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Thunder Tiger Raptors 30-90 - Imperio > RAPTOR 30 Is 2700ma JR pack enough?
 
 
Helisonmymind
Senior Heliman
Location: Toronto, Canada

Hey guys,

I got a 2700ma JR pack with my used Rappy. Should I swap out for a 6V 4300 or so? My servos aren't the best DS821/810G and they may work a bit better at 6V. Basic sport flying, no 3D. What do you think?

Do I need an LED bar volt meter for the bird?


http://www.voltmagic.com/faqs.htm

BTW, I had a Lipo fire, so I'm a little gun shy of lithium-based power at the momment!

Cheers

Anything worth doing's worth overdoing.
05-21-2008 01:12 AM
 
 
dhollein
Key Veteran
Location: Tucson, AZ

Should be okay but I prefer more, especially with any digital servos. After using 6.0v systems, I'm very reluctant to go back to 4.8v due to the sheer lack of performance with 4.8
05-21-2008 01:31 AM
HOMEPAGE  
 
 
Helisonmymind
Senior Heliman
Location: Toronto, Canada

how noticeable is the 1.2V difference for hovering a basic sport flying? Does it feel a bit more sluggish? The 4.8V Sub-C pack is pretty bulky as it is. Does anyone run a 6V sub-c pack?

Thanks guys

Anything worth doing's worth overdoing.
05-21-2008 07:13 PM
 
 
dhollein
Key Veteran
Location: Tucson, AZ

It's a big enough difference the I won't switch back... .Honestly the whole aircraft is more responsive across the board so it's worth it in my opinion even if you are only doing basic or sport flying
05-21-2008 07:15 PM
HOMEPAGE  
 
 
Helisonmymind
Senior Heliman
Location: Toronto, Canada

thanks dhollein. Are you running a 6V sub-c pack? Any probs with the size/weight of pack?

Cheers

Anything worth doing's worth overdoing.
05-21-2008 08:11 PM
 
 
TankDirt
Veteran
Location: illinois

I would just switch to 6V and stay there if I were you..You dont need a lipo to have 6V..I would recommend a fromeco 2600mah li-ion pack,thats what I and many many others use And have never had any trouble with them..You dont need to worry about fires with this pack either,And they hold their voltage under a load great..So just get one of those and a regulator(or BEC) and your set with no worries..
05-21-2008 10:46 PM
 
 
Helisonmymind
Senior Heliman
Location: Toronto, Canada

sounds good to me. I found this BEC:

http://www.castlecreations.com/products/cc_bec.html#

or http://www.deeteeenterprises.com/NS...0.BEC.3.Amp.php

or

http://www.align.com.tw/shop/produc...roducts_id=2273

Who makes a good regulator (no BEC?) or is one of the above a good way to go?

Thanks!

Anything worth doing's worth overdoing.
05-22-2008 12:16 AM
 
 
Helisonmymind
Senior Heliman
Location: Toronto, Canada

Lithium is scary stuff. I'm sure you guys have seen this pic before...

Hmmm, I uploaded a picture of a crispy nitro heli, RR says it's "fastphoto processing" or something and it didn't include the picture. I'm just trying to insert a pic, not add it to my gallery, I don't see what I can't seem to do this. Sometimes they upload, sometimes they have to be processed? Oh well I'll try again later...


Old school, vintage, legacy NiHM is fine by me when it comes to safety.

Cheers

Anything worth doing's worth overdoing.
05-22-2008 12:33 AM
 
 
dhollein
Key Veteran
Location: Tucson, AZ

I'm using the Fromeco 2400 lipo with reg and no problems I use them on my airplanes as well
05-22-2008 12:34 AM
HOMEPAGE  
 
 
rexxigpilot
Senior Heliman
Location: florida

Helisonmymind,

Your 2700mAH pack is certainly adequate! I use a 1500 mAH on a Raptor 50 with similar servos. However, if you have a concern about LiPo's, get yourself a 2300mAH A123 pack (6.6 nominal volts). That will wake up your servos, eliminate the need for a regulator and eliminate the fire/explosion issue.
05-22-2008 12:43 AM
 
 
Helisonmymind
Senior Heliman
Location: Toronto, Canada

rexxigpilot,

How many flights do you get out of your 1500?

Thanks

Anything worth doing's worth overdoing.
05-22-2008 02:00 AM
 
 
TankDirt
Veteran
Location: illinois

I woud stay away from un-regulated systems with spectrum period...

You are spectrum right?
05-22-2008 03:02 PM
 
 
Helisonmymind
Senior Heliman
Location: Toronto, Canada

yes, spektrum DX7 and 7000 receiver. I'm trying to finish my heli today. Will the unregulated 4.8V JR pack be a problem?

What should I buy? I'm going to my hobby shop today.

Thanks!

Anything worth doing's worth overdoing.
05-22-2008 04:52 PM
 
 
TankDirt
Veteran
Location: illinois

I wouldnt do it If your running spectrum..Go with a regulated system! or a BEC their almost the same thing anyways..If your worried about fires just go with the fromeco packs,2600 fromco pack will give you 4-6 "balls out" flights,And if your just sport flying it should give you even more than that...If you do decide to go with the un-regulated route make sure you get big cells because they drop less in voltage as you put more of a load on them...The CC BEC would be fine and both of the align regulators would be fine as well,Make sure if you buy the align regulator that doesnt have the glo igniter,to hot glue the wires in place so that they dont vibrate and break off!
05-22-2008 05:05 PM
 
 
Helisonmymind
Senior Heliman
Location: Toronto, Canada

thanks Tankdirt.

The Spektrum is a stopgap till I get my JR 9303 config'd. I think I'm going to stick with my JR 2700ma pack. I hear what you're saying and I hope low voltage doesn't come along and bite me in the @ss with my Spektrum!

I've always wondered if an AA-sized 2700ma is the same as a Sub-C 2700. Isn't mA mA? I tend to agree with you, a C-sized pack seems far more substantial than an AA size doesn't it? It's tempting to build up a smaller AA 2700 6V pack, but if the 4.8V works okay, I'll use it for a bit and see how it goes.

This Raptor was purchased, slapped together, and never flown, then passed onto me for $630 including starter, pump, panel etc. I'm going over the whole thing, rebuilding it and seeing what I can make of it. It's my backup heli but is really growing on me. I can't wait to fly her today or tomorrow!

Anything worth doing's worth overdoing.
05-22-2008 06:12 PM
 
 
TankDirt
Veteran
Location: illinois

good luck! it should be fine as long as it is a sub C pack,If it was included with the rappy when You got it you should discharge and recharge it a few times before you take it to the skys...
05-23-2008 06:36 AM
 
 
Helisonmymind
Senior Heliman
Location: Toronto, Canada

Tank,

I drained my 2700 by leaving it plugged into heli, charged it and only got 1050ma into it. Maybe it needs more cycling? I hope the pack is okay...

I took the rappy out and flew it yesterday using the JR 1500 and IMO, that pack just doesn't have enough juice for the amount of flying I want to do in a day. I got about 4 tanks in and my voltage meter was on its 4th bar, just under the orange warning led. Called it quits for the day since it was getting dark, I was getting tired, and well, the R30 was still in one piece!

Update:

I could only put back 470ma into my 1500 pack. Does that mean I could have gotten another 500ma or so without really pushing the pack? That's another 4 tanks or more...

Anything worth doing's worth overdoing.
05-24-2008 12:38 PM
 
 
Helisonmymind
Senior Heliman
Location: Toronto, Canada

two more high cap receiver packs

Have you guys seen this? Talk about some crazy current!

4000mA, not too shabby



http://www.horizonhobby.com/Product...ProdID=JRPB6001

or this one:

Thunder Power RC Receiver Pack 3400mAh 7.4V 2 Cell Li Poly 2s3400 Lithium Battery


http://www.rctoys.com/rc-toys-and-p...LY-BATTERY.html

But I'm getting side tracked again with LiPo. My wife is paranoid with me charing ANYTHING in the house (had pretty bad fire 3 weeks ago, forced us into a hotel for 1 week) even when I explain how safe my NiMH packs are.


okay, one more:

this pack uses 4/3A size cells and is 6oz. Not too bad for 4500ma and 6V.

http://www.jrradios.com/Products/De...ProdID=JRPB5009
Receiver Pack 4500mAh 6V NiMH Sanyo
Heavy-duty universal connector
Huge capacity in a "4/3A" cell size
Sanyo 6.0V 4500mAh NiMH

Anything worth doing's worth overdoing.
05-24-2008 01:37 PM
 
 
TankDirtVeteran - Location: illinois -
For those prices you can just about buy a regualator and fromeco 2600 pack..IM going to stress that the li-ion batteries(fromeco) prabably best for your situation,They will give you simular performance as lipos,they wont start a fire(although you never know,always keep an eye on batts as they are charging) but ive never ever heard of a fromeco battery fire,and did I mention they are cheap? only like 30 bucks a pack,but you need a regulator or BEC...if your on a budget go with the CC BEC,those seem to work great..or you can buy the new align 2 in 1 without the battery and then buy the fromeco pack for it,Thats what I run in my 600...
05-24-2008 03:42 PM
 
 
Helisonmymind
Senior Heliman
Location: Toronto, Canada

using my JR 1500 pack for now...

since I can't seem to get more than about 1050mA into the 2700.

I got three tanks through the OS 37, and my Novatech LED voltage indicator was lighting 5~6 green LEDs. One more green segment to go until the warning yellow came up so I shut her down.

Got home and charged the JR 1500 and put 450mA into it. Does this mean I had a ways to go before the 1500 got marginal?

I'm charging using a Piranha Digital Peak charger and it doesn't have a discharge feature so I'm not sure how to verify its capacity...

Anything worth doing's worth overdoing.
05-26-2008 03:43 AM
 
 
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Thunder Tiger Raptors 30-90 - Imperio > RAPTOR 30 Is 2700ma JR pack enough?
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