Hi Guy's, I would like to know what you all think, Is running a 6v a lot or only marginaly better than 4.8v?? I have been running 6 volts because of the extra torque it gives the servos plus I have been told they are better safety wise as if you lose a cell the plane will still fly on the 4.8 volts that remain.

Problem is I bought 2 Hitec 645 MG servos but when set up on 6v tended to twitch and after asking those who should know was advised that Hitec don't recommend them for 6v, something to do with the pick up feed wire??

These servos still have heaps of torque at 4.8 volts which is plenty for the plane I'm building (Cmpro Eagle) but not sure if going back to a 4.8 v system is a good move or not.
I have to say that my first large plane (Pacific Gee Bee) was only set up on 4.8 v without any apparent problems although it is only a fairly easy, non aerobatic plane that doesn't put too much load on the servos.

Any input from you guy's would be very much appreciated

Rgds,
Rod.

I've got some planes, and boats, with 6v and others with 4.8v. I have yet to be able to tell the difference when I'm running them. My rule of thumb for battery selection is if I've got something that's large or quick, I use the 6v packs. For sport applications, I use 4.8v.

I do notice the difference.. I run 6V and those hitecs run fine on 6.0v

it is common for servos to twitch a bit on a new fresh charge due to the voltage, but once you move them around a bit, it goes away...

I run 6 volts because a had a partically charged 4.8 pack that would drop below the low battery level during snaps. The throttle would go to idle and scare me to death. I went to 6v packs and never looked back

I have used this product on my bigger planes...

http://www.electrodynam.com/cgi-loca...db5+1150383584

Check it out. It works well for larger planes where two battery packs weight is not an issue.

CJ

Loupus,
You big beautiful Son-of-B#$%&. I may not know if going to 4.8v is better for you, but you just solved my elusive mystery. I have been running Hitec 645MG on 6v and didn't know where the twitching was coming from. No one could figure it out. I really don't need the extra torque so I'm going to switch out the 6 and go to 4.8v and run a test. THANK YOU!!!!!

George

I run 6V metal hydrides on everything. The 6V MH batteries are just as light as a 4.8V nicd pack--if not lighter.

I DO notice the speed difference in the servos.

In theory--a 6V pack is adding 25% more torque and speed.

They do run down faster than 4.8V systems--so keep an eye on them.

A MH battery does not have the gradual discharge curve that a nicd will have.

In my experience--using the cycler--when a nicd battery gets down to 6.1V or 6.0V--they will hold it and then fall off slowly untill they reach about 5.6V--then they drop quick.

A MH battery will hold it's power for a longer period of time---up front. They will hold 6.2---6.0V for a LONG time. But when they hit 5.9V--they drop like a rock. FAST!!!

Keep your eyes on those MH batteries.

I usually hit them with the field charger when they get down to 6.0V or 6.1V

Let me put it this way. True pimps run 6 volts.

I have run 6V on my 645MG's for awhile with no side effects... They do twitch as mentioned when off a fresh charge but that quickly goes away---

Why settle for 106 when you can get faster 133 oz @6V?

I'v been running a 4.8v pack's on my profiles and would like to go to 6v's. My question is can I still use my normal wall charger that I use for my 4.8v packs or do I need something better? Also can I use a 6v pack on standard BB servos? Thanks

I have 645s on 6 volt systems with no problems. I use 4.8 on trainers and other non aerobatic planes but run 6 volt only on aerobatic planes.

Yes, and yes. I suggest checking out Red's R/C Battery clinic for more information. http://www.rcbatteryclinic.com/

Edit: when I started using 5 cell receiver packs, I finally broke down and spent the money on an Accucycle Elite. One of the best purchases I've made in a long time. Works great!

Me too. I like this charger a lot for my MH batteries. It will cycle them--trickel--or peak charge. A great charger for the money.

I also just recently purchased the Triton charger for at the field. A great field charger for the money. It will charge every battery you got. It will charge your 12V flight box battery--your nicds, the MH's, your li-po---------it will do it all.

Guys the reason your servos twitch after a fresh charge on a 6V battery is because the initial voltage after the charge is usually over 7 volts and this extra voltage causes the servos to twitch. Once you turn the radio on and start using some current when the volgage drops below 7Vs then the twitching goes away. What you do with a 6V battery is to get a voltage regulator (inexpensive, I think I paid 7.99 for mine), which plugs in between the switch harness and the receiver. The regulator keeps the current constant, no more twitching no matter what the charge and you get all the benefits of 6Vs!