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11-28-2006, 10:26 AM
| #1 |
| Say hello to my dactylion  Join Date: Jun 2004 Location: On the Boat to Whore Island
Posts: 4,470
|  UTRCRC Scale/Trail Runner Class RTI Ramp
UTRCRC Scale/Trail Runner Class RTI Ramp In Utah we are starting a Scale/Trail Runner class and we will be incorporating a maximum RTI score for all Scale/Trail competitors. To run in our "STR" events the maximum score you can have will be set at 500. Score 500 or less on a 30 deg RTI ramp and you are good. We will have a 30 deg ramp at all the UTRCRC Scale/Trail Runner events. I thought all of you guys here at RCC would like to see the RTI ramp I threw together with some scrap aluminum this holiday weekend:     Last edited by PinchFlat; 01-02-2009 at 09:54 PM. |
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11-28-2006, 10:32 AM
| #2 |
| Rock Stacker Join Date: Nov 2006 Location: Callahan
Posts: 70
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that is awsome...nice flex...
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11-28-2006, 10:38 AM
| #3 |
| RCC Addict Join Date: Sep 2005 Location: ...Here & There
Posts: 1,590
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That looks good & strong. Good idea! Just for a comparison... What are the RTI scores for those two rigs? |
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11-28-2006, 10:46 AM
| #4 | |
| Say hello to my dactylion Join Date: Jun 2004 Location: On the Boat to Whore Island
Posts: 4,470
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Thanks guys... Quote:
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11-28-2006, 10:49 AM
| #5 |
| I wanna be Dave Join Date: Jan 2004
Posts: 5,027
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Pinchy.....how do you determine what is "scale" and what is not? PS. I pm'd you. check it! |
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11-28-2006, 12:55 PM
| #6 |
| Sinking with the ship   Join Date: Mar 2005 Location: El Capitan...sole survivor and sinking fast
Posts: 8,864
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Dude, that is very cool  I have been meaning to do some sort of RTI ramp but havent had the time... and you made this out of scrap??  |
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11-28-2006, 01:13 PM
| #7 | ||
| Say hello to my dactylion Join Date: Jun 2004 Location: On the Boat to Whore Island
Posts: 4,470
| Quote:
Quote:
Actually we are trying to figure that out right now. The RTI score is based on average RTI scores of 1:1 rigs that I found around the internet. 500 on a 30 deg ramp was a good score for most of the 1:1 street legal trail rigs I found. Check this out for more info on our full scale requirements we are working out right now: http://www.utrcrc.com/phpBB2/viewtopic.php?t=443 -checking PM now. | ||
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11-28-2006, 02:43 PM
| #8 | |
| I wanna be Dave Join Date: Jan 2004
Posts: 5,027
| Quote:
a lot of guys out here have been talking about a similar class but I just couldn't see how it would work because the scale thing is so objective. I like the idea of having to pass the Pinchy test to be able to compete in that class. | |
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11-28-2006, 02:52 PM
| #9 |
| I wanna be Dave  Join Date: Dec 2005 Location: Happiness is a warm AK.
Posts: 12,563
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Hmmmm, Maybe you should post the dimensions for that ramp. We have several interested in a scale class as well. We could use the "Pinche" test as one of our requirements. It could be the GOLD standard! |
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11-28-2006, 02:59 PM
| #10 | |
| Say hello to my dactylion Join Date: Jun 2004 Location: On the Boat to Whore Island
Posts: 4,470
| Quote:
I'll get the measurements up tonight. | |
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11-28-2006, 03:11 PM
| #11 | ||
| RCC Addict Join Date: Sep 2005 Location: ...Here & There
Posts: 1,590
| Quote:
Quote:
PinchFlat the pioneer... | ||
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11-28-2006, 04:06 PM
| #12 |
| I wanna be Dave Join Date: Jun 2004 Location: Whales
Posts: 2,939
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Ya ya the ramps cool... Did you sweep your porch for that shot? Thats so weird......  |
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11-28-2006, 04:21 PM
| #13 |
| Rock Crawler Join Date: Nov 2005 Location: Fremont/Newark, California
Posts: 710
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How is a score established using one of these?
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11-28-2006, 04:31 PM
| #14 |
| I wanna be Dave Join Date: Dec 2005 Location: Orlando
Posts: 7,420
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Awesome whip pinchy,looks killer!
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11-28-2006, 04:57 PM
| #15 | |
| Say hello to my dactylion Join Date: Jun 2004 Location: On the Boat to Whore Island
Posts: 4,470
| Quote:
The formula used to determine the RTI of you vehicle is as fallows: Distance traveled up the ramp (just before one of the tires lifts off the ground - measured perpendicular to the ground from the axle nut, not where the tire patch makes contact with the ramp). DIVIDED BY The wheelbase of the vehicle. Then MULTIPLIED BY 1000. EXAMPLE: Your rig traveled up the ramp 5" and your wheelbase is 11.5" so... 5 (divided by) 11.5 = 0.4347 and 0.4347 x 1000 = 434.7 (435 rounded up). So your RTI is 435. I chose 30 deg because that seems to be the latest for the 1:1 rig and for someone who wants to build one that os an easyer angle to figure I think. Keep in mind a 20 deg ramp will give you a different RTI score, but the formula will be the same for any angle ramp. | |
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11-28-2006, 04:59 PM
| #16 | |
| Say hello to my dactylion Join Date: Jun 2004 Location: On the Boat to Whore Island
Posts: 4,470
| Quote:
And Brett... Your Mama Sweeped it off for me.  | |
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11-28-2006, 05:07 PM
| #17 | |
| Rock Crawler Join Date: Mar 2004 Location: Where it's wet
Posts: 833
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...or maybe it's because im still bitter about the "old school" class I dropped 1500 large on, that never happened  Awesome ramp | |
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11-28-2006, 05:40 PM
| #18 | |
| Say hello to my dactylion Join Date: Jun 2004 Location: On the Boat to Whore Island
Posts: 4,470
| Quote:
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11-28-2006, 11:01 PM
| #19 | |
| Rock Stacker Join Date: May 2006 Location: Over there >>>
Posts: 53
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i dint sweep anything lol (my name).and thats cool man nice work | |
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11-29-2006, 12:13 AM
| #20 |
| Say hello to my dactylion Join Date: Jun 2004 Location: On the Boat to Whore Island
Posts: 4,470
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The dimensions are... ...|...- ...|.........- 16" 8"|...............- ...|______________- .......... 14" and the ramp is 2.75" wide I hope that makes sence. Last edited by PinchFlat; 11-29-2006 at 12:21 AM. |
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