[NSRCA-discussion] weight difference

[Ron Van Putte]

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
>>
>> _______________________________________________
>> NSRCA-discussion mailing list
>> NSRCA-discussion at lists.nsrca.org
>> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>
> _______________________________________________
> NSRCA-discussion mailing list
> NSRCA-discussion at lists.nsrca.org
> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>
> _______________________________________________
> NSRCA-discussion mailing list
> NSRCA-discussion at lists.nsrca.org
> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion