E-flite UMX B-25 Mitchell BNF Basic with AS3X technology: The ultimate guide for model flight enthusiasts

As a passionate RC pilot, you might be looking for a detailed model aircraft with excellent flight characteristics and historical background. The ultra-light micromodel B-25 Mitchell from E-flite could be exactly what you are looking for. In this comprehensive purchaser you will learn all the information about this impressive model aircraft with the innovative AS3X technology.

Technical specifications and product details

The BNF Basic Mikrojet convinces with its true scale replica of the historic bomber and offers modern flight technology. Here you can find the most important technical data at a glance:

The ultra-light Mitchell model is a perfect replica of the legendary B-25 bomber, famous by the Doolittle raid in World War II. The true-to-scale design impresses with numerous details such as true-to-origin armoring, triple-perpeller and authentic colouring that make the model a real eye-catcher.

Flight properties and AS3X technology

The revolutionary flight stabilization

The heart of the compact Mitchell bomber is undoubtedly the integrated AS3X system (Artificial Stabilization - 3-Axis). This technology gives the model an impressive flight behaviour that convinces even in adverse conditions:

• Improved stability: The 3-axis gyro stabilization automatically detects and compensates for turbulence and wind blows
• Natural feeling of flight: significantly reduces the working load of the pilot
• Precise control: Enables true-scale flight behavior despite microformat

The AS3X technology integrated in the spectrum of 6-channel ultralight receivers ensures an incredibly gentle feeling of flight. The combination of 3-axis sensors with specially adapted flight control software compensates for the effects of wind and turbulence.

Comprehensive control options

The Ultra-Micro B-25 offers complete proportional control with:

• Functional double side wheels
• Steerable Bugrad for precise rolling on the ground
• Removable chassis for simulating retracted landing flaps
• Double motorization for authentic flight behaviour

The four control channels allow a realistic control of the model, which brings joy to both beginners and experienced pilots.

Customer reviews and reviews

What pilots say about the Mini Mitchell

The feedback from model flyers who purchased the UMX B-25 Mitchell is mostly positive. Many customers particularly appreciate:

• Flight behaviour: "The AS3X technology makes flying fun even in light winds"
• Detailling: "Unbelievable how many true-scale details are stuck in this micromodel"
• Immediate: "Trotz des Zweimotorens-Design surprisingly good-natured to fly"

Critical notes refer mainly to:

• Limited flight time due to small battery capacity
• Limited availability of spare parts for intensive use
• Occasionally problems with engine power in older batteries

The average rating is 4.5 out of 5 stars, reflecting the high satisfaction of the buyers.

Flight performance and practical experience

Flight times and performance

With the recommended 300mAh 1S 3.7V 25C LiPo battery, pilots can expect the following performance data:

• Flight time: 5-7 minutes depending on flight style
• Range: Up to 200 meters of sight flight
• Increased power: Moderate rise rate, accurate acceleration
• Speed: Pleasant speed for round flights and light art flight maneuver

If the maximum recommended 500mAh battery is used, the flight time is extended to up to 10 minutes, but with a slightly reduced gradient due to the higher weight.

Material quality and durability

The construction of the UMX B-25 consists mainly of lightweight but resistant foam with strategic reinforcements at stressed areas:

• hull and wings: High quality EPO foam with good repairability
• Engine mounts: Reinforced construction for secure hold
• Suspension: Removable and flexible to capture smaller landing impacts
• Propeller: Scale-to-scale triple-perpeller made of flexible material

For normal use and gentle landings, the life of the model is noticeable. Most pilots report months of trouble-free operation.

Transport and Logistics

Transport capacity

A great advantage of the ultra-light micromodel is its excellent transport capability:

• Compact dimensions: Fits in almost any model aircraft bag
• Low weight: Under 100 grams without battery
• Plug-in support surfaces: Enable space-saving transport
• Removable parts: suspension can be disassembled for safe transport

This makes the UMX B-25 an ideal companion for spontaneous flight trips or trips where larger models would be impractical.

Spare parts supply and support

Availability of spare parts

The supply of spare parts for the E-flite Ultra Micro model is as follows:

• Standard components: Engines, servos and electronics are available as spare parts
• Structural parts: hull, supporting surfaces and guides can be reordered as individual parts
• Availability: Good availability at specialized RC dealers and online shops
• Delivery times: Usually 1-3 working days within Germany

Most pilots report that critical spare parts such as propellers and engines are easy to obtain, while specific structural parts may occasionally have longer delivery times.

Target group and requirements

Who is the UMX B-25 Mitchell suitable for?

The ultra-light bomber is aimed at different groups of model flyers:

• Advanced Beginners: With some experience in single-engine models ideal as the first two-engine aircraft
• Experienced pilots: As a detailed collector's item with excellent flight characteristics
• History interested: The historical significance of the B-25 Mitchell bomber
• Indoor pilots: Perfect for indoor flight thanks to low size and AS3X stabilization

Absolute flight newbies should first gain experience with simpler models before they move to the twin engine bomber.

Construction and preparation

Assembly and commissioning

A great advantage of the BNF Basic model is the almost complete preassembly. The assembly is limited to a few simple steps:

1. Unpack and check all components
2. charging the LiPo battery with suitable charger
3. Binding the model with the transmitter (once required)
4. Mounting the chassis
5. Optional: Attach the included stickers for individual design

The entire preparation time is about 30-60 minutes, most of the time being required for charging the battery. The included guide is well structured and contains detailed illustrations for each step.

Community support and resources

Online community and assistance

An active community has developed around the popular micromodel:

• Forums: Special threads in RC forums with tips and exchange of experiences
• Video tutorials: Numerous YouTube videos on flight, maintenance and modifications
• Social Media: Facebook groups and Instagram accounts with focus on UMX models
• Manufacturer support: Good technical support through Horizon Hobby

These resources are particularly valuable for newcomers who want to benefit from the experience of other pilots.

Comparison with alternative products

How does the UMX B-25 compete?

To better assess the positioning of the E-flite ultralight model, it is worth looking at alternative models in the similar segment:

In a direct comparison, the Ultra-Micro B-25 convinces by its exceptional combination of historical design, modern stabilization technology and easy handling.

Value for money

Does the investment pay?

With a typical sales price between 130-160 Euro, the E-flite UMX model is positioned in the middle price segment for ultra-micro aircraft. The following factors are relevant for the assessment:

• Includes components: Fully assembled model with receivers, motors, servos and regulators
• AS3X technology: Premium feature that can only be found in more expensive models
• Scale detailing: Above average for this size class
• Longevity: Good service life with careful handling

The overall assessment of the price-performance ratio is positive, especially when one takes into account the added value of AS3X technology and the excellent detailing.

Tips, tricks and optimizations

How to get the most out of your UMX B-25

Battery optimization

• Battery position: Experiment with the exact positioning of the battery to optimally adjust the focus
• Battery management: Use multiple batteries and a multiple charger for longer flight sessions
• Battery care: Store LiPo batteries at about 3.8V per cell for maximum service life

Flight techniques

• Start: Gentle gas and easy to pull; with two-engines pay particular attention to straight alignment
• Landing: Long, flat approaches with reduced gas allow gentle landings
• Currencies: Due to double-engineering, give some more side wheels in curves than with single-engine models

Modifications and improvements

• LED lighting: Micro-LEDs can be retrofitted for night flights or better visibility
• Engine upgrade: More efficient motors can improve climbing performance
• Surface treatment: Easy sealing of the foam surface improves life and appearance

Weather-related adjustments

• Windy conditions: Keep higher speed and fly flatter curves
• indoor flight: Program gas limit at the transmitter to prevent too fast flights in limited spaces
• Thermal conditions: The lightweight construction can also use Thermik - pay attention to unexpected rise

Frequent questions and problems with solutions

The main concerns of users

"My model does not respond to the transmitter"

Problem: After switching on, no connection is established between transmitter and receiver.

Solution:

1. Check if your transmitter is DSM2/DSMX compatible
2. Run the binding process again by (use binding plugs, turn on model, start transmitter in connect mode)
3. Check battery charging state
4. Pay attention to sufficient distance to other electronic devices

"One of the engines is not running or irregular"

Problem: Uneven thrust through engine problems.

Solution:

1. Test propellers for damage and free rotability
2. Control motor connections and possibly re-sold
3. Check and carefully clean engines for pollution
4. Remaining problems replacing engine (8.5mm Brushed motors are standardized)

"The model is difficult to control and flies unstable"

Problem: Despite AS3X unrestrained flight behaviour.

Solution:

1. Check focus and, if necessary, correct by battery positioning
2. Check rudder deflections for symmetrical adjustment
3. Increase Expo setting at the transmitter (20-30% for beginners)
4. Ensure that all moving parts are easy to move

"The flight time is very short"

Problem: Less than 4 minutes flight time per battery charge.

Solution:

1. Pay attention to fully charged battery (4.2V at 1S LiPo)
2. Switch to the recommended 300-500mAh 25C LiPo battery
3. Adapt flight style: Less full gas, more slides
4. Check propellers for damages that could cause additional resistance

"The decoration dissolves or leaves"

Problem: The surface or stickers show signs of wear.

Solution:

1. Fix sticker with clear spray paint (very thin apply)
2. Transport model in padded bag
3. Protect against direct sunlight during storage
4. Use replacement decorbs included in delivery

Conclusion and recommendation for purchase

The E-flite UMX B-25 Mitchell with AS3X technology combines historical design with modern flight technology in a compact package. Thanks to the excellent stabilization, detailed design and easy handling, the model is especially suitable for advanced beginners and experienced pilots who are looking for a reliable two-engine warbird for versatile applications.

Despite the limited flight time of 5-10 minutes, the price-performance ratio convinces by high-quality processing, finished assembly and innovative AS3X technology. The possibility to present various historical versions of the famous B-25 bomber with the included decorative sheet is particularly noteworthy.

For whom the purchase is worth:

• Pilots interested in historic aircraft
• RC enthusiasts looking for a high quality second model
• Indoor airliner with limited space
• Collectors of true scale aircraft models

The Ultra-Micro B-25 Mitchell offers an exceptional flight experience in compact form and is an enrichment for each model flight collection.