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
It is currently 17 Oct 2017 07:49 am

All times are UTC + 8 hours




Post new topic Reply to topic  [ 18 posts ] 
Author Message
PostPosted: 29 Jun 2004 08:30 pm 

Joined: 03 Mar 2004 12:08 am
Posts: 42
見blue/pink foam cut出黎好靚, 想試下hotwire cut. 請問邊度有blue/pink foam 賣呀? thanks.


Top
 Profile  
 
 Post subject:
PostPosted: 30 Jun 2004 03:02 am 
:o 二世文提供:旺角道廣東道恒隆車場地下有間賣建材行、有天台隔熱板數拾元一件係green foam 密度低可能輕、未巧証、zman已入了數件、但還未開工做翼、詳情可問佢 :roll:


Top
  
 
 Post subject:
PostPosted: 30 Jun 2004 03:03 am 
:o 二世文提供:旺角道廣東道恒隆車場地下有間賣建材行、有天台隔熱板數拾元一件係green foam 密度低可能輕、未巧証、zman已入了數件、但還未開工做翼、詳情可問佢 :roll:


Top
  
 
 Post subject:
PostPosted: 30 Jun 2004 11:32 am 

Joined: 03 Mar 2004 12:08 am
Posts: 42
原來仲有多隻green foam架. 小克兄講果度係咪即係豪華戲院隔黎? Thanks!


Top
 Profile  
 
 Post subject:
PostPosted: 30 Jun 2004 12:23 pm 
我上次去呢頭只係見過藍 foam, 幾十蚊買左塊。但見唔到紅 foam 同綠 foam﹐雖然呢幾隻 foam 都係同樣材料﹐只係牌子唔同﹐但有多D選擇都好。可否相告確實地址同舖名 ?

Image


Top
  
 
 Post subject:
PostPosted: 01 Jul 2004 04:27 pm 
:o 又係zman提供:pink foam 在灣仔聖備買、4x8尺約120元、聖備資料可在黃頁軟木發泡找、但pink foam比bluegreen foam重,約為10-25巴仙、而在旺角買的foam係用作天台地台隔熱用,所以foam邊起級、方便互疊再落防水及英泥、blue foam比較快變粉碎,可能硬,green foam耐用,可能un、當然唔同廠出品又有分別、未知有冇師兄提供詳細學名及分別、另上次買green foam的舖名唔記得、地址約在廣東道豪戲院向前行、到小露天車場對面、恒通大地下碧文天花材料隔離鋪、係賣防水防火化工料、green foam會鋪內架頂、good luck! :roll:


Top
  
 
 Post subject:
PostPosted: 01 Jul 2004 11:06 pm 
小克 wrote:
...當然唔同廠出品又有分別、未知有冇師兄提供詳細學名及分別...


呢 D 發泡膠材料既化學成份同書局賣既白色發泡膠一樣﹐叫 Expanded PolyStyrene﹐簡稱 EPS。呢D發泡膠有幾隻色﹕綠﹐紅﹐藍﹐灰﹐黃。唔同顏色只係代表唔同生產商﹐每隻顏色都有唔同硬度同重量供選擇。所以無話邊隻色特別重或硬。

綠 foam 係 BASF 化工生產﹕
http://www.basf.de/basf/html/plastics/englisch/pages/schaum/styrodur.htm

藍 foam 係 DOW 化工生產﹕
http://www.dow.com/styrofoam/index.htm

紅 foam 係 Owen Corning 化工生產﹕
http://owenscorning.com/around/insulation/products/foamular.asp


Top
  
 
PostPosted: 01 Jul 2004 11:27 pm 

Joined: 26 Jun 2004 09:59 am
Posts: 204
Location: Hong Kong
http://www.wfu.edu/albatross/videos/albatross2.gif

聖備貿易有限公司
灣仔 安邦商業大廈
電話:2572 0271

I think this is the one. :roll:


Top
 Profile  
 
 Post subject:
PostPosted: 13 Jul 2004 04:08 pm 

Joined: 03 Mar 2004 12:08 am
Posts: 42
唔該晒咁多位大佬, pink foam終於搵到喇! 而家緊開工做隻foam core既 fiberglass wings!

Image

Image


Top
 Profile  
 
 Post subject:
PostPosted: 13 Jul 2004 04:31 pm 
Henry Chan wrote:
唔該晒咁多位大佬, pink foam終於搵到喇! 而家緊開工做隻foam core既 fiberglass wings!



勁抽﹗老兄應該係全港頭幾個人做呢種結構既 DIY 機。記住貼多D相上黎俾大家睇。我試過 bag 塊 balsa 做實驗, 想D纖維布係後緣出面黐埋﹐但咁簡單既野都失敗﹐所以我仲未敢 bag foam 翼。


Image


Top
  
 
 Post subject:
PostPosted: 13 Jul 2004 05:38 pm 

Joined: 03 Mar 2004 12:08 am
Posts: 42
我諗住用pink foam做core, 加carbon rods做support, 一塊fiberglass cloth+epoxy, 再加多層Microballon+epoxy做finishing. 不過都有好多小問題要解決. e.g. 上epoxy去fiber cloth時成日都會黐唔實塊pink foam, D鬼老用heater去solve呢個問題, 但無啦啦去邊度搵咁大個heater呀!

不過係try and error既過程會學到好多野, 失敗得返黎既經驗會比成功多. 有機會大家一齊研究下啦!

Vacumm bag我都未識整, 同埋D架餐(Mylar, pump, heater, ...)都唔知去邊搵. 遲D真係要請教下你!


Top
 Profile  
 
 Post subject:
PostPosted: 13 Jul 2004 11:12 pm 
User avatar

Joined: 03 Mar 2004 09:46 pm
Posts: 25
Location: 荃灣
Hi Henry
我唔知到heater用呢做怎麼的?可唔可以話我聽.我用袋袋mode咗隻飛翼機都OK以在星期一試飛但有空難事件~嗚~~嗚~~~嗚.下次在飛鵝山見到面一齊研究'研究'


Top
 Profile  
 
 Post subject:
PostPosted: 14 Jul 2004 02:06 pm 
Henry 講既 heater 會唔會係指一般鬼佬叫既 hot box﹐ thermal box 或 curing box ﹖ 對室溫硬化既 epoxy 黎講﹐ 佢既作用係加快硬化時間﹐epoxy 一般每加熱 10 度﹐硬化時間就減半。我都用紙盒粗粗地整左個。幾好用。如果係做真空袋﹐加熱D epoxy 仲可以令D膠稀D, 加強流動性﹐可以令多餘既膠容易D?#24517;?#36208;﹐有助減輕製成品重量。

Image

Image

Image

Image


Top
  
 
 Post subject:
PostPosted: 16 Jul 2004 12:28 am 
User avatar

Joined: 03 Mar 2004 09:46 pm
Posts: 25
Location: 荃灣
我明白,唔該晒. :D


Top
 Profile  
 
 Post subject:
PostPosted: 17 Jul 2004 11:23 pm 
Fiberglass coated on the wings, but not very good! You can see that the cloth can't stick onto the foam firmly.

Image


Top
  
 
 Post subject:
PostPosted: 17 Jul 2004 11:23 pm 
Image


Top
  
 
 Post subject:
PostPosted: 17 Jul 2004 11:28 pm 
Actually this is not a good method compare with bagging, but as an experiment it's worth to try I think. Eventually, I'll make a bagged version.


Top
  
 
 Post subject:
PostPosted: 18 Jul 2004 12:22 am 
DIY 既滿足感係來自發現自己都可以做到﹐有時仲係用自己唸出黎既方法﹐唔駛跟人地﹐好﹗努力﹗加油﹗支持﹗


Top
  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 18 posts ] 

All times are UTC + 8 hours


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron

RCSAIL Home

WindGURU at Ma On Shan, Clearwater Bay and Fei Ngo Shan

Powered by phpBB® Forum Software © phpBB Group