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Car Action World's Fastest RC Car Challenge! What car are you going to build to break the world speed record for RC cars?

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  #126  
Old 05-16-2004, 10:53 AM
Grant Tokumi Grant Tokumi is offline
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I was hoping that the track was small enough to be able to make one complete lap around it to reach the top speed. So radio range and batteries do become an issue IMO. And even if you had signal at that range, don't you get some delay when you are that far out?
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  #127  
Old 05-16-2004, 02:55 PM
Chris LaPanse Chris LaPanse is offline
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Quote:
Originally Posted by REVOman
lol, i cant help but find humor in this, personally, i dont think any car is gonna go very fast usin the Boat prop
Even if it did, it would be disqualified
Remember the rule: "No Thrust powered vehicles"
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  #128  
Old 05-16-2004, 04:17 PM
crank throw wei crank throw wei is offline
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Quote:
Originally Posted by Grant Tokumi
And even if you had signal at that range, don't you get some delay when you are that far out?
Good point.I'll check mine later today.
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  #129  
Old 05-16-2004, 05:16 PM
Speedtester Speedtester is offline
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Originally Posted by crank throw wei
Good point.I'll check mine later today.
The delay is so miniscule you wouldnt notice it.
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  #130  
Old 05-16-2004, 09:04 PM
crank throw wei crank throw wei is offline
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What I noticed was in a very open area,the delay was minimal.With objects such as building,trees,etc. around,the delay was pronounced.I tried this with an AM radio,which may have little bearing for our purposes.
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  #131  
Old 05-16-2004, 11:52 PM
Grant Tokumi Grant Tokumi is offline
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Quote:
Originally Posted by crank throw wei
What I noticed was in a very open area,the delay was minimal.With objects such as building,trees,etc. around,the delay was pronounced.I tried this with an AM radio,which may have little bearing for our purposes.
Good to know. What I remember was when I first got started in rc, I would want to see how far it could go so I'd drive it up my narrow street with houses on both sides. As I got pretty far, maybe 80-100yds, I noticed I had some delay in my controls, so that made it difficult to turn around sometimes. I had an AM as well. So that experience kind of matches what you found today. At least its consistant.
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  #132  
Old 05-17-2004, 12:23 AM
Speedtester Speedtester is offline
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Ok someone please correct me if I'm wrong but dont radio waves travel at around 186,000 miles per sec if not obstructed but anything??
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  #133  
Old 05-17-2004, 01:16 AM
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metalry101 metalry101 is offline
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I don't think so. That's the speed of light, I don't think radio waves travel anywhere near that fast. I could be wrong, but I think they're a bit slower, still fast mind you, just not that fast.

Anyways, I'm thinking that signal strength may have more to do w/ the delay than the distance. Since there were a lot of objects for the signal to bounce off of, that could have weakened the signal a bit by the time it actually got to the vehicle. I'm kinda thinking that maybe Rx's need a certain strength of signal, like a specific threshhold (sp?) or something, before they react to the signal. Maybe it took that long for a strong enough signal to get to the vehicle? Just a guess really, as I don't know exactly how the radios work, but it seems like a possible solution, even if it is completely incorrect.
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  #134  
Old 05-17-2004, 04:04 AM
DaFF DaFF is offline
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Delay is really minimal, as someone said it, the radio wave travel so fast you'll need highly precise instrument to even detect it.

Don't forget that the plane guys use the same type radio that we do.

They go a lot further than we do with plane that can travel at twice the speed of most car ( not to talk about jet powered plane LoL)

If there was any sort of delay or anything like it, they would not be able to drive their plane.

So, just don't worry about range and delay, I tell ya, there's better think to think off when you try to break the 100 mph barrier !

DFF
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  #135  
Old 05-17-2004, 05:34 AM
Gyro Gearloose Gyro Gearloose is offline
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The delay is nil almost, insignificant.

There is far more delay from the eye to the hand.
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  #136  
Old 05-17-2004, 07:57 AM
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Radio waves travel at the speed of light (186,000 miles per second) , so I would be VERY impressed if you could detect any delay from a 1/4 mile.
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  #137  
Old 05-17-2004, 08:51 AM
Craps Craps is offline
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Steve Pond
Do you have any kind of idea how the speed will be measured to verify it and will it have to be backed up with another run in the opposite direction like they do the big cars at the Salt Flats?

Will it be with a radar gun, measured distance through a trap of say 100 feet or is it going to be what it will run around the entire 1/2 mile track?

This makes a difference to what kind of car and set up I need to engineer and build.

This is a great idea you guys decided to do, but can't we do it this year too?
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  #138  
Old 05-17-2004, 11:05 AM
cretin cretin is offline
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why would anyone want the track set up so that the radios become an issue? this a high speed challenge, not a radio challenge, right? i'd like to see the track set up to allow as close to daytona superspeedway racing as possible, meaning hammer down and never lift! we can't go run an rc bovveville, so let's let the cars run as flat out as possible.

i know it's only one class... top speed, but i hope there are some people willing to bring out some non-contenders if only for fun. like was posted earlier, i'd rather see an 80 mph monster truck than a 100 mph touring car. classes would ne nice, if not until "next year"

please, no prize money.
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  #139  
Old 05-17-2004, 11:25 AM
DualBL DualBL is offline
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how bout we put a kicker on the track, and go for most air?

-Nick
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  #140  
Old 05-17-2004, 12:02 PM
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Steve- This is Jason from TRX. Could you send me a PM with your email addy, I need to ask ya a question about the rules!

Thanks
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  #141  
Old 05-17-2004, 03:18 PM
Chris LaPanse Chris LaPanse is offline
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I would guess that it would be a two way record. That is how the boat is. Otherwise the boat record would be 122.8. Also, that negates wind or track effects on speed. The only thing that matters then is the car. Wish I had a way to get to CA, but it is too far for me .
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  #142  
Old 05-17-2004, 03:34 PM
Gyro Gearloose Gyro Gearloose is offline
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Wish I had a way to get to CA, but it is too far for me
It is too far away from 90% of us, unless you happen to live on the west coast.
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  #143  
Old 05-17-2004, 04:00 PM
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ElectricThunder ElectricThunder is offline
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Quote:
Originally Posted by rc10gtisthebest
LOL, you and me both. South Florida is like cut off from everything... We always have to travel for something.
I know what you mean, but we get some cool things, like the air and sea show and some other things...o who am i kidding...we get NO RC STUFF! lol
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  #144  
Old 05-17-2004, 04:02 PM
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Quote:
Originally Posted by DualBL
how bout we put a kicker on the track, and go for most air?

-Nick
I'm with him^ hehehe....
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  #145  
Old 05-17-2004, 04:56 PM
sosidge sosidge is offline
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Quote:
Originally Posted by ElectricThunder
I know what you mean, but we get some cool things, like the air and sea show and some other things...o who am i kidding...we get NO RC STUFF! lol
Methinks you have the 1/10th touring world championships this year - pretty high profile.

Anyway people, stop fussing about the location of the event - I'm 8 time zones away, 13 hours flight, and I think its a great idea, and a great location. There's no race track in the world that is next door to EVERYBODY.
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  #146  
Old 05-17-2004, 06:29 PM
cretin cretin is offline
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people don't want a track that's close to everybody, just one that's close to THEM.
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  #147  
Old 05-17-2004, 06:58 PM
PeterV PeterV is offline
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The speed trap will be very short, like ten feet, and all we care about is the maximum velocity. Not average speed over a longer distance, not an average of two or more runs.
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  #148  
Old 05-17-2004, 08:35 PM
Chris LaPanse Chris LaPanse is offline
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You should do a two way to negate any wind/track/hill/etc. effects so the only thing that matters is the car.
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  #149  
Old 05-18-2004, 02:35 AM
Gyro Gearloose Gyro Gearloose is offline
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The speed trap will be very short, like ten feet, and all we care about is the maximum velocity. Not average speed over a longer distance, not an average of two or more runs.
That will be quite an unreliable way to measure, a ten mile tailwind at track level will mean just that, 10 mph added to the top end.

You don't think that's a huge variable, Peter? It's not like everyone will have the same tail or head wind, what happens when one guy gets a 20mph tailwind and the wind is down to 5mph through the traps for the next guy?
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  #150  
Old 05-18-2004, 02:47 AM
Grant Tokumi Grant Tokumi is offline
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I'm no expert in aerodynamics, but something tells me a 10 mph tailwind would not automatically add 10 mph to a car's top speed. Maybe in an airplane, but not in a car.
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