My BL Revo project

[BrianG]

Originally posted by squeeforever
why is the tranny case empty?

-corey

It's lighter that way. :)

Seriously, I got the halves and motor mount just so I can figure out how to adjust the chassis so it will fit and where the battery trays would go - a template of sorts. I plan on getting the gears later, which is good since I know now what I don't/do need (for the most part).

[Dafni]

Originally posted by BrianG

I should've asked this last time, but do you happen to know how much each weighs (approximately)?

I assume you are speaking of the motors. L is 278g and XL is 370g.

[Serum]

Don't look yourself blind on that weight. a cool running setup is worth something too.. ;)

[BrianG]

Thanks Dafni. Yeah, that's what I meant; the motor weight.
I see you have 7 GP3300 cells in each pack on your version. That must come really close to taking up all the room from the rear a-arms to the servo mounts in the front! I am now planning to make another set of battery trays that are a bit longer to hold 7 cells each, but it will be really tight if I make some type of end tabs to hold the batteries from sliding forwards or backwards!

Serum, I am not overly concerned about the weight itself, more about the balance of weight overall. I found my Nitro Revo to be a bit heavy in the rear left side where the motor is. I've broken two shocks because the truck tends to land on that corner. I'm trying to make it as perfectly balanced as I can.

Is there any advantage of side-by-side cell arrangment vs "tube packs"? The only one I can think of is the ability to use beefier battery bars...

[Dafni]

The side/side vs stick thing has just been discussed. Like yesterday or so. Do a search. (sorry, but I'm to lazy right now)

You're right, 7 cells just fit inbetween the arms and servo.

[squeeforever]

Originally posted by Dafni
(sorry, but I'm to lazy right now)

lmao!

well basically it comes down to resistance. the side-by-side soldered right will have a lot lower resistance.

-corey

[BrianG]

Thanks. I had already taken Dafni's gentle rebuke and read the thread he was talking about. :o

[Dafni]

sorry for the slacky-ness, it was late at night :o

[nbcaznmaster]

come on dafni! were here to help! and sometimes we must sacrifice a few hours of sleep, maybe school, and maybe food too!

[BrianG]

I've been trying to figure out how to design a sturdy rollcage to protect the BL motor, tranny, and ESC and came up with this prototype:



It is just sitting on the battery tray mounts right now, but I plan to secure it to the back of the battery trays eventually. However, I don't want to use aluminum because a good hit will bend it (especially since the top is flat). Anyone have any ideas on what type of material to use?

I want something that is light and will be able to take an impact from landing on the lid (without bending) since I'm not a great driver. :)

I was thinking of bringing the design to a metal shop and having it made from spring steel, just not as thick or as wide. I want to make sure the design will work as intended first, so, I'm open to suggestions on how to make it better.

[squeeforever]

i would stick with aluminum but you might also want to consider really think carbon fiber.

-corey

[Dafni]

Hi Brian. Looks functional! Good work.
I like it aluminium, would also keep it this way. Maybe add some foam to protect your paint-job.
Just bend it back when it gets bent. A wing also helps to protect the inards of your truck.

[nbcaznmaster]

ithe rollbar looks kinda ugly, but my e-revo aint a beuty queen either. It'll definatly protect it. U wont be able to use any of them roudn proline bodies.

[BrianG]

Thanks for the comments!

I made the rollbar out of aluminum simply because it is easy to work with (actually, bending it was not easy), but I'm afraid if the truck lands on the lid, the top of the bar will bend and crunch into the motor. That's why I was looking for something a little sturdier.

I've never worked with carbon fiber. Although I do know it is strong, I've heard it snaps fairly easily. Besides, I have no clue where to get raw pieces or how to work with it. Any links to give me a clue?

Yeah, you're right; it is ugly. At least it's symmetrical though (at least as good as I could get it). It does fit under a stock Revo body with room to spare, so it should fit under pretty much any body as long as the body posts are set right.

[rchippie]

Brian that looks like a very good rollbar. I had a similar idea when i made my EVO in DAFNI style. That AL is more than strong enough. If you polish the Aluminum, it will look very good. The CF would'nt be a good idea in my opinion because you cant bend it so you would have to brackets or something, & it would'nt look clean. I dont think it would look as good as the one you already have.