brushless 1/5 4wd conversion about to begin! couple questions.

[redshift]

Originally Posted by lutach

I thought this new big high torque servos were meant for 2S lipos.

Like those $200 JR hi-volt servos?

I'm sure they are well worth it, but most RXs still won't support over 6V to my knowledge- so that makes it a problem.

James, most any brushless fan will be fine up to about 75% over spec'd volts. And wow do they work. Buddy of mine has 2 2" BB fans rated 12V, run on 16.8 normally, and have been run at 25V, no issues. I have 2 1" Novak fans rated at 5V, running 8.4 for over 3 years. No worries!

[lutach]

Originally Posted by redshift

Like those $200 JR hi-volt servos?

I'm sure they are well worth it, but most RXs still won't support over 6V to my knowledge- so that makes it a problem.

James, most any brushless fan will be fine up to about 75% over spec'd volts. And wow do they work. Buddy of mine has 2 2" BB fans rated 12V, run on 16.8 normally, and have been run at 25V, no issues. I have 2 1" Novak fans rated at 5V, running 8.4 for over 3 years. No worries!

I think the Spektrum Rxs can handle up to 9V

[redshift]

Originally Posted by lutach

I think the Spektrum Rxs can handle up to 9V

Now that you mention.. yeah I think it was 9.6 even, but what about the Futaba owner who tries to use one of the JR servos at 8.4.......

Originally Posted by redshift

Now that you mention.. yeah I think it was 9.6 even, but what about the Futaba owner who tries to use one of the JR servos at 8.4.......

he buys spectrum rx's shortly after

[Ryu James]

so i went and picked up the castle bec pro good for up to 12s and 20 amps, which is very high amps for bec i am told. anyway, all my fans are 6v. i do have 12v fans too but currently my build makes use of 6v fans. my servos are the hpi sfl-30mg 1/5 size for steering and for brake i have available a futaba s9157 and a jr9100hvt. the jr is capable of using 7.4v input but the steering servo can only go up to 6v so i will probabaly use the fut s9157 as it is rated at 425oz at 6v and the jr is 403oz at 6v.

is it possible to run 7.4v to one servo and just 6v to the other?

[_paralyzed_]

Originally Posted by lutach

I think the Spektrum Rxs can handle up to 9V

Originally Posted by redshift

Now that you mention.. yeah I think it was 9.6 even, but what about the Futaba owner who tries to use one of the JR servos at 8.4.......

Originally Posted by Ryu James

so i went and picked up the castle bec pro good for up to 12s and 20 amps, which is very high amps for bec i am told. anyway, all my fans are 6v. i do have 12v fans too but currently my build makes use of 6v fans. my servos are the hpi sfl-30mg 1/5 size for steering and for brake i have available a futaba s9157 and a jr9100hvt. the jr is capable of using 7.4v input but the steering servo can only go up to 6v so i will probabaly use the fut s9157 as it is rated at 425oz at 6v and the jr is 403oz at 6v.

is it possible to run 7.4v to one servo and just 6v to the other?

The HV servos were born from the rock crawler crowd, and they generally power the servo directly off a 2s lipo pack and use a BEC to give 6v to the rest of the electronics.

So, if you run a 2s receiver pack you could power your HV servo and then use your new BEC to power everything else. (BEC paralleled to the HV servo off the 2s)

To directly power the HV servo just run the + and -of the receiver plug directly to thhe 2s pack. Run the third wire (the signal wire) in the receiver plug to the receiver like normal.

[KaztheMinotaur]

I'm still hanging in there. I got a new to me truck last week so I've been busy with that.

I got my battery mounting plates mounted last night. I need a tap to make holes in my new motor mount plate. I should have time this weekend since that wife and kids are going back home to visit her uncle.

[Ryu James]

hey all,
so i am going to be using the castle bec to power the esc and reciever. but i have a small 2s 1350mah lipo that i want to use strictly for my 6v fans. how would i hook this up? do i just connect the batter directly to the fans? or maybe connect to a switch harness and then the fans? or do i need some type of resistor or something like with led's?