[NSRCA-discussion] Main battery redundant lead for receiver
Phil S.
chuenkan at comcast.net
Thu Jan 26 06:27:42 AKST 2012
I thought Moonshine WAS a fossil fuel...Sent from Oak Ridge, Tennessee,
the home of radioactive fossil fuel. Talk about Glow Power!!!
On 1/25/2012 8:57 PM, Keith Hoard wrote:
> Is Moonshine made from fossil fuels?
>
> Keith Hoard
> Collierville, TN
> khoard at gmail.com <mailto:khoard at gmail.com>
>
>
>
>
> On Wed, Jan 25, 2012 at 7:00 PM, trexlesh at msn.com
> <mailto:trexlesh at msn.com> <trexlesh at msn.com <mailto:trexlesh at msn.com>>
> wrote:
>
> Ya fossil burner! :-)
>
> R
>
> Sent from my Verizon Wireless Phone
>
> ----- Reply message -----
> From: "astropuppy" <astropuppy at gmail.com
> <mailto:astropuppy at gmail.com>>
> To: "General pattern discussion" <nsrca-discussion at lists.nsrca.org
> <mailto:nsrca-discussion at lists.nsrca.org>>
> Subject: [NSRCA-discussion] Main battery redundant lead for receiver
> Date: Wed, Jan 25, 2012 12:47 pm
>
>
> You know you want to go E Jim. As they say in Oregon: "Just do it".
>
> Mike
>
> On Wed, Jan 25, 2012 at 9:47 AM, J N Hiller
> <jnhiller at earthlink.net <mailto:jnhiller at earthlink.net>> wrote:
>
> Having judged these sequences I absolutely agree that they
> have become more demanding. Do you think you could fly the
> current schedules with 2006 battery technology?
>
> Not in a hurry to go E-Power but interested.
>
> Jim
>
> -----Original Message-----
> *From:* nsrca-discussion-bounces at lists.nsrca.org
> <mailto:nsrca-discussion-bounces at lists.nsrca.org>
> [mailto:nsrca-discussion-bounces at lists.nsrca.org
> <mailto:nsrca-discussion-bounces at lists.nsrca.org>]*On Behalf
> Of *Del
> *Sent:* Wednesday, January 25, 2012 6:55 AM
> *To:* General pattern discussion
> *Subject:* Re: [NSRCA-discussion] Main battery redundant lead
> for receiver
>
> **Dave.. Love how you win your discussions.. lol .. ;+} **
>
> ** **
>
> ** Del**
>
> ----- Original Message -----
>
> * *
>
> *From:*
> Dave Lockhart <mailto:DaveL322 at comcast.net>
>
> *To:* 'General pattern discussion'
> <mailto:nsrca-discussion at lists.nsrca.org>
>
> *Sent:* Tuesday, January 24, 2012 7:07 PM
>
> *Subject:* Re: [NSRCA-discussion] Main battery redundant lead
> for receiver
>
> 2006
>
> 9411sa x2 for ailerons
>
> 8417sa x1 for elevator
>
> 8411sa x1 for rudder
>
> 2009
>
> Changed to 3517 x2 for elevator (in the same plane)....no
> change in mah per flight
>
> 2010
>
> Changed to 8611A on rudder (in the same plane)....no change in
> mah per flight
>
> Flight times are about 45 seconds shorter now.
>
> I still have the Prestige I flew in 2006, so no change to
> control surface size or throw.
>
> I'm pretty sure it is the changes in maneuvers flown and
> higher average watts used by the motor in the course of the
> flight. J
>
> Regards,
>
> Dave
>
> *From:* nsrca-discussion-bounces at lists.nsrca.org
> <mailto:nsrca-discussion-bounces at lists.nsrca.org>
> [mailto:nsrca-discussion-bounces at lists.nsrca.org
> <mailto:nsrca-discussion-bounces at lists.nsrca.org>] *On Behalf
> Of *Peter Vogel
> *Sent:* Tuesday, January 24, 2012 6:59 PM
> *To:* General pattern discussion
> *Subject:* Re: [NSRCA-discussion] Main battery redundant lead
> for receiver
>
> Digital servos *definitely* draw more power than non-digitals,
> but they are much more precise and hold their position better,
> it's worth the higher draw for pattern.
>
> Peter+
>
> On Tue, Jan 24, 2012 at 3:46 PM, Doug Cronkhite
> <seefo at san.rr.com <mailto:seefo at san.rr.com>> wrote:
>
> I suspect the servos also draw more power than they did years ago.
>
> Doug
>
> Sent from my iPhone
>
>
> On Jan 24, 2012, at 3:40 PM, "Dave Lockhart"
> <DaveL322 at comcast.net <mailto:DaveL322 at comcast.net>> wrote:
>
> When I first started flying electric pattern.....mah per
> flight was noticeably lower than now, going from 40-60 per
> flight to 60-80 per flight.....flying whatever was the current
> P/F sequences. I suspect the increase is due to higher
> average flight speeds (much more watts at the motor now) and
> more demanding maneuvers (snaps and KE).
>
> Regards,
>
> Dave
>
> *From:* nsrca-discussion-bounces at lists.nsrca.org
> <mailto:nsrca-discussion-bounces at lists.nsrca.org>
> [mailto:nsrca-discussion-bounces at lists.nsrca.org
> <mailto:nsrca-discussion-bounces at lists.nsrca.org>] *On Behalf
> Of *Keith Hoard
> *Sent:* Tuesday, January 24, 2012 11:02 AM
> *To:* General pattern discussion
> *Subject:* Re: [NSRCA-discussion] Main battery redundant lead
> for receiver
>
> Anthony,
>
> On a typical flight, I'm guessing the radio only uses
> around 100-150Mah of power, while the motor is using 4000Mah,
> so that's about 4% more draw on those two cells. In practice,
> I haven't been able to see any difference in the radio cells
> when I hook them up to my charger at the end of a flight.
> Sometimes cells #1 & #2 are the high cells after a flight, so
> I think the power draw of the radio is negligible to our motor
> packs.
>
> The problem with two regulators plugged into the same 10S (or
> 5S) pack is that you are creating a dead short between the
> cells thru the ground wires (typically a straight wire thru
> the regulator).
>
> Say you plug Regulator #1 into cells #1&2, and Regulator #2
> into cells #6&7. The regulator's */ground /*wires now have 5
> cells of voltage potential (5 X 4.2V = 21Volts) between them
> since they are plugged into cells # 1 and #6. When those two
> ground wires are then plugged into your receiver either thru a
> switch or direct connection the magic smoke will escape and
> your retailer will rejoice.
>
> Also, if you have both of your regulators plugged into your
> motor pack and the packs eject like Goose in Top Gun, you've
> lost both of your redundant power sources. However, if you
> use a tiny 2S LiPo that is physically separated and secured
> inside your plane, you have both electrical and physical
> redundancy.
>
> Hmmm, just thought of something . . . maybe we should tie down
> the receiver so the main regulator can't take the receiver out
> with it. . . so many contingencies, so little weight . . .
>
> Keith Hoard
> Collierville, TN
> khoard at gmail.com <mailto:khoard at gmail.com>
>
> On Tue, Jan 24, 2012 at 8:15 AM, Anthony Romano
> <anthonyr105 at hotmail.com <mailto:anthonyr105 at hotmail.com>> wrote:
>
> Seems like a great idea but I have two questions. Do the packs
> come down out of balance since two cells are serving extra
> load? Is there a problem with parallel operation of two
> regulators?
>
> Thanks,
>
> Anthony
>
> ------------------------------------------------------------------------
>
> From: joddino at socal.rr.com <mailto:joddino at socal.rr.com>
> Date: Mon, 23 Jan 2012 15:25:00 -0800
> To: nsrca-discussion at lists.nsrca.org
> <mailto:nsrca-discussion at lists.nsrca.org>
> Subject: Re: [NSRCA-discussion] Main battery redundant lead
> for receiver
>
> I've been using this setup for sometime and it is working
> great. I have my two cell LiPo charged to 7.5 volts and it is
> connected to a 6.0 volt regulator into the receiver. The
> cable connected to the balance connector on the "bottom" 5S is
> connected to a 6.3 volt regulator so it supplies all the
> current to the system and the 2S pack never needs charging..
> I'm using an 800 mAh pack but it could be even smaller.
>
> Jim O
>
> On Jan 23, 2012, at 2:09 PM, Scott McHarg wrote:
>
> Guys,
> Chris Moon just e-mailed me about some leads that were done
> at the factory. These leads run off your balance leads to a
> voltage regulator and allow your main battery pack to be
> utilized as a redundant receiver battery. It is NOT meant to
> be a primary but it will save 20+ grams if you're running 2 rx
> batteries. You still have to run the 2nd regulator for true
> redundancy but you eliminate the 2nd battery. These leads are
> factory made and eliminate the need to make them yourself with
> the concern about plugging in to the wrong cell. I know in my
> article, I was pretty much against doing this as a backup but,
> with Chris having this made at the factory, he has all but
> eliminated making a mistake by tying to the wrong cell. I
> have the link that I'll e-mail you off-list or you can just go
> to his website. I don't want to break the NSRCA list rules by
> advertising for him even though he advertises with the NSRCA.
> The leads are only $3.99 each and are found under the
> Connectors/Adapters listing.
>
> Thank,
> Scott
>
> --
> *Scott A. McHarg*
>
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>
> --
>
> Director, Fixed Wing Flight Training
>
> Santa Clara County Model Aircraft Skypark
>
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>
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--
Phil Spelt, KCRC President
AMA 1294 Scientific Leader Member
SPA 177 Board Member
(865) 435-1476v, (865) 604-0541c
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