VFC Scar on LiPoly

[Salty6924]

My experience with VFC AEGs is nothing short of aw-inspiring madness.

 

A weapon that fires so effortlessly, while maintaining the Tightest grouping and longest range of any AEG i have ever used. Together with the best Cosmetics, all for a bit more then a classic army.

 

I am in heaven and will NEVER buy another Brand of AEG again, unless i plan on replacing all the internals...i cant live without the consitency of a VFC.

 

heres my question, A VFC Scar-L takes a 9.6v Mini standard. But i want to Use a 1500MAH Lipoly 11.1v Mini, to get the extra 3000 Rounds out of the battery. its like hacing a 2600mah MINI!. I really dont care about the ROF as VFC ROF on a 9.6 is awsome to begin with, I want to know if this will be very bad for the weapon, all my airsoft techie senses point to yes. if i could find a 9.6 Lipoly Mini i would get it in a hearbeat and be done with this foolishness.

 

Please help

 

thanks

[Xaccers]

Considering you can get 1400mAh NiMH for next to nothing, if you're planning on a lipol that pathetic I wouldn't bother.

You can't fast charge lipols (although at only 1500mAh it's not going to take that long to charge) like you can NiMH.

You'll need a new charger.

If you get a low powered one (when I say the 1500mAh one is pathetic, I'm assuming a 10C discharge rate which many low capacity ones have) it's risky because your gun can draw more current than the battery can safely provide (15A for a 10C 1500mAh)

 

11.1v lipols having 3 cells are normally considerably thicker than mini batteries, even if you re-assemble them without the spacers.

 

I run my G36 off a 7.4v 2500mAh 25C lipol and have a rate of fire on a par with 9.6v

[Salty6924]

So would you say that that Lipo you use in your G36 is worth it or should i just go with the "Firestick".

 

also a link to that lipo would be nice

 

thanks

[greg]

I'd follow Xacs advice about lipos, he was really helpful when I raised the question a few months ago. (search 'why don't we use lipo')

 

Currently, I shoehorned a 7.4v 800mah into an mp7: Similar results to an externally mounted 8.4v mini, only the gun fits in the holster. & a 11.1v 2500mah which is giving a slightly better rate of fire than a 10.8v 3300mah g&p, only 1/3rd the weight!! Both of these batteries are the 'flight power' brand, favoured by the UK's 3d rc model heli flyers.

 

The obvious size/weight/power/capacity advantages of lipos are appealing.

 

You must have a lipo compatible charger. & depending on the cell, it wont last long, if you totally discharge it. So you have to work out how many shots you can fire from fully charged, to say 20 or 30% charged & stick to that.

 

I'm sure some one will be able to explain that better than I can, but that's the basics.

 

I'm glad I made the move, in these two specific guns, the lipos have worked out well. My charger was already lipo compatible & some good friends have helped me to understand the charging routine. The batteries in this case are top quality & were actually cheaper than the NiMah's that I have compared them to.

 

Now if I can just find one to fit a p90 & give better performance than a 9.6v 2000mah............................

 

 

Greg.

[Salty6924]

http://www.rcworldofplanes.net/prodView.asp?idProduct=1113 This is the Battery

 

http://rcworldofplanes.net/prodView.asp?idproduct=499 This is the charger.

 

Is that good, Will it fit in my VFC scar.

 

7.4v Lipo @ 2500mAh, Thats like a 9.6v @ 3000 NiMh Right?

 

Btw, thanks for the help guys.

[Xaccers]

<a href="http://www.rcworldofplanes.net/prodView.asp?idProduct=1113" target="_blank">http://www.rcworldofplanes.net/prodView.asp?idProduct=1113</a> This is the Battery

 

<a href="http://rcworldofplanes.net/prodView.asp?idproduct=499" target="_blank">http://rcworldofplanes.net/prodView.asp?idproduct=499</a> This is the charger.

 

Is that good, Will it fit in my VFC scar.

 

7.4v Lipo @ 2500mAh, Thats like a 9.6v @ 3000 NiMh Right?

 

Btw, thanks for the help guys.

 

 

Looks like a good battery

Charger should do the job, but I'd try to get one that's more automatic.

Here's a link to mine, it can run off the mains as well as a 12v supply

http://www.hobbypeople.net/gallery/158371.asp

 

To compare performance of batteries you need to do the following:

Find the discharge rate of the battery (25C in this case) and multiply it by the capacity in amps (2.5Ah) giving a continous current of 62.5A (DO NOT STICK THE BATTERY ON YOUR TONGUE!)

 

That's the maximum safe current that the battery can handle being drawn from it continuously, for a short period (normally 10 seconds) it can cope with maybe 10C higher, check the burst rate.

 

Now, we want to know how much power that is, so we multiply the potential difference of the battery (7.4v) by the current (62.5A) giving us 462.5W (nearly half a kiloWatt!)

 

Do the same with other batteries and compare the Watts.

 

Now, NiMH tend to have lower discharge rates, like 10C or 15C, so if we pick 15C and run that against your 3000mAh 9.6v we end up with:

Max current: 15x3=45A

Watts: 9.6x45=432W

 

So a 7.4v 2500 25C lipol should give a slightly higher rate of fire than a 9.6v 3000mAh 15C NiMH.

 

Another advantage of running on 7.4v rather than 11.1v (other than you don't strip pistons/gears so often) comes into play when you consider lipol cells shouldn't be run down below 3v each.

A 2 cell 7.4v therefore can be run down to 6v safely.

I'd be suprised if your gun is actually able to shoot much below 7v, so basically, when your gun gets slow, battery needs charging but is well above the minimum voltage per cell, so no need to worry about damaging the cells.

With a 3cell 11.1v, at 3v per cell, it's still running at 9v, which guns can fire at, so you could end up running it down below 3v.

[Sale]

Excellent stuff, a big hat off to Xaccers!

 

Now to look for a suitable battery to fit inside an AR-15 buffer tube.

 

Oh and on the topic: While VFC internals are high quality, I still wouldn't treat them carelessly.

 

-Sale

[-Dan-]

i have two of the above batteries in 11.1v there excellent, ones 2500mah and the other is 1200mah, they both give equal performance but the 2500mah obviously lasts longer. Tho in an average days skirmish i struggle to drain the 1200mah battery.

i thinking of getting a 14.8v lipo and seeing how far i can push my hs G3, if i do it i'll post a video.

[Salty6924]

Man you are the Lipo Guru huh, So on 7.4 the ROF would be comparable to a 9.6v batt

correct? if so im sold.

[Leatherneck]

Pretty old thread, but did you ever go with the 7.4v Lipo 2500mah battery? And how did it fit in the VFC SCAR's stock?