Kyosho Ultima RB6 & RB6.6 Car Thread
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#8432
Sounds pretty expected as it will increase overall roll, much like a very significant lowering in roll center.
#8434
Well, it ACTS like more roll, and it should roll a BIT more, but the real change is the change in force against the track at the tire due to leverage change from decreased lever arm distance from the roll center (or just centerline of the car) and the tire contact patch. It will roll more because bringing in the tire brings in the tire contact patch, which if you draw all the "roll center lines" and connections, that lowers the roll center. Also, if you just think about it in terms of the shorter lever arm, much like having a long vs short kick stand on a bike, the short one is easier to tip over than the long one.
Wayne
Wayne
#8435
Wayne
#8437
Tech Elite
iTrader: (14)
Hi All
what's the secret to a smooth RB6 gear diff? I've just built one and it's "grainy", you can basically feel the teeth working against each other... I've built my share of 8th scale gear diffs, but I have to say I'm not an expert in dinky plastic ones. I've used a bit of lithium grease at strategic locations (outdrive, ring, gears) everywhere where there's friction and/or a risk of leaking, I've considerably greased/oil the plastic seal, I haven't overfilled it, blah blah blah, the works, then AE's 3K oil.
And still the thing feels like crap (and it leaks)... Do these things need to break-in or what? I 8th you break them in for a couple of hours to loosen them up, but here it's worst, it really feels wrong...
Thanks
Paul
what's the secret to a smooth RB6 gear diff? I've just built one and it's "grainy", you can basically feel the teeth working against each other... I've built my share of 8th scale gear diffs, but I have to say I'm not an expert in dinky plastic ones. I've used a bit of lithium grease at strategic locations (outdrive, ring, gears) everywhere where there's friction and/or a risk of leaking, I've considerably greased/oil the plastic seal, I haven't overfilled it, blah blah blah, the works, then AE's 3K oil.
And still the thing feels like crap (and it leaks)... Do these things need to break-in or what? I 8th you break them in for a couple of hours to loosen them up, but here it's worst, it really feels wrong...
Thanks
Paul
#8438
Hi All
what's the secret to a smooth RB6 gear diff? I've just built one and it's "grainy", you can basically feel the teeth working against each other... I've built my share of 8th scale gear diffs, but I have to say I'm not an expert in dinky plastic ones. I've used a bit of lithium grease at strategic locations (outdrive, ring, gears) everywhere where there's friction and/or a risk of leaking, I've considerably greased/oil the plastic seal, I haven't overfilled it, blah blah blah, the works, then AE's 3K oil.
And still the thing feels like crap (and it leaks)... Do these things need to break-in or what? I 8th you break them in for a couple of hours to loosen them up, but here it's worst, it really feels wrong...
Thanks
Paul
what's the secret to a smooth RB6 gear diff? I've just built one and it's "grainy", you can basically feel the teeth working against each other... I've built my share of 8th scale gear diffs, but I have to say I'm not an expert in dinky plastic ones. I've used a bit of lithium grease at strategic locations (outdrive, ring, gears) everywhere where there's friction and/or a risk of leaking, I've considerably greased/oil the plastic seal, I haven't overfilled it, blah blah blah, the works, then AE's 3K oil.
And still the thing feels like crap (and it leaks)... Do these things need to break-in or what? I 8th you break them in for a couple of hours to loosen them up, but here it's worst, it really feels wrong...
Thanks
Paul
Last edited by offroad dude; 10-17-2013 at 08:51 AM.
#8440
Tech Champion
iTrader: (73)
Well, it ACTS like more roll, and it should roll a BIT more, but the real change is the change in force against the track at the tire due to leverage change from decreased lever arm distance from the roll center (or just centerline of the car) and the tire contact patch. It will roll more because bringing in the tire brings in the tire contact patch, which if you draw all the "roll center lines" and connections, that lowers the roll center. Also, if you just think about it in terms of the shorter lever arm, much like having a long vs short kick stand on a bike, the short one is easier to tip over than the long one.
Wayne
Wayne
#8441
To me this description doesn't make sense, but it sounds like you are describing the effects correctly. The leverage points doesn't move with a bar, you are adding a second spring, if you will, which yes, it attached at a different point, but unless you go with a softer spring, the net results is stiffer roll resistance.
#8442
Yeah, I was not talking about the sway bar. Dunno how we got wires crossed there. I was talking about narrowing the rear end.
#8443
Tech Adept
Use the Kyosho gear and seal grease KYOXGS151...I put it in the o-rings as well as on the paper seal and I have minimum to no oil in my case
#8445
Tech Elite
iTrader: (14)
thank you
Paul