Humla
Newbie
Hi all.
I live on the ice planet Hoth... that's Norway.
I built my first super crawler this winter and here are some images and a video. I also list all specifications and some comments.
I first bought a 1/10 scale crawler, but did see some sexy images on the Internet of what they call super class crawler. So I said to myself -where can I buy one? Well... that's 6 months ago. It has been alot of reading, searching, waiting, building etc since then. For a newbe like me it was alot of "what!?" and "aha!" to learn. Like super class crawlers you more or less build yourself. And some of the parts are almost impossible to buy new, so you can buy used or make them yourself. Like the wheels, links, servo mounts etc. You need alot of tools and patience. Soldering the transmitter, upgrade the firmware, learn to program the transmitter, program the ESC's, calibrate all the stuff... Ok, enough talk about that. One last point, I first bought the cheap Outcry dual motor ESC. But that ESC was not good enough. The car was shaking and jumping one slow speed. Not going so slow as I wanted etc. So I upgraded to 2x Holmes Hobbies TorqueMaster BR-XL and what a different!
Here you can find a video at Youtube:
https://www.youtube.com/watch?v=n8v9-elc99E
Here is an image of the car completed: (well, never 100% completed I fell...)
Here are "all" the specs. I list alot so other newbies can maybe get some start help. BUT! I am not a expert, I am a newbie mayself, so ask for advice at this forum or you can buy alot of stuff you don't need. Just like I did
Name: HUMLA (Bumblebee in Norwegian)
RC car scale: Super class Crawler, 1/8 scale.
Axles: RC4WD Super Bully Light Weight Axle (65:1 gear ratio)
Pinion gear: 10T
Motors: 2x Holmes Hobbies TorqueMaster Pro 540, 45T
ESC's: 2x Holmes Hobbies TorqueMaster BR-XL
BEC's: 2x Castle Creations BEC 10A (6.4 voltage set)
Servo's: 2x Hitec HS-7955TG
Battery: Haiyin 3S (11.1v) Lipo 1600mAh - 30C
Battery case: Homemade 1mm aluminium, painted black.
Run time: 30-45 minutes
Transmitter: FlySky FS-GT3B (with firmware hack/updated for 3-8 channels)
Receiver: FlySky 6CH RX (using 4 channels, 2 steering and 2 throttle/ESC)
Chassis: Chaotic Crawlers Super Switch (width expanded with 2 cm, homemade 1mm alu. panels)
Wheel rim: HPI Blast Wheel (narrowed from 70mm to 45mm)
Tires: Hot Bodies Sedona 2.2 (cut and glued for HPI 115mm diameter wheels)
Wheel complete: diameter near 8 inch = 20 cm
Wheel base = ca 17 1/4 inch = 44 cm
Shocks: From RC4WD, Spark Comp Shock with Ti Shaft (110mm)
Links: Homemade 6mm aluminium rod (drill and tap for rod ends), painted black.
Servomounts: Homemade 2x2mm=4mm aluminium, painted black.
Bumpers: Homemade 2mm aluminium, painted black.
Motor protection plate: 1mm aluminium, painted black.
Knuckle weights: 2x Blue Monkey Knuckle Weights for Bully Super (100 gram pr. wheel/knuckle)
Chassis colour: Tamiya Camel Yellow
Weight: 4.3 kg with battery and a total of 400 gram knuckle weights.
Max speed: With todays setup (45T motor, 10T pinion, 65:1 gear, 8 inch wheels, 3S lipo) around "fast walk" 7 km/h.
Else: Lots of reading, worktime, ESC and transmitter tuning, tools, glue, paint, money.
Weak points:
- Links: not perfect drill and tapping. Titanium links would also be some stronger.
- Hitec 7955TG works ok, but maybe a bit stronger Hitec 7950TH servos or the some bigger HS7980TH would be optimal.
Here is my programming of the Holmes Hobbies TorqueMaster BR-XL ESC's
In the next post I will add some images from the building.
I live on the ice planet Hoth... that's Norway.
I built my first super crawler this winter and here are some images and a video. I also list all specifications and some comments.
I first bought a 1/10 scale crawler, but did see some sexy images on the Internet of what they call super class crawler. So I said to myself -where can I buy one? Well... that's 6 months ago. It has been alot of reading, searching, waiting, building etc since then. For a newbe like me it was alot of "what!?" and "aha!" to learn. Like super class crawlers you more or less build yourself. And some of the parts are almost impossible to buy new, so you can buy used or make them yourself. Like the wheels, links, servo mounts etc. You need alot of tools and patience. Soldering the transmitter, upgrade the firmware, learn to program the transmitter, program the ESC's, calibrate all the stuff... Ok, enough talk about that. One last point, I first bought the cheap Outcry dual motor ESC. But that ESC was not good enough. The car was shaking and jumping one slow speed. Not going so slow as I wanted etc. So I upgraded to 2x Holmes Hobbies TorqueMaster BR-XL and what a different!
Here you can find a video at Youtube:
https://www.youtube.com/watch?v=n8v9-elc99E
Here is an image of the car completed: (well, never 100% completed I fell...)
Here are "all" the specs. I list alot so other newbies can maybe get some start help. BUT! I am not a expert, I am a newbie mayself, so ask for advice at this forum or you can buy alot of stuff you don't need. Just like I did
Name: HUMLA (Bumblebee in Norwegian)
RC car scale: Super class Crawler, 1/8 scale.
Axles: RC4WD Super Bully Light Weight Axle (65:1 gear ratio)
Pinion gear: 10T
Motors: 2x Holmes Hobbies TorqueMaster Pro 540, 45T
ESC's: 2x Holmes Hobbies TorqueMaster BR-XL
BEC's: 2x Castle Creations BEC 10A (6.4 voltage set)
Servo's: 2x Hitec HS-7955TG
Battery: Haiyin 3S (11.1v) Lipo 1600mAh - 30C
Battery case: Homemade 1mm aluminium, painted black.
Run time: 30-45 minutes
Transmitter: FlySky FS-GT3B (with firmware hack/updated for 3-8 channels)
Receiver: FlySky 6CH RX (using 4 channels, 2 steering and 2 throttle/ESC)
Chassis: Chaotic Crawlers Super Switch (width expanded with 2 cm, homemade 1mm alu. panels)
Wheel rim: HPI Blast Wheel (narrowed from 70mm to 45mm)
Tires: Hot Bodies Sedona 2.2 (cut and glued for HPI 115mm diameter wheels)
Wheel complete: diameter near 8 inch = 20 cm
Wheel base = ca 17 1/4 inch = 44 cm
Shocks: From RC4WD, Spark Comp Shock with Ti Shaft (110mm)
Links: Homemade 6mm aluminium rod (drill and tap for rod ends), painted black.
Servomounts: Homemade 2x2mm=4mm aluminium, painted black.
Bumpers: Homemade 2mm aluminium, painted black.
Motor protection plate: 1mm aluminium, painted black.
Knuckle weights: 2x Blue Monkey Knuckle Weights for Bully Super (100 gram pr. wheel/knuckle)
Chassis colour: Tamiya Camel Yellow
Weight: 4.3 kg with battery and a total of 400 gram knuckle weights.
Max speed: With todays setup (45T motor, 10T pinion, 65:1 gear, 8 inch wheels, 3S lipo) around "fast walk" 7 km/h.
Else: Lots of reading, worktime, ESC and transmitter tuning, tools, glue, paint, money.
Weak points:
- Links: not perfect drill and tapping. Titanium links would also be some stronger.
- Hitec 7955TG works ok, but maybe a bit stronger Hitec 7950TH servos or the some bigger HS7980TH would be optimal.
Here is my programming of the Holmes Hobbies TorqueMaster BR-XL ESC's
In the next post I will add some images from the building.