[NSRCA-discussion] weight difference

[Ron Van Putte]

Yes.

On Aug 17, 2010, at 9:01 AM, Keith Hoard wrote:

> More or less?
>
> On Tue, Aug 17, 2010 at 3:58 PM, Ron Van Putte <vanputte at cox.net>  
> wrote:
> Tough question.  Will you insist on using 30C lipos, when 20C lipos  
> are much lighter?  Do you plan on using a particular motor?  Motor  
> weights vary substantially.  Some ESCs are a lot heavier than others.
>
> My guess would be that the weight difference between a complete  
> electric-power system and a complete glow-power system,  
> disregarding the airplane, would be 10-16 ounces.
>
> Ron
>
>
> On Aug 17, 2010, at 8:51 AM, Dr Mike wrote:
>
> Ok so I am going to ask the question again... in your estimation  
> what is the
> difference in weight between the complete electric power system and  
> the
> complete glow system-disregarding the airplane?
> Mike
>
> -----Original Message-----
> From: nsrca-discussion-bounces at lists.nsrca.org
> [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Ron  
> Van Putte
> Sent: Tuesday, August 17, 2010 8:30 AM
> To: General pattern discussion
> Subject: Re: [NSRCA-discussion] weight difference
>
> 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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>
> -- 
>
> Keith Hoard
> Collierville, TN
> khoard at gmail.com
>
>
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