8 replies to this topic

[santiaglo]

Hi all,
So did everyone had a good christmas and new year? Mine was good because i had lots of fun with my little boy and his dagger i got him, and yesterday igot my bruiser up and running and it's like being a kid all over again! Anyway i have a problem which i hope someone can help me with. I have being using 7.2v packs of 1700mAh and 1500mAh which allows it to run ok, but i would like to use my yuasa/tamiya np4-6w 6.v battery because of the 4000mAh. I have lost the charger and want to know the best way to go about charging it?
I tried a vottage meter this morning and the pack has 0.65v. Being away from rc's for so long i dont whether it's worth trying to use this pack or if there is a modern equal that would give good run times.
Whats the highest vottage packs that the motor and electrics will handle. Any help would be great

chris

[smallman28]

Use two of the 7.2v packs you have and wire them in paralell,it will double the mah from say 1700 to 3400 but the voltage will stay at 7.2v.

[DJTheo]

Use better modern 7.2V 3000-3600mAh NiMH stickpacks and a modern charger, will give you much more fun and power.
Cheers

[santiaglo]

thanks fo the tip on batt packs theo, but could you tell me if the bruiser will take any of these larger race packs? i.e the 8.4v, 9.6v, and even 12v 10cell packs!! what rc's use these packs and would there be any major benfits for my bruiser or my sons dagger?


thanks

santiaglo

[Stevenchat2000]

should handle 8.4 but you will have to solder/reconfigure the extra cell else where to make it fit.
Go any higher on voltage and you will burn the speedo and motor out , I would buy new cells for that old large 6 volt pack you have , some one said the other day you can get those D type cells now in 8000mah .
Carefully praise the pack open with a stanely knife , you can also add an extra cell inside that 6 volt packto make it 7.2 , theres room inside the case.
Then just buy a modern charger , if you use the 8000 mah cells you will basically need to fastcharge it at 8amps for one hour , but thas a bit high , 4amps for 2 hours will be better and so on, but most chargers these days will justcut off when fully charged.

[DJTheo]

The problem with D-cells is that most chargers are made for C-cells and since with D ones even at 4A more then 2h would be needed, they may time out as they often have a timer for the case the peak detection doesn't work.
Cheers

[santiaglo]

thanks for the tips guys, I shall be getting one of those ni-mh 3000ah as they seem to be quite good. yesterday out of curiousity i tried a 9.6v 8cell AA pack from my youngest sons silverado, although it didn't last very long my bruiser certainly went well for the first 5-6mins. wonder what 2 2500ah AA packs joined for 5000ah would be like[?] Has anyone any here ever tried it[?] or is it not worth the bother.

chris[:o)]

[Floyd]

Rite now Im useing the Orion Super Duty plus 3000mah NI-MH packs in my Moutaineer ( same thing as the Bruiser ) . My locol hobby shop sells a pack of two for $45 . Plus with the NI-MH batteries you have to keep in mind that not all chargers are made for the Ni-MH batteries and could , errrr , will cause you probloms if you try to use a normal NiCD charger . Though there are a lot of chargers to choose from that handle both NiCD and Ni-MH at reasonable prices ...

[DJTheo]

9.6V is too high for the motor and the transmission. You can join packs to double the capacity, but better charge them seperately, as cells usually aren't perfectly matched.
Cheers