Best to use a 1/5 scale Rx pack.

it says that hyperions is good for 10s or 40v but 10s is actually 42v so i am not so sure about that. the medusa bec is good 45v or 10s which makes more sense. its on backorder with allerc.com though. i will have to find it somewhere else.

so the bec has to be hooked up to the 10s pack? it doesnt just connect to the 2s rx pack and then the reciever?

lol If Hyperion says 10S, it's good for it. I did notice that it said 40 and not 42 volts, kinda strange but I'd ignore that.

For input it says 8-40 volts, so 2S is fine.

Lutach, I am a RX pack user, but only because I haven't bought the Hyperion BEC yet! :mdr:

The Rx pack is the safest bet specially when using those huge servos in the 5th scale.

ok, so my LHS has the Castle BEC Pro which is good for up to 12s. i am going to get it now. one question though, do i need a rx pack and the BEC or just one or the other?

Just one or the other.

I would use a 14.8 Volt 4000mah pack with a UBEC.. weights less than 5 NiMH and more wattage.. Plus you could run fans off of it as well(If you wanted to)..

whats a ubec? man, i am getting confused. i need to sit down and learn more about this stuff. i do have fans that i will need to run. i have always used y-harnesses in the past to run my fans. whats another way of powering fans with the ubec?

I thought this new big high torque servos were meant for 2S lipos.

BEC=UBEC battery eliminator circuit or universal battery eliminator circuit. Most fans are 12v, you've already configured your setup for 6v fans, which is fine. With a 4s pack you could power the fans directly from the lipo pack. (they can handle a little over voltage.)

Like those $200 JR hi-volt servos?

I'm sure they are well worth it, but most RXs still won't support over 6V to my knowledge- so that makes it a problem.

James, most any brushless fan will be fine up to about 75% over spec'd volts. And wow do they work. Buddy of mine has 2 2" BB fans rated 12V, run on 16.8 normally, and have been run at 25V, no issues. I have 2 1" Novak fans rated at 5V, running 8.4 for over 3 years. No worries!

I think the Spektrum Rxs can handle up to 9V

Now that you mention.. yeah I think it was 9.6 even, but what about the Futaba owner who tries to use one of the JR servos at 8.4.......

he buys spectrum rx's shortly after:lol:

so i went and picked up the castle bec pro good for up to 12s and 20 amps, which is very high amps for bec i am told. anyway, all my fans are 6v. i do have 12v fans too but currently my build makes use of 6v fans. my servos are the hpi sfl-30mg 1/5 size for steering and for brake i have available a futaba s9157 and a jr9100hvt. the jr is capable of using 7.4v input but the steering servo can only go up to 6v so i will probabaly use the fut s9157 as it is rated at 425oz at 6v and the jr is 403oz at 6v.

is it possible to run 7.4v to one servo and just 6v to the other?

The HV servos were born from the rock crawler crowd, and they generally power the servo directly off a 2s lipo pack and use a BEC to give 6v to the rest of the electronics.

So, if you run a 2s receiver pack you could power your HV servo and then use your new BEC to power everything else. (BEC paralleled to the HV servo off the 2s)

To directly power the HV servo just run the + and -of the receiver plug directly to thhe 2s pack. Run the third wire (the signal wire) in the receiver plug to the receiver like normal.

I'm still hanging in there. I got a new to me truck last week so I've been busy with that.

I got my battery mounting plates mounted last night. I need a tap to make holes in my new motor mount plate. I should have time this weekend since that wife and kids are going back home to visit her uncle.

hey all,
so i am going to be using the castle bec to power the esc and reciever. but i have a small 2s 1350mah lipo that i want to use strictly for my 6v fans. how would i hook this up? do i just connect the batter directly to the fans? or maybe connect to a switch harness and then the fans? or do i need some type of resistor or something like with led's?

You'll need a gyroscopic thermocouple, and a passive resistor.

:mdr:

Direct or switched is fine. When will we see this thing in action??

you don't need a seperate lipo pack. well, you can do if you want, they have 7,4 volts, which means good cooling with the 6v fans, no problem at all for sure.

or, you plug the cable for the fan into the receiver. there you get, depending on the ubec/bec, about 5 or 6 volts. if the bec is powerful enough for the big servo, don't worry about the fans. just don't plug the 6v fans onto 10s...:drunk:

thanks guys. and you will see this in action soon...very soon. i stopped by the machine shop today and they were working on my hubs. in fact, they are probably done now and i can go pick them up so i can get my brakes installed this weeked too. i am gonna get the esc and bec all hooked up right now and ready to go and then start working on the brakes tonight. my buddy has a killer hi-def camcorder and will shoot the vid. so if he is available this weekend we should see some action. i am crossing my fingers.:yipi:

SWEET!... luckily you have a buddy who works at the machine shop... It's going to be awesome seeing urs and Kazs' video....

yeah, i was thinking of starting a new thread. we'll call it the "Official thread for 1/5 Redcat Rampage Brushless Conversions" and all of us post some pics and vids of our final rides in there. and i am sure we will see more in the future. its such a great 1/5 to convert cuz its affordable. i am into mine about the same as it cost me to do a nice 1/8 buggy or truggy. what do you guys think?

have you got the esc to power up yet?

I'm feeling the peer pressure now... :lol:

I worked on mine last night though. I go the wires and bullet connectors to the ESC.

well my plan was to get the esc all hooked up tonight since i have the bec and everything now but since my machinist finished the parts for my hubs i decided to work on the disc brakes instead. here are some pics. tomorrow will be esc day and test run without brakes. i need to order a couple of parts to finish up the brake system. probably gonna be another week to get the brakes finished but i will try to get a video before then. there are a ton of small, time consuming, mods needed to make these disc brakes work.

to make the disc brakes work i had some small aluminum blocks made that attach to the hubs and then the calipers attach to them. a few pics.

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gitter dun!!

so did you ever get that controller working?

looks good
great built!:smile:

Brakes looks cool man.. Should be plenty of stopping power...

kaz, did you already get your brakes mounted? did you run into issues? its just one thing after another with these? i need to purchase some extended hexes cuz now the wheel hits the carbon disc before it even gets tightened down all the way. also the wheel hits the calipers so i need to grind out a little bit of material off the caliper or the wheels.

speaking of wheels i got my new outlaw 5t rims and hostile mxt tires today. they are sick!

as for the esc i am sure it works but i still havent got it all hooked up.

here are some pics of the new wheels/tires. and i think i am gonna stick with the rampage truck body instead of the desert rat 5t body. the ramp body is so much more aero-dynamic and i think will just be a bettery body. plus the desert rat body is kinda hideous. if the hpi 5t body wasnt so long i would use that. i like that body a lot.

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Yes. No, other than the binding I told you about.

I did discover that a 200 ounce servo pushing cable brakes seems a lot weaker than a 200 ounce servo running the stock Rampage brakes.

Wheels and tires look good.

I worked on soldering my battery connectors some tonight. I discovered that slip on pencil erasers make a perfect cover for 6mm bullet connectors.

hmm. yeah when i mounted my brakes on the stock plastic parts they worked fine, with the exception of needing to take out a little material to allow full steering throw. the aluminum parts are different in size and shape slightly so its been a little tougher. actually after looking at things again some extended hubs will take care of everything. they need to be extended by about 5mm on each hub though. i dont know if there are any that extend out that far. again i am using 24mm hubs. you know of any? i really like these uberRC hubs. i cant use the darksouls cuz they are round where the discs would be. so i need a hub that is hex shaped throughout.

http://www.davesmotors.com/s.nl/c.88...t.A/id.6349/.f

these uberRC hexes extend by 8mm which is perfect but they only sell them in a set so i would have to drop $200 and then try to sell the fronts. d4mn. didnt really feel like doing that.


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Looking good man.... Once your done, your Rampage will be worth a fortune.. LOL

I'm using Dark Soul extended Baja rears and it works fine.

really? where does the carbon disc sit on the hub? i swear when i tried the disc was on the round part of the hub and therefore wouldnt work. anyway, i already ordered those uberrc hubs. i found a place that sold them in pairs so i was able to just buy 2 sets of rears.

Dude, that looks dead sexy. I'm not sure about the yellow lid though- I think metallic gray would look great.

go to your cnc shop and ask them to build them. thats done in a few minutes, probably cheaper then buying some. get a 24mm aluminium hex bar and get it drilled.

dammn, I can't wait to see that baby runnin'!

that is crazy, lol. i just picked up some gun metal gray and some lame flake paint at the LHS a couple of days ago. its gonna look sick and match the gun metal wheels but have a nice metallic flake hue to it. i just need to sell these bodies first and then buy the new one.

i had thought of doing that but i found some uberrc's on ebay and got them for a decent price and was able to buy 2 rear pairs as needed for this truck instead of having to buy 2 complete sets.