MetalMan's brushless Revo is at it again...

[MetalMan]

With some backflips this time :).

I have two versions, one with music, and one without music. To me, the one with music is more enjoyable.

Music:


Non-music:

[BrianG]

The music was fine, and even if it wasn't, it's not like the volume can't be turned down. Although, I couldn't find the mute button for the cameraman. ;) :)

[zeropointbug]

Hey! Nice video, BTW, how does the 5s2p A123 pack perform with the 7XL? I'll be using 5s2p A123, 7XL, and Quark. Do you have an eagletree graph of a typical run?

Zero

[MetalMan]

Yeah, the music does help drown him out a bit. However, he is better than no cameraman :).

Originally Posted by zeropointbug

Hey! Nice video, BTW, how does the 5s2p A123 pack perform with the 7XL? I'll be using 5s2p A123, 7XL, and Quark. Do you have an eagletree graph of a typical run?

Zero

I've been running the same power setup for quite some time now. It runs great! I do have a graph of a typical run, but it's on another computer. One data point I can remember is 120amps 12.5v, which is 2.5v/cell @ 60amps/cell.

[zeropointbug]

120 amps huh, quite a spike! 12.5 volts is actually pretty decent.

I want to get some Altair Nano "nanosafe" Lithium Ti cells. They claim 100C capability! Useless i know, but you would think if they have that capability, they should perform very well at the lower rates we drain at... they aren't generally available yet, is the prob. :030: When, i don't know.

How does it compare with a 4s 4000mah LiPo pack? The average say...

[Serum]

Where are your tires boy!!!?

Nice vids MM. As for the 120A spikes, I believe that the spikes might even be higher. I don't have an eagletree, but was looking into getting one, until I realized that the max amps that it can handle/record is 100. From the posts I've read, I'll assume that it will actually do 120, but probably not an accurate max current reading if the spikes are over 120. If this is incorrect, please let me know. I'd like to get an eagletree, but if 120A is as high as it can go, I'll wait until I can afford a model that can go higher.

[zeropointbug]

It's 100Amps continuous i believe. I think it should read as high as current as you can put through it until it blows up. It's just a heat issue i think, if you could mount it to a heatsink, the power throughput would most likely go up. It's mearly monitoring the power going through, there is no FET switching involved, so very little heat generated.

[jhautz]

Nice!! Whoa Ho! :020:

[Dafni]

Nice Travis. Next time go for some front flips too!
And for heavens sake, get that truck a body!! :)

Daf

[luvsrc]

AWSOME video Metal Man,Is 5s 123 cells same voltage as 5s Lipo, I'm thinking of buying the 540C 7XL for my maxamps 4s lipo and my quark 125 pro,What top speed can it reach without thermalling using it on a race track?
Are they the same power with my Hacker XL motors?

[jnev]

Very cool video. I liked watching the one with no music. I love the sound f the car. It looked like you were hittign some decent speeds as well.

[Serum]

nice thing about lipo's you can have more runtime (capacity) at the same weight.

[MetalMan]

Thanks for the comments, guys!

Serum - I decided to try something a little different with the tires. Both wheels are 17mm hexes :005:.

AAngel - I have yet to see a spike over 120amps. Sometimes the voltage will be at a lower point, like 11.5v (down from 12.5v) at a 120amp spike, even when the battery still has a lot left in it. So, it appears it isn't capable of going over 120amps.

Dafni - It was fine without the body :). Besides, both of my bodies for it have large cracks in them :(.

luvsrc - 5s A123 is 16.5v, 5s Lipo is 18.5v. There's a bit of a difference, but 16.5v is fine with me. I have yet to see my 540C 7XL get above about 150 deg. F, in the street or on the track. I do punish it pretty hard on the street (as you can somewhat see). With the Maxx mashers the 7XL got to about 140, and with the 1/8 buggy Road Rages it got to about 125. The Feigao 540C 7XL is pretty much the same power as the Hacker 7XL, but the Hacker 7XL should be slightly more efficient (I don't think it's enough to justify the almost doubled price).

elegal - The gearing was the same for the MT tires and for the buggy tires. I was surprised that it was going so fast even with the smaller tires.

Originally Posted by Serum

nice thing about lipo's you can have more runtime (capacity) at the same weight.

Yeah, that's one reason why I'm going Lipo in my Hyper 8.

The A123s do have one major advantage, though. They aren't sensitive to overvoltage like Lipos are. Because of this, I haven't felt the need to balance either of my 5s2p A123 packs in a while. I've gone through about 5 cycles each since I last balanced them.

[Serum]

I like the GRP 17mm wheels.. they come glued with moulded foams inside. They look an awfull lot like the wheels used on the 8ight 8t..