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

[White, Chris]

Hi Matt,

Thanks very much for your response....!

 

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: Thursday, June 15, 2006 5:40 PM
To: nsrca-discussion at lists.nsrca.org
Subject: Re: [NSRCA-discussion] JR and un-regulated 6V

 

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

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