Hotshot 系用頭單向

20幾年前，我有部回力刀，當時因為原裝頭差速唔暢順，所以口係「遙控模型」口的見到有頭單向賣。冇記錯賣間舖叫「展藝」。件補品要＄200，我想問:
1.單向有乜用？有乜特性？
2.用左單向, 架車可唔可以向後行?
3.件單向係乜牌子, 係咪土炮貨?
謝謝你的愛 hehe

1. outer wheel can run freely, full power to inter wheel
2. no only if you use both one direction in both front and rear, yes I seen one before..
3. see two difference hong kong brand before

please someone correct me, think like a little bit wrong.

[ 本帖最後由 fat_fat_cat 於 2008-3-4 03:26 編輯 ]

thx brother fat fat cat.

i wanna add a 頭單 on my upcoming Hotshot .... brothers think, will this old option still available ~ ?

i think should difficult to get law...

A ball differential is rare and expensive in ebay or yahoo jap.  I have never seen the one way in the auctions (maybe it is only local made as mentioned by brother fat_fat_cat).  If anyone got this item, please post a photo here.The old advertisement on  遙控模型 is also requested.