Hong Kong RC Sailplane Forum 香港滑翔機發燒友論壇

This forum is dedicated to r/c sailplane enthusiasts 此論壇專為遙控滑翔機發燒友而設
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PostPosted: 16 Nov 2015 02:02 am 

Joined: 16 Nov 2015 01:43 am
Posts: 8
各位好, 小弟新手一名, 只是心血來潮好想自己做一架飛機, 於是上網找資料做了一架. 這個已經是第二代自製飛機 (第一代過重及機型問題報廢了), 我前幾日上山試飛前, 已經測試了CG及馬達是足夠動力飛行. 但是我第一次飛行時, 當轉向會突然失速, 自轉機頭向下直落. 開始是認為是我控制問題, 於是再飛第二次時, 同樣一轉向會突然失速自旋直落. 好彩有好心師兄幫手, 否則這架機已經沒有了. 請教各位師兄, 請問是什麼地方出現問題會導致這個原因! 好想改進繼續成功飛行!

Spec:
朗宇1250KV + 8060槳
2200mah 11v
futaba 控
futaba r617fs receiver

Image

CG Testing



First Flight


Second Flight


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PostPosted: 17 Nov 2015 12:14 am 
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Joined: 26 Feb 2004 03:51 pm
Posts: 3617
Location: Hong Kong
應該是dihedral 不夠吧!翼兩外邊要比翼中心位為高,當飛機頃側時如果有dihedral,內側一面由於水平角度少於另外一面翼,產生的升力會大些,飛機就會自動回中,保持水平


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PostPosted: 20 Nov 2015 11:13 am 

Joined: 16 Nov 2015 01:43 am
Posts: 8
Search了 dihedral angle 後, 學多了知識. 謝謝你.

在網上延伸知識, 了解初步 positive dihedral angle , negative dihedral angle . polyhedral angle .

但係我不明白什麼叫做gull wing, 好處及不好處是什麼呢? 因為我架機都似係gull wing, 想了解多些中間係三角的飛機, 影響是怎樣.

另外我在網些search 到 john collins 的紙飛機youtube. 都幾得意, search 比大家.

https://www.youtube.com/watch?v=2n4xq0DnbHI


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PostPosted: 25 Nov 2015 08:18 am 

Joined: 16 Nov 2015 01:43 am
Posts: 8
http://youtube.com/watch?v=QHx7gtwcx9I


第三代,終於飛到了


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