Reciever Pack Question

[Nevaren]

for those running savages what's the Rating of your RX pack. Also, has anyone tried running 2 RX packs in Parallel to bump up the available current?

My 1100 pack seems a bit weak to turn the wheels on my heavy aluminum beast.

 

[FastEddy]

7.2v should be all you need. I wont recommend any more then that.
Check to see if your pack is receiving a full charge. Its possible you have a bad cell in the pack. 2 packs will give you 14.4v this is asking for disaster.

If you need more then 1100 for better run times then there is something eating your current up. It should last you several hours of continues use.

V= power
Milliamps = runtime

 

[vbgagnon]

Ed if they are run parallel then it will still be at 6-7.2 volts. If you were to run them in series then you would be up to 14.4 volts. What will change is the MAH rating. If you are running two 1100 mah packs you will have a total of 2200mah. Longer lasting with a tad more punch.

Nevaren I dont' think that it will give you much more juice to turn you wheels I think if you want that you are going to have to get a servo with more torque. You will be able to run double the time, but I don't think it will give you more power.

 

[Nevaren]

Ed, VB,

ty for the input.
currently running a JR Hi Torqe MG steering servo. I also tried a HI Tec 645MG.
I will look at voltages etc. to check for bad cells.
**now where did it put that multi-meter**

 

[niggle]

for those running savages what's the Rating of your RX pack. Also, has anyone tried running 2 RX packs in Parallel to bump up the available current?

My 1100 pack seems a bit weak to turn the wheels on my heavy aluminum beast.

I don't run a Savage but I do run a HS645MG steering servo in my buggy.

I built my own 1800mAH Rx packs using 5 x AA NiMH cells. They weigh around 25g more than an off-the-shelf 1100/1200 pack and have no problems moving the steering on my buggy.

Nowadays you can get 2500mAH AA cells and 5 of these would be more convenient than 10 x 1100mAH cells.

 

[niggle]

Nevaren I dont' think that it will give you much more juice to turn you wheels I think if you want that you are going to have to get a servo with more torque. You will be able to run double the time, but I don't think it will give you more power.

The new, larger capacity cells can deliver much more current and current equates to torque in a servo.

I recently replaced the 1700mAH NiCd sub-C cell in my glow starter with one of the latest 3700mAH Sanyo NiMH cells. I had no idea that a cold glow plug could glow so brightly, hardly surprising when you consider that Team Orion have measured this cell dumping 30A @ 0.85V.

 

[FastEddy]

Most RX packs used are 5 2/3AA configuration. 2/3s at this point are available up to 1200 or so. AA on the other hand are available to 2800 and above. The issue here is the space to mount them without making mods. Sure the 2800 packs will last longer and thats a good thing but honestly, an 1100 for a receiver pack should last many hours of continueious use. If they don't, there are issues to look at.

 

[beason]

yea my 1100 will last almost all day of running.. and thats almost back to back tanks.. and 5-6 hours.. make sure you have a good charger for them it helps alot!!! since were on the subject.. the buggy I'm buying has one of your battery packs in it eddy.. could you pm me (or post here) the detals of this?? also what plug is on it.. mah rating etc.. (its one you sold to vbgagnon)

 

[psunitro]

1100 packs MAY last for hours, and my not depending on the servos. Digitals draw MUCH more out of the pack,having more capacity is always a good thing. The 645 is a good servo,but you may need more than what it puts out. Which JR do you have? if its the 590, they dont have enough to pull those big wheels around in a hurry. and since it is now heavy b/c of the al., it makes matters worse. If your pack is ok, and your not false peaking or something it may be a weak servo for your use. You could try a Air 358, hitec 945mg,or if you want to stay JR the DS8550, or the 615.

Here is a chart its not up to date, but it has a LOT.
http://www.fatlion.com/sailplanes/servochart.html