Xray XII spinning problem

請教各位師兄, 我架xii 直路俾油就spin(打白鴿轉), 請問有咩野set錯左呢? 都已經換左ko 951 servo, ceramic珠同 收緊珠差.  

loosen your diff a little.
set less punch on throttle.
set negative on throttle curve.
use a less powerful motor.
make sure your left/right balance is correct.

Many thanks for your tips.

By the bay, could you pls further elborate the left / right balance of the car?  Do I need to use the 鉛 to balance the body?  How can I measure the balance of the car?  Or just try and error?

Below is my XII's configurations:
Hobbywing 9T brushless esc + motor
Pinon gear 24T
Main gear 96T
Front & rear tyres: ATS r32

Is lowering the body height helpful or not??

你係咩地玩?

PYC

3# alfa156

left / right balance -> it depends on the size/weight of your receiver.
calculate the weight difference between the esc (with wires) and receiver, then place lead weight on the receiver side.

this assumes you play 4-cell NiMh

<off topic>
EDI 兄:  Please check your PM (regarding M03r) thanks!

PYC
EDI 發表於 23/4/2009 09:17

                               
登錄/註冊後可看大圖

有無搽呔水? T板有無tweak到..? 左右兩邊平衡?
用緊咩呔?

放鬆差速小小之後加速好左d, 冇spin啦!
但係直路一落brake又spin, 真係吹漲...
係唔係因為架車左右唔平衡...
架車冇搽呔水, 點度左右平衡度呢? 加鉛?

如果你灣前一定要落 brake 嘅話
常試下早 d 落 brake 收車
落 brake 唔好紐軚

放鬆差速小小之後加速好左d, 冇spin啦!
但係直路一落brake又spin, 真係吹漲...
係唔係因為架車左右唔平衡...
架車冇搽呔水, 點度左右平衡度呢? 加鉛?
alfa156 發表於 23/4/2009 23:42

                               
登錄/註冊後可看大圖

玩12仔一定要落呔水~!會有意想不到既效果

其實如果你行4cell電 左右2邊重量平衡唔會差好遠, 因大多數人都係電變放左, receiver放右~
你可能會話電變實重過接收, 但你睇返架車個servo 擺位係扁右, 所以2邊其實相差唔會太大....

最重要係係T板平衡, 呢樣野會影響你架車行得直唔直, 大細灣呢類問題。

10# alfa156

"但係直路一落brake又spin, 真係吹漲..."  ->
This is a feature of 2wd (rear wheel)!  
Because when you brake, only the rear wheels are locked, while the front wheels are still spinning, so the weight transfer is not even between the rear and the front, causing the rear to spinout.  Does your car always spin to only 1 direction?  Usually I find the car spins towards the heavier side.

you may try the following:
- brake earlier to reduce speed into a turn (or take your finger off throttle earlier, let it glide into a turn)
- use less brake power
- pump the brakes (like ABS in a real car)

BTW: 2wd is a great way to train your finger!

Have the same problem playiing in Shek mon....
Tired different tightness on rear diff. Rear with lots of tire water, front only half or none.
What else can be done ? add weight ?
Tried adding smoother oil on Char char. Mine is L4.

有無搽呔水? T板有無tweak到..? 左右兩邊平衡?
用緊咩呔?
lung1 發表於 2009-4-23 21:00

                               
登錄/註冊後可看大圖

有搽呔水
用緊JACO PINK & DUBBLE PINK