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HelicopterOff Topics › Traxxas Slash 4x4
10-05-2017 08:35 PM  66 days agoPost 1
datidun

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N Ireland

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Anybody have the Traxxas Slash, had mine for a few weeks but cant understand why the run time is so short, getting 8 to 9 minutes tops, running a fan on the esc and motor to keep the temps down, the rest is all stock, did research most guys getting around 20 minutes,tried 3s 5000mah and 2s 5000 getting the same result.

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10-05-2017 08:48 PM  66 days agoPost 2
Pistol Pete

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Seffner, FL

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Is the fan stock?

~~Enjoying the hobby one flight at a time~~

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10-05-2017 11:13 PM  66 days agoPost 3
datidun

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N Ireland

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No I bought both fans seperately, the fans seem to be working well, I have also drilled small holes front and back for air to circulate, can keep my finger on motor for 4 to 5 seconds .

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10-05-2017 11:18 PM  66 days agoPost 4
Dan Minick

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Columbus, WI

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Are your batteries taking their full capacity? How old are they?

Team Synergy, Team FBL Rotors-------if its not broke...it will be!

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10-06-2017 12:32 AM  66 days agoPost 5
MWRLa

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Addis La United States

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Make sure you have the pinion set properly and not too close to the spur gear. This can kill a battery and not be that noticeable when you drive it.

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10-06-2017 03:05 AM  66 days agoPost 6
bulldogs

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~OC~ ,CA USA

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What c rating are the lipos ?

~TEAM OCHC~
A strong man stands up for himself a STRONGER man will stand up for others.

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10-06-2017 08:51 AM  66 days agoPost 7
datidun

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N Ireland

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Ok I have one 2s which is 5000 mah 60c
And two 3s 5000 mah 30c, Im using a dust cover by Dusty motors its hard to say if it resticts the air flow, the batteries were all bought new and had around 10 runs each, I had another go with the 3s and only got over 8 minutes, had a look at the pinion it lools ok, will phone the dealer and see what they say, Im sure it should run longer than that, low voltage cut off is 3.2v so it stops completly there.
Batteries are charging ok watching the cells coming of charger at 4.2 v per cell,gonna check the pinion again, a4 paper test.

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10-06-2017 10:41 AM  66 days agoPost 8
datidun

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N Ireland

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Ok had a chat with them, they said the capacity needs to be set higher on charger set to 6000 mah, I dont get it capacity is the charge rate

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10-06-2017 12:59 PM  66 days agoPost 9
Dan Minick

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Columbus, WI

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Batteries are charging ok watching the cells coming of charger at 4.2 v per cell
A battery can still charge to the proper voltage without taking the proper capacity. We need to know what capacity (MAH) you are putting back in not voltage.
Ok had a chat with them, they said the capacity needs to be set higher, set to 6000 mah, I dont get it capacity is the charge rate
Who is them? What are you setting? ESC? Charger? You should be able to set charge rate independent from capacity, just because you have a 5000 mah pack doesn't mean you HAVE to charge at 5 amp. You can still charge at 5 amp with a capacity set at 6000. You should not have to do that anyway but whatever works I guess.

Team Synergy, Team FBL Rotors-------if its not broke...it will be!

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10-06-2017 02:50 PM  65 days agoPost 10
datidun

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N Ireland

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Not setting anything read the post,Like I said the dealer, will check again exactly what I put in, what the dealer is saying the capacity cut off, not sure they are using the correct term thats were the confusion comes in, on my new charger Dynamite ultra passport 220w, it does not have capacity cut off.

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10-06-2017 03:08 PM  65 days agoPost 11
Pistol Pete

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Seffner, FL

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Charger Manual Page 7

Check settings for:

SET TIMER and CAPACITY CUT OFF

Most if not all modern chargers have those two settings.

~~Enjoying the hobby one flight at a time~~

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10-06-2017 06:46 PM  65 days agoPost 12
datidun

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N Ireland

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No such thing as Capacity cut off with the Dynamite passport ultra 220w,page 7 Nickel cycle charging.

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10-07-2017 02:07 PM  65 days agoPost 13
Dan Minick

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Columbus, WI

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No, it looks like your charger does not have that capability. Please report what capacity you are putting back into the pack after a run when you can.

Team Synergy, Team FBL Rotors-------if its not broke...it will be!

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10-07-2017 03:50 PM  64 days agoPost 14
Pistol Pete

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Seffner, FL

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Sorry, I downloaded the incorrect manual given they have two similar "Passport Ultra" chargers. You seem to have the most recent of the two.

I asked about fan you installed after market as it also draws current. Consider testing without fan (and dust cover) to verify IF it has a major impact in your run time.

~~Enjoying the hobby one flight at a time~~

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10-08-2017 08:33 AM  64 days agoPost 15
datidun

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N Ireland

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Hi had another go, only got 9 minutes on each battery which are all 5000 mah, the charger seems to be working perfectly as it is putting back in 4750 mah at 12.6v and 4.2 per cell,this was not on grass but a gravel track half throttle and short bursts of full throttle, can anybody confirm more or less what they are getting on a 3s 5000 mah 30c, I recalibrated the esc to see if it made a differance,there are two fans running and the audio sound but would not think they would draw a lot of cuttent
Also in theory the 2s 60c 5000 should run longer than the 3s 5000 30c, the dust cover makes me wonder but its needed as small gravel gets into the drive shaft.

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10-08-2017 01:26 PM  64 days agoPost 16
gmcullan

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Southbridge, MA

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Ah, audio too? The use of the fans, coupled with the use of the audio at high volume WILL reduce your run time by 25-30%. I work for a Traxxas dealer and we see this all the time.

Shut off the audio and ditch the fans. Unless you are seriously abusing the vehicle you don't need the fans.

Gerry Cullan,
Gaui 200, 255; T-Rex 250, 450 SE & SA, Mini-Titan, Blade 450

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10-08-2017 01:39 PM  64 days agoPost 17
datidun

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N Ireland

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Do you think the dust cover prevents airflow,I will take the fan of the motor but concerned about heat build up, well Im only guessing if it was running to hot it would shut down, but from the motor or the esc, maybe keep the fan on the esc.

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10-08-2017 01:55 PM  64 days agoPost 18
gmcullan

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Southbridge, MA

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The dust cover is only useful if you are running a brushed motor. A brushless motor does not need a dust cover.

Another issue is motor efficiency. I'm not sure what you are using for a motor. A brushed motor is only going to turn about 75% of the energy you put into it as useful work. With a brushless motor, your efficiency jumps to around 90%.

Gerry Cullan,
Gaui 200, 255; T-Rex 250, 450 SE & SA, Mini-Titan, Blade 450

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10-08-2017 02:02 PM  64 days agoPost 19
datidun

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N Ireland

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I have the VXL 3 think it 3500kv Mike Jenkins addition 4x4 brushless,the blue drive shaft is a problem getting grit and small stones caught up, thats why the dust cover is used.

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10-08-2017 03:06 PM  63 days agoPost 20
gmcullan

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Southbridge, MA

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OK, brushless motor , good. Dust cover to protect the drive shaft, good, unless it is trapping grit and rocks, thus adding drag to the drive shaft.

Regarding the audio system, we had one as a shop demonstrator. It was quite loud and really ate into the battery life.

I see you're from N. Ireland. My family originally hails from County Galway. I've been in 29 countries but have not been able to visit Ireland. I really have to do so.

Gerry Cullan,
Gaui 200, 255; T-Rex 250, 450 SE & SA, Mini-Titan, Blade 450

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HelicopterOff Topics › Traxxas Slash 4x4
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