FOFF A-Ma-Jiggly

[redrustbucket]

Made it on video this time.

http://www.youtube.com/watch?v=YmsgTXXcvbU



2nd edit with a closer look.

[mar618]

awesome rig and a great video

[Robotboy]

Yo that rig is doin' work man
Nice vids as well!

So what electrics did ya settle on? Motor, batts and gearing?

[redrustbucket]

Originally Posted by mar618

awesome rig and a great video

Thanks.

Originally Posted by Robotboy

Yo that rig is doin' work man
Nice vids as well!

So what electrics did ya settle on? Motor, batts and gearing?

Thanks.

Motor's a 3300kv Reedy, battery is 3s 65c 2250(?) mah Thunder Power or 3s 25c 1300mah Turnigy, gearing is 14/56 32p. Has more punch w/ the Thunder Power but the Turnigy's lighter so they come out fairly close performance wise.

[pattykvistad]

those videos are awsome

[redrustbucket]

Thanks!

[SlickRockSpider]

Originally Posted by redrustbucket

Motor's a 3300kv Reedy, battery is 3s 65c 2250(?) mah Thunder Power or 3s 25c 1300mah Turnigy, gearing is 14/56 32p. Has more punch w/ the Thunder Power but the Turnigy's lighter so they come out fairly close performance wise.

Maybe because the Turnigy (?) will only give you max 33 amps and the Thunder Power will give you max 143 amps.

Evan

[redrustbucket]

Originally Posted by SlickRockSpider

Maybe because the Turnigy (?) will only give you max 33 amps and the Thunder Power will give you max 143 amps.

Evan

I know we've been over this a bit but maybe you can shed some light. I'm really unconcerned with the Turnigy's performance, it came with a set of axles I bought. The Thunder Power is a different matter though.

I pulled this from another thread:

Originally Posted by SlickRockSpider

Max amps discharge formula


(mAh * c rating)/1000 = max discharge amps (mda)

(5000 * 25) * 1000 = 125 mda

If you change the from 5000 to 2500 with the same c rating.

(2500 * 25) * 1000 = 62.5 mda

If you are pulling more 62 amps the performance will be down and a fire just may take place right before you eyes. LOL Just be careful.


Evan

Originally Posted by redrustbucket

So I guess a better answer would be to double the c rating as well. Didn't think of that. Is there a good way to guesstimate amp draw or is one of these necessary?

http://www.activepowersports.com/pro...d-AST101D.html

Amp draw should be able to be measured with a multimeter as well, correct? I need to do some more research on this as well.

My multimeter is only good to 200ma max, so I think that's out.

I'd like to get a better understanding of this. I've searched till my brain hurts.

I bought this battery and motor for my next build but I still don't know how to even guesstimate the probable amp draw of the motor. Any help would be appreciated.

[SlickRockSpider]

I looked and looked. CC pisses me off because they don't list the performance (max amps) of there motors. I would call CC and ask. I have done this for other CC motors. There web site was made for kids ??? They never tell you the info that you need.

Example: They at one time listed there mamba max as being able to deal with 210 amps. I called them and asked. 10 secs @ 140 amps

Call CC and get max amps@ ??? volts for that motor. I can help you from there.



Evan

[redrustbucket]

Couldn't get through so I sent them an e-mail. In the meantime I found some info over on Rcshortcourse :

Car Setup Info
Slash 4x4
SCT MMP 2400kv Combo
Geared 21/52 (22/54 or 20/50), Slipper
Proline Streetfighter Tires
No body shell on car
Gradual rolling start to full throttle high speed tarmac passes
Theoretical speeds listed from scriptasylum calculator
Batteries were fully charged
Ambient Temp was 72f
20 minute cooldown between tests

2s 5000mah 40c Turnigy
Max Amps - 165a
Min Voltage - 6.99v
Max Power - 1167w
Theoretical Speed - 32 mph / 51 kmh
GPS Measured Speed - 37 mph / 59 kmh
Motor Temp - 110f

3s 5000mah 40c Turnigy
Max Amps - 157a
Min Voltage - 10.5v
Max Power - 1670w
Theoretical Speed - 48 mph / 77 kmh
GPS Measured Speed - 53 mph / 85 kmh
Motor Temp - 135f

4s 5000mah 40c Turnigy
Max Amps - 159a
Min Voltage - 14.7v
Max Power - 2360w
Theoretical Speed - 64 mph / 103 kmh
GPS Measured Speed - 67 mph / 108 kmh
Motor Temp - 145f

The Thunder Power is rated for 146A cont. and 292A bursts but I may need more? Thanks, Jeremy.

[SlickRockSpider]

Originally Posted by redrustbucket

Couldn't get through so I sent them an e-mail. In the meantime I found some info over on Rcshortcourse :

Car Setup Info
Slash 4x4
SCT MMP 2400kv Combo
Geared 21/52 (22/54 or 20/50), Slipper
Proline Streetfighter Tires
No body shell on car
Gradual rolling start to full throttle high speed tarmac passes
Theoretical speeds listed from scriptasylum calculator
Batteries were fully charged
Ambient Temp was 72f
20 minute cooldown between tests

2s 5000mah 40c Turnigy
Max Amps - 165a
Min Voltage - 6.99v
Max Power - 1167w
Theoretical Speed - 32 mph / 51 kmh
GPS Measured Speed - 37 mph / 59 kmh
Motor Temp - 110f

3s 5000mah 40c Turnigy
Max Amps - 157a
Min Voltage - 10.5v
Max Power - 1670w
Theoretical Speed - 48 mph / 77 kmh
GPS Measured Speed - 53 mph / 85 kmh
Motor Temp - 135f

4s 5000mah 40c Turnigy
Max Amps - 159a
Min Voltage - 14.7v
Max Power - 2360w
Theoretical Speed - 64 mph / 103 kmh
GPS Measured Speed - 67 mph / 108 kmh
Motor Temp - 145f

The Thunder Power is rated for 146A cont. and 292A bursts but I may need more? Thanks, Jeremy.

Jeremy that Thunder Power batt is an ass kicker. You wont need more. I have been dealing with the lack of info on electronics in the r/c world for way to long. I am in the process in building a dyno that measures pwr both electricl and mechanicaly. I have seen a lot of electrical dynos but never with a mechanical way to confirm. (physics don't lie) I will let you know when it is up and going. This is a long term project 1 year so far. With life and MS I am slow. I will get it doin.


Evan

[redrustbucket]

Thanks very much for your input Evan. Good to know the batt. will work, I'll probably grab another one. Dyno sounds awesome. You have a thread going on it at all? Best of luck with your health.