OSRC
I wanna be Dave
Every now and again a build comes along that makes me question everything I know about crawling. This is one.
It's a nearly 20 year old Tamiya TL01. I'm using a Tamiya mini motor/2S on a 3:1 reduction, comical series arms and dogbones for a but extra width, locked diffs and portals on all 4 corners, slightly longer Tamiya CVA's, pitbull tires, and SSD wheels with brass rings up front to balance out the rear motor.
It's been built forever, but this is the first time out. The gearing worked out spot on for crawling and trail duty. The mini motors make RPM but not torque, so they have to be geared down a bit but they make nice smooth power once you find the gearing sweet spot.
I only have a little over an inch of travel at each wheel do there's not a lot of flex. The CG is rediculously low, and it turned out to be super predictable. It teetered a few times, but was always able to drive out of it no problem.
Sitting at the bottom of the hard line on my test rock..
Where it proceeded to walk right up it. I was absolutely stunned...only 2 trucks this year have made it up this line, even some of my best trucks won't do it. I actually turned around and drove back down which I have never been able to do - I always get a nosedive off that top lip. The CG here is so low, this build just sticks to the rock. It looses grip way before it wants to flip, so it was super stable. Floored.
Straight up, sidehill, no problem. Might lift a tire here and there, but the stability was unreal.
"Flex shot"... lol. Such as it is.
Down on test rock #2 - down and up, drama free.
The open body lets the tires grab pretty easily and I made some decent gaps.
Creek crossing?? Well...stream crossing. Wasn't going any deeper, the non waterprrof receiver is just taped to the bottom of the chassis under the ESC.
Was working my way up some pretty rough terrain and one of the ball links came loose. A quick field repair and I was back on it for about 30 seconds and LVC kicked off.
Subjective scores:
Crawlability - 10: Gotta give it a 10. Literally walked up some of my hardest climbs. Freaking Tamiya touring car.
Trailability - 7: Very good! Clearance was a concern, but with the portals it wasn't really an issue. Just had to pick the lines carefully, but had no trouble going where I wanted to go. Does need a bit more suspension travel though.
Steering - 7: Not terrible. Uses dogbones up front but with such a short WB it was penty nimble. It's light, so the servo had no trouble at all.
Sexy factor - 8: I like it. I'm thinking of scaling it up a bit, but overall it's a cool looking build.
Uniqueability - 10: What moron takes a TL01 crawling?
Total 8.4
It's a nearly 20 year old Tamiya TL01. I'm using a Tamiya mini motor/2S on a 3:1 reduction, comical series arms and dogbones for a but extra width, locked diffs and portals on all 4 corners, slightly longer Tamiya CVA's, pitbull tires, and SSD wheels with brass rings up front to balance out the rear motor.
It's been built forever, but this is the first time out. The gearing worked out spot on for crawling and trail duty. The mini motors make RPM but not torque, so they have to be geared down a bit but they make nice smooth power once you find the gearing sweet spot.
I only have a little over an inch of travel at each wheel do there's not a lot of flex. The CG is rediculously low, and it turned out to be super predictable. It teetered a few times, but was always able to drive out of it no problem.
Sitting at the bottom of the hard line on my test rock..
Where it proceeded to walk right up it. I was absolutely stunned...only 2 trucks this year have made it up this line, even some of my best trucks won't do it. I actually turned around and drove back down which I have never been able to do - I always get a nosedive off that top lip. The CG here is so low, this build just sticks to the rock. It looses grip way before it wants to flip, so it was super stable. Floored.
Straight up, sidehill, no problem. Might lift a tire here and there, but the stability was unreal.
"Flex shot"... lol. Such as it is.
Down on test rock #2 - down and up, drama free.
The open body lets the tires grab pretty easily and I made some decent gaps.
Creek crossing?? Well...stream crossing. Wasn't going any deeper, the non waterprrof receiver is just taped to the bottom of the chassis under the ESC.
Was working my way up some pretty rough terrain and one of the ball links came loose. A quick field repair and I was back on it for about 30 seconds and LVC kicked off.
Subjective scores:
Crawlability - 10: Gotta give it a 10. Literally walked up some of my hardest climbs. Freaking Tamiya touring car.
Trailability - 7: Very good! Clearance was a concern, but with the portals it wasn't really an issue. Just had to pick the lines carefully, but had no trouble going where I wanted to go. Does need a bit more suspension travel though.
Steering - 7: Not terrible. Uses dogbones up front but with such a short WB it was penty nimble. It's light, so the servo had no trouble at all.
Sexy factor - 8: I like it. I'm thinking of scaling it up a bit, but overall it's a cool looking build.
Uniqueability - 10: What moron takes a TL01 crawling?
Total 8.4