great flying ! it is nice to see that butterfly wings may be connected actually. what is the point to position the servos in this angle? -- is it for implicit root chord angle, or for moving vortexes away from the wing tips and having a virtually larger wing span ? how do you manage to fly without mechanical help on the downstroke -- are you controlling the center of flapping amplitude during flight?

@y.takemura8488

6 жыл бұрын

The angle is attached to the mounting position of the servo to do direction control. By varying the center of amplitude of the blade in the left and right direction, the elevation angle of the blade and the blade angle on the tail side change, I think that direction control becomes possible. I do not really understand. Actually, I am mimicking Fest (eMotion Butterfli).

@d4ro

6 жыл бұрын

ahh true, thats why it can turn so nicely in 1:05. as well the more stream going to the side may help to change direction and be more stabilized.

✌👍🏻

翼の羽ばたき角度中心を下げて重心を前方に移動したのでしょうか？この形の羽ばたき機は、かなり重心を後ろにして上向きの力を作り、翼の羽ばたき中心を上にして下向きの力を作って釣り合わせないといけません。両方の力が強くて釣り合っていると安定して飛び、両方の力が弱いと不安定になり機敏な反応をします-風で下方に急激な回転をします。

@y.takemura8488

6 жыл бұрын

確かに、重心の位置はシビアです。今回翼端の面積を少し増やしたため、重心位置が前方になったと思います。 理論的にはよく解りませんが、Lipo位置を最前端に移動し、翼の移動角度を増やしたところ、比較的安定して飛行できるようになりました。ただし風には弱く、無風に近い状態でないとうまく飛びません。

@BZH07614

6 жыл бұрын

翼の羽ばたき角度を増やしたため、相対的に羽ばたき中心の位置が下がり、下へ向く力が減少したため、釣り合う重心位置が前方になったのでしょうか？それだと風に弱くなるかもしれません。蝶の羽ばたきはとても神秘的で不明なことが多く、鳥の羽ばたきのようにいきません。奥が深いです。タケムラさんのこの蝶をみて思い付き、私のButterfly20-5-2（９4ｃｍ）の後羽を逆V（この尾翼は操縦がとてもうまくできます）からV型にして前羽とほぼフラットにしてみたところ非常によく飛びました。これは本物の蝶の羽ばたきに近づきました。操縦もきちんとでき風にも強いようです。ありがとうございます。ところが小さなButterfly47（60ｃｍ）では全然だめで操縦ができません。なにが違うのかわかりません。現在、小さな蝶でさらに試行錯誤をしています。

@y.takemura8488

6 жыл бұрын

羽ばたき角度の最下位置はあまり変わっていません。全体的に上側角度を増やした感じです。 もしかすると、以前より後ろ重心だったのかもしれません。構造上、コントローラーを前につけると、Lipoを搭載する 位置が後方になってしまいます。先入観で重心位置は後方と思い込んで試行錯誤していたのかもしれません。 確かに、蝶の羽ばたき機は前例が少ないためよくわからないことばかりです。私も試行錯誤の連続です。

@BZH07614

6 жыл бұрын

タケムラさんの羽ばたき機を見ていると非常に勉強になります。じっと見入ってしまいます。がんばりましょう。試行錯誤で飛ぶポイントを見つけるしかなさそうです。

@y.takemura8488

6 жыл бұрын

有難うございます。今後ともご指導願います。

Dear Sir, This is something that I have been looking for, for the longest time. Is there a way that I can contact you via email or social media, to find out more? I sincerely hope that you would reply to this comment, and I look forward to hearing from you. Best, Darren

@y.takemura8488

4 жыл бұрын

Currently dormant. It's a video two years ago, and I forgot the details. Please refer to the other videos and consider them.

@JVIizz

4 жыл бұрын

@@y.takemura8488 Thank you very much for your reply. I am a professional magician based in Singapore. And I have an act that is related to butterflies. I would like to build one of these for my shows. I read through some of your comments, and understand that you do not sell and produce any of your makes, and i understand that flight control is of issue for this type of servo butterfly. I would like to know how technical is it for me to make one of these, and if you are able to guide me through how to build it. I intend to build one of this to allow it to fly in an indoor theatre environment. Is there any possibility that you can contact me via hello@darrenandjerryl.com. I would be willing to offer you a price for your blueprint and consultation help. Or if, I could even buy this original prototype from you and continue refining it from there. I have no computing experience, and have been trying to learn how a servo motor work based on your videos and some other home projects. I look forward to hearing from you soon. Thank you very much for the inspiration and for building these biomimetic robots.

@y.takemura8488

4 жыл бұрын

@@JVIizz Why don't you refer to the page below? archive.fabacademy.org/2018/labs/fablabbeijing/students/dian-song/finalproject.html

@JVIizz

4 жыл бұрын

@@y.takemura8488 Thank you for pointing me to some direction! I hope you keep creating and best of luck!