saotome

一家大細

RayRay

Your flight is good. I like it. I brought a helicoter from ShenZhen at a price 180RMB only fly up and down and a little bit forward. Once I lower than the battery power, it dropped on the ground. ****.

Guy

原帖由 RayRay 於 2008-4-11 22:55 發表
Your flight is good. I like it. I brought a helicoter from ShenZhen at a price 180RMB only fly up and down and a little bit forward. Once I lower than the battery power, it dropped on the ground. **** ...

Your 1st time?
  ???BATTERY POWER??? why lowering it
or you mean attitude control

The attitude control of mine ( actually all control but Yaw control)is not proportional.
ie ...it not going to lower 50% of the attitude when you lower the power 50%..

Think about this as you r driving a car.

Starting Point is A; your car position is B
you need to accelerate to get it moving...however the car will keep on moving forward until you hit the brake to decelerate  ...

Steady attitude is like maintain the displacement from point A to point B
Change attitude require you to increase power as well to decrease power, vice versa.

Therefore,
Change in attitude is to add and remove vertical momentum on the plane.

Now, at the end to make it realistic in life, put slope(uphill) on the road as gravity acts on the helicopter. and as well air fraction.

at the end, here is the answer to your question, lower the power it will drop, when it drops , give it some power to stop the momentum of falling..

[ 本帖最後由 Guy 於 2008-4-14 21:20 編輯 ]

saotome

$180 RMB
我估係 2 channel 既玩具，係唔係？
如果係大隻（1 呎或以上）果 d 你就要小心 d 呀，因為基本上係冇得控制架！得油門同尾轉，根本係血滴子一隻！

FYI 玩直昇機最少要 4 個 channel。
飛機 3 個 channel 都得，不過 4 channel 會好好多。

順便貼埋我隻 fix pitch 直昇機既試飛片：


[ 本帖最後由 saotome 於 2008-4-14 21:39 編輯 ]

Guy

原帖由 saotome
FYI 玩直昇機最少要 4 個 channel。
飛機 3 個 channel 都得，不過  ...

Not necessary....

There are two channels helicopter out there..which you might find them without the back prop (replaced by a big back fin)
you might not realize these helicopter do not have vertical and bank control.

it only have pitch and yaw control. Pitch angle affects the altitude and speed. and yaw control the directions.
so you can imagine you control it just like a plane or autogyro (if you know what that is).

saotome

我都知出面有大把 2 通道既 heli，9 成 9 都係玩具！當佢講 $180 RMB 果陣我幾乎可以肯定喇。前排大熱既 Picooz 已至 e 家無數既 copy cat 都係 2 通既玩具。

上年我有個 fd 就係響玩具 xx 城買左隻大約 1 呎長左右既垃圾，根本係冇得控既（小弟果陣已經學識左停懸，所以可以比較）。事因條尾冇 gyro 鎖住、CG 又衰、隻野一俾油就亂飛，危險到極點（e 家已經冇得賣，好彩。）

autogyro 當然唔駛尾漿啦，不過佢有都有 2 個 rotor 喎！一個響頂（類似 heli）一個響尾（提供 thrust，類似飛機）。$180 RMB 係冇可能做到架喇！況且 2 通既 autogyro 真係未見過…

Ray: 要玩就玩好少少既機啦，可以學到野之餘又有滿足感

Guy: 喂喂，唔好收埋自已玩喎！我地 sat 有機局，快 d 出黎一齊飛啦

Guy

SAT = gf day

They are all disassembled for upgrade.
still doing research on those flight sensors..=\
and i am broke ($$$ => TAX )

no $$ to get a new one

saotome

今日有包裹到，換新鞋！

希望有左佢地降落會穩定 d 啦。

saotome

春天黎喇！各位飛友準備就粹