My baja 5E....sort of - Page 2 - RC-Monster Forums

lydiasdad · 02.23.2008, 08:53 PM

Thanks for all the positive feedback! As for the controller, I need motor braking.

@lincpimp: That sounds like a good idea for a chassis. I noticed the baja's chassis is incredibly stiff. No flex what-so-ever. So I tried to design something strong and rigid yet light weight. My chassis is pretty solid, but I plan on adding a couple more aluminum stand-offs where my batteries are going.

BL_RV0 · 02.24.2008, 01:08 AM

id suggest the 100a turnigy, but you need motor brakes.... wny not some rear discs on the wheels? itll handle 12s. get a pair of 6s. and a series connector... and a kb45xl....

**Steering? -** 03.18.2008, 08:20 PM

How do u plan to mount the steering servo?

lydiasdad · 03.18.2008, 08:22 PM

The servo is aready mounted on the front upper deck. I have several runs on it already.

SpeedAssault · 03.18.2009, 08:07 PM

Quote:

Originally Posted by lincpimp

That is very interesting!

i am in te process of making a very similar buggy using emaxx chassis components. My chassis will be a welded steel tube affair, with lots of cross bracing and a solid skid in the center.

I am still in the design phase and an trying to get a good chassis design figured out. I may even fab up a sheet steel box section that will run from the front bulk to the rear, and then weld some outrigger tube sections to that. Or it may be all tube with a sheet steel center skid (prefered design).

I am going to go with a 4wd setup most likely, and use a center diff. That way I can have fornt and rear mech brakes and use a kb45 motor on 8s-10s lipo. Need a big motor to move this beast around!

I also have a different All4wd creation and looking for a good power plant and what to use for center diff and if do a front diff ?

lydiasdad · 03.18.2009, 09:38 PM

I know i said this before but new vids are coming soon, I promise.

Its a lot faster with the kb-45 8l motor instead of the wanderer 9xl and I got the flm 7075 diff cup. So far the diff is holding up after 5 or so full runs. I think i'm going to get a kb45-10xl motor as it's slightly over geared as it is. With 200 less kv and more torque I think it will be the ticket. Thanks for the complements guys.

**Hv110 -** 03.18.2008, 06:10 PM

Quote:

Originally Posted by Mod Man

Go with a HV110. Phenominal controller and almost infinately adjustable.

Matt

I agree with Mod Man, go with the hv110, sure no brakes, but who needs brakes anyway! But really, if u need brakes, i have seen projects in which they use disc brakes on each wheel.

lydiasdad · 03.18.2008, 07:39 PM

Quote:

Originally Posted by Fast5sRevo88

I agree with Mod Man, go with the hv110, sure no brakes, but who needs brakes anyway! But really, if u need brakes, i have seen projects in which they use disc brakes on each wheel.

I think I'm leaning towards the kontronik 55-10-32 to use with my mega 22/45/2, I would run 10s or 11s a123 with that. I assume it runs the mega ok. I also contemplated a nue and quark on my 6s2p a123. 6s2p would technically have more power than 10s1p because of the extra cells. Decisions Decisions.

othello · 03.18.2008, 08:08 PM

Well maybe this could be interesting for you. This is a video showing my 10s1p A123 + jazz55 + Neu 1515/2Y setup compared to a 6s2p A123 + MGM 16018 + Neu 1515/1Y setup. Both truggys do wheigh around 11lbs. The truggy with 6s2p used a 1.4sek ramp up time. Nonetheless he could easely keep up with the very "brutal" ramp up time of the Jazz. The 6s2p setup is slightly faster due to higher rpms and gearing choice.

Temperature of both motors were about the same at the end of the run (60 degree C). The 1Y was finned and passively cooled, the 2Y a smooth can with 2 small fans. Eventhough i used 2 cells less, my runtime was slightly higher. I personally would go with the HV setup. But either way you will have more then enough power for your fantastic built.

lydiasdad · 03.18.2008, 08:37 PM

Quote:

Originally Posted by othello

Well maybe this could be interesting for you. This is a video showing my 10s1p A123 + jazz55 + Neu 1515/2Y setup compared to a 6s2p A123 + MGM 16018 + Neu 1515/1Y setup. Both truggys do wheigh around 11lbs. The truggy with 6s2p used a 1.4sek ramp up time. Nonetheless he could easely keep up with the very "brutal" ramp up time of the Jazz. The 6s2p setup is slightly faster due to higher rpms and gearing choice.

Temperature of both motors were about the same at the end of the run (60 degree C). The 1Y was finned and passively cooled, the 2Y a smooth can with 2 small fans. Eventhough i used 2 cells less, my runtime was slightly higher. I personally would go with the HV setup. But either way you will have more then enough power for your fantastic built.

Thanks othello. Both those setups look awesome. What kind of runtime do you get with hard running like that. What speed are you geared for?

tashpop · 02.24.2008, 12:28 PM

man, i just had a sick thought. check this out.
mrc thunder king rear end. basicly 1/8 st style setup with emaxx style twin motors.
2 1200kv kb45lx's @$120
2 turnigy 100a hv esc's @$200
2 dc9360 for 10s2p a123 @$200-250

use the steel gear upgrade for the trans and savage arms. i think that would kill any 5b ever modded or produced. who cares about the slow startup this esc has with this much power on hand.

lydiasdad · 02.24.2008, 01:57 PM

Quote:

Originally Posted by tashpop

man, i just had a sick thought. check this out.
mrc thunder king rear end. basicly 1/8 st style setup with emaxx style twin motors.
2 1200kv kb45lx's @$120
2 turnigy 100a hv esc's @$200
2 dc9360 for 10s2p a123 @$200-250

use the steel gear upgrade for the trans and savage arms. i think that would kill any 5b ever modded or produced. who cares about the slow startup this esc has with this much power on hand.

Just a little over kill don't you think?

It's all about power to weight ratio. a stock baja is ~21lbs. Mine will end up around 15lbs rtr. 10 a123 cells can put out a peak of around 2.5KW. I'm running 12. Othello has eagletree graphs that show the power output on 10s1p.

SpeedAssault · 03.17.2009, 12:51 PM

Quote:

Originally Posted by tashpop

man, i just had a sick thought. check this out.
mrc thunder king rear end. basicly 1/8 st style setup with emaxx style twin motors.
2 1200kv kb45lx's @$120
2 turnigy 100a hv esc's @$200
2 dc9360 for 10s2p a123 @$200-250
.

GOOd Lord

That's crazy fast

Do you have pics and info on these parts ?

I'm watching this one
I have a custom build that needs a lot of power

Revracer · 02.24.2008, 06:16 PM

very cool man. cant wait to see your final product. what are these kb45xls? ive never heard of them? are there different kv rated ones?

othello · 08:46 PM

Yep ... the Kontronik Jazz 55-10-32 ESC has proportional brake. Two car modes. One with reverse and the other is forward only. This is my latest truggy (11lbs) video from today: Neu 1515/2Y (1100KV), Jazz 55, 10s1p A123 with proline badland tires: up to 2KW on this run. With a little heatsink on top of the cooling plate it runs cool and my highest peaks reached 100-120A (max of my eagletree micropower v1).

Good luck with you project ... looks very promising.