The 3DRCForums -Discuss Anything Thread-

[zmonster97]

I had one when I was flying 8S and it really did the trick but to do so you really need a 24v power supply.

Me and my dad are working on making one! But he doesn't understand why it needs a 24v power supply. His reasoning is that with it maxed out, it needs about 756 watts. (30a x 25.2v for a fully charged 6s battery) And a dps-600pb (I think) putts out 575 watts on 12v. So he thinks I should just use the 575 watts and not worry about 24v and the few extra amps I could get out of it when charging 6s lipos. I keep telling him that everyone uses 24v on these chargers and stuff but he doesn't see the point. I don't know.

We'll finish the power supply eventually. I guess until then I'll have to use my 12v 15a power supply.

 

[ryan_m]

on 12v input you are only going to make about 500 watts (give or take), plus the charger will work a bit harder doing it. But it will work fine if that is all you need.
I ran a 208b on a 13.8v supply for a while, rated at 350 watt charger, but on 15v it would only make about 280.

 

[Ohio AV8TOR]

Me and my dad are working on making one! But he doesn't understand why it needs a 24v power supply. His reasoning is that with it maxed out, it needs about 756 watts. (30a x 25.2v for a fully charged 6s battery) And a dps-600pb (I think) putts out 575 watts on 12v. So he thinks I should just use the 575 watts and not worry about 24v and the few extra amps I could get out of it when charging 6s lipos. I keep telling him that everyone uses 24v on these chargers and stuff but he doesn't see the point. I don't know.

We'll finish the power supply eventually. I guess until then I'll have to use my 12v 15a power supply.

A single will run it but you won't be able to charge at 30A for parallel charging which is the blessing of having a large charge capacity.

Yes 756w is required but now you need to find the charger input to do so for 30A. Power supplies are basically 80% efficient so
Watts (ps) = Watts (out)/.8
Watts (ps) = 756W / .8 = 945W Sorry but that is the reality. You have roughly 596W at 12V and 24V basically doubles that.

The math is here

Convert a DPS-600PB for 12V here

To go 24V with two DPS-600PB's here
Lots of it on RCG if you need more help.

 

[-DJO]

[video=youtube;ReHqM6GPCSg]http://www.youtube.com/watch?v=ReHqM6GPCSg[/video]

Check it out! You don't have to watch the whole thing. Maiden soon!



Dan

 

[zmonster97]

on 12v input you are only going to make about 500 watts (give or take), plus the charger will work a bit harder doing it. But it will work fine if that is all you need.
I ran a 208b on a 13.8v supply for a while, rated at 350 watt charger, but on 15v it would only make about 280.

A single will run it but you won't be able to charge at 30A for parallel charging which is the blessing of having a large charge capacity.

Yes 756w is required but now you need to find the charger input to do so for 30A. Power supplies are basically 80% efficient so
Watts (ps) = Watts (out)/.8
Watts (ps) = 756W / .8 = 945W Sorry but that is the reality. You have roughly 596W at 12V and 24V basically doubles that.

The math is here

Convert a DPS-600PB for 12V here

To go 24V with two DPS-600PB's here
Lots of it on RCG if you need more help.

Yeah, I pretty much know that I need to go 24v to get the most out of it, but maybe I'll pass along this information to him. Thanks!

 

[njswede]

Gotta love Linda's Hobby Hut in Pompton Plains, NJ! She's not a sponsor of the site or anything like that. but she deserves a honorary mention tonight! It's so rare to walk into a hobby store that 1) has stuff in stock, 2) has staff who know what they're talking about and 3) doesn't have rotten attitude. Go Linda!!!

 

[G.P.]

Heli guys - due to losing a few flying spots, I'm thinking about giving helis another try. Last time I tried a Trex 450, but found it a little twitchy and too small to see. I'd like to maybe try something bigger and I would like to use my 4s 4000 packs. Anybody know of a heli and set up that could use those packs?

 

[Anthony7820]

Heli guys - due to losing a few flying spots, I'm thinking about giving helis another try. Last time I tried a Trex 450, but found it a little twitchy and too small to see. I'd like to maybe try something bigger and I would like to use my 4s 4000 packs. Anybody know of a heli and set up that could use those packs?

That's tricky... Usually:
450=3s
500=6s
550=6s
600=12s
700=12s or 14s

I guess you could run the 500 on a 4s pack. It wouldn't have TONS of power, but I'm sure it would be enough...

Tada...Protos 500 calls for a 4s 3700mah or a 6s 2500mah. Sounds like a perfect match

http://helidirect.com/msh-protos-50...h-60a-esc-sab-425mm-carbon-blades-p-22651.hdx

 

[quadracer]

Some fly 550's on 8S, but two 4000's is pretty damn heavy...

 

[ryan_m]

Heli guys - due to losing a few flying spots, I'm thinking about giving helis another try. Last time I tried a Trex 450, but found it a little twitchy and too small to see. I'd like to maybe try something bigger and I would like to use my 4s 4000 packs. Anybody know of a heli and set up that could use those packs?

a 500 class heli could do it with the right motor.
Normally something like a trex 500/protos 500 (I've had both) run a 6s2650, which is about the same weight/flight time/watt hours as a 4s4000. Your amps will be higher though and for full on 3d flying you may wish you had a 6s setup instead.
The trick would be to find the right kv motor/pinion combo to get the proper headspeed.

By the way - having had a trex450 and trex500, you will really really like a 500 class heli. I agree, 450's are twitchy and small. The 500's are a heck of a lot more stable and present much better in the air as well.