Official Thunder Tiger e-MTA Thread
#61
Do you lose any power at all by running two packs, through the cables?
Was just at the LHS checking out chargers and batteries, and holy c.rap these lipo batteries are huge!.. A 6S was like a huge brick..
Charger-wise, the guy kind of convinced me that 10a is not necessary, and that 5a is enough.. And that when charging, take the last two digits off the mah number for the charging setting.. I.e., charge at 3.7a for a 3700 lipo.. Rough guideline he said..
I really am a total electric newb...
Was just at the LHS checking out chargers and batteries, and holy c.rap these lipo batteries are huge!.. A 6S was like a huge brick..
Charger-wise, the guy kind of convinced me that 10a is not necessary, and that 5a is enough.. And that when charging, take the last two digits off the mah number for the charging setting.. I.e., charge at 3.7a for a 3700 lipo.. Rough guideline he said..
I really am a total electric newb...
1. the lower the Amps during charging the better it is - it stores more and batteries will last longer. I follow the 'trickle charging' concept. Drawback - it takes such a long time to charge.
2. i always take maximum 75% of the amps during charge. ie..if charging a 5000Mah lipo..i would set it to at most 3.5A during charge...note: at most follows the 75% and if lower, it follows the trickle charging as point 1. a balance of your own time to charge..
3. I always avoid fast charge if i can help it...this is against my point 1.
true..i believe you dont need a 10A charger..a standard 5A intelligent charger is sufficient. A 10A charger will allow you to charge at higher Amps and lower time to charge..but in my opinion, it is at the expense of the life of the lipo..as it is against my rule of thumb of point 1 and point 2.
if you are a racer - then you may need a 10A charger...where you need to charge fast in between heats and after 1 or 2 races..you will 'throw/give away the battery'. Racers tend to charge it with high amps and as fast as possible to get the most of the lipo performance during races at the expense of longer battery life.
the same goes to ESC and motor..i follow the 75% maximum rule of thumb - the max I will set in terms of load(ESC and motor pinion/spur) is 75% as there are other external factors that will increase that 75% to higher..ie. playing in tall grass/loose sandy beach or even on an extremely dry/hot weather..this will increase the 75% to a number that is higher...imagine this..normal setup is 90% tile..when you go on tall grass, where it will increase the load, it will hit 100% or more(tendency to burn) very easily.
above is my rule of thumb in general lay-mans term.
#62
Thread Starter
Tech Adept
Joined: Aug 2012
Posts: 101
Do you lose any power at all by running two packs, through the cables?
Was just at the LHS checking out chargers and batteries, and holy c.rap these lipo batteries are huge!.. A 6S was like a huge brick..
Charger-wise, the guy kind of convinced me that 10a is not necessary, and that 5a is enough.. And that when charging, take the last two digits off the mah number for the charging setting.. I.e., charge at 3.7a for a 3700 lipo.. Rough guideline he said..
I really am a total electric newb...
Was just at the LHS checking out chargers and batteries, and holy c.rap these lipo batteries are huge!.. A 6S was like a huge brick..
Charger-wise, the guy kind of convinced me that 10a is not necessary, and that 5a is enough.. And that when charging, take the last two digits off the mah number for the charging setting.. I.e., charge at 3.7a for a 3700 lipo.. Rough guideline he said..
I really am a total electric newb...
Yes. Charge 5,000mah at 5a and 5,600mah at 5.6a. The faster you charge, the more likely the lipo will be damaged, however I have charged my 6,000mah lipos at 8a before.. They just get hot but the charging time is reduced.
After everyrun, wait until the lipo cools down before charging. Wait until the chemicals in the pack settle. Otherwise the lipo will 'swell' up and might explode. Do not discharge a lipo until it's pass 3.7v per cell. Otherwise damage will be made and the lipo pack might swell and explode.
The more expensive, newer lipos are alot safer than what I've mentioned, but I've seen airsoft guys get lipos pop inside of their guns and the white smoke from the pack was just scary. (He was using a cheap chinese pack).
I have had about 4x 2s lipo packs swell in my first year of trying out electric. It' s more work than I thought. Just make sure you understand how to take care of the lipos.
this will help:
http://www.rchelicopterfun.com/rc-lipo-batteries.html
http://batteryuniversity.com/learn/a..._ideal_battery
http://evmc2.wordpress.com/2012/03/1...eding-of-lipo/
http://www.rcgroups.com/forums/showthread.php?t=209187
#63
Tech Initiate
Joined: Sep 2012
Posts: 26
Guys, really struggling here to decide on my first 8th scale brushless..
It would be mostly for bashing, but I would like to be able to run on a track now and then. I had been thinking about the RC8.2e RTR or SC8.2e, but there seem to be some doubts about the electronics(something about which I have no clue..)
But I've just come across some pretty good deals on the TT trucks - the MT4 G3, ST-4, and E-MTA.
Basically, these are my options, with prices:
1.) AE SC8.2E, €505 shipped.
2.) AE RC8.2E RTR, €495 shipped.
3.) TT MT4 G3 €420 shipped.
4.) TT E-MTA €420 shipped.
5.) TT ST-4 €355 shipped.
6.) AE SC10 RS RTR, €240 shipped, plus €50-60 in RPM arms and bumper. Nice that it's cheaper, but it's still another RC that doesn't share parts with my existing cars.
The TT ST-4 would make sense in that it would be bashable but also decent on a track, if not as good as the AE RC8.2e. It's just so freakin' ugly.. I guess a minus point with the ST-4 is that it too can only run 4S.
Anyway, what do you guys think would be the best investment? I want lots of high-speed passes, running on grass, parking lots, and tracks for breaks between nitro runs, as well as the local park among people out for their Sunday walk..
I'd be keen for all input. Most specifically:
1.) How are the AE Reedy motors in the AE SC8.2e and RC8.2e RTR buggy?
2.) MT4 G3 vs. E-MTA
3.) ST-4 just as good for bashing as the others, but also at least minimally track-worthy?
I should also add, the AE cars have the big advantage in my case in that I already run a nitro SC8, RC8.2, and RC8T, and have lots of parts....
Thanks...
It would be mostly for bashing, but I would like to be able to run on a track now and then. I had been thinking about the RC8.2e RTR or SC8.2e, but there seem to be some doubts about the electronics(something about which I have no clue..)
But I've just come across some pretty good deals on the TT trucks - the MT4 G3, ST-4, and E-MTA.
Basically, these are my options, with prices:
1.) AE SC8.2E, €505 shipped.
2.) AE RC8.2E RTR, €495 shipped.
3.) TT MT4 G3 €420 shipped.
4.) TT E-MTA €420 shipped.
5.) TT ST-4 €355 shipped.
6.) AE SC10 RS RTR, €240 shipped, plus €50-60 in RPM arms and bumper. Nice that it's cheaper, but it's still another RC that doesn't share parts with my existing cars.
The TT ST-4 would make sense in that it would be bashable but also decent on a track, if not as good as the AE RC8.2e. It's just so freakin' ugly.. I guess a minus point with the ST-4 is that it too can only run 4S.
Anyway, what do you guys think would be the best investment? I want lots of high-speed passes, running on grass, parking lots, and tracks for breaks between nitro runs, as well as the local park among people out for their Sunday walk..
I'd be keen for all input. Most specifically:
1.) How are the AE Reedy motors in the AE SC8.2e and RC8.2e RTR buggy?
2.) MT4 G3 vs. E-MTA
3.) ST-4 just as good for bashing as the others, but also at least minimally track-worthy?
I should also add, the AE cars have the big advantage in my case in that I already run a nitro SC8, RC8.2, and RC8T, and have lots of parts....
Thanks...
Can you tell me where you find the e-mta for 420 € include shipping please ?
#64
Tech Champion

Joined: Jan 2011
Posts: 6,299
Nowhere now.. I bought my MT4 for that, and the shop offered me the E-MTA for the same price before they were in stock. Once he got them though the price shot up to €479. You can get them for €450 + shipping though from at least one German shop..
#65
Thread Starter
Tech Adept
Joined: Aug 2012
Posts: 101
#66
Tech Champion

Joined: Jan 2011
Posts: 6,299
Very much so.. Glad I went with it over the E-MTA and SC8.2e or some 10th scale SC.
Great value for money, and brushless is more fun than I would have wanted to admit. But all the anti-nitro trash-talking put me on the defensive... It's a trip to walk through the neighborhood with this crazy fast RC. You can run it in areas here where if you went with nitro they'd call the police.. I can walk out the front door and turn it on, and drive it up to the public park with families walking around, etc..
Great value for money, and brushless is more fun than I would have wanted to admit. But all the anti-nitro trash-talking put me on the defensive... It's a trip to walk through the neighborhood with this crazy fast RC. You can run it in areas here where if you went with nitro they'd call the police.. I can walk out the front door and turn it on, and drive it up to the public park with families walking around, etc..
#67
Thread Starter
Tech Adept
Joined: Aug 2012
Posts: 101
I still prefer nitro but electric just has waay more power.
#70
I Agree...but have you ever run a really powerful nitro ? I only ask as I feel very few people ever experience nitro's full capabilities....At my track the Nitro's are faster then the BL cars....The BL has more instant power, but once rolling the nitro's are a litle faster.....Now of course all the nitro's at my track are high powered modifieds which makes a big difference....
#72
#73
Tech Champion

Joined: Jan 2011
Posts: 6,299
Crazy.. Just went downstairs to run up and down the road since, being New Year's Eve, everything is in a state of chaos anyway.. Plugged in the bat, turned everything on, hit the throttle, and............................................... ......... wwwwhhhrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr..
"Great, something's fxxxed..." I thought. Nope.. Took the bod and cage off, and saw there was no pinion!! Ran yesterday flawlessly, turned it off, threw it in the car.. Anyway, looked around the sidewalk for it for about ten minutes. Came back inside, looked around in the truck, didn't see anything, then held it upside down and shook it. Out plopped the pinion. Threadlock is drying on a well-screwed in grub screw now..
(ps Checked it before running a week ago- seemed fine.. Oh well... Should have checked again...)
"Great, something's fxxxed..." I thought. Nope.. Took the bod and cage off, and saw there was no pinion!! Ran yesterday flawlessly, turned it off, threw it in the car.. Anyway, looked around the sidewalk for it for about ten minutes. Came back inside, looked around in the truck, didn't see anything, then held it upside down and shook it. Out plopped the pinion. Threadlock is drying on a well-screwed in grub screw now..

(ps Checked it before running a week ago- seemed fine.. Oh well... Should have checked again...)
#74
LOL , yeah ..... always loctite the set screw on the pinion . Or any metal into metal screws for that matter .......
Glad to see you are enjoying the truck , I was a nitro head for a long time till I moved to where I am now and the neighbors started to complain about the noise , before that I hated electrics cause they had no power and short runtimes (and they did) . But brushless motors and LiPo batteries have changed all that .
Now I set out lights when it gets dark and keep running cause they dont mind the electrics at all .
Glad to see you are enjoying the truck , I was a nitro head for a long time till I moved to where I am now and the neighbors started to complain about the noise , before that I hated electrics cause they had no power and short runtimes (and they did) . But brushless motors and LiPo batteries have changed all that .
Now I set out lights when it gets dark and keep running cause they dont mind the electrics at all .


