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02-22-2015 | 07:09 AM
Desert Rat says most of it is wrong, others say it's right on...I'd like to hear what everyone has to say on what's wrong or what could be improved or updated.
02-22-2015 | 09:55 AM
Hello all, I am fairly new to 12th scale end of things. I have 1 big question that I cant seem to find the answer for. I am running a Hobbywing xerun v3.1 esc along with a Novak ballistic 17.5, but for the life of me I cant get the esc to stay running on a 1s. I have tried the receiver pack/bec but have not had any luck. Thanks for your imput.
02-22-2015 | 11:38 AM
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No real reason, except that I've gotten conflicting information on the front spring information recently. It's actually worked pretty well for me in general over the years. Just thought I would get some input and put a new version up for others to use. (or better yet, beg Martin Crisp to put it in his setup app so I can use it there).
Desert Rat says most of it is wrong, others say it's right on...I'd like to hear what everyone has to say on what's wrong or what could be improved or updated.
Desert Rat says most of it is wrong, others say it's right on...I'd like to hear what everyone has to say on what's wrong or what could be improved or updated.
http://www.rctech.net/forum/13683922-post41706.html
02-23-2015 | 05:49 AM
You're right, this is a great post. Definitely puts it into perspective.
Since were discussing the mental mindsets we develop to build and tune cars I'll bring up a point I haven't sen addressed. Most if not all of the settings we change on model cars can be envisioned as a linear number line laid over a roof top. Lets say side spring stiffness from softest like an AE black or CRC .45 on the left side of the roof to an AE red or CRC .60 on the right side. The direction you want to adjust the stiffness of the side spring depends on which side of the roof peak you're on. The roof peak is our optimal setting. In addition the roof peak is not always in the center of the scale and also moves as other changes to the car are made. For example (this is hypothetical for the sake of explaining my thought) in modified 12th in high traction the peak of the roof is generally skewed to the far left which leads to the use of soft springs to avoid lifting inside rear tires. The peak can move dependent on several factors such as grip level, vehicle speed, and track configuration. This helps to explain how two drivers can make opposite changes in different conditions and both feel that they added grip. Their racing environment placed their original settings on opposite sides of the roof peak and while one went with stiffer springs, or lube or whatever and the other person went softer, they were both moving towards the peak of the roof for their specific set of circumstances. Food for thought...
02-23-2015 | 12:30 PM
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http://www.brca.org/sections/subsect...ationals/24542
Lots of great information from the BRCA. guys.
what is confusing to me though is the rollouts quoted for 13.5. I would consider a rollout of around 85mm to be typical here in Canada, but the Brits seem to be using much lower gearing.
Whats going on? Any Brits care to chime in?
Lots of great information from the BRCA. guys.
what is confusing to me though is the rollouts quoted for 13.5. I would consider a rollout of around 85mm to be typical here in Canada, but the Brits seem to be using much lower gearing.
Whats going on? Any Brits care to chime in?
02-23-2015 | 12:46 PM
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From: Fort Collins, CO
http://www.brca.org/sections/subsect...ationals/24542
Lots of great information from the BRCA. guys.
what is confusing to me though is the rollouts quoted for 13.5. I would consider a rollout of around 85mm to be typical here in Canada, but the Brits seem to be using much lower gearing.
Whats going on? Any Brits care to chime in?
Lots of great information from the BRCA. guys.
what is confusing to me though is the rollouts quoted for 13.5. I would consider a rollout of around 85mm to be typical here in Canada, but the Brits seem to be using much lower gearing.
Whats going on? Any Brits care to chime in?
02-23-2015 | 01:38 PM
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There are videos from some of the rounds. The layouts look fantastic.
It just seemed to me that 70-75mm rollout is remarkably low regardless of the track layout.
02-23-2015 | 01:53 PM
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Posts: 1,586
From: Lutz, FL
http://www.brca.org/sections/subsect...ationals/24542
Lots of great information from the BRCA. guys.
what is confusing to me though is the rollouts quoted for 13.5. I would consider a rollout of around 85mm to be typical here in Canada, but the Brits seem to be using much lower gearing.
Whats going on? Any Brits care to chime in?
Lots of great information from the BRCA. guys.
what is confusing to me though is the rollouts quoted for 13.5. I would consider a rollout of around 85mm to be typical here in Canada, but the Brits seem to be using much lower gearing.
Whats going on? Any Brits care to chime in?
Monti
02-23-2015 | 02:14 PM
The way I set up my roll out with a new motor is to go out with a baseline, say 76 with 42.5mm tires and X pinion. If my car keeps getting faster as my tires get smaller without changing pinion, then that means the roll out is too high (as the roll out obviously decreases with smaller tires). Typically when I have a new motor, I ill keep the pinion the same until I find the "sweet Spot".
With the actiniums we tried 80 as a start and they were dogs, and seemed to get faster as the roll out got smaller. Eventually I settled for 72 and ran like that for a while. One day I started with smaller tires than what I typically would (41.5) and a 72 roll out. That particular day I was lazy and did not change my pinion, and on the 3rd run, the car came alive. I came back and did the math, and the Roll out happened to be at 68. The guys locally that run D4s/TP/Reedy are back more around the conventional 78-84 range.
So the moral to the story is that every motor is different. Add the fact that timing also plays a big role in all of the equation and the answers to do it correctly are several. Much like with AWD's "peaks" analogy ( I call it a bell curve), there are multiple correct ways of doing this and getting good results.
02-24-2015 | 08:31 AM
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Our track is fairly flowing and medium sized. Personally I run a 68 roll out with 58* of timing on an Actinium 13.5. It would be close with an R1 as well. Now, if I am running a D4, the roll out would be between 78-84 typically. Each motor seems to have different characteristics.
The way I set up my roll out with a new motor is to go out with a baseline, say 76 with 42.5mm tires and X pinion. If my car keeps getting faster as my tires get smaller without changing pinion, then that means the roll out is too high (as the roll out obviously decreases with smaller tires). Typically when I have a new motor, I ill keep the pinion the same until I find the "sweet Spot".
With the actiniums we tried 80 as a start and they were dogs, and seemed to get faster as the roll out got smaller. Eventually I settled for 72 and ran like that for a while. One day I started with smaller tires than what I typically would (41.5) and a 72 roll out. That particular day I was lazy and did not change my pinion, and on the 3rd run, the car came alive. I came back and did the math, and the Roll out happened to be at 68. The guys locally that run D4s/TP/Reedy are back more around the conventional 78-84 range.
So the moral to the story is that every motor is different. Add the fact that timing also plays a big role in all of the equation and the answers to do it correctly are several. Much like with AWD's "peaks" analogy ( I call it a bell curve), there are multiple correct ways of doing this and getting good results.
The way I set up my roll out with a new motor is to go out with a baseline, say 76 with 42.5mm tires and X pinion. If my car keeps getting faster as my tires get smaller without changing pinion, then that means the roll out is too high (as the roll out obviously decreases with smaller tires). Typically when I have a new motor, I ill keep the pinion the same until I find the "sweet Spot".
With the actiniums we tried 80 as a start and they were dogs, and seemed to get faster as the roll out got smaller. Eventually I settled for 72 and ran like that for a while. One day I started with smaller tires than what I typically would (41.5) and a 72 roll out. That particular day I was lazy and did not change my pinion, and on the 3rd run, the car came alive. I came back and did the math, and the Roll out happened to be at 68. The guys locally that run D4s/TP/Reedy are back more around the conventional 78-84 range.
So the moral to the story is that every motor is different. Add the fact that timing also plays a big role in all of the equation and the answers to do it correctly are several. Much like with AWD's "peaks" analogy ( I call it a bell curve), there are multiple correct ways of doing this and getting good results.
Ok. Thanks Cristian, some great advice there.
I've got to be honest I had no idea people were running 50deg of timing let alone 58. I don't doubt that's the explaination.
02-24-2015 | 11:05 AM
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CRC, Xray, Serpent, TOP, Speedmerchant, VBC, AE......all are truly excellent cars, each with their subtle nuances, loyal followings, and all fully capable of winning races. With regard to cost, there is little doubt that the CRC car is the least expensive of the lot. CRC's parts supply and customer support is excellent too. And it sure doesn't hurt that their latest edition (the XTI-WC, used by Mark Reinhardt to win the recent World Championships) works great right out of the box, without need for extra cost options or upgrades. Honestly, you can't go wrong with any of today's current edition side link cars. As compared to other forms of RC racing, 1/12th scale is a very cost effective way to have great fun provided that there is a carpet venue convenient to wherever you live.