[NSRCA-discussion] Electrics

[seefo at san.rr.com]

My EU-1000i is so quiet at the field, sitting next to my car that if 
ANYTHING else is running you can't hear it.

-Doug


----- Original Message -----
From: Earl Haury <ehaury at houston.rr.com>
Date: Friday, April 14, 2006 6:10 pm
Subject: Re: [NSRCA-discussion] Electrics
To: NSRCA Mailing List <nsrca-discussion at lists.nsrca.org>

> At least the good news with the Honda is that it's CARB certified 
> (has a catalytic converter) and is quiet, max of 59 dB @ WOT, 
> closer to 53 powering chargers, lots better than most gens (of 
> course this is reflected in the price). 
> 
> Earl
>  ----- Original Message ----- 
>  From: John Pavlick 
>  To: NSRCA Mailing List 
>  Sent: Friday, April 14, 2006 7:08 PM
>  Subject: Re: [NSRCA-discussion] Electrics
> 
> 
>  Yeah, and the glow motors are more environmentally friendly 
> (emissions-wise) than the gasoline motor in the generator. And 
> they don't generate waste oil which has to be recycled. Not to 
> mention the lead in the deep cycle batteries that will eventually 
> have to be recycled as well. How loud is the generator compared to 
> a glow pattern plane? Don't forget, even when you charge from the 
> wall using a power supply, THAT energy probably didn't come from 
> hydro-electric power plants or solar cells. Geez, the more you 
> think about it...
> 
>  John Pavlick
>  http://www.idseng.com
>    
> 
>    -----Original Message-----
>    From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-
> discussion-bounces at lists.nsrca.org]On Behalf Of Earl Haury
>    Sent: Friday, April 14, 2006 7:51 PM
>    To: NSRCA Mailing List
>    Subject: Re: [NSRCA-discussion] Electrics
> 
> 
>    The AGM (absorbed glass mat) deep cycle batteries are probably 
> a better choice than gel. At least the AGM can be charge at high 
> current (less time) than the gel cell and can cost less. I have an 
> Optima 55 Ahr AGM (120 min @ 25A reserve rating) that works well 
> for 3 charges using a pair of Astros, will do a 4th charge if  
> single chargers are used. It accepts 55A @ 14.2V from the Iota, 
> current tapers as batt voltage rises - takes about 3hr until 
> charge rate drops to 1A.
> 
>    Also picked up a Honda EU2000i generator. This thing is barely 
> off idle running 4 Astros from an Iota supply. Picks up a little 
> if a 400W soldering iron and shop fan is added. Living in a 
> hurricane area I justified it as being able to also handle a few 
> (select) household items. It does seem a bit ironic to change to E 
> for airplanes and buy a gasoline fueled device to charge them -ugh!
> 
>    Earl
> 
> 
>      ----- Original Message ----- 
>      From: Nat Penton 
>      To: NSRCA Mailing List 
>      Sent: Friday, April 14, 2006 2:08 PM
>      Subject: [NSRCA-discussion] Electrics
> 
> 
>      The only battery giving me a problem is the lead acid Marine 
> 'deep discharge'  battery used for field charging of the lipos. It 
> has lost about 70% of it's capacity in seven months.
> 
>      It provided six 12min flts when new and was purchased from 
> Academy Surplus for $40. It has provided a total of maybe 80 
> flights ( 30 cycles ??? ). The problem is likely due to my 
> maintenance ( lack thereof ). I left the battery in a partial 
> discharge state sometmes for weeks. You can find maintenance needs 
> on Google at agmbatteries, courtesy Earl Haury.
> 
>      West Mountain sells a gell cell, 54#, 84ah, rated for 500 
> cycles @ 100% discharge ( 20hr discharge rate ), $149 del. I will 
> see how it performs under our conditions.
>                                                            Nat
> 
> 
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