[NSRCA-discussion] Fw: Generators again

[Bob Richards]

The "clean sine wave" is over hyped, IMHO. Maybe for old computers this was a problem, but for most modern switching power supplies it is not an issue.
 
The power converters used in RVs are very robust, and most RVs run on generators (non-inverters) and are in fact designed to. The only issue I have ever heard of an RV running on a generator is that some microwave ovens use the input line frequency for clock frequency - the timers may run twice as fast as they should due to the poor waveform from some (not all) generators. Since a lot of pattern guys use Iota converters as a 12v power source for their chargers, this is not a problem.
 
I use a cheap 12v 20A power supply on the generator I listed, and have never had a problem. If anyone on the NSRCA list has first hand knowledge of a generator problem charging Lipos, I would like to hear it.

Bob R.
 

________________________________
 From: "devans422003 at yahoo.com" <devans422003 at yahoo.com>
To: Bob Richards <bob at toprudder.com>; General pattern discussion <nsrca-discussion at lists.nsrca.org> 
Sent: Monday, October 1, 2012 5:08 PM
Subject: Re: [NSRCA-discussion] Generators again
  

The big issue is inverted power versus generated power. The higher end models such as Honda or Yamaha have a cleaner sine wave power output. This is important if you are running delicate electronic circuits such as our chargers or a computer. I found a use Honda on Craigslist for $300.  You can buy them new online, including shipping for around $700. 
 
The second issue is noise levels. There is at least a 7-10db noise level difference between the Honda generators and the Harbor Freight units. You can have a conversation right next to one and not annoy your flying friends.
 
Dennis Evans
 

________________________________
 From: Bob Richards <bob at toprudder.com>
To: General pattern discussion <nsrca-discussion at lists.nsrca.org> 
Sent: Monday, October 1, 2012 4:01 PM
Subject: Re: [NSRCA-discussion] Generators again
  

This is one I use occasionally:
 
http://www.tractorsupply.com/sportsman-trade-2000-watt-portable-gasoline-generator-4458506
 
It normally sells for $200, but they occasionally have it on sale for $150 (like RIGHT NOW!). It is four-stroke so no mixing fuel (or smoke or fumes while running). I've had good luck with mine. It is not as quiet as the inverter generators, but it certainly is not very loud. I back my truck/trailer to the flight line, run an extension cord with the generator in front of the truck. Not objectionable at all.
 
Just keep in mind the size of the power supply and chargers you will be using and make sure you keep the power down to around 1400 watts or less. This is never a problem for me, but I don't fly anything (yet) over 4S.
 
Bob R.
 
 

________________________________
 From: "HankPajari at aol.com" <HankPajari at aol.com>
To: nsrca-discussion at lists.nsrca.org 
Sent: Monday, October 1, 2012 4:01 PM
Subject: Re: [NSRCA-discussion] Generators again
  



Hi, lurker here pattern wannabe 

I know there were a few threads in the last couple of years discussing 
generators.  I did a search on the website and only came up with a couple 
of hits on generators and none on Harbor Freight. 

If memory serves, the discussions centered around upper end 
generators.  At this time I cannot justify spending a grand or two for 
something that is probably massive overkill. 

I mainly fly sport.  Eventually I want to get into pattern.  My 
biggest LIPO pack right now is a 4S1P.   

At my age, once I get into pattern my destination would be Masters and not 
crashing.  I have no belief that I will be competitive at other than local 
contests. 

I use Hyperion 606i chargers, one AC/DC and one DC only.  When I get 
into pattern I assume that I will have to upgrade chargers to accommodate larger 
packs.  I bought 3 OS 160s when I started getting serious but as time 
passes and I read the posts on the discussion board I am backing off that 
position and will be going electric.  (If gas was a viable option that is 
the direction I would jump at). 

Getting down to business now.  Harbor Freight will be having a sale in 
a couple of weeks on a portable generator.  It's regular price 
is $179.99 and will be on sale for $79.99.  Item number 66619.  
Pros and Cons are: 

Pro -  
Light, just under 40 lbs. 
According to the reviews it is fairly quiet and reliable, after 
putting a better plug in it and going over it and tightening the screws and 
bolts. 
5 hour run time at half load, one gallon fuel tank so can assume 5 
hour runtime per gallon.  Probably only need 2 gallons fuel per 
contest. 
Looks fairly small. 

Con -  
Gas and Oil 2 stroke. 
800 Watt, 6.6 Amp rated. 
One 120v outlet. 
Recoil start. 

Would some of you that really know something about this please review the 
above and give me your comments? 

Thanks 

Hank
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