BL Revo using Revo Transmission?

[BrianG]

There are a number of things that contributed to the weight loss:

- I used 1/16" 6061 T6 Al in V2 as opposed to 1/8" thick "crap" Al you find at Lowe's/Menards (don't know the grade) in V1. Plus, I used more metal in V1. In hindsight, I could have drilled large holes in some places to reduce weight in V1.

- The Emaxx tranny is quite a bit heavier than the Revo one. In the emaxx, the input gears and idler gear are metal. All the Revo gears are plastic, but they are wide so they are still tough. There are more bearings in the emaxx tranny too. I removed first gear and the OWB altogether in V2. Again in hindsight, I could've lightened up the Emaxx tranny by removing the input gear for first gear. The input shaft on the Revo tranny is smaller and therefore lighter. I also think the slipper assy in the Revo is lighter than the strobe, but not sure.

- The center drive shafts and cups in V1 were steel as opposed to the stock sliders in V2.

- I used heavier tires in V1 for better wear life.

[BrianG]

Well, I've had some time to play around with this version and I must say I am VERY happy with the results. Even with a 10XL on 14 cells, top speed is plenty for me. I don't know how fast it is but the tires balloon about 1/2" at a guess.

I also didn't expect as much torque geared as high as I am. It will wheelie on command. At first I thought it was because there was a substantial amount of weight in the back, but it wheelies in reverse too. I even set the battery to "NiMH normal" and the throttle curve to the lowest setting. I had to set the brake to soft and the reverse EPA to 70% to keep from flipping when braking.

Runtime is right around 20 minutes give or take and that is running around at a local park in shortish grass.

Motor temps are right around 130F, but the ESC only gets to around 115F. Batts are cooler at around 100F. Outside temps have been hovering in the mid 90's with ~70% humidity (yuk). Looks like the added heatsink on the Quark works wonders, and no fan!

The locked tranny is holding up great (my epoxy filled second gear/clutch assembly). The slipper is set pretty tight too.

Yup, this one is definitely a keeper. It looks good (IMO) and runs good. Now I just have to get over to a track - the only one I know of is at my LHS and it's pretty small. I just don't want everyone there to laugh when they see how badly I drive! :dft001:

Someday, I'll get some Lipos or something.

[BrianG]

BTW: I weighed the Revo today:

Without the 14 cell GP3300 pack: 10.58lbs
With the cells: 8.47lbs

Not too bad.

[coolhandcountry]

Originally Posted by BrianG

BTW: I weighed the Revo today:

Without the 14 cell GP3300 pack: 10.58lbs
With the cells: 8.47lbs

Not too bad.

Do you have the with and with out batteries weight backwards?
I would keep them cells if not. They remove weight more than add.
What about the evo packs? The have a good discharge rating.

[BrianG]

Originally Posted by coolhandcountry

Do you have the with and with out batteries weight backwards?
I would keep them cells if not. They remove weight more than add.
What about the evo packs? The have a good discharge rating.

Actually no, the batteries I'm using are filled with helium and do reduce the weight. ;)

And now Squee's response post makes sense. I didn't catch that before. Doh!

Seriously: Yeah, the weights are reversed. Are these the EVO cells you are talking about? The GP3300 cells I'm currently using work perfectly fine if a bit heavy.

Originally Posted by BrianG

Actually no, the batteries I'm using are filled with helium and do reduce the weight. ;)

And now Squee's response post makes sense. I didn't catch that before. Doh!

Seriously: Yeah, the weights are reversed. Are these the EVO cells you are talking about? The GP3300 cells I'm currently using work perfectly fine if a bit heavy.

i think squee is talking about these http://www.flightpower.co.uk/

[BrianG]

Oh.

The only large single 5s pack that would fit length-wise is the 2500 pack, which is too low in capacity. Paralleling them would be too wide.

When I made the V2 Revo, I figured I would be able to find a decent battery solution to I was wrong. Oh well.

To summarize what I'm looking for:
- Weight = 500g-600g.
- Capacity = 4-6Ah.
- Continuous discharge of >= 80A.
- Fits into an area 6.25" long (160mm), by 2" wide (50.8mm) by 2" high (50.8mm). I remeasured the length just to be sure.