Antlers

Archiv*AN TLERSPre viewProd uct De sign Oct 2013

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ANTLERS AN AIRCRAFT

Soft Structure, Smooth Airfoil archiv*

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Abstract 2013 Spring-Summer joint project in collaboration with Nonami Lab. contribution: measurement of current Mini Surveyor model and its modelling for drawings that can be a rough sketch for everyone else, sketches, 3D model studies, 3D modelling for my personal model, rendering for the model.

Pre-project Before the project, the consortium-leading laboratory Nonami Lab in Chiba University (URL http://mec2.tm.chiba-u.jp/~nonami/)used conventional drone models such as hexa-, quad-, or dodecacopters on the market. Their requirement was that we redesign a hexacopter based on the hexacopter manufactured by two Japanese drone companies. Being built mainly for hobby use, those hexacopters were fragile, not very well balanced, spaghetti corded, mildly ugly drones as you see below.

Critique “I have no idea what this is but it's so sweet!” – Obara Suzuka.

“It’s interesting that none of the sketches Matsui drawn contain any chance of going mass-production” - Prof Watanabe Makoto, in an interim meeting.

“How are you going to produce this? ...(I responded ‘aluminium maybe’) ... well this isn’t good.” – Prof Watanabe Makoto, as a critique to the honeycomb idea.

“Cool. Looks like Starmie[a pokemon]” - Kido Jiro, a cartoonist.

“Starmie” - Ishihara Aiko.

Hi!> “Cool. The 3D printer should be used this way.” – Nakamori Daiki.

“Cool. Exhibit this in the Techno frontier exhibition.” – Ying Zhong.

“I bet your interest is satisfied with this drawing. I know it.”– Soga Tasuku, project leader, when I offered the raw 3D drawing of the base hexacopter model.

“Oh...” – Nishimura Takashi, Product Design Lab. “You did this? Eh? This one is way cooler. Why didn’t you exhibit this one instead of the others?” – Fuwa Takeo, Sharp designer, colleague, a fellow alumni, after examining the other propositions.

Required Features: _1. water-proof _2. more stable landing legs

Desirable Features: *1. propeller guards *2. better aerodynamics, lessair resistance *3. accessibility for the central wires *4. easier component (e.g. broken arm) replacement *5. front and the rear being distinguishable

My Ideas: +1. softer structure +2. tougher structure

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Traced Drawing. Original Technical drawing generated with Rhinoceros. Pen(Lamy2000), Ink(Pelikan 4004 Black) Copic C1 C3 C5 C8 on A3 Paper

Traced Drawing. Original Technical drawing generated with Rhinoceros. Pen(Lamy2000), Ink(Pelikan 4004 Black) Copic C1 C3 on Paper

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MODELLING PROCESS In this section I would like to show modelling process while sketching (Process Phase2), what I was thinking and how those ideal thoughts reached the conclusion.

1.

Central enclosure forming process

Antlers first started off with a sphere: 1.1–

the strongest in structure, the most primitive geometric shape for a thing to hover in a place.

Hexacopter, however, also flies. It soars up into as high as 50 meters. It also has to roam around the sky in order to take pictures, to measure radiation dose, or to crop-dust. It also has to cope with the strong side wind to stay in a place, and that is why most hexacopters are flattened. The Antlers is also flattened to more or less oval shape, 1.2–

but bulged more on sunny side, 1.3–

3.

Legs

The conventional legs were too close each other, resulting in less tolerant bank angle for abnormal landing shown below:

The more the legs spread off, the better for landing stability:

as shown below:

expecting for it to contribute to robustness of the aircraft against side wind, causing the lift as the law of Bernoulli explains.

4.

2.

Configuration process: blended arm body

Arms

While the original arms were just straight horizontal bars, I did not think this was the way to go because: a. the rotor planes were too high compared to the centre of gravity of the aircraft.

To configure all these thoroughly newly designed elements together, Antlers formed into one indivisible smoothly blended airfoil body:

http://en.wikipedia.org/wiki/Blended_wing_body

The heaviest equipments were the batteries(500g each), and their configuration was fixed to the bottom of the body. That is because: a. to protect the li-po batteries, the dangerous explosives, from raindrops b. to stabilize the aircraft. The centre of gravity surely does have to be lower than the rotor planes, if not too far away.

The arms were formed into cross-oval shape, to achieve both flexibility and rigidity at the same time.

After finishing modelling process I came across Panasonic POS bicycle technology called F.P Select: http://cycle.panasonic.jp/products/pos/technology/?frm=top

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Designprocess Phase1, Survey.

Designprocess Phase2, Study, Handdrawn Sketch..

A: slanted legs for wider ground contact area, + camber for arms. cons: worse weight balance, legs tend to be too long to end up sacrificing its stability during flight and landing, prone to flown away by winds

A’: drastically slanted legs + very fine antenna-shaped outshot parachute

B’: more detail on the central hex. cons: legs=arms too thin. landing with arms always risks

(B+A)’: elimintated the feature of landing with arms from B, eliminated camber from A and then combined those two ideas into one.

B: embowed legs to carry heavy battery and camera without compromising its weight balance

B: amoeba-shaped thin model that stands with its six arms=legs.

C: masculine. less negative-camber than B, wider body hex, soft connections between the neighbor arms like fingers webbing

B’’: wider body hex, thicker legs

E: truss reinforced arms for tougher arms that can endure sudden crash. cons: no space for battery and camera

D: very wide, thin arms that are meshed to have stronger resitance against side wind.

Designprocess Phase3, Study in CAD.

Larger Surface Area for Landing with six legs.

Shorter, More Stable, Presumably Lighter than ever before.

F’ prototype B’’: wider body hex, thicker legs

a variation of Antlers (F’).

naked model

A’’

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Matsui Minoru Matsui Minoru

NOTICE OF PROPRIETARY PROPERTY:

13/7/20 13/7/20

THE INFORMATION CONTAINED HEREIN IS THE PROPRIETARY PROPERTY OF THE DRAF TER.

Designprocess Phase4, 3D Modelling.

Antlers Project Mini Surveyor 1

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Matsui Minoru Matsui Minoru

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NOTICE OF PROPRIETARY PROPERTY: THE INFORMATION CONTAINED HEREIN MAY BE THE PROPRIETARY PROPERTY OF MONTBLANC INTERNATIONAL GMbH. I DO NOT OWN COPYRIGHTS TO THE BASED FOUNTAIN MODEL.

A Montblanc 320[Classic] Fountain Pen

Cap and Body

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GE) Matsui Minoru Matsui Minoru

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NOTICE OF PROPRIETARY PROPERTY: THE INFORMATION CONTAINED HEREIN MAY BE THE PROPRIETARY PROPERTY OF MONTBLANC INTERNATIONAL GMbH. I DO NOT OWN COPYRIGHTS TO THE BASED FOUNTAIN MODEL.

A Montblanc 320[Classic] Fountain Pen

Cap and Body

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Designprocess Phase 5, 3D Renderings.

Designprocess Phase 6, 3D Print

Designprocess Phase 6-a, 3D Print Depouder

Designprocess Phase 6-b, Model Finishing: Bond+Polishing

Designprocess Phase 6-c, Assembly Designprocess Phase 6-d, Final Polishing...

Designprocess Phase 7, Printed Model Broken into Pieces... :( *cry*

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©2013 Fujita Tokimaru, DML

TechnoFrontier 2013 Tokyo Big Site July 17th – July 19th Consortium Exhibition

©2013 Daimon Yusuke, DML

©2013 Nonami Lab

©2013 Soga Tasuku, DML

©2013 Fujita Tokimaru, Yamaura Koji, DML

In TechnoFrontier, Nonami Lab demonstrated the actual hexacopter device in a large exhibition hall.

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