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Speed Problem - 9/30/2012 6:26 PM

cjhike

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From: , BC, CANADA
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Hey, just purchased by first hobby grade R/C today, a HPI RACING MINI-TROPHY - #103034. I am running a 2C 7.4 - 5000mah LIPO and the truck ran great on the first run which I stopped after about 15 minutes. On the 2nd run it would only run at about 1/2 speed for 10 minutes then really started to slow down, stopped it and could smell something burning. Disconnected the battery right away and pulled it out - no smell from the battery.

Let it all cool down overnight and hooked it up in the morning, no smell however running extremely slow - like walking speed.

Checked the voltage on the battery it is right up - tried resetting the throttle setting on the transmitter, nothin'.

Any ideas?

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RE: Speed Problem - 9/30/2012 6:45 PM

SyCo_VeNoM

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probably the motor
If I remember it right its brushed (if it is) pull the 2 wires off that go to the esc, and connect it straight to the battery. If the motor spins fast then its the ESC.

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RE: Speed Problem - 9/30/2012 7:47 PM

cjhike

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Thanks! Did that and it appears to be spinning at same speed.

Will take it back to the store - should be a warranty fix hopefully!

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RE: Speed Problem - 10/1/2012 1:06 AM

The_Shark

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lipo eats brushed motors just so you know...

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RE: Speed Problem - 10/1/2012 2:06 AM

Haddi Taha

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quote:

ORIGINAL: The_Shark

lipo eats brushed motors just so you know...

I normally run silvercans and lipo with good luck but yeah, brushed motors cannot handle lipo that well. You can get a cheap brushless system from hobbypartz which will give you more speed, runtime and will last longer. If you are going to pay more than $40 for a brushed esc, go to brushless.

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RE: Speed Problem - 10/1/2012 6:29 PM

cjhike

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From: , BC, CANADA
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Called HPI - they are mailing out a new motor under warranty. Took the LIPO back to the Hobby Store where purchased and got a Nimh instead - hopefully the replacement motor will last longer!

Thanks for the help and recommendations!

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RE: Speed Problem - 10/1/2012 7:10 PM

SyCo_VeNoM

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quote:

ORIGINAL: Haddi Taha

quote:

ORIGINAL: The_Shark

lipo eats brushed motors just so you know...

I normally run silvercans and lipo with good luck but yeah, brushed motors cannot handle lipo that well. You can get a cheap brushless system from hobbypartz which will give you more speed, runtime and will last longer. If you are going to pay more than $40 for a brushed esc, go to brushless.

ditto run my tamiya 27t motors fine on lipo
only way it would burn a motor out is if the vehicle is geared high from the get go.

Also the HPI motors if its the 15t those are turds.. I had one burn out in 4 mins on NiMh

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Look at my garage for my model list.

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RE: Speed Problem - 10/2/2012 2:32 AM

Haddi Taha

Posts: 1889
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From: Sydney, AUSTRALIA
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quote:

ORIGINAL: SyCo_VeNoM

quote:

ORIGINAL: Haddi Taha

quote:

ORIGINAL: The_Shark

lipo eats brushed motors just so you know...

I normally run silvercans and lipo with good luck but yeah, brushed motors cannot handle lipo that well. You can get a cheap brushless system from hobbypartz which will give you more speed, runtime and will last longer. If you are going to pay more than $40 for a brushed esc, go to brushless.

ditto run my tamiya 27t motors fine on lipo
only way it would burn a motor out is if the vehicle is geared high from the get go.

Also the HPI motors if its the 15t those are turds.. I had one burn out in 4 mins on NiMh

tamiya silvercans are surprisingly reliable

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Thunder Tiger MT4- Hobbywing 4274sd 2200kv motor- Savox 1256tg Servo

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Post #: 8

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