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Old 12-06-2013, 03:10 AM   #9751
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Hi Hummer Man,

InspGadgt is spot on - you have a choice on how to structure your local F1 class.

In most circumstances the wider F1 cars on foams are faster than narrow F1s on rubber. Both can be tricky to set up and drive, so if you get the sweet spot with a rubber car then it will fly.

The F103 or F104W are fine choices for wide foam. I'd also add the 3Racing F109 which was cheap and forgiving to drive, and some secondhand bargains are now out there.

Whatever you decide have fun racing your F1s
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Old 12-06-2013, 06:03 AM   #9752
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Locally we've adopted the UF1 standards for 190mm width, F104 rubber tires, 21.5 motor and approved Blinky ESC. An F103 with F104 rear tires/wheels and an F104 front end meets the width requirement. The F103 and F104 rear axle assembly are the same width. The rear wheel offset and tire width are what make the car so wide in back. The 104 front end just bolts right in. You will need a new front wing though as the F104 pushes the wheels further forward and they will rub on the wing. You will need F104 front end: wheel bearings, shorter steering linkage, king pins, ball studs and front arm set. The front axles and uprights from the F103 are the same. It is a slightly shorter wheelbase car when completed. If you want a narrow car on the cheap, convert an old F103.
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Old 12-06-2013, 06:41 PM   #9753
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Most clubs have accepted the UF1 standards or a modified version of them in the US. Outside of the US is where you will more often see the 200mm wide cars with foam tires. Our club allows 180mm, 190mm, and 200mm but the tires must be rubber. The rubber tires made for the F103 just are not as grippy as those made for the F104 so the wide cars are at a disadvantage. While our club allows a variety of sizes...we strongly encourage the UF1 standards.
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Old 12-08-2013, 02:46 PM   #9754
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Default The Eagle has landed....

actually, it should be landing fairly soon. Here's something that might excite a few of you...


http://www.rctech.net/forum/12795217-post444.html
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Old 12-08-2013, 05:29 PM   #9755
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actually, it should be landing fairly soon. Here's something that might excite a few of you...


http://www.rctech.net/forum/12795217-post444.html
I can't wait for this!!!
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Old 12-08-2013, 05:34 PM   #9756
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Now we're talking.
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Old 12-08-2013, 09:15 PM   #9757
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Originally Posted by InspGadgt View Post
Most clubs have accepted the UF1 standards or a modified version of them in the US. Outside of the US is where you will more often see the 200mm wide cars with foam tires. Our club allows 180mm, 190mm, and 200mm but the tires must be rubber. The rubber tires made for the F103 just are not as grippy as those made for the F104 so the wide cars are at a disadvantage. While our club allows a variety of sizes...we strongly encourage the UF1 standards.
Have you tried the Ride soft tires for the F103 ? When TQ Raceway in Chino, California ran a 200mm rubber tire class about 2-1/2 years ago, I was running my F103 on Tamiya A rears and the Ride soft fronts. I tried Shimizu F103 soft fronts and the car pushed like a snow plow. When most of us switched to the 180mm F104, there was one guy who still ran the 200mm F103 and with both on rubber tires, the 200mm F103 was an advantage. Totally agree that the Shimizu rubber is the money tire for F104's but not so for the F103's.

This season, Sean brought back a 200mm wide F1 foam tire class with 17.5 blinky. Two words.....insane fun !

Panda
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Old 12-08-2013, 09:31 PM   #9758
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Back in the 103 days we ran Rides and they were pretty good but still didn't compare to how the 104s feel today. Our problem with the Shimizus isn't a push but no rear grip on the 103.
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Old 12-08-2013, 09:31 PM   #9759
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actually, it should be landing fairly soon. Here's something that might excite a few of you...


http://www.rctech.net/forum/12795217-post444.html
Damn dude that looks awesome!
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Old 12-08-2013, 09:55 PM   #9760
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Foam Tire Question

Should front tires ever be larger than the rears? Why or why not?
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Old 12-09-2013, 01:03 PM   #9761
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Foam Tire Question

Should front tires ever be larger than the rears? Why or why not?
Ideally the rears should be larger that the front tyres, or the same size. There difference between the two is known as stagger.

What I know from World GT & 12th pan car classes is more tyre stagger slows down rotation in corners, and less increases rotation. Taken to its extreme with larger tyres then in theory the car would over rotate and be hard to drive.

I say in theory as I have run larger foams on the front of an F109 and didn't notice as much difference as I would have with a WGT or 12th.

If you run the same make of F1 rubber tyre front and rear then I wouldn't get hung up on this.

Hope that helps
Mark
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Old 12-09-2013, 02:53 PM   #9762
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Default Stagger

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Originally Posted by MarkBurgess View Post
Ideally the rears should be larger that the front tyres, or the same size. There difference between the two is known as stagger.

What I know from World GT & 12th pan car classes is more tyre stagger slows down rotation in corners, and less increases rotation. Taken to its extreme with larger tyres then in theory the car would over rotate and be hard to drive.

I say in theory as I have run larger foams on the front of an F109 and didn't notice as much difference as I would have with a WGT or 12th.

If you run the same make of F1 rubber tyre front and rear then I wouldn't get hung up on this.

Hope that helps
Mark
Stagger in the US is a right to left difference in tire diameter/circumference. commonly used in oval racing but sometimes used in road racing when there are more or more important turns in one direction than the other. I have never heard of "stagger" in reference to front/rear differences. (But that doesn't necessarily mean it cannot be...)
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Old 12-10-2013, 12:49 PM   #9763
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Originally Posted by aarcobra View Post
Stagger in the US is a right to left difference in tire diameter/circumference. commonly used in oval racing but sometimes used in road racing when there are more or more important turns in one direction than the other. I have never heard of "stagger" in reference to front/rear differences. (But that doesn't necessarily mean it cannot be...)
In the US then yes it is a term I relate to oval racing for the difference in right to left hand side tyre sizes. I picked it up from a road UK meeting for the difference in front to read tyre sizes. I celebrate our diversity

To be honest it doesn't really matter what you call it
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Old 12-10-2013, 01:33 PM   #9764
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Quote:
Originally Posted by aarcobra View Post
Stagger in the US is a right to left difference in tire diameter/circumference. commonly used in oval racing but sometimes used in road racing when there are more or more important turns in one direction than the other. I have never heard of "stagger" in reference to front/rear differences. (But that doesn't necessarily mean it cannot be...)
Quote:
Originally Posted by MarkBurgess View Post
In the US then yes it is a term I relate to oval racing for the difference in right to left hand side tyre sizes. I picked it up from a road UK meeting for the difference in front to read tyre sizes. I celebrate our diversity

To be honest it doesn't really matter what you call it
We typically refer to that as "split" here in the U.S.
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Old 12-10-2013, 03:32 PM   #9765
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Hi guys, what color for Sauber C32?
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