RedCat Sumo RSMC Q&A/ Build Thread
 

Here is my RedCat Sumo RSMC build thread.

Plans for this thread are to make it the definitive RSMC Q&A/ mild build thread.

I got into RC crawlers when a friend traded my an AX10 for my old Cherokee bumper I couldn't get rid off. I figured it was more liquid than a huge bumper in my shed... ya I never sold it... just played around with it on trails when it got slow or at lunch, I always wanted something smaller so I can goof around with it at the campfire.

My wife bought me a Redcat sumo for Christmas.

Anyways here is the "real rig".

http://i170.photobucket.com/albums/u...581027_n-1.jpg

Here is the Red Cat Sumo Crawler after I pulled all the goofy stickers off it
http://i170.photobucket.com/albums/u...DSC_1009-1.jpg

http://i170.photobucket.com/albums/u...DSC_1007-1.jpg

Re: RedCat Sumo RSMC Q&A/ Build Thread
 

Here are some stock shots
(for those of you who haven't seen these things)
http://i170.photobucket.com/albums/u...j/DSC_1006.jpg
http://i170.photobucket.com/albums/u...j/DSC_1004.jpg
http://i170.photobucket.com/albums/u...j/DSC_1002.jpg
http://i170.photobucket.com/albums/u...j/DSC_1001.jpg
http://i170.photobucket.com/albums/u...j/DSC_0999.jpg

Re: RedCat Sumo RSMC Q&A/ Build Thread
 

So what's the build plan? Battery conversion? Bigger tires? What?

Re: RedCat Sumo RSMC Q&A/ Build Thread
 

Here's a quick Youtube video I made to show the steering modes
<iframe width="560" height="315" src="http://www.youtube.com/embed/g6XSgm02-3A" frameborder="0" allowfullscreen></iframe>
(hopefully the embed works)
if not: maybe the mods can fix it.
Red Cat Sumo Crawler 1:24 (HD) - YouTube

Re: RedCat Sumo RSMC Q&A/ Build Thread
 

First thing I noticed is the springs are way too stiff.... maybe it's different with this little stuff, but un-captured springs lead to unbalanced rigs in full size so I pulled the coils off and measured the length of the shock and cut the coils to that length (2 loops for now).

http://i170.photobucket.com/albums/u...DSC_1011-1.jpg

Here is the difference in ride height (cut on the PS side)
http://i170.photobucket.com/albums/u...j/DSC_1014.jpg

Uncut vs cut flex is much improved
(here's total flex)
http://i170.photobucket.com/albums/u...j/DSC_1015.jpg

Here's the point where it lifts a tire
http://i170.photobucket.com/albums/u...j/DSC_1016.jpg

Seems pretty balanced now. But I did order the RedCat Softer coils to see if that helps also. (cutting coils should theoretically raise the spring rate). I'll play with that when the new ones come in.

Re: RedCat Sumo RSMC Q&A/ Build Thread
 

I'm pretty new to RC stuff so..

Exactly. "thumbsup"

I saw this thread:
Redcat Sumo micro crawler (RSMC) parts breakdown and losi compatibility
and this one:
http://www.rccrawler.com/forum/micro...sumo-help.html

but I'm not exactly clear:

I have a Micro Brain charger and an Onyx 200 charger, so I'm not really wanting to go LiPo unless there is a way to use my current charger.

Can someone point me to what battery and where to buy it?
What voltage do I need? (I'm guessing 6v since 4 x 1.5v "AAA" batteries equals 6v. )

Can I run it on more voltage and how many cells?

What mAh do I want to buy?

Re: RedCat Sumo RSMC Q&A/ Build Thread
 

One of the obvious weaknesses on the RCSC is that the steering linkage sticks out so far it gets hung up easily.

I guess you could mod it like this thread shows:
http://www.rccrawler.com/forum/losi-...dcat-sumo.html

but I think larger tires are a must also.

What tires should I get?

Re: RedCat Sumo RSMC Q&A/ Build Thread
 

I flipped my tie rods (with aftermarket servos) and the clearance issues went poof. Check out the sticky thread "post your battery finds here". I run 7.4 no problems.

Re: RedCat Sumo RSMC Q&A/ Build Thread
 

So 7.4v how many cells if I use a nimh and how many cells?

Re: RedCat Sumo RSMC Q&A/ Build Thread
 

Going to hijack your thread for a post :twisted: but I've been looking into the sumo axles but can't seem to find just them. Anyone know where to? Or is buying the whole thing best? Plan on making a foff for my little girl she wants a fast truck like mine so figured id build one and surprise her

Re: RedCat Sumo RSMC Q&A/ Build Thread
 

may aswell buy a complete. i just bought one off ebay a few days ago for $90 shipped

Re: RedCat Sumo RSMC Q&A/ Build Thread
 

theres a 2 individual axles on ebay right now for 25 bucks each

but i was wondering how many part match w the trekker? as in ball cups, tranny/axle in/output, driveshafts, etc. im researching how to swap out losi worm axles for these to give my scaler some speed

edit oops nevemind found other thread w info

Re: RedCat Sumo RSMC Q&A/ Build Thread
 

Pics and specs on the servos please? I just got my Sumo the other day but haven't had time to really look at it or run it at all.

Re: RedCat Sumo RSMC Q&A/ Build Thread
 

if you relocate the shocks down to the lowest hole it will improve flex and clearance a little