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New to RC's - over whelmed !!

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New to RC's - over whelmed !!

Old 12-27-2012, 12:14 PM
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Dirty30drifter
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Default New to RC's - over whelmed !!

Hello!
I saw a beginners sub forum, but it was in airplanes...... : / I'm not flying.... I'm into being sideways
I just got a RS4 pro 3 chassis given to me for Christmas (slightly used)
i wish to start building this thing ASAP. I've been trying to read up on kv's, turns, lipo's, esc's and I see its mostly a matching game. Which would be fine, if I had more experience in this. I seem to be over whelming my self.
not looking to do anything fancy, just ready to enjoy a new hobby. If I end up loving it, I will become infatuated with it, and eventually learn a lot. For right now however, I'm looking for enjoyment.
heres a photo of my rig...
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You can see a few upgraded parts were put on this car and or included with.... Like the 1way locker? (I think that's what kind of diff it is)
He also said something about a 1way lay shaft? Or something? Idk...
Building a real drift car is easier to me wiring up a Haltech ecu and programming and tuning a motor is easier to me as well. With that said though, with in time.... I'll more than likely be a total nut about this hobby.
I need a motor, esc to match, a battery to match them- a servo, and a receiver? A transmitter as well, and a charger unit for the battery.
I keep trying to match up a motor and esc and battery and find my self spending more time looking back over sites that explain the values and specs and by the time I get back to products, I have already blended and confused my values / readings .... Fail...
I'm looking to start off simple and cheap, so that I can get a feel and understanding of how my car handles before I get into particular parts and etc.
If anyone would happen to have all that I need I would appreciate that as well.
It's hard to read up on all of this, when you have no Internet and are limited to 3G on a little cell phone screen
I would really appreciate if someone can help get me setup to start a new addiction
Thanks guys!!
Old 12-27-2012, 12:22 PM
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Dirty30drifter
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Default RE: New to RC's - over whelmed !!

Dunno if this will help with the motor selection.....   But I have a 27 and 29 motor gear.  I have NO drive gear to mate to the motor gear.
Old 12-28-2012, 10:14 AM
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Default RE: New to RC's - over whelmed !!

Bump!

Come on guys......
Old 12-28-2012, 11:19 AM
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steamplugadam
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Default RE: New to RC's - over whelmed !!

Hows it going, ive only been drifting for about a year not, using my rc18r, and my associated TC5. 
But been into rc's for 15+ years, Nitro and Electric, and Electrics rc have came aloong way since back in the day.

As for the parts you need, Its a personal prefrence really,

Brushless Motor generally use about 3000kv to 4000kv  13.5t - 8.5t  for drifting.  Some people like higher kv and just keep esc turned down, punch, timing, ect..  Also Get a Sensored Motor, Way way, Smoother.

For Esc, Wont need anything over 60a  Get a sensored/sensorless ESC so have option of running sensored or sensorless motor.

For servo, Anything over 100oz of tourqe, and .13s or less for transit time, Metal Gears are a plus.

Lipo battery,  depending on what you want for run times, 2s 4000mah 30c   -   2s 5000mah 20-30c 

Just about any Radio and receiver will work, but a 2.4ghz would be ideal,

Go to hobbypartz.com  they have everything you need there and at good prices,
Have a radio w/ receiver 2.4ghz lcd screen $39.99 New, ive been using for over 5 years now, and sold all my spektrum radios.

My TC5:
60a sensored/sensorless hobbywing xerun ESC
Turnigy Trackstar 8.5t motor
Flysky gt3-b radio & receiver
spektrum low-profile s6070 servo
Turnigy nano tech 2s 5800mah 30c
Runs great,super smooth, drifts great for all pulleys being 50/50 with no countersteer, until i figure out some pulleys to fit. : ) 

Hope helps.
Old 12-28-2012, 11:36 AM
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Dirty30drifter
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Default RE: New to RC's - over whelmed !!

yes thank you.   This gives me a great platform to base what I am looking for, off of.

I noticed that I don't have a spur gear for my rig.    I'm sure matching gearing of the motor and the spur are important-     Any insight to this? 

Thank again man!!
Old 12-28-2012, 11:56 AM
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steamplugadam
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Default RE: New to RC's - over whelmed !!

That i am unsure of, i am not to familar with HPI's. im using a 15t 48p pinion and a 87t 48p spur gear. my tc5 has a internal gear ratio of 2.0. not sure of what your hpi is tho.  what pulleys are being used??  front & center, rear and center. can help out if get that info.  
Old 12-28-2012, 12:12 PM
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Dirty30drifter
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Default RE: New to RC's - over whelmed !!

http://archive.hpiracing.com/graphics/instr/p3/pro3_25.jpgAC

I found that ^     dunno if that's of any help.....

I have a 27T and a 29T Motor gear that was in one of my parts bags....   

IF you want me too, I can count the number of teeth on my diff's and the receiving  pulleys that they go too...


Im sorry that I am of not much help...    I hate not knowing what I am talking about...    My apologies.
Old 12-28-2012, 12:21 PM
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Default RE: New to RC's - over whelmed !!

No problem all in part of learning : )

yes that would be great help if can count how many teeth are on front diff pulley, and the center pulley that goes to the front.(left side car)
(if looking from rear of car)
 
and same count the rear diff pulley  and the center pulley that goes to rear.  (right side) (if looking from rear of car)


Unless you know they are stock pulleys?  

what was car previously used for? ( drifting , touring, carpet,  ect... )

Old 12-28-2012, 12:28 PM
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Dirty30drifter
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Default RE: New to RC's - over whelmed !!

 thanks man....  I hate feeling like a PITA



I am unsure what he used it for....  He works and runs a Porsche race mechanic shop  Mode Inc.......  so probably racing..   He's a hard cat to get a hold of too...   I've tried   

The diff's looked factory to me....   You can tighten or loosen the screw on the pulley side to adjust for slip.

However, I did install the front 1 way diff, and I know he mentioned something about a 1 way lay shaft?  :?  which to me, from rotating the assembly I would assume thats the shaft that the spur gear mounts too....   it has a one way action to it.  (reverse mod wouldn't turn the front wheels) 

I brought the chassis here to a buddies, so give me about 20 minutes, and i'll have those numbers for you.re">


I can't thank you enough for working with me through this       re">
Old 12-28-2012, 12:31 PM
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steamplugadam
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Default RE: New to RC's - over whelmed !!

figured i add when getting a motor try make sure its a 540 size can,  not a 380. and  not 380 rotor inside 540 can either. as might have problems over heating. if that makes sence.   
Old 12-28-2012, 12:52 PM
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Dirty30drifter
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Default RE: New to RC's - over whelmed !!

not sure of the 380?  I've never seen that number before...  but I am new-  i saw 540 somewhere once, and that numbers stuck with me.  (probably because I used to race a 450r quad)

anyways....   the 1way lay shaft  has both 16T gears (spur side and left side)   I counted the front diff I removed in exchanged for the 1 way locker and it was 36.  Its factory looking, and looks identical to the rear.

so 36T and 16T on my pulley's and a 27 and 29T for a motor (im guessing) (dunno what else these lil things could go too... lol)re">
Old 12-28-2012, 12:58 PM
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Default RE: New to RC's - over whelmed !!

ok sounds stock  with  50/50 equal pulleys front and rear.  for the 27t and 29t motor gears (pinion gears) do have a little set screw on them?
 let me figure some #'s for your gear ratio. to better what  pinion & spur  to use.
Old 12-28-2012, 01:03 PM
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Dirty30drifter
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Default RE: New to RC's - over whelmed !!

yes sir they do (missing the screws, but the bag is FULL of screws... probably the least of my worries)
I was stoked that I got the car....
Now Im even more stoked there is actually some progress (help) going on re">
Old 12-28-2012, 01:16 PM
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Default RE: New to RC's - over whelmed !!

ok so your internal gear ratio is 2.25:1   so you are going to want a final drive ratio about 10.5 -11.5 as drifting isnt super fast and need more of tourqe than a top speed.  so pinion 17t 48p & spur 87t 48p.  again is a prefrence thing too, shocks, shock weight, balance of car , tires,  camber, toe, all will play a factor to how it will drift, so tweaking and playing around with it is the ultamite way to know  when  and how to change things .  hope this gets you up and running and cant wait to see the progress.     Check this out.
Old 12-28-2012, 01:18 PM
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steamplugadam
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Default RE: New to RC's - over whelmed !!

this chart  is for 48p gears, only use 64p if plan on running on smooth prepared surfaces with no small rocks dirt or anything.

Transmission Ratio 2.25:1

S P U R S I Z E
8283848586878889909192
1018.45 18.68 18.90 19.13 19.35 19.58 19.80 20.03 20.25 20.47 20.70
1116.77 16.98 17.18 17.39 17.59 17.80 18.00 18.20 18.41 18.61 18.82
P1215.38 15.56 15.75 15.94 16.13 16.31 16.50 16.69 16.88 17.06 17.25
I1314.19 14.37 14.54 14.71 14.88 15.06 15.23 15.40 15.58 15.75 15.92
N1413.18 13.34 13.50 13.66 13.82 13.98 14.14 14.30 14.46 14.63 14.79
I1512.30 12.45 12.60 12.75 12.90 13.05 13.20 13.35 13.50 13.65 13.80
O1611.53 11.67 11.81 11.95 12.09 12.23 12.38 12.52 12.66 12.80 12.94
N1710.85 10.99 11.12 11.25 11.38 11.51 11.65 11.78 11.91 12.04 12.18
1810.25 10.38 10.50 10.63 10.75 10.88 11.00 11.13 11.25 11.38 11.50
S199.71 9.83 9.95 10.07 10.18 10.30 10.42 10.54 10.66 10.78 10.89
I209.23 9.34 9.45 9.56 9.67 9.79 9.90 10.01 10.13 10.24 10.35
Z218.79 8.89 9.00 9.11 9.21 9.32 9.43 9.54 9.64 9.75 9.86
E228.39 8.49 8.59 8.69 8.80 8.90 9.00 9.10 9.20 9.31 9.41
238.02 8.12 8.22 8.32 8.41 8.51 8.61 8.71 8.80 8.90 9.00
247.69 7.78 7.88 7.97 8.06 8.16 8.25 8.34 8.44 8.53 8.63
257.38 7.47 7.56 7.65 7.74 7.83 7.92 8.01 8.10 8.19 8.28
Old 12-28-2012, 01:35 PM
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Dirty30drifter
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Default RE: New to RC's - over whelmed !!

awesome.   Good to know the drive ratios and what I need now.

Only thing I am confused about is the (p) 48(p) , 64 (p)     I'm guessing pitch?  because its obviously not pinion

and if pitch, how does that effect things?   You said to use a 64 but, the chart is only for a 48.   maybe I am over looking something...     and if he was using a 27 and 29....  sounds like racing ?


If its not to hard to explain...  how do the drive ratios go together?   I know only a little basics on gears and drives.   15T sproket and a 40T sprocket is 40/15 for 2,66   but I never figured my transmission final ratio into that.  I just knew a 15/40 =2.66 where as the 15/35 was a 2.33 and gave me longer gears.  or how I swapped the 3.73 out of my car for a 3.25 to get the gears more usable...

So how does this convert over into RC world with the internal of 2.25:1  and needing the final drive of 10.5-11.5.

More than likely I will change things out...   My shop would be the only Smooth surface that I will be running it on, maybe a tennis court.   It'll be parking lots the rest of the time.   I cant say which I would do more of....    I know that I will want a bigger area like a parking lot eventually, im sure lol

I realize a lot is suspension tuning.  the adjustments on this car are pretty insane...  haha     I can figure that out once I see how it handles though.   Looking to get her up and running and experimentatingre">    
Old 12-28-2012, 02:18 PM
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Default RE: New to RC's - over whelmed !!



yes th p is for pitch, i would only use 64p as its teeth are smaller and more prone to small rock and debries getting jamed in them, i use 48p becauseim mostly in the parking lot or somewhere unprepared, yes would use the hight teeth pinions toget more top speed, ifthrow some rubberson, carpet racing, no need in having that kindof wheel spin if cant useit.

posting by fellow RCU member to clarify things(alot of typing lol)- >

Old 12-28-2012, 02:20 PM
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Default RE: New to RC's - over whelmed !!

Gear Ratio:
To calculate the car’s gear ratio, you need to be familiar with the type of drivetrain it has. 2WD RC vehicles typically have a single one-speed transmission. 4WD vehicles also usually have a one-speed transmission, and are gear and propeller shaft driven or belt and pulley driven. Multiple speed transmissions can also be calculated for gear ratios, if attention is paid to the things mentioned below.
If the vehicle’s manual didn’t provide a gearing table in its contents, then you’ll have to take apart the transmission to count the number of teeth on each gear and write it down
.
Here are the names of the gear you will need to count:
1. Diff Gear (diff pulley for belt drives)
2. Counter Gear (center pulley for belt drives)

The counter gear/ center pulley counts as any component that runs on the same shaft or axis as the spur gear. Note that some shaft driven cars won’t have a counter gear close to the spur; they would be the gears that mesh directly with the diff gears
.
Now that the number of teeth on the gears or pulleys have been counted and written down, we can plug the numbers into an easy formula to get the gear ratio of the car’s transmission.

Gear Ratio Calculation:
X = diff gear/ pulley
Y = counter gear/ center pulley
Z = Gear Ratio
X / Y = Z
Gear ratios are typically expressed in Z:1 (2.055:1 for example).
For example, one of my cars has a 36T diff pulley and a 16T center pulley. I should get a gear ratio of 2.25:1
36 / 16 = 2.25
For the sake of simplicity, we’ll use Z above to get the car’s Final Drive Ratio. It’s another simple formula, using the difference between the spur and pinion gear, and getting a product from Z, the car’s gear ratio. Again, count and write down the number of teeth for both the spur and pinion if you don’t know what they are.

Final Drive Ratio:
Spur gear = A
Pinion gear = B
Power output ratio = C
A / B = C
Finally, multiply the power output ratio by Z above, the gear ratio:
C * Z = FDR
The FDR (final drive ratio) is also typically expressed as a :1, or to one ratio (4.75:1 for example).

Rollout:
To calculate the rollout of the car’s gearing, you will need to measure the tire’s diameter in standard inches. Once that’s written down, calculate the circumference of the tire by multiplying it by Pi (3.14). One example would be a tire with a 2.44 inch dia. would have a cir. of 2.44 inches.
Divide the circumference of the tire into the car’s gear ratio, and you will get the potential rollout of the car.
Tire circumference = A
Gear ratio = B
Rollout = C
A / B = C
For example, using the numbers we already have:
2.44 / 2.25 = 1.08

To convert mm to inches, divide the mm by 25.4 (for example, 62mm = 2.44 inches, or 62 / 25.4 = 2.44).
Old 12-28-2012, 02:33 PM
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Default RE: New to RC's - over whelmed !!

that's exactly what I needed to see.    Thank you, and whomever else it was that helped as well.

I skimmed it as of right now (busy with ls1 swap), but i know that's exactly all I will need to know to play around with gear changes.    Thank you so much!!!   


So, i need to look for a 540 motor,  8.5-13T  / 3-4Kv &  sensored is better.  ( is that like a temp sensor?)  :? haha
at least a 60A esc. sensor and non ?  (like a either or thing? or BOTH capable)   
servo 100oz and a quick transit time.

I still feel un easy about the batteries since they are high dollar...    but that put aside, how universal are the plugs?  Do I need to order plugs?  I read something about dean vs tamiya crap connectors?   

Thanks again so much !!!re">

Old 12-28-2012, 02:52 PM
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Default RE: New to RC's - over whelmed !!

its was posted by dragnse7en.

yes for most esc can come sensored, non-sensored. or both. The sensor has a plug that connects to the esc to tell it what position the motors rotoris in at all times, very smooth, as you may get jumpy starts with non-sensored at verylowrpmrange.

definently dont use tamiya plugs with lipo's, most likley melt them lol. I use deans and xt60 connectors as there able to handle the high current and amp draw. used deans for over 10 years with no problems at all and i like them best.

i actually have a new brushless motor, 120a esc, lipo battery , program card for sale on ebay,
Used 2 times in basement,it was a little to heavy for my tc5 for me to balance it left to right, but mabey you wouldnt have that problem seeing how the motor is in the center vs on side. its on auction only at$100 +$15 for shipping so far.

http://www.ebay.com/itm/Xerun-120a-E...item19d7c0c66d

as for lipos go to either hobbypartz.com or hobbyparts.com 2 diffrent sites one is in usa, other is international and in usa. both good sites and great batterys, i got my nano tech 5800mahat second site forabout $40 shipped.

Old 12-28-2012, 02:58 PM
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Dirty30drifter
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Default RE: New to RC's - over whelmed !!

damn that looks nice!!!  I'm watching it now  I'd love to win it, its already got two bids on it, so we shall see....

I really appreciate all the help.   This should be enough for me to get started.   I'll post back here if and when I get some progress made or win your setup  (fingers crossed)

Thanks man!!!re">
Old 12-28-2012, 03:00 PM
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Default RE: New to RC's - over whelmed !!

No problem, good luck!

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