Welcome to the home of the OBLIVION 300+ remote control helicopter. This is a non-commercial website about a custom-built micro helicopter with high performance 3D flight capabilities. NOTE: This site is work in progress and the helicopter is still at design stage!

UPDATES

In turn of stretching the Oblivion, Andy came up with a completely redesigned tail gearbox that improves the helicopter's performance and longevity in several ways:

By changing the design to a single piece gearbox with a self centering end cover (integral with the fin, holds one of the tail shaft bearings), we can now use a single screw running through the boom to hold the gearbox in place. Way easier and more economical than zip ties! Another advantage of this design is prolonged bearing life, as there is no way for the bearings to slide out of alignment anymore. It's easier to maintain too as you can simply remove three screws to disassemble the entire thing!

The new tail gearbox will give you a weight saving of about 3g over the old one, which actually is a lot for such a small tail unit. By removing this excess weight so far out from the helicopter's center of mass, we could reduce the pitch and yaw angular moment of inertia by quite a bit. This means it's easier for the rotors to accelerate and stop the helicopter's rotation, leading to crisper and more precise pitch and yaw response.

The fin is now reinforced by a 2mm carbon rod at the trailing edge. This makes it lighter and completely prevents the tail from entering resonance. This makes the whole tail unit run smoother, uncritical to balance and way harder to break in a crash.

Overall, this new tail box improves the helicopter's maneuverability, durability and maintenance friendliness, reduces weight and bearing wear. We think it looks super cool too! ūüėČ

Let us know what you think!
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Let's take a dive into the working principle and design features of the new, dampened Oblivion head! The main goal here was to greatly reduce rotor vibration from cyclic inputs transferred to the helicopter, while at the same time giving you a cleaner, crisper, quicker and more precise control response than ever before.

The new hub allows for a theoretical teeter range of almost 13¬į before the spindle would hit the hub, way more than enough for any kind of flying style. The hub holds a total of four 4mm x 3mm 70¬į Shore O-rings for suspension of the spindle shaft. Those rings allow for a relatively soft teeter range of about 2¬į for smooth, clean and precise control around center. This is the usual range you'll use when flying sport, big air and smooth 3D- the model will stay dead calm during all that!

Going beyond this 2¬į range, which will typically happen when throwing the model around a bit harder, the dampening progressively stiffens up to give you an extremely direct and linear cyclic control feel, while delaying blade flutter and keeping vibration levels way lower than before.

Due to the nature of dampened rotor heads, we obviously switched to regular ball linkages as well. Those are now guided by two 3D printed washout arms. Those arms keep the swash on track precisely while remaining light weight and absolutely slop free. Compared to a regular washout arm setup, this greatly reduces the rotor head's part count greatly as well!

This completely reimagined dampening setup allows for one rotor head that fits all flying styles, from ultra low rpm to smack 3D. We've been flying this setup on three helicopters over the last couple months and were absolutely blown away by it!

Let us know what you think!
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Heyho everyone!

Get ready for the v1.6 update: Completely redesigned main rotor- and tail system to get maximum performance out of up to 285mm main rotor blades! All STL files available now at www.oblivion-heli.com/.

The new, dampened rotor head incorporates four large 4mm x 3mm O-rings for minimum vibration transfer and maximum control precision. It's crisper than ever before!

The new tail case is substantially lighter, easier to align and less prone to resonance, the perfect match for the light and nimble OBLIVION 300+.

Also new are the combo downloads which will reduce the manufacturing cost by combining multiple parts into one.

Here's a video of Jonas putting the new parts through their paces:
www.youtube.com/watch?v=t-KEqr1Li1A

We will post more details on each of the above mentions over the next couple days.

Stay tuned!
Christian, Jonas & Andy
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Last Sunday we did a few test flights with different setups. I think we have never been flying with such high RPM, but the performance was pretty impressive:

www.youtube.com/watch?v=06L6CxI-uFY
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Hey guys, check out how the new SAB 280 rotor blades perform on a modified Oblivion 300+:
youtu.be/fiDGgebqqGs

The battery pack just hit the 200 cycles... ūüėČ
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INTRODUCTION

A few things had to come together for this project to turn into reality. First off, noticing the precision, strength and weight of SLS (Selective Laser Sintering) plastic. When Andy Rummer first showed me a piece of this material, it immediately became clear to me that it has everything to perform great in rc-helicopters. It is all a matter of proper dimensioning. Secondly, my passion for the 300 size since 13 years and the conviction that 5.000 RPM headspeed is not the solution. Discload matters. Finally, the thought of combining all best practices i have learned and seen in rc-helicopters into one model of this forgotten class – and making it easily accessible to everyone: The Oblivion 300+.

In more detail: The design goal is a 300ish size helicopter that would lock in nicely on pitch and provides full 3D capabilities Рall at 2.200 RPM. This results in less mechanical wear, lower noise level and light-footed flight characteristics. You will dare more with the Oblivion than you will with other models. Furthermore, this is a non-commercial project. Which means all drawings and 3D files will be publicly available in STL format. Practically anyone can send them off to Shapeways.com or other SLS services for printing which has a low price tag. Please note that regular 3D printers will most likely not produce parts that will work for this purpose, simply because of weight and tensile strength.

Key design aspects are: 140¬į heavy duty swashplate for equal travel of each servo. More important in the micro-helicopter domain, since the choice of high-speed servos is pretty limited. Three-point guidance for main shaft to allow for maximum frame strength and least amount of torsion towards the tail boom. 12mm carbon tail boom which essentially¬†eliminates the need for additional boom support.¬†Mono-frame –¬†mounting a swashplate guide? 10 or more parts to build a frame? Not needed, since the frame and all struts are a¬†single piece of plastic. 17 bearings, including thrust bearings for main rotor. Low disc-load of around 1.36kg/m2.

STATUS QUO

I am still at the design stage, and only a few prototype helicopters exist today. The core rotor system also works on a different chassis and performs flawlessly. I am going to post updates on here as we move ahead with development.

CREDIT

I would like to thank Jonas Wackershauser, Andy Rummer, Dennis Meyer & Ralf Bartikowski for their¬†support and contributions to this project. Thumbs up! ūüėČ

ABOUT ME

My name is Christian Ruck and i have been flying rc-helicopters and planes for quite some time now. I also run www.microheli.net, a website especially for micro helicopters. I am not a team pilot, tied to or biased by any particular manufacturer. The Oblivion is a personal and non-commercial project, essentially about finally building the model I feel is missing in the market.

ME

Limitation of liability for internal content

The content of my website has been compiled with meticulous care and to the best of my knowledge. However, I cannot assume any liability for the up-to-dateness, completeness or accuracy of any of the pages.

Pursuant to section 7, para. 1 of the TMG (Telemediengesetz ‚Äď Tele Media Act by German law), I as service provider am liable for my own content on these pages in accordance with general laws. However, pursuant to sections 8 to 10 of the TMG, I as service providers am not under obligation to monitor external information provided or stored on my website. Once I have become aware of a specific infringement of the law, I will immediately remove the content in question. Any liability concerning this matter can only be assumed from the point in time at which the infringement becomes known to me.

Limitation of liability for external links

My website may contain links to the websites of third parties (‚Äúexternal links‚ÄĚ). As the content of these websites is not under my control, I cannot assume any liability for such external content. In all cases, the provider of information of the linked websites is liable for the content and accuracy of the information provided. At the point in time when the links were placed, no infringements of the law were recognizable to me. As soon as an infringement of the law becomes known to me, I will immediately remove the link in question.

General

Model helicopters are not toys. Building and flying the Oblivion requires a good amount of experience. Always consider safety first!

Furthermore, I will not make your helicopter fly. I can not provide instant support on inquiries, please use the forum on www.microheliforum.com for general requests. I will however try and answer requests that reach me via E-Mail as soon as I can. Thanks for understanding.

Christian Ruck, catch me via e-mail on christian@microheli.net or via phone on +491638119811