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Old 11-02-2017, 07:42 PM   #21
Quarry Creeper
 
Join Date: Feb 2016
Location: Santa Maria, CA
Posts: 487
Default Re: Wraith trans choices for sand/dunes

All I came up with in 32p for a 1/8" shaft was a 20t... so a little more grinding in the motor mount slots and 20/54 it was! To recap: AE2 ESC, 4s, 12t Titan 550, 20/54, high ratio (1.8:1) transmission, 4) 5 1/4" paddles.

Now, I know those of you following along knew how this would end before it even started, but it only made it maybe 30' across my lawn before smoking the motor. Lot's of smoke. Like "I hope the neighbors don't call the fire department" smoke. This is not a good application for a 550 brushed motor. Back to the drawing board... or, rather, the shelf.
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Old 11-11-2017, 05:48 PM   #22
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Default Re: Wraith trans choices for sand/dunes

I've been playing around with parts that I already have, trying to find a new direction for this car. I'd really like to get more use out of this, so I'm going to let go of the high powered paddle tired setup and go back to brushed with crawler-esque tires. I have no desire to switch this over to a dedicated crawler, rather something I can bash around the yard, or when camping, but still be able to crawl along side my son's Redcat. Surprisingly, none of my 2.2"s clear the steering on this, but I have a set of 1.9"s that do.

Now, ar60's are too wide for my 4.4" tires even with .225 hubs, and the wheelbase is too long, but I think I like the 1.9" wheel itself. Currently considering the 5.4" tall Proline boggers and sticking with .225 hubs. I did find one build that used those tires on ar60's and it looked alright, but I'm hoping the narrower hubs will make it look more proportional. KJ's Toyzuki Bronco

I determined that my AE2 doesn't like me, so I borrowed a Hobbywing wp860 out of another one of my cars. With a 20t motor and 16/87 gearing on 4s, it is just a touch fast (just over 20mph) but didn't have the grunt I wanted on 3s. Switching to a borrowed titan 21t, it's about as fast as I would want on 4s, but was still running a little hot at about 150. I think 15-20mph is getting pretty close to the handling limits of a narrow tire Wraith with stock-ish suspension and I want to end up somewhere in that range. The way I see it, I can either go 3s with a 21t 550 (which I've run in my old Wraith with stock transmission gearing), or 4s with a 27t 550. I'll need to buy a new esc either way, so I can either go with another wp860 with CC bec (like I am currently borrowing) and run 4s, or stick to 3s and go with the ever popular wp1080. I found that 4s can easily make the tightened down clutch slip when crawling, where you'd have to be driving pretty carelessly to make it slip on 3s. Maybe 3s is just the way to go?

I feel like I have ADD with this car, too many rc projects and life distractions does that I guess.
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Old 11-18-2017, 03:17 AM   #23
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Default Re: Wraith trans choices for sand/dunes

Woohoo! My wife picked up a set of the 5.4" Proline Boggers (among other rc goodies!) for me tonight, but I'll have to wait until Christmas to open them. I did at least get a chance (before she hid everything from me) to hold them up next to a stock 2.2 Ripsaw, the 1.9" Boggers are every bit as tall and may even be taller once I squeeze them on to 1" wide wheels. So stinkin cool lookin'! That pretty much sealed the deal for the direction this car is headed. I'm just a set of RC4WD blue/proline rings and a WP1080 away from being up and running with its own parts again.
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Old 12-30-2017, 02:28 AM   #24
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Default Re: Wraith trans choices for sand/dunes

I got the 5.4"/1.9" Proline Boggers mounted up to my Chinese KMC 222's using RC4WD "proline compatible" rings. I didn't even try mounting them with the standard inner rings that came with the wheels, but I'm wondering if that might have gone a bit smoother? Either way, they're all mounted up, using the stock proline foams, they're too soft as expected. I'll try out my 4 1/4" Deuce's Wild foams and a layer of soft proline foam wrapped around that when I'm bored with a few hours to kill.

I also got a new SSD Dana 60 front diff cover that finished off my AR60 very nicely, just had to file a tiny bit of it down so it would play nice with my Dlux U4 truss.

I got the WP1080 mounted under the hood along with the Radiolink receiver, light controller, and ginormous brick of 3s. I switched the 1080's battery plug to Deans (even though I like the XT60 better) just because all of my other cars/ batteries already use Deans. I cut the esc's motor leads shorter and soldered on 4mm bullets so that the connection is easily accessible right under the electronics tray. I soldered on extra long leads to the motor using silicone wire and 4mm bullets, and ground a flat spot in the shaft of a new Electifly S600 19t 550 brushed motor.

I was a bit disappointed to find that neither my 10 nor 12 tooth pinions could get proper mesh with the 54t spur, so I had to go with a 14t for now. I knew that would be pretty tall gearing (for crawling) along with my high ratio transmission, but I gave it a shot anyway. With the drag brake off, the car was a hoot in open terrain, topping out right around 20mph while still being pretty easy to keep on all 4... But it got hot quick when I asked much of it in the rocks. Too hot. More magic smoke! I have another 19t 550 on its way already (giving the Redcat branded one a try this time) along with a Robinson 58t steel spur (from what I could find, this should just barely fit under the cover) which will at least let me run 12/58, and hopefully even 10/58.

Besides killing another motor due to nothing other than over gearing, the car does fairly well in my backyard boulder field. Stiffer foams, lower gearing, and a narrower track width ought to get things moving in the right direction. I don't think LURC's .185" hubs will work with my homemade ackerman arms (though I'm tempted to order some anyway) but a .225 should. I just need to find a reasonable balance of gearing between top speed and motor temperature while crawling now.

I'll try to make those changes in the coming week and report back.
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