Elf

mike, lawrence here
FORGET ABOUT YOUR 24" BIG DICK

Elf

who's gonna 報位if u go sneaking like me and W?...

Elf

you are our exclusive observatory mate
planning to get an extra cylinder set besides the supermax original one?

Elf

the m4 ptw cylinder is 66 mm long x 6mm radius
volume of cylinder = πr^2*height - 7460mm^2

volume of a 509mm barrel = 509 mm long x 3.01 mm radius
volume = 14384mm^2

so basically there will be a suction from the cylinder when the cycle completes that draws air out of the barrel.
this is the same as i've told you. this will create a turbulence for the BB and it will definitely go curved

Elf

measurement of m4 cylinder is based on these factors :
1) M4 cylinder is a 3/4 cylinder instead of full cylinder of M16.
2) spring guide, spring and cylinder takes up considerable amount of space.
3) outer diameter of cylinder is 25.5mm, however the inner wall is about 5mm each side, making about 6-7mm radius.

however, considering a M4 363mm inner barrel has about 10k mm^2 volume, the above calculation is indeed too conservative.
I would say a M4 cylinder is roughly 11000mm^2 and that cannot feed a 509 mm barrel at all.

Elf

講得簡單D就係話, 個氣筒內的空氣唔夠係BB彈離開內管前充滿氣. 拍頭會跟住向後拉, 吸番內管入面既空氣入去.
你會見到BB彈初速會低左, 同埋彈道十分之唔stable.
AEG都會有同一現像, 試下放M4 cylinder落條509管你就會明.

Elf

363mm mate

Elf

in fact you can have a 363 inner barrel and get a 20 inch outer barrel. it works

Elf

standard M4 length 14.5"

Elf

the m4 kit it is
i thought u placed the order already though???

Elf

引用:

原帖由 sailun412 於 4-8-2010 02:55 發表


hey! r u Mr.Ng....????

咪佢囉

Elf

引用:

原帖由 sailun412 於 4-8-2010 14:21 發表


then u muz be "威利氏"....

im not that old yet   although 威利氏 is mentally 18 only

Elf

引用:

原帖由 CPK 於 5-8-2010 16:36 發表


等小第獻醜

氣筒內半徑約 1.15 cm
故氣筒體積 = r^2 X π X 長 = 1.15 X 1.15 X π X 6.6 = 27.42 cc

槍管內半徑約 3.01 mm = 0.301 cm
509 mm 管體積 = 0.301 X 0.301 X π X 50.9 = 14.49 cc

因為氣 ...

多謝師兄指教. 原來我計錯數, 量錯cylinder半徑.
外徑為25.5mm, 外壁大約2.4/5.1mm, 內徑=18mm左右
cylinder volume = π(18^2)*66 = 67k mm^2

咁計我就錯啦. 多謝CPK計指出錯處, 失禮晒