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Posted

I need a good battery and charger for a RTR hornet...can someone please recommend one for me?....I also own a sand scorcher and brat.

thanks

Posted

Personally, I would be looking at getting a LiPo "Shorty" pack like this one..

http://www.hobbyking.com/hobbyking/store/__23134__Turnigy_nano_tech_Shorty_4200mah_2S2P_65_130C_Hardcase_Lipo_Pack_ROAR_APPROVED_.html

Being only 96mm long, its shorter than a standard 5 cell NiCd or NiMh, so it should fit in the Hornet and Scorcher with no problems, although you may need to add some padding to keep it centered in the Brats battery compartment, even with the holders turned around..

Just check the "Height" of the battery compartment on the Hornet so ensure that the LiPo will fit @ 25 mm high..

Because you are probably using the Tamiya ESC's that don't have a LiPo Low Voltage cutoff, you will need a Low voltage LiPo alarm like this..

http://www.hobbyking.com/hobbyking/store/__22749__On_Board_Lipoly_Low_Voltage_Alarm_2s_3s.html

Don't forget to grab a LiPo charging sack if you don't already have one..

http://www.hobbyking.com/hobbyking/store/__4134__Lithium_Polymer_Charge_Pack_18x22cm_Sack.html

For a charger, an IMAX B6AC that allows charging from the mains or 12V DC (car battery) would probably suit your needs..

http://www.hobbyking.com/hobbyking/store/__6478__IMAX_B6_AC_Charger_Discharger_1_6_Cells_GENUINE_.html

Posted

Personally, I would be looking at getting a LiPo "Shorty" pack like this one..

http://www.hobbyking.com/hobbyking/store/__23134__Turnigy_nano_tech_Shorty_4200mah_2S2P_65_130C_Hardcase_Lipo_Pack_ROAR_APPROVED_.html

Being only 96mm long, its shorter than a standard 5 cell NiCd or NiMh, so it should fit in the Hornet and Scorcher with no problems, although you may need to add some padding to keep it centered in the Brats battery compartment, even with the holders turned around..

Just check the "Height" of the battery compartment on the Hornet so ensure that the LiPo will fit @ 25 mm high..

Because you are probably using the Tamiya ESC's that don't have a LiPo Low Voltage cutoff, you will need a Low voltage LiPo alarm like this..

http://www.hobbyking.com/hobbyking/store/__22749__On_Board_Lipoly_Low_Voltage_Alarm_2s_3s.html

Don't forget to grab a LiPo charging sack if you don't already have one..

http://www.hobbyking.com/hobbyking/store/__4134__Lithium_Polymer_Charge_Pack_18x22cm_Sack.html

For a charger, an IMAX B6AC that allows charging from the mains or 12V DC (car battery) would probably suit your needs..

http://www.hobbyking.com/hobbyking/store/__6478__IMAX_B6_AC_Charger_Discharger_1_6_Cells_GENUINE_.html

all this good for a 13 turn brushed motor?.....or say i wanna go brushless do i just need a brushless speed controller?

Posted

I don't think that that battery would have any problems running a 13 turn Brushed motor, HOWEVER, a 13 turn Brushed motor is pretty fast, and may be a bit much for all of those buggies that you listed..

OK, Brushless motors 1 on 1... To keep things simple, Brushless motors are a completely different design to brushed motors..

A brushed system only has 2 wires running between the ESC and the motor where a brushless system has 3 power wires running between the ESC and Motor..

Some Brushless ESC's are "backward compatible" meaning that they will run both Brushed and Brushless motors..

The major benefit of brushless technology is improved efficiency, and less maintenance..

There are also two types of brushless systems, being sensored, and non-sensored (or sensorless).. Sensored systems have a 4th lead / cable running between the ESC and motor which tells the ESC the rotors position in the magnetic field in the motor.... Sensored systems are usually more expensive than non-sensored systems, but Sensored systems do offer a smoother power delivery..

If you are wanting to try a brushless motor, then you are probably best to buy a brushless system or combo of motor and ESC.. The Hobbywing systems are quite popular, and are good value for the money..

A Hobbywing 13 turn non-sensored Brushless system is probably as fast as a Tamiya Sports tuned motor, and well suited to most vintage models..

Posted

I don't think that that battery would have any problems running a 13 turn Brushed motor, HOWEVER, a 13 turn Brushed motor is pretty fast, and may be a bit much for all of those buggies that you listed..

OK, Brushless motors 1 on 1... To keep things simple, Brushless motors are a completely different design to brushed motors..

A brushed system only has 2 wires running between the ESC and the motor where a brushless system has 3 power wires running between the ESC and Motor..

Some Brushless ESC's are "backward compatible" meaning that they will run both Brushed and Brushless motors..

The major benefit of brushless technology is improved efficiency, and less maintenance..

There are also two types of brushless systems, being sensored, and non-sensored (or sensorless).. Sensored systems have a 4th lead / cable running between the ESC and motor which tells the ESC the rotors position in the magnetic field in the motor.... Sensored systems are usually more expensive than non-sensored systems, but Sensored systems do offer a smoother power delivery..

If you are wanting to try a brushless motor, then you are probably best to buy a brushless system or combo of motor and ESC.. The Hobbywing systems are quite popular, and are good value for the money..

A Hobbywing 13 turn non-sensored Brushless system is probably as fast as a Tamiya Sports tuned motor, and well suited to most vintage models..

thanks so much!...i totally understood that....lol

heres another thing....im gonna be after the metallic hornet...now im reading that it might come with a esc that handles brushed and brushless....still not sure if it will accept lipos?

Posted

I don't think that will fit - the battery leads come out the top of the battery. This will not sit flush in the chassis.

Would a battery with the leads coming out the end be required ?

Posted

that's a good question...im not sure...it might be ok in the SS?...but the hornet has that battery compartment and I haven't seen that in 30 years...

Posted

I don't think that will fit - the battery leads come out the top of the battery. This will not sit flush in the chassis.

Would a battery with the leads coming out the end be required ?

Maybe not...

I did think that one could drill two 6mm (1/4 inch) holes in the chassis without too much trouble, and allow the leads to pass through the chassis, and plug into the battery that way...

BUT Yes, a shorty pack with leads would probably be better than one like the one posted with "corrally" style connectors..

(The link was posted as an example of a shorty pack and its dimensions..)

Posted

That is a soft case LiPo, and not recommended for vehicles where the battery is exposed and could be punctured like in your Brat, or when the battery door falls off the Hornet..

When you puncture the soft aluminium case of the LiPo cells, they can catch fire / burst into flames..

AND @ 135mm long, it is longer than a 5 cell, or 6 cell hump pack NiCd/NiMh, so it may not fit in the Scorcher's box..

The shorty LiPo I suggested is a Hard case pack, meaning that it has a hard plastic outer case covering the LiPo cells.. A soft case pack only has a layer of heat shrink and some tape protecting the cells, so they are more susceptible to damage..

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