Advice on building my first LCG rig Hi, After 2 RTR-s, I am looking for advice on building my first LCG rig. Goals:
I plan to start with the following parts:
What do you think about this? Does it make sense? My biggest concern is the “extra” 1.92 gear ratio in the portals, combined with the 3 gear transmission. Final Drive Ratio is 90 (huge difference to stock Capra FDR of 25). Is the FDR 90 OK? Will it work with the selected motor? On 2S? The second concern (that I’ll just have to try and see, I guess), is this frame too flat for the portals? Would I be better off with this one instead? The motor and the axles are the most expensive parts, these are the ones I least want to replace. Thanks for any advice. Don’t hold it back! PS. I am in Europe, some parts (e.g. a delrin skid) are not as easy to come by as in the US. |
Re: Advice on building my first LCG rig I can say for sure that Stealth X + Capra Axles + SE 1800 on 2S = almost unbelievably slow. Like... sub 2mph wide open. Even with tiny spur and huge pinion I think you'd struggle to get to mid-3s. You're building yourself a 4S rig, IMO. Change out that SE for some flavor of AM32 and a low to mid 2000s outrunner and you've got a weapon. I just recommend against 2S no matter what avenue you choose. |
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Do you mean that even 3s is out with the Capra axles? Even if I pick a faster motor like e.g. Holmes Hobbies Revolver V3 2200 Kv? |
Re: Advice on building my first LCG rig Following as a newbie. |
Re: Advice on building my first LCG rig I am not ready to give up on the SE 1800 yet (great value, no whining, available where I live). Nor on the portals, yet. I am also convinced of 3s, but want to stop there. I can fix the portal reduction from 1.92 to 1.50 with overdrive gears. With 3s, this will get me to ~4mph which I think I can live with - if not, there comes 4s. |
Re: Advice on building my first LCG rig ... or I can just pinion up like you said, e.g. go from the stock 18/87 to 33/72, and leave the portals alone. This cancels out the portal. I am learning... |
Re: Advice on building my first LCG rig The fusion models are only rated for a 3s battery. so if your backup plan is going to 4s your going to need a whole new power system. Or this, I did something similar. Made a custom tube buggy from some scx10.3 axles I had laying around paired it with a Axial 3 gear transmission not realizing that the portal gears really gear it down. I'm running a fusion pro 2300kv so my motor is faster. I used a traxxas trx4 45 tooth spur gear and drilled out the center to fit the 3 gear and tighten down the nut so it doesn't slip. Put a 22 tooth pinion on the motor and now speeds are ok for trailing. I'm not sure how the stealth transmission works so your results may differ. |
Re: Advice on building my first LCG rig 2 Attachment(s) Opps forgot pics |
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So, change of backup plan. I have two options to gear up, pinion/spur and the portals. With the 33/72 pinion/spur alone, I can bring down the Final Drive Ratio to 40. This should be enough. If not, I do the portal overdrive too. I think you went from from 13/56 to 22/45 -> you geared up 2.10x, this cancels the portal geardown of 1.92. I plan to do the exact same: go from 18/87 to 33/72 -> gear up 2.21x. |
Re: Advice on building my first LCG rig I have just found this 9imod outrunner and this RhinoESC on AliExpress. Cheaper than the Fusion. Do I need the longer 3542, or I can get away the shorter 3532? |
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i also run alot more reduction than a 3 gear on portals in my opinion the heavy gear reduction is really nice and also kinda needed with a outrunner and the top end is fine for a crawler with a ultra light lcg i would say go with the smaller 3532 it will have slightly better start up and wont make as much noise |
Re: Advice on building my first LCG rig Have you run the rhino esc's ferp? |
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Re: Advice on building my first LCG rig Thanks ferp420! I will go for the smaller 3532. Having a separate ESC, changing the motor became a lot cheaper. And I decided to go 4s too. I spent the last two days educating myself on this and now I see that this is the way to go. (Thanks again DrIsotope.) I have ordered the parts and I am sitting on pins and needles now. I am pretty confident that I will meet my original goal of flexibility. If something is not right (which I expect to happen), I will be able to fix it cheap and easy. Wish me luck! |
Re: Advice on building my first LCG rig |
It's alive! Finally, it's alive! Anyone who gave advice, thank you - you are part of this. |
Re: It's alive! Quote:
Its against the stars |
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