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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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  #176  
Old 05-19-2004, 12:11 AM
crank throw wei crank throw wei is offline
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Well,for what it's worth,I think a second run would be cool just because how often do you get a chance to have an oppertunity like this?Not as a back up run,just because RC is fun,and high speed RC is the (explitive deleted)!
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  #177  
Old 05-19-2004, 02:17 AM
GForce GForce is offline
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Steve or Peter

Could you answer this for me?


How long is the straight away before entering the 10 foot speed trap?

I remembered this is the format for IDEA speed run but instead of half-mile oval, they use a 300 foot straight away and 10 foot speed trap & the end. (total of 310 feet, start from dead stop)

Currently running a Dragmaster funny car & planning on entering the WFRRCC but may reconsider a different car (pan 10L etc....) depending on spec of the track.

When will we know the schedule? Sign up? information.

Please reply on this forum or email me. Thank You!
Looking forward entering this competiton.
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  #178  
Old 05-19-2004, 08:04 AM
KMac KMac is offline
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For all you rules microanalyzers, do you REALLY want to have to go both directions? Because, it is always done within a pretty tight time window and I'm predicting that a lot of these cars that will go probably 120+ mph aren't going to have happy endings after their first run and they will NOT be prepared for the second run in time, if at ALL. So do you wan't to have to throw away your first run because you created yourself a rules dilemma?

For all the guys who aren't satisfied with the rules, either start your own contest or don't show up to this one because nobody else that's there having a great time and marvelling at each other's technical achievements is going to want to hear your complaining.
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  #179  
Old 05-19-2004, 08:31 AM
dragracer28 dragracer28 is offline
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How about a NTC3 + RB 28 + a 3-speed. Bet that will go about 100
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  #180  
Old 05-19-2004, 09:56 AM
cretin cretin is offline
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i think control of ludicrous speed will be more of an issue that merely achieving said ludicrous speed.

when it comes down to it, all that matters is what guinness requires.
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  #181  
Old 05-19-2004, 01:23 PM
Janders Janders is offline
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the beer?
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  #182  
Old 05-19-2004, 01:39 PM
mwcet8k mwcet8k is offline
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Quote:
Originally Posted by KMac
For all the guys who aren't satisfied with the rules, either start your own contest or don't show up to this one because nobody else that's there having a great time and marvelling at each other's technical achievements is going to want to hear your complaining.
Relax man. There's nothing wrong with constructive feedback. Especially when the event is more than a year away.
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  #183  
Old 05-19-2004, 01:51 PM
KMac KMac is offline
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Constructive feedback is one thing; continuing on after the rulesmaker has clarified and re-clarified the rules is just complaining. It ruins the "spirit" of the entire contest.
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  #184  
Old 05-19-2004, 01:55 PM
KMac KMac is offline
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Quote:
Originally Posted by cretin
i think control of ludicrous speed will be more of an issue that merely achieving said ludicrous speed.

when it comes down to it, all that matters is what guinness requires.

I agree wholeheartedly. I firmly believe capable cars will be hitting the wall or flipping, etc....... and self-destructing due to the sheer speeds and aerodynamics involved. I'm predicting that if a car has to take a full lap of the track to get up to speed that it won't even make it back to the speed traps to be clocked officially. (Assuming that the speed will be 120 mph+)
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  #185  
Old 05-19-2004, 02:03 PM
Popop Popop is offline
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Dimensions of the track are greatly welcomed as for a pix or two of both the surface and the halls
(I could prepare a proto for that occasion if the organizers do this part of the job / See nautical SAW events for example)

I suppose that the driver has not to be the car maker
(In that case a So-cal friend of mine could drive my car)

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  #186  
Old 05-19-2004, 02:06 PM
KMac KMac is offline
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Food for thought:

1. Can a nitro engine successfully drive a generator to provide the voltage & current required for an electrically powered car such that you can eliminate all the batteries?

2. Electric cars generally don't use 2-speeds as they would quit shifting towards the end of the battery cycle; BUT for this contest multiple speeds should be able to be used successfully.

3. Can a large capacity capacitor be used to either provide ALL of the power necessary to reach the top speed?--or--can one be used just to accelerate the car through the gears and batteries take over from there?--or--can it be used for the final "boost" from a battery-maintained high speed to your top speed?
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  #187  
Old 05-19-2004, 02:40 PM
cretin cretin is offline
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1. sullivan makes on board charging systems for airplanes. but i disagree with the hybrid idea. to convert energy twice (fuel to electricity to motion) is inefficient. also, remember that weight isn't that big of an issue here. to a point, more weight is good. it is better to get your downforce from weight than from drag.
2. agreed
3. if a capacitor would work, i'm sure the drag racers would be using them.
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  #188  
Old 05-19-2004, 02:43 PM
Interstate Interstate is offline
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I thought they used their batteries like capacitors, with micro switches and such.
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  #189  
Old 05-19-2004, 04:01 PM
Viperrgh2 Viperrgh2 is offline
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umm didnt some make an rc go 200 mph they had it on an oval track and it was attached to a rope .. does it have to go in a straight line and be able to turn on its own..
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  #190  
Old 05-19-2004, 04:11 PM
mwcet8k mwcet8k is offline
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That wasn't actually an RC car. It was just a gas powered car that was attached to a line, sort of like those model airplanes kids play with. You just start up the engine and let it go in circles until it runs out of fuel. It did go like 200 mph though.
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  #191  
Old 05-19-2004, 05:18 PM
Giant655 Giant655 is offline
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if any of you really wanted to go uptown, you could drop a jet turbine engine into an RS4, or something like that, and basically make it an engine with wheels, have a can-am/streamliner body, because when speeds get that high, its more of a design/aerodynamics thing moreso than a biggest engine wins type thing
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  #192  
Old 05-19-2004, 06:43 PM
Interstate Interstate is offline
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Well that'd be nice, but as it says in the rules, no thrust powered cars. Steve Pond even furthered this by proving their lower stability.
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  #193  
Old 05-20-2004, 12:40 AM
Chris LaPanse Chris LaPanse is offline
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Here's what I would do (if I could get to CA). Custom 1/8 scale chassis with:
64 AA cells (for light weight/space), 2x Lehner 2240 or 2250 (high turn), each driving one rear wheel DIRECTLY, standard 1/8 body with clipped wing, and a LOT of room to get up to speed. If the motors could pull 25,000 rpms under load, then it could hit (getting out the calculator here) about 160-170 mph with a power of over 5000 watts. This would be interesting to see, and you would have almost NO drivetrain losses (best part). The hardest part would be the custom chassis. I wonder if anyone will attempt something like this?
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  #194  
Old 05-20-2004, 01:01 AM
GForce GForce is offline
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Is anybody using a drag car (rail, funnycar or pro stock) for this competition?
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  #195  
Old 05-20-2004, 08:33 AM
DaFF DaFF is offline
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Look @ this graph, this little 2240/7 Lehner motor can put out almost 1.8 KW ( 0.736 Kw = 1 hp ) under 33 volt.

Watch the torque too : more than 57 N.cm, that means a lot of torque and burns out LoL

Best of all, the efficiency is in the 93% mark, which means that this thing will get every drop (or mA for that matter) out of your battery down the road. To top it all, it means too a reliable, low temp type motor.

Rpm are in the 35 000, which is nearly half way through the rpm limit of this motor.

Now we are talking !



DFF
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  #196  
Old 05-20-2004, 11:17 AM
cretin cretin is offline
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turbines can be used in a wheel-driven application. loach helicopter engines are used in many custom built vehicles (150 pounds and make over 300hp), and they are the power source for the millenium 2k motorcycles. the fastest one of those has been ridden is 265, which is when they ran out of airport. jay leno has one of them (along with at least one of everything else he wants). strapping a turbine to a mad force and hooking it to the three-speed for this challenge would be awesome, but perhaps a bit on the expensive side.
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  #197  
Old 05-20-2004, 02:20 PM
Sigurd Ruschkow Sigurd Ruschkow is offline
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Hi,

I have one of those motors. It is not that small !

You can suck out much more power than the diagram shows. The diagram just ends at that current as Lehner cannot suck more current out of his measurement system.

We in the boating business use more power that 1800 Watts :-)

Extreme Speed Electrical Car


Sigurd



Quote:
Originally Posted by DaFF
Look @ this graph, this little 2240/7 Lehner motor can put out almost 1.8 KW ( 0.736 Kw = 1 hp ) under 33 volt.

Watch the torque too : more than 57 N.cm, that means a lot of torque and burns out LoL

Best of all, the efficiency is in the 93% mark, which means that this thing will get every drop (or mA for that matter) out of your battery down the road. To top it all, it means too a reliable, low temp type motor.

Rpm are in the 35 000, which is nearly half way through the rpm limit of this motor.

Now we are talking !



DFF
Extreme Speed Electrical Car
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  #198  
Old 05-20-2004, 02:23 PM
Sigurd Ruschkow Sigurd Ruschkow is offline
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A Lehner 2240 or 2250 could spinn 50 000+ rpms at full load.

I have them, and used them.
For boats. SAW.

Extreme Speed Electrical Car


Sigurd

Quote:
Originally Posted by Chris LaPanse
Here's what I would do (if I could get to CA). Custom 1/8 scale chassis with:
64 AA cells (for light weight/space), 2x Lehner 2240 or 2250 (high turn), each driving one rear wheel DIRECTLY, standard 1/8 body with clipped wing, and a LOT of room to get up to speed. If the motors could pull 25,000 rpms under load, then it could hit (getting out the calculator here) about 160-170 mph with a power of over 5000 watts. This would be interesting to see, and you would have almost NO drivetrain losses (best part). The hardest part would be the custom chassis. I wonder if anyone will attempt something like this?
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  #199  
Old 05-21-2004, 12:35 AM
Chris LaPanse Chris LaPanse is offline
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There would be much more load while driving a car directly (no gears) than when driving a prop directly, so you would need a 14, 15 or mabye even 16 turn motor. Besides, if it could do 160 at 25000 rpm, imagine what it could do at 50000 rpm.


Also, a 2250 DOES NOT turn 50000+ rpm under load. The 120 mph boat driven by Joerg had "only 48000 prop RPM. Still, it would be incredible to see what these cars could do.
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  #200  
Old 05-21-2004, 04:43 AM
DCLXVI DCLXVI is offline
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Quote:
Originally Posted by Sigurd Ruschkow
Hi,

I have one of those motors. It is not that small !

You can suck out much more power than the diagram shows. The diagram just ends at that current as Lehner cannot suck more current out of his measurement system.

We in the boating business use more power that 1800 Watts :-)

Extreme Speed Electrical Car


Sigurd




Extreme Speed Electrical Car

I will be so happy and proud if you manage to break the record! More glory for us Swedes

Lycka till!
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