[NSRCA-discussion] JR and un-regulated 6V

[Rcmaster199 at aol.com]

Sure Chris, 

I have spoken about Radical RC before on this forum. That's where I purchased 
mine. Very inexpensive packs BTW. Regarding low resistance, they probably do 
have lower resistance than the earlier 4 cell NiMH purchased from them several 
years earlier

About 5 years ago, on Earl Haury's suggestion, I bought the 4 cell 1650's and 
liked the response. BUT, flight times improved only marginally from the 
original NiCd 1400 JR pack. Maybe one more flight. Over the past 4+ seasons, since 
2002, it was the only pack I had in service (2 airplanes). It started to show 
signs of wear though as response time started lagging more and more. I decided 
to change to the 5 cell earlier this year with much improvement

The longer flight time was unexpected I must admit. I figured whatever time 
gain I made in voltage-speed equation I would lose in current-torque. Not so! 

I don't know for a fact that these are better, lower R cells, they are after 
all Sanyo's. My airborne set-up is unchanged from earlier in Temptress; same 
servos and linkages. Servos have routinely been serviced so I can't say where 
one set of pots worked better than another. It could be that the cells are more 
closely matched. That's what DinoP thinks anyway.

Hope that helps. BTW, lower R cells are definitely the way to go with NiMH. 
Lag time can be noticeable with standard cells and is very annoying. Been 
wanting to go to LiPo airbornes for that reason. Eddie Alt built me a very nice 
settable switch/regulator and I have the set-up ready to go. I set mine at 6.5 
volts, just perfect for JR airborne rigs

Matt





In a message dated 6/15/2006 8:56:50 AM Eastern Standard Time, 
chris at ssd.fsi.com writes:
Hi Matt,
Are you using low-impedence nimh packs?   Would you divulge your battery 
source?
 
Thanks, Chris
 



From: nsrca-discussion-bounces at lists.nsrca.org 
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of rcmaster199 at aol.com
Sent: Wednesday, June 14, 2006 5:03 PM
To: nsrca-discussion at lists.nsrca.org
Subject: Re: [NSRCA-discussion] JR and un-regulated 6V
 
I am doing that with NO problems. Fast charged on the way to field most of 
the time, with a Serius fast charger. In my set-up, a 1650ma NiMH lasts about 3 
flights longer than a 4 cell pack of equivalent capacity. Equivalent ending 
cell voltages of 1.20v unloaded (1.15V loaded with 1000 ma draw) for either 
battery. 
 
Getting greater torque and speed as well as longer flight time. Best all 
around
 
MattK

-----Original Message-----
From: Gene Maurice <gene.maurice at comcast.net>
To: 'NSRCA Mailing List' <nsrca-discussion at lists.nsrca.org>
Sent: Wed, 14 Jun 2006 15:36:18 -0500
Subject: [NSRCA-discussion] JR and un-regulated 6V
Anyone aware of any issues running unregulated 6v Nimh pack with JR Digital
servos??  
 
 
 
Gene Maurice
mailto:gene.maurice%40comcast.net
Plano, TX
AMA 3408, NSRCA 877
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.nsrca.org/pipermail/nsrca-discussion/attachments/20060615/1ffcd122/attachment-0001.html