Badger's Vaterra Twin Hammers 1.9 Rock Racer

[Badmuthatrucker]

Originally Posted by badger

If you want to do slow controlled crawling with it then yes I think you should have a sensored brushless motor, if you plan on doing more rock racing and bashing then a sensorless brushless system like the Traxxas Velineon because it is truly waterproof. I personally don't like Castle stuff, I've done nothing but burn it up.

Something I've been thinking about regarding this, is if anyone is going to use a conventional fast brushless system like a Velineon, observe the C rating of those little flight pack lipos that they use.

If you have a system that under load can surge up to 60 amps or more, it won't do a 2000 mah 25C battery much good. You'll need to get either a high discharge flight pack or one of those shorty packs like Badger is using.

[chevotafun]

Originally Posted by badger

Very cool! What are your plans for batteries? The stock 2000 mAh lipo does not provide much run time with the stock brushed motor. If you plan on sticking with 2s lipo then I would get a couple shorty lipo's to give you more run time. I'm getting at least 45 minutes with the Tekin ROC 412 and 3s 2200 lipo's.

Which KV Roc you useing?
I have the 3300kv that i just got that was going to go into my truggy but now with my twin hammer coming i don't know which one it should go into,

Hows the top speed with the ROC in it now?

THanks
Mike

[cravo]

Originally Posted by badger

- I'm pretty sure your brushless system will fit in the Twin Hammers, the chassis should have enough room for the SC8 ESC.
- I left the suspension stock which is pretty soft in the rear so it doesn't take high speed corners to sharp without barrel rolling it. You could easily stiffen up the suspension to make it take high speed corners better but then it wouldn't soak up the rough terrain as well as it does at high speeds.
- Unfortunately I ruined the stock electronics before I got to mount the GPS on it. I'm guessing it went about 15 MPH, maybe 17 tops.


The Tekin RS / ROC 412 brushless system is amazing in the Twin Hammers, so much power and fun! The drivetrain has held up fine to the brushless power. I don't understand your question regarding neutral position, why would you need to put the trasmission in neutral?

Norcal 2500HD came over today and put 500,000 weight in the front diff. It helped some with crawling but I think if you really wanted to hard core rock crawl with it you'll want to install the locker. The stock diff oil definitely made it easier to control at high speeds but I didn't mind it at all, Norcal 2500HD couldn't drive in a straight line to safe his life and as with every other RC he would turn every straight away into a chicane.


I have not opened the transmission up yet but I am guessing they are mostly plastic as it doesn't sound like a all metal gear tranny does. The driveshafts have held up great to a lot of abuse, they are metal. As I mentioned above the drivetrain is holding up great to the abuse we gave it.

If you want to do slow controlled crawling with it then yes I think you should have a sensored brushless motor, if you plan on doing more rock racing and bashing then a sensorless brushless system like the Traxxas Velineon because it is truly waterproof. I personally don't like Castle stuff, I've done nothing but burn it up.

Thanks for your kind reply Badger. Maybe the internal gears are plastic or a mix of plastic and metal (as the wraith, one is metal and two are plastic) but who cares? As long as they dont break its awsome.
The metal drivelines are a great feature in this car.
Sorry you have had problems with castle, i dont. And no issues whatsoever. I put a mamba max with a castle sct motor the 2400kv 4 pole run it in sand, foffinf with 4s lipo two 2s packs plugged in series no fan on the motor and average temp 30 degrees, after one hour and half the motor was warm to the touch. As for sensored, its best but with castle link set the start throtle curve down to 50% and dont use more than 2 in timing advance settings. Because on 4pole motors you will not gain increase in speed above 2 and you only increase heat. Both lipos used were two turnigy nanotech 5800mah with 40c discharge. With those settings you can crawl with almost no cog, to improve it better you can use one 2s lipo to crawl and bump it to 4s in series for bashing.
Cheers
Cravo

[SubyJeff]

Originally Posted by badger

Very cool! What are your plans for batteries? The stock 2000 mAh lipo does not provide much run time with the stock brushed motor. If you plan on sticking with 2s lipo then I would get a couple shorty lipo's to give you more run time. I'm getting at least 45 minutes with the Tekin ROC 412 and 3s 2200 lipo's.

This is my very first RC, so i'm a complete noob I haven't driven an RC car since I was 6~ years old.
I'm going to research batteries today so I can either order online or buy from hobbytown when I go tomorrow
or if you have a link and say "buy this", that might help me!

[sally1800]

Originally Posted by SubyJeff

This is my very first RC, so i'm a complete noob I haven't driven an RC car since I was 6~ years old.
I'm going to research batteries today so I can either order online or buy from hobbytown when I go tomorrow
or if you have a link and say "buy this", that might help me!

True RC

11.1V 2200mAh Li-polymer battery 11.1V 2200mAh Li-polymer battery [3S1P2200_30C] - $39.99 : True RC, Li-polymer batteries, chargers and accessories

[johnnyh66]

I like Value Hobbies cheap GForce lipo's: Value Hobby R/C Hobby Store (Bensenville, Illinois): Batteries - Power

[Turn'Nburn]

Originally Posted by johnnyh66

I like Value Hobbies cheap GForce lipo's: Value Hobby R/C Hobby Store (Bensenville, Illinois): Batteries - Power

Yep, great lipos for cheap, and fast cheap shipping.

[bonedog]

In stock Horizon Hobby

Sent from my SGH-T989 using Tapatalk 2

[nissan_driver24]

Originally Posted by cravo

Thanks for your kind reply Badger. Maybe the internal gears are plastic or a mix of plastic and metal (as the wraith, one is metal and two are plastic) but who cares? As long as they dont break its awsome.
The metal drivelines are a great feature in this car.
Sorry you have had problems with castle, i dont. And no issues whatsoever. I put a mamba max with a castle sct motor the 2400kv 4 pole run it in sand, foffinf with 4s lipo two 2s packs plugged in series no fan on the motor and average temp 30 degrees, after one hour and half the motor was warm to the touch. As for sensored, its best but with castle link set the start throtle curve down to 50% and dont use more than 2 in timing advance settings. Because on 4pole motors you will not gain increase in speed above 2 and you only increase heat. Both lipos used were two turnigy nanotech 5800mah with 40c discharge. With those settings you can crawl with almost no cog, to improve it better you can use one 2s lipo to crawl and bump it to 4s in series for bashing.
Cheers
Cravo

I find it really hard to believe a sensorless motor while crawling wouldn't cog so I call BS & I'm 100% sure with that kind of setup you can not drive down anything without free wheeling on throttle.

Sensorless Brushless setups should never be in a crawler unless you're just bashing it and want cheap speed...

[ElBandito]

Originally Posted by johnnyh66

I like Value Hobbies cheap GForce lipo's: Value Hobby R/C Hobby Store (Bensenville, Illinois): Batteries - Power

Thanks for the link. I love that website. Will be ordering my batts for the TH from them.

[rocresq]

Originally Posted by nissan_driver24

I find it really hard to believe a sensorless motor while crawling wouldn't cog so I call BS & I'm 100% sure with that kind of setup you can not drive down anything without free wheeling on throttle.

Sensorless Brushless setups should never be in a crawler unless you're just bashing it and want cheap speed...

Outrunner brushless work great, just run out of top end

[Harley]

Originally Posted by rocresq

Outrunner brushless work great, just run out of top end

Even the old outrunners would still COG. They were better than any sensorless inrunner but still cogged. Still hoping Holmes can nail the sensored outrunner.

[SubyJeff]

Originally Posted by ElBandito

Thanks for the link. I love that website. Will be ordering my batts for the TH from them.

which are you getting?
i just read this huge lipo battery faq with really good info Understanding RC LiPo Batteries

would this one be good to get? Value Hobby R/C Hobby Store (Bensenville, Illinois): GForce Elite Series 30C 2200mAh 3S 11.1V LiPO
or maybe a 2600?

[theclimber]

what about this battery?
Turnigy nano-tech Shorty 4200mah 2S2P 65~130C Hardcase Lipo Pack (ROAR APPROVED)

[SubyJeff]

maybe we need a twin hammers battery thread? hehe

[Norcal_GIT_r]

Originally Posted by theclimber

what about this battery?
Turnigy nano-tech Shorty 4200mah 2S2P 65~130C Hardcase Lipo Pack (ROAR APPROVED)

I ordered two of those yesterday for my twin hammers.
I think they should be great for this rig.

[ElBandito]

I ordered 3 of these
https://www.valuehobby.com/review/pr...20#review-form

[SubyJeff]

Originally Posted by ElBandito

I ordered 3 of these
https://www.valuehobby.com/review/pr...20#review-form

is 25C better than 30C for the twin hammers?

[jkwrangler08]

The higher the C rating the more amperage a battery can provide. I would think the stock motor and ESC would be fine on a 25c. Add in an aftermarket motor and high speed bashing and you might want to go higher.

[LGrocks]

Originally Posted by Norcal_GIT_r

I ordered two of those yesterday for my twin hammers.
I think they should be great for this rig.

Isn't 65c too much punch? Or am I wrong about punch & C rating?