[NSRCA-discussion] weight difference

[Ron Van Putte]

Dave WAS trying to show the difference between glow and electric.

Generally, airplanes that started out as glow-powered are heavier  
than one for electric power, because of the vibration.  The  
difference between the two packages gets complicated.  For glow, you  
include spinner, prop, engine, motor mount, ignition system, fuel  
tubing (and fittings), fuel tank and anything else which is  
exclusively for glow.  For electric, you include spinner, prop,  
motor, motor mount, ESC, wiring, lipo batteries and anything else  
which is exclusively for electric.  When you add it up, the weight  
differences can be pretty dramatic.  If you don't carefully select  
all the components, you can easily add an unneeded 4 ounces to an  
electric-powered airplane.

Ron

On Aug 17, 2010, at 7:49 AM, Dr Mike wrote:

> Thanks Dave, I am referring only to the power packages,not the  
> planes. Those are what I am looking for, the difference between  
> glow and electric.
>
> Mike
>
>
>
> From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca- 
> discussion-bounces at lists.nsrca.org] On Behalf Of Dave
> Sent: Tuesday, August 17, 2010 7:41 AM
> To: 'General pattern discussion'
> Subject: Re: [NSRCA-discussion] weight difference
>
>
>
> 12 oz +/-4 oz.
>
>
>
> Exact number depends on a bunch of things –
>
> - on the electric side, which motor, motor mounting, ESC, lipo, RX  
> power system?
>
> - was the plane originally built lighter for electric, or with more  
> beef for glow?
>
> - CDI / non CDI, type of mount, and what type of ignition and RX  
> power?
>
>
>
> I can tell you that a number of Prestige planes have been built  
> with various glow and electric power plants.  For the most part,  
> the glow airframes are +4 oz to start with (the added beef for glow  
> vibration).  Most of the glow setups ended up at 9.5 lbs, +/- 4  
> oz.  Most of the electrics ended up at 10.25 lbs, +/- 4 oz.
>
>
>
> Regards,
>
>
>
> Dave
>
> From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca- 
> discussion-bounces at lists.nsrca.org] On Behalf Of Dr Mike
> Sent: Tuesday, August 17, 2010 8:33 AM
> To: 'General pattern discussion'
> Subject: [NSRCA-discussion] weight difference
>
>
>
> Could someone tell me the difference in weight between say a YS 1.7  
> with muffler/tank,etc vs electric?
>
> Thanks
>
> Mike
>
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