OFFICAL SPEED THREAD
 

post your rc and the top speed of it. if its upgrades post the stock speed then the upgraded speed .electric or nitro. this should help some people find out the top speeds of an rc in a easy way

RE: OFFICAL SPEED THREAD
 

I need a radar gun for such a thing...I might rob a cop or something...LOL.:D

RE: OFFICAL SPEED THREAD
 

^^^^^^ lol tell me when you do

RE: OFFICAL SPEED THREAD
 

48 mph- evader st pro, with the mamba 6900 on 7 cell IB 4200 wc, gunned with a bushnell velocity radar gun
50 mph- LOSI MF2 MM 6900 MM 6900 7 cells, same radar gun
54 mph- xray T2 MM esc, orion vortec 3.5 on 6 cell IB 4200 wc, gunned with same radar.

RE: OFFICAL SPEED THREAD
 

18MT, bone stock, about 20 MPH, anyone know of some good radar guns:D (that don't cost an arm and a leg:))

RE: OFFICAL SPEED THREAD
 

id guess my jato bout 50mph...into a mailbox[:@]

RE: OFFICAL SPEED THREAD
 

I will be on the list soon :) so far We have clocked my old stampede vxl with 3s lipo at 66 mph

Hoping my evader project will pass it...

RE: OFFICAL SPEED THREAD
 

you wont really get any high speeds with rc cars because gear ratios and control they have those tether ones that go like 190mph

RE: OFFICAL SPEED THREAD
 

I noticed all the fuel powered RCs mentioned above are nitro. Unfortunately, nitro fuel engines will not get you much higher top speeds even with very high gear ratios because niteo engines serious suffer from a major lack of torque. Gas engines are what would be needed to turn very high gears to go consistently faster than 60MPH. Anyone done any top speed runs with like an FG or a B5 Baha geaerd way high? If so, please post, I am curious just how fast a gas engine will push an RC.

As for pushing very high gears with nitro engines, the only way to do it to reliably break 60MPH is to mount more than one engine. Otherwise, a single nitro engine just will not turn any faster than maybe 28000RPM with high gears.

RE: OFFICAL SPEED THREAD
 

im not sure but im guessing somewhere aroun 45 in my t4 powered by mm5700 smc ib4200 batts. its about as fast as my os .18tm powered revo

RE: OFFICAL SPEED THREAD
 

I've never actually clocked it, but my FG MT comes out a bit faster than my Jato 3.3 :/

RE: OFFICAL SPEED THREAD
 

i got one.. 104.3 mph, in 1.3 seconds. with a GMS dragster.

RE: OFFICAL SPEED THREAD
 

This one?
http://video.google.com/videoplay?do...42196900806644

RE: OFFICAL SPEED THREAD
 

The problem with these types of threads is that the reader is forced to rely upon the vehicle owners word and unverifiable, often inaccurate speed measurment systems and devices. Radar guns need constant callibration to be accurate, GPS is inherently inaccurate for short distances, speed traps are too easily manipulated and videos too easily faked.
IMHO, the only speed claims that can be even marginally believed are the results of sanctioned, monitored events - and even those generate enough controversy to put their results into question.
So go ahead and post up your numbers but I for one (and I hope anyone with common sense) will remain skeptical.

RE: OFFICAL SPEED THREAD
 

^^^^ +1

RE: OFFICAL SPEED THREAD
 

Simply set up a drag of X feet, have someone time the run, and calculate it from there. For best results (to lessen the effect of latency of human reaction on the speed/time), set up a longer drag.

Measure out say 100 feet. Give yourself Y feet of initial run before the drag. Time it, and then calculate it.

(LENGTH_FT/TIME_SEC)*(1(mi)/5280(ft/mi))*(60sec/1m)*(60min/1hr)

So if you've got a drag of 100 feet and your truck finishes it in 2.25 seconds:

(100/2.25)*(1/5280)*(60/1)*(60/1) = 30.3MPH

RE: OFFICAL SPEED THREAD
 

yeah, thats my car. that was the first time i got to 100mph... i also got second at the IMDRA world finals this year, setting a new offical world record of 100.2 mph.

[link=http://www.imdra.com/phpbb/portal.php]here is the web site[/link]

RE: OFFICAL SPEED THREAD
 

Your math is wrong, I'll give the correct answer when I gat a chance to.

RE: OFFICAL SPEED THREAD
 

Bandit VXL, 3S 5000 maxamps Lipo. Geared 35/76. 70.9mph. Took three runs to get over 70mph. Speed read by local cop trying to take a nap in the parking lot where I run. He ask me how fast it was and i said " you're the one with the radar gun so" Pretty cool guy. he's radared it a couple of times for me with different batteries.

RE: OFFICAL SPEED THREAD
 

Heh, actually, my math is correct. Maybe putting it in this form will help:

100 ft x 1 mi x 60 s x 60 min
----------------------------------
2.25 s x 5280 ft x 1 min x 1 hr

This equals 30.3mi/hr.

RE: OFFICAL SPEED THREAD
 

Weather the math is right or not (and I have not bothered to check) is really irrelevent. Reaction time and paralax can mean that the timing can be off 1/2 a second or more. Which makes this method good only for an approxamate speed. The best method would be an electronically triggered speed trap - similar to what appears to be being used in the dragster video.
I have also heard of people video taping a speed run through a measured distance and counting the number of video frames and using the frame speed to calculate the speed of the car.

Still much of the numbers reported are subject to peoples desire to be the best/fastest and so much can be altered electronically that it's very hard to trust any stated speed figure. That may just be my opinion though, idk.

RE: OFFICAL SPEED THREAD
 

So using a radar gun is no good?, or are we saying its a approximate speed detection, give or take a mile or too?

RE: OFFICAL SPEED THREAD
 

id say add + or - 3-5 mph to a radar gun

RE: OFFICAL SPEED THREAD
 

You're right about reaction time. If you wanted to make that less of an issue, try having whoever runs the stopwatch test their reaction time here a few times, average it out, and then make adjustments accordingly.

This method is probably the easiest, though.

RE: OFFICAL SPEED THREAD
 

this is getting to be a nerd convention.