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SkaldidDog’s T1E Rockshow “RTICUL8”

SkaldidDog

2013 2.2P Nat. Champion
Joined
Sep 1, 2009
Messages
2,584
Location
BorderLine Crawlers Season 3 is on!
T1E Rockshow chassis (no cage)<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>
T1E rear links<o:p></o:p>
All other links custom<o:p></o:p>
V1 Berg axles (clocked 25 deg, front minus 5 deg for caster) with <o:p></o:p>
Stock bearings<o:p></o:p>
CKRC rear lockouts with axle (the old ones, not 6mm)<o:p></o:p>
CKRC high steer knuckles<o:p></o:p>
Axial stubs, stock front axles<o:p></o:p>
HH 45T motors<o:p></o:p>
Chemical bottle skids<o:p></o:p>
Hitech 7950 servo (6.5V)<o:p></o:p>
Robotronic aluminum servo arm<o:p></o:p>
Butyl rubber servo arm bumper<o:p></o:p>
Custom servo mount/front upper link bracket<o:p></o:p>
Custom steering tie rod and drag link (Revo ends)<o:p></o:p>
Modified rear upper link bracket<o:p></o:p>
CCBEC<o:p></o:p>
CC Sidewinder Micro ESC’s <o:p></o:p>
TH1320 3s lipos<o:p></o:p>
Custom front battery mount<o:p></o:p>
T4PK<o:p></o:p>
HPI Firestorm shocks (with shortened Traxxas Revo GTR shock ends for cap mod, Traxxas rod end on other end of shock shaft and spring adjusters ground down on the front). All shocks are unlimited and are 3.80” eye center to eye center full extended.<o:p></o:p>
Modified front lower shock mount<o:p></o:p>
25wt shock oil<o:p></o:p>
HPI Firestorm springs (Front pink, rear red)<o:p></o:p>
ProLine Crowd Pleazer shell (severely butchered and painted up nice)<o:p></o:p>
16 ga Deans wire with Novak silver solder<o:p></o:p>
All silver hardware replaced with black, except for wheel hubs…I don’t like chrome<o:p></o:p>
Vanquish DH fronts (460), 4 SS wts each<o:p></o:p>
Vanquish SLW 1” rears (350)<o:p></o:p>
Hot Bodies Rovers soft<o:p></o:p>
NovasArk 2.2 foams, unmodified <o:p></o:p>
Dimensions:<o:p></o:p>
WB: 13 7/16”<o:p></o:p>
Chassis clearance at front of skid: ~3 ½ ”<o:p></o:p>
Font axle total width: 11 ¼”<o:p></o:p>
Rear axle total width: 10 ¾”<o:p></o:p>
Weight:5.75 lb<o:p></o:p>
***I’ll upgrade to Super300s and RCaxlemaster 6mm rear axles as soon as I can find some for sale. Any help here would be appreciated.<o:p></o:p>
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Hey y’all,<o:p></o:p>
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NC/SC native residing in Sandy Eggo CA. Love the weather, not hippies. This is my first crawler and I’m hooked. I had been driving this rig for several weeks dig-less and just got my 4PK set up this week. What a difference. First, thanks a bunch to JeepinDoug (clocking tool, drill guides), NovasArk (foams), JRH (motors and break in advice), Rockshow (chassis/links) and Harley0607 for 4PK setup assistance. I can’t recall who originated the idea of the servo recessed into the top of the front axle but thanks for the idea (maybe 86Jeep?). Thank you to all that post on this site. Your insights have helped tremendously. I love the off color avatarsJ.<o:p></o:p>
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This build took a lot of time. I’m anal. I’ve learned that crawler geometry is all about compromise and personal preference. I’ve settled on a fully suspended lower COG/ride height vs elevated belly or droop rig for enhanced breakover. My rig has no droop to speak of (maybe 1/8 inch). I went though several full sets of custom links, battery locations and servo mounts/steering systems before it was all done. I did a lot of in cerebro testing and dry running before actually hooking up the electronics and driving it. Slow to the finish line yes, but least I learned a lot in the process. The steering throw and axle articulation are respectable. Some may think the articulation is excessive but I like it and it doesn’t strand me twisted in half.
Comments on vendor parts
Please see reply below...it put me over the word limit for one post.
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Comments on custom parts<o:p></o:p>
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Steering: I went through two custom steering setups and three servo mounts before settling in on the ones pictured. The piece of rubber on the servo arm protects the arm during falls. It actually works. The key feature of my steering setup is the dainty little 3/8 plate delrin tie rod flanked by 0.220” aluminum plates with two flange bearings and a spacer in each one (AvidRC bearings MF63ZZ 3x6x2.5 Flanged Metal, custom hardened spacer). All parts were machined with a file, vice, jig saw, drill and elbow grease. The flange bearings float the tie rod like a feather. No binding or slop and the drag link isn’t supporting the tie rod and nor is the tie rod riding on the axle gear case. The knuckles spin effortless on the bearings. It’s is quite light compared to comparable aluminum and metal systems. As you can imagine there is very little tie rod flex except during falls/impacts…but it will flex, not bend…which is the beauty of plastic over metal. I think it is safe to say that I won’t be doing any additional beefing up of my steering system. The servo will fail before it does. The steering throw is respectable. The stock dog bones bind just as the tires slightly rub the shocks springs. Even with Super300s I don’t think I’ll get too much more steering throw due to the tires rubbing on the shock springs. I tried moving the shocks in but, during articulation, they and the lower links bind on the gear housing and the end of the motor. Again geometry is a about compromise.<o:p></o:p>
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<?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" /><st1:place w:st="on">Battery</st1:place> and mount: I liked the idea of the battery on an extended lower front skid plate but I didn’t like the shock compression due to the entirely sprung battery weight. So I made a angled mount sling (0.020” lexan) and hung it from the front uppers (attached with zip ties) and used Velcro and an o-ring to hold the battery in place. I stored excess wire inside the mount. I wrapped the battery in shrink wrap, Gooped on some aluminum ears for the o-ring to hold onto and a 0.020” lexan plate to the belly of the battery to act as a skidplate. This moves half of the battery weight to unsprung and keeps it low, angled and forward.<o:p></o:p>
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Thanks again for all of your help. I look forward to learning from all of you and will hopefully make my way to a comp or two to meet some fellow crawlers. Any comments, suggestions or constructive criticism on my rig would be appreciated. <o:p></o:p>
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Cheers,<o:p></o:p>
<o:p></o:p>
SkaldidDog

PS...Photos are in random order.
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SkaldidDog comments on purchased parts


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<o:p></o:p>Chassis: Awesome. I decided against using the Rockshow roll cage because, with body panels/hardward/paint, it was twice as heavy as the shell and elevated the COG. <o:p></o:p>
ESCs: Killer. Sidewinder Micros rock. Small, light, great drag, cheaper than FXRs, love the Castle software (used it for my MambaMonster for a year now and the updates keep getting better) and best of all…they are Castle products…no exploding caps and phenomenal service if you need it. I’ve never tried Tekin FXRS and don’t have plans to…unless someone conclusively shows that drag brake is a function of the ESC, not the motor magnets. Only downside to the Micros is that you don’t have the flexibility to solder wires on in any direction which makes for less tidy wiring.<o:p></o:p>
Servo: Good so far, runs warm under abuse (110F+) at 6.5V, may back it down to 6V.<o:p></o:p>
Motors: Wow. Smooth with gigantic gonads and drag brake. Thanks JRH for the helpful details around a proper break in.<o:p></o:p>
Radio. Sweeeeet. One heck of a nervous system. Get one. Only wish that the timer start and stop could be set to some switches other than PS1 and PS2. With dual ESC’s on PS1 and PS2, the timer function can not be used (at least I can’t figure it out). Help here would be appreciated. Also elevated the relief of PS2 with a custom rubber pad (Gooped in place) so that it is more easy to actuate. <o:p></o:p>
 
Last of the purchased products comments

Wheels: Excellent Vanquish craftsmanship. Top shelf.<o:p></o:p>
Foams: Thanks Eddie. I’m new to crawling but NovasArk foams stomp a mud hole in stock Rover foams and F400 foams. I installed them without modifying them at all via a custom tire compression jig. The severely oversized/compressed dense inner foam gives the tires wonderful backbone. However, I’m still learning the art and science of Foamology and the currently en vogue yet controversial oversized sidewall rings look to have some advantages. I’m enjoying the ongoing debates.<o:p></o:p>
Shell: Yeah baby!<o:p></o:p>
Shocks: Work well, smooth.<o:p></o:p>
Tires: Wearing out quickly.<o:p></o:p>
Batteries: Great. Last for 30+ minutes of hard beating. Maybe too large for comps but I’m learning to drive with them for now.<o:p></o:p>
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Looks good. If you plan on entering any comps your wheelbase is to long; 12 1/2 when pushed down and rebounds. good luck
 
Looks good. If you plan on entering any comps your wheelbase is to long; 12 1/2 when pushed down and rebounds. good luck

Thanks. Good eye on the length. I'd like to comp some day My mistake on the length. It's 12 and 7/16ths. I was measuring from the 1" mark on my measuring tape and didn't subtract 1" from the final length. I moved the front shocks out one hole last night which lifted the belly 0.2" and shortened it a tad. I think I'm in the clear now.
 
Nice ride brotha "thumbsup" im diggin the steering set-up . . i like the chopped up body too . . but i dont think it looks legal . . but i could be wrong
 
NICE build, i think he is talking about the lenght,looks like you cut too much off? the body must be 12.5 long as well and 3"tall on the sides and 5" in the center across the top. but man great looking build man i'm liken it. i think i am getting ready to buy on of them there chassis and was kinda thinking along the lines of buy it as the whole rockshow and poss not run the cab like you are doing!"thumbsup"
 
NICE build, i think he is talking about the lenght,looks like you cut too much off? the body must be 12.5 long as well and 3"tall on the sides and 5" in the center across the top. but man great looking build man i'm liken it. i think i am getting ready to buy on of them there chassis and was kinda thinking along the lines of buy it as the whole rockshow and poss not run the cab like you are doing!"thumbsup"

Thanks CC,

Y'all are spot on...this shell is not legal. I'll chef up a new one. I butchered the nose off this one to fit an older steering setup that has gone the way of the dodo. I actually liked the looks better with more shell and I'm kinda glad that I'm going to re-do it. I like the shell-over chassis because it takes a beating better (flexes and slides) than a solid cage. Being a new driver, a tough helmet is a must.
 
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