RC Slope Soaring in Hong Kong

今日同阿 Ken 傾起飛機設計﹐覺得都有幾多人鍾意自己設計同製作飛機﹐譬如阿幫今日就喱係屋企鬥緊隻自製電機。阿 Ken 提議搞番個古怪電機設計比賽﹐唔知有幾多人有興趣呢﹖

十幾年前係美國 RCM 雜誌睇到有人整左架 engine 推動既飛天剪草機﹐今日終于見到佢飛既 movie﹕

http://www.w2knews.com/rd/rd.cfm?id=041101FA-SkyCutter

搞一個古怪電機設計比賽的確很有趣，但參加的人數我相信不會很多。現在香港玩機的人一般都是買套件組裝，自己設計的很少。 滑翔機會的活動已安排到2月中，我們最快亦要在2月底才能有空搞比賽。 不如大家在這兩個月試試自制一些有趣飛行物件看看能否飛行。假如下個月我們在清水灣上空可以見到有吸塵機，雪櫃，狗屋等等滿天飛，到時搞比賽一定會更為吸引。
我提議先定下面之規則，如有其他意見，請在此提出：
1. 為安全計，飛行物件之最長長度不能大過2米。
2. 物件可用電動馬達推動，但必須能飛行3分鐘以上。
3. 能在降落後再次飛行。

我在網上找到下面幾段有趣飛行片段，大家可作參考。片段中之物件用的是引擎，但我們熱愛寧靜, 所以改用電馬達。
http://rcgroups.com/gallery/data/500/15107wilga.wmv
http://rcgroups.com/gallery/data/500/15107indycar.wmv
http://www.futurehorizons.net/saucer.htm
http://rcgroups.com/gallery/data/522/21375MOV04924.MPG

Hi Ken 要設計的飛行物體，係咪要唔似飛機外形，咁先至合格可以參賽。

設計同製作飛機都係好花時間﹐我認為最少要俾 4 個月D人準備。我都有興趣參賽。但個人比較喜歡係機動性方面搞D新意﹐而唔係外表。我出隻機既外形可能好平平無奇﹐唔知得唔得呢﹖

我指的趣怪電機當然不是指飛機類之物体，否則並非甚特別。其實要將一件不似飛機的物体飛上天並不容易。即使動力充足，亦要有良好的氣流力學才能穩定地在天上飛敷分鐘不跌下來。
至於何時比賽及更詳細之比賽規則，現在還是言之尚早，要看看多少人有興趣參與及在未來兩個月在清水灣上空出現甚飛行物体才能決定。

Lets discuss:

1, The flying object must be heavier than air.
(This is to rule out blimps or balloons. Anything charged with enough volume of helium / hydrogen can fly).

2, The flying object can be airborne by slope lift or self-powered. For self-powered flying object, HKRCSS encourage the use of environmental friendly power sources such as electric power or solar energy. ICE, turbines, etc are not allowed.

3, The main source of lift must not be obtained by rotary wing or vertical propulsion.
(Helicopters or VTOLs can be virtually any shape. We always see Doraemon heli in some Japanese fly-in.)
(Rotary wing is also not allowed in slope soaring objects.)

4, The flying object must be remote controlled. Radio, IR or any media without physical contact with the model can be used. The contestant must demonstrate the flying object is fully under controlled for normal flying routines including take off, flying a straight line for 50m, turns (both sides) and landing.

Any others?

I am interested.

CM你好,
你大部份的意見相當有理, 但我有點不同看法.
我個人應為不用立太多限制, 否則衹會得很小人參加.
你所指的rotary wing, 很難界定. 例如3D機的超大prop,當向上直飛時, 會同直昇機的rotor 十分相似. 而且, 我心目中的---朋友號 (講愛美神飛彈多些人記得套卡通片), 是用兩個會轉方向的超大prop, 可以垂直昇降, 這了樣也可能同 rotary wing 有關而被取消姿格.
所以我提意用非比賽形識, 祗為開心及不要會員太大花費!!
(正如像真機此賽, 用架歐洲三米ASW24, 計飛行形態及仔細程道, 都會此祖國的史各比好, 肯花費, 羸面都太些. 又例如電機賽, 肯花費買超輕勁貴機, 加超大無刷馬達, 羸面比有對好手指及識找熱氣流高. 我是窮人, 所以要自己做無刷馬達!)
所以, 祗要是自己做的飛機, 及非主流的, 就可以. 包括企業號, 太空船一號, 武士號, 人做衛星, 興登堡號也可以.
記得上年看過韓國一些 PSS video, 他們用發泡漻做了一架三四米的運輸機, 十分壯觀!!

Other thinkings:

Is active stabilizing devices (gyro, auto-pilot, etc) allowed to use?


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Hello Ah Pong,

Yes, you are right. In fact I also think that too many rules do limit our imagination. The 4 points I raised is mainly based on Ken's and your examples (indy car, witch and boom, lawn mower . .) I like the indy car and the witch very much. But hydrogen filled indy car is really not interesting, nor a witch with rotor blades turning on her head.

I think the first thing to do is to state the theme. Maybe we can hold this contest once a year: This year is "The most strange slope soarer", The next year is "The most innovative VTOL" . . . Then we can write the rules base on the theme. It is also easier for the contestant and the judges.

Any other ideas?

我同意阿邦, 不要太多限制, 一切要著重搞作及創意。 將一些不常見之物体飛上天空。考驗大家對氣流力學之了解。

CM,

I think we can use anything, but keep the noise as low as possible. I do not want the noise destroy the quiet environment.

Ken

我覺得主題應該係?#21407;創性?#21516;個 airframe 要係 100% 自製.(摩打﹐電池﹐遙控﹐螺旋槳等零件例外)。 創意可以發揮係外形﹐飛行動態﹐飛行原理等各方面。

阿 CM 講唔可以係山坡上面用 rotary wing 機其實唔係指朋友號個種機﹐而係唔想有人用隻拆左摩打或 engine 既直昇機黎當滑翔機用﹐跟住就笠個古怪 body 囉黎比賽。呢種玩法係外國同香港都已經有人試過﹐原理同 autorotation 一樣﹐隻直昇機熄左 engine 後除左可以繼續飛外﹐仲可以做 roll 同 loop, 無也特別。

也野叫古怪同新奇其實好難量度﹐我建議比賽最好用投票制﹐把尺由所有人定﹐公平之餘又唔駛定太多限制。因為如果有人真係搵隻直升機加個叮噹公仔殼黎比賽﹐D人會覺得佢無原創性﹐自然就會唔投佢票。

CM﹐我構思緊隻機真係要用 gyro 架﹗最好仲係 head lock gyro 添﹗

The rules of the contest are really much dependent on how you see the design contest- from an artistic or engineering point of view.

To me, I would be more interested in the engineering side of the design and would like to learn stuff like aerodynamic, mechanical system, material on the way of the design process.

In that aspect, I think we can have two classes of contest;
one for the powerless models which obviously flyable only on the slope using the slope lift. The other class is for electric powered models.

The reason is: the creative stuff that put into a flyable powerless model must not only be the funny shape but also emphasis on aerodynamic, otherwise it is not easy flyable. This will encourage more r/c pilots to design original models with decent flying characteristics.

Apart from the shape, the most creative stuff that put into an electric powered model, I would say, is the mechanical and electrical drive system, whether it is a VTOL or not. The emphasis should be putting on the originality of the design.

Hi CM, YC, Ken and Stanley,
As stated above, we shall decide the theme as soon as possible, any idea??

你地係唔係認真架﹖係我就要開始唸架啦。除左設計外﹐仲要唸用也野做法﹐foam + 纖維 應該係最輕最硬﹐想試好耐﹐但人懶﹐始終都無開工﹐依家如果搞比賽﹐相信會有番D動力。

我先前提出的四項規則，第一及三項仍因假定了參賽作品都是 Indy car 或 Enterprise 那一類以 lifting body 及非傳統機翼佈局作為設計重點的飛行工具，若然則輕氣，旋翼，垂直衝力等都有違該項設計原則，故列出以討論，不過大家(包括我)似乎對會飛的都感興趣，則該二點便不太適用 . . .

我個人認為，若整個活動不是以比賽形式，而是以同樂日或展覽會等形式進行，則更能吸引更多有與趣的朋友參加，且因不是比賽，不用訂立詳細的規則及指引來作為評分標準，更能擴闊想像空間。

雖然不是比賽，但我們也可設立一些獎項，例如"最不似會飛的飛行物體"，"最佳動，漫，電影世界飛行工具"，"空氣動力學大獎"，"機械設計與製作大獎"，"最浪漫飛行工具". . . 大家投票選出，無壓力兼開心

當然，一些規則還是要訂下的，我想安全飛行，環保動力及可控制等都是必須要堅持的。

是項活動八月舉辦如可? 可利用春天時間設計製造。

See a movie taken with a camera mounted on an eagle, vrey interesting!
http://media.animal.discovery.com/convergence/spyonthewild/birdtech/birdtech.html

I would be more interested in designing a model eagle with flexible wing and tail.

lack of idea? I'll give you some.....he he