QUOTE(antoro @ Apr 14 2009, 07:21 PM)
Hello guys... my name is antoro... and I am fans of mini4wd from Indonesia..

and actually I am selling few of mini4wd products here in Indonesia and also in the internet....
I want to clarify the statement of my friend (indonesian monster) on his previous post about 200km/h speed.. .please re-read again you will find that its on drag race event... the track of drag race is usually only contain stright lane.. I dont know about the motor that can run 200km/h but I myself usually build a motor that on speed car can run > 120km/h with sanyo 700 batteries.. (on speedchecker)
also there is question in the previous post that questioning how to measure the speed over 99km/h in speedchecker... ? the speedchecker have 2 mode of measurement.. the speed in km/h and another is distance mode.. in the second mode you will be able to set the distance start from 300 m .... 290 m.... 280m ... and so on.. when you start your car in speedchecker.. it will count how many time that your car need to run along 300 m... and viola!! by using elementary math operation you will find that 300m devide by running time (s) then multiply the result with 3600 s/hour and devide again with 1000m/km you will fine the speed of your car....

for ex : t is your running time along 300m lets try 8s
speed = ( 300/t ) x (3600/1000)
speed = (300/8) x 3,6
the result is = 135 km/h
I hope it useful ...

nice to see another racer join this forum and thanx for the calculatins
putting the car on the dyno to check the speed is totally different then calculating its run on the actual track where it have drag , resistance and surface grip.
have u measure your speed basad on the length of the track with the fastest timinig done that maybe faster or slower.
long time ago we used to play speed here also but the way we calculate is different .our aim is the go as many pcs of track we can in a second.
example
total 200 pcs of track multiply by total laps devide by the timing to get the total
200 multiply 3 devide by 25sec total 24pcs of track per second
now in china they have gone 53 pcs per second
the fastest i reacall here is 43 pcs per sec if i am not mistaken that was i think 11 years ago
can i know more about the race format and rules for speed race in indonesia
i hope the learn new things