RCCrawler Forums

Spiftacu1ar · 09-09-2009, 12:33 PM

So, I just ordered 6 (yes 6

, bit of an impulse :-P) 1300mah 20c 3s Turnigy Lipos from hobbycity. I already have chargers and whatnot. My question is basically about the motors. I have never used more than 8cell nimh with a brushed motor. Will the lipos play nice with a tekin 55t motor (that came in the FXR combo). I know the esc can handle it, but not sure if the motor will be happy.

Also 1300mah 20c is adequate, right? thats like 26amps. Considering that the dig switches people use for the clod are only rated to 12 amps, i figured it would be fine.

I know the rest of my equipment can handle the 3s lipo, but i wasn't sure about the motor itself. THanks.

JohnRobHolmes · 09-09-2009, 12:37 PM

Yeah, your motors will be fine. Just watch the heat on the lipo and keep it under 110f.

Spiftacu1ar · 09-09-2009, 12:49 PM

cool thanks. I will shove one of my nomadio temp sensors on the velcro strap

Ktbone · 09-09-2009, 01:17 PM

I use that same setup with no issues what-so-ever.

Raguvian · 09-09-2009, 03:15 PM

Damn rich people.

1supra · 09-09-2009, 03:37 PM

Quote:

Originally Posted by Raguvian

Damn rich people.

agreed

Spiftacu1ar · 09-09-2009, 03:40 PM

Quote:

Originally Posted by Raguvian

Damn rich people.

Quote:

Originally Posted by 1supra

agreed

packs are $9 each.

JeepinDoug · 09-09-2009, 11:45 PM

Double check your cell voltages on those batteries before you finish charging them. If they are good, balance charge them for at least the first 6 charges.
Hobby city is known for sending out bad batteries now and then and it cost triple to exchange them.
Pack price is worth the wager.

DrunkDriver · 09-10-2009, 01:00 AM

I just ordered 4 of the same pack from the same site. They best get here soon or I will blame you for buying them out

I also have a FXR and am using a 35T, both the motor and esc get a little warm. I wonder, would the extra voltage wear the motor out faster? 3s lipo is sexy.

Drunk

Spiftacu1ar · 09-10-2009, 01:06 AM

^^Well, I almost bought 10

, but decided on 6, cuz I will never need all 10, lol. So, by buying only 6, I saved you 4

Quote:

Originally Posted by JeepinDoug

Double check your cell voltages on those batteries before you finish charging them. If they are good, balance charge them for at least the first 6 charges.
Hobby city is known for sending out bad batteries now and then and it cost triple to exchange them.
Pack price is worth the wager.

+1
I always balance charge my packs. Its a good habbit to follow. I also have 2 lipo sacks.

Spiftacu1ar · 09-10-2009, 07:33 PM

How much run time you expect I will get with each pack? I am running a JR d8711 up front, and a traxxas digital servo in the back all on an FXR and CCBEC. (4ws). 55t motor as stated above. Will it be better runtime than a 1500mah nimh?

JohnRobHolmes · 09-10-2009, 07:40 PM

A bit less. 1300mah is less than 1500mah. You will notice better punch and wheelspeed through the discharge though.

Spiftacu1ar · 09-10-2009, 09:57 PM

I was hoping it might be alittle longer in practice becasue of the flatter voltage curve. My main porbelm with the 1500mah is actually that as I near the end of the charge, i lose conection everytime i turn the wheels, b/c my servos draw a lot of pwoer, and dip the voltage enuogh that the reciever resets. If I don't turn the wheels much, I can get another 10 mins of WOT trail running. As soon as I turn, it sests though, lol.

DrunkDriver · 09-10-2009, 11:18 PM

I have a 1300 mah 3s 20c pack, and with my single hitec HTMG and the 35T I get about 45min of crawling time. I run it in a scx10.

Drunk

stianl · 09-11-2009, 12:09 AM

Quote:

Originally Posted by Spiftacu1ar

I was hoping it might be alittle longer in practice becasue of the flatter voltage curve. My main porbelm with the 1500mah is actually that as I near the end of the charge, i lose conection everytime i turn the wheels, b/c my servos draw a lot of pwoer, and dip the voltage enuogh that the reciever resets. If I don't turn the wheels much, I can get another 10 mins of WOT trail running. As soon as I turn, it sests though, lol.

If we use a simple Ohms law on this, and assume that the amount of power (measured in watts) is the same with botn nihm and lipo, then you'ld probably draw a bit less Amp from the lipo than the nihm. And compared to a 9,6 volts nihm 1500mah, you would probably get the same running time.

Sorry if my technical english is bad

Spiftacu1ar · 09-11-2009, 12:10 AM

sweet thanks. I forgot about the increased votlage :P.

09-09-2009, 12:33 PM	#1
Spiftacu1ar Quarry Creeper Join Date: Aug 2009 Location: Palo Alto, Bay Area Posts: 218	going LIPO, some q's So, I just ordered 6 (yes 6 , bit of an impulse :-P) 1300mah 20c 3s Turnigy Lipos from hobbycity. I already have chargers and whatnot. My question is basically about the motors. I have never used more than 8cell nimh with a brushed motor. Will the lipos play nice with a tekin 55t motor (that came in the FXR combo). I know the esc can handle it, but not sure if the motor will be happy. Also 1300mah 20c is adequate, right? thats like 26amps. Considering that the dig switches people use for the clod are only rated to 12 amps, i figured it would be fine. I know the rest of my equipment can handle the 3s lipo, but i wasn't sure about the motor itself. THanks.

09-09-2009, 12:37 PM	#2
JohnRobHolmes owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down! Posts: 20,290	Yeah, your motors will be fine. Just watch the heat on the lipo and keep it under 110f.

09-09-2009, 12:49 PM	#3
Spiftacu1ar Quarry Creeper Join Date: Aug 2009 Location: Palo Alto, Bay Area Posts: 218	cool thanks. I will shove one of my nomadio temp sensors on the velcro strap

09-09-2009, 01:17 PM	#4
Ktbone Quarry Creeper Join Date: Jun 2009 Location: Who's asking? Posts: 343	I use that same setup with no issues what-so-ever.

09-09-2009, 03:15 PM	#5
Raguvian Quarry Creeper Join Date: Sep 2009 Location: Bay Area Posts: 291	Damn rich people.

09-09-2009, 11:45 PM	#8
JeepinDoug RCC Addict Join Date: Mar 2008 Location: SSF Posts: 1,614	Double check your cell voltages on those batteries before you finish charging them. If they are good, balance charge them for at least the first 6 charges. Hobby city is known for sending out bad batteries now and then and it cost triple to exchange them. Pack price is worth the wager.

09-10-2009, 01:00 AM	#9
DrunkDriver Quarry Creeper Join Date: Aug 2009 Location: Fresno Posts: 338	I just ordered 4 of the same pack from the same site. They best get here soon or I will blame you for buying them out I also have a FXR and am using a 35T, both the motor and esc get a little warm. I wonder, would the extra voltage wear the motor out faster? 3s lipo is sexy. Drunk

09-10-2009, 07:33 PM	#11
Spiftacu1ar Quarry Creeper Join Date: Aug 2009 Location: Palo Alto, Bay Area Posts: 218	How much run time you expect I will get with each pack? I am running a JR d8711 up front, and a traxxas digital servo in the back all on an FXR and CCBEC. (4ws). 55t motor as stated above. Will it be better runtime than a 1500mah nimh?

09-10-2009, 07:40 PM	#12
JohnRobHolmes owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down! Posts: 20,290	A bit less. 1300mah is less than 1500mah. You will notice better punch and wheelspeed through the discharge though.

09-10-2009, 09:57 PM	#13
Spiftacu1ar Quarry Creeper Join Date: Aug 2009 Location: Palo Alto, Bay Area Posts: 218	I was hoping it might be alittle longer in practice becasue of the flatter voltage curve. My main porbelm with the 1500mah is actually that as I near the end of the charge, i lose conection everytime i turn the wheels, b/c my servos draw a lot of pwoer, and dip the voltage enuogh that the reciever resets. If I don't turn the wheels much, I can get another 10 mins of WOT trail running. As soon as I turn, it sests though, lol.

09-10-2009, 11:18 PM	#14
DrunkDriver Quarry Creeper Join Date: Aug 2009 Location: Fresno Posts: 338	I have a 1300 mah 3s 20c pack, and with my single hitec HTMG and the 35T I get about 45min of crawling time. I run it in a scx10. Drunk

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09-11-2009, 12:10 AM	#16
Spiftacu1ar Quarry Creeper Join Date: Aug 2009 Location: Palo Alto, Bay Area Posts: 218	sweet thanks. I forgot about the increased votlage :P.

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