: Despite AS3X technology, it remains an ultra-micro model that comes to its limits with stronger wind.
• Short term: The limited battery life is often called a disadvantage, but is typical of this model class.

The overall ratings in various online shops and forums are on average 4.5 out of 5 stars, which underlines the high customer satisfaction.

Transport and storage

Thanks to its compact size, the small double-decker is ideal for transport. It fits easily into a medium-sized transport box or even into a padded bag. It is only important to protect the sensitive supporting surfaces and the guide mechanism from pressure.

For storage, experienced users recommend:

• Always remove batteries and store at about 3.8V (about 50% charge)
• Keep model in a dry, dust-free place
• Avoid direct sunlight to prevent discoloration
• Use a suitable suspension to avoid pressure points

Target group and entry barriers

The E-flite Ultra Micro Double Decker is aimed primarily at advanced beginners to experienced pilots. Absolute newcomers should first gain experiences with a simpler model or a flight simulator before moving to this model.

Overview of target groups:

• Advanced Beginners: Users with first flight experiences looking for a high quality model with stabilization system
• Scale-lovers: Collectors and enthusiasts who value a detailed model
• Indoor pilots: Due to its small size, the model is excellent for indoor flies
• Experienced pilots: As a second or third-party model for fast flight units

Since the model is already fully assembled, the assembly is limited to the insertion of the battery and the binding with the transmitter. This usually takes no more than 15 minutes, even for beginners.

Spare parts supply and support

The spare part supply for the E-flite UMX PT-17 is good, though not perfect. Durable wear parts such as propellers, batteries and servos are available in most model construction shops and online shops. More specific components such as the supporting surfaces or the fuselage can be ordered via the Horizon Hobby customer service.

The spare parts prices are in the middle segment, which is common for brand products of this quality stage. Frequently required spare parts are:

• Propeller
• Battery
• Engines
• Servos
• Small parts such as rod and rudder steering

Community support is particularly good in German-speaking and international model building forums. Here you can find numerous threads with tips and solutions for frequent problems as well as tuning suggestions.

Compared to competitors

To make your purchase decision easier, we compare the small semi-trailer with similar models from other manufacturers:

FMS PT-17 Micro Stearman

The FMS variant is slightly larger and heavier, but offers similar flight characteristics. Advantages are the cheaper price and the somewhat longer flight time. Disadvantages compared to the E-flite model are the lack of the AS3X system and the somewhat lower level of detail.

Dynam PT-17 Stearman

This model is significantly larger (1270mm span) and is therefore not suitable for indoor flights. It offers more stability in wind, but also requires more space to start and land. The processing quality is below the E-flite model, and the price is more attractive.

E-flin UMX Pitts S-1S

An alternative model from the same house with similar size and also AS3X technology. The main difference lies in flight behaviour: While the PT-17 flies rather humble and stable, the Pitts is more agile and more sporty. A good alternative for pilots seeking more art flight suitability.

In a direct comparison, the E-flite UMX PT-17 stands out thanks to its combination of detailed scale design, excellent flight performance thanks to AS3X technology and compact design. The somewhat higher price is justified by the superior quality and the sophisticated technical concept.

Value for money

With a market price of between 120 and 150 euros, the small semi-trailer is positioned in the upper price segment of the ultra-micro models. Given the quality offered, the sophisticated technology and the high-quality components, the price-performance ratio is nevertheless to be considered good.

Factors justifying the price:

• Patented AS3X Stabilization Technology
• High-quality processing and materials
• Spectacular scale design
• Completely ready-to-air model (except transmitter)
• Long life with proper use

For model builders who value quality and performance, the model represents a rewarding investment.

Tips, tricks and optimizations

Optimization of flight time

1. Battery upgrade: Invest in several high-quality 1S LiPo batteries with up to 200mAh capacity for longer flight times.
2. Efficient flying: Avoid excessive solid gas phases and use sliding and thermal.
3. Propeller optimization: A slightly modified propeller can increase efficiency.

Improving flight performance

1. Focus on fine tuning: Experiment with minimal changes in the focus for better performance.
2. Expo settings: Use the exponential function of your transmitter for softer control reactions.
3. Customize rudder rudder rudder: Reduce the rugs for beginners or increase them for more art flight suitability.

Maintenance and maintenance

1. Regular inspection: Check rudder steering and propellers before each flight.
2. Battery care: Never charge batteries in the hot state and store them at about 50% charge.
3. Cleaning: Remove dust and dirt with a soft brush or compressed air.
4. Storage: Keep the model in a dry place without direct sunlight.

Tuning and modifications

Experienced pilots have developed various modifications:

1. LED lighting: A discreet illumination not only improves the optics, but also the orientation in dawning flights.
2. Lightweight construction tuning: The weight can be further reduced by carefully removing non-structure-relevant components.
3. Engine upgrade: A more powerful motor can provide more power, but also requires adjustments to the controller and battery.

Frequent questions and solutions

"My model does not respond to the transmitter. What can I do?"

First check whether the battery is fully charged and correctly used. Make sure your transmitter is equipped with DSM2/DSMX technology and re-enter the binding process. In this case, you need to plug the binding plug into the connection provided for this purpose on the receiver before you turn on the model and then start the binding process on your transmitter.

"The flight time is shorter than specified. Is my battery defective?"

Shorter flight times can have different causes. Check if the propeller is damaged or can be easily turned. Also check whether all moving parts are smooth and do not grind rows. At cold temperatures, a reduced battery power is normal. After about 30-40 charging cycles, the capacity of LiPo batteries naturally decreases - a replacement could be necessary.

"My model moves to one side. How can I fix it?"

First you should check the mechanical trim: Are all rows in neutral position when the transmitter is in the middle position? If not, adjust the linkages. If this does not help, you can use the digital trim at the transmitter. Also note that a twisted hull or deformed wings can be causes after a crash.

"Can I fly the model as a beginner?"

Absolute beginners should first gain experience with a more stable training model or a simulator. With first basic knowledge, however, the PT-17 can be a good second model thanks to the AS3X system. Reduce the rudder beats for the first flights and fly at Windstille.

"Is the model suitable for outdoor use?"

Yes, the model can also be flown outside, but only with very little wind (maximum 5-8 km/h). AS3X technology helps to balance light turbulence, but with stronger wind, the model becomes quickly uncontrollable due to its low weight.

"What channels are compatible?"

All transmitters with spectrum DSM2/DSMX technology and at least 4 channels are compatible. Popular options are the spectrum DX6e, DX6, DX7, DX8 and DX9. Some transmitters from other manufacturers with spectrum module can also be used.

Conclusion: For whom is the E-flite UMX PT-17 suitable?

The E-flite UMX PT-17 BNF with AS3X technology is an excellent model aircraft for advanced beginners and experienced pilots who are looking for a high-quality Ultra Micro model with excellent flight characteristics. The model is particularly impressed by its AS3X stabilization technology, which ensures an impressive flying experience even with light winds.

The combination of detailed scale design, compact size and high-quality workmanship makes this double decker a versatile companion that makes a good figure both in the hall and in quiet outdoor conditions.

The somewhat higher price is justified by the quality offered and the sophisticated technology. Who is willing to invest in a premium product is rewarded with long-lasting pleasure. However, for price-conscious beginners or pilots who want to fly mainly on wind, the alternatives presented could be the better choice.

In the end, this small semi-trailer offers an authentic pocket-sized flight experience - with a stability and precision that one would hardly expect from a model of this size class.