[SPAM] Re: Glow Engine Vs. Electric Engine for 2 m' pattern plane

[John Ferrell]

You fellows have done a good economic review of the flat-out electric 
airplane.
How about considering a lower level entry airplane? Are they at all 
competitive price wise?
Consider something with ONE of those $325 batteries... Is that enough to 
power a 90-size airplane?

Also, I am not believing electric motors and gear boxes run forever. Are 
they rebuildable or are they junk at some end-of-life?

John Ferrell
http://DixieNC.US

----- Original Message ----- 
From: "Adam Glatt" <adam.g at sasktel.net>
To: <discussion at nsrca.org>
Sent: Saturday, May 28, 2005 11:14 PM
Subject: Re: [SPAM] Re: Glow Engine Vs. Electric Engine for 2 m' pattern 
plane


> If one were to run the numbers for Thunder Power batteries @ $325 each 
> half, it works out to $1300 for two batteries. If you only have two 
> batteries, I hope you enjoy watching other people fly (or take your glow 
> plane). Personally, I consider three batteries the bare minimum for 
> practicing pattern, which puts that at $1950 for batteries only.
>
> Guessing 200 flights per battery (probably a overestimation), that is 
> $3.25 per flight.
> Guessing 6 flights per gallon with a 1.60DZ (perhaps an overestimation), 
> that is $3.33 per flight.
>
> The 160DZ is most comparable with the higher performance electric motors 
> (Plettenberg Xtra 25 and Hacker C50XL), each costing $400. A controller is 
> $250-350.
>
> Two battery chargers is also a bare minimum. They will last forever, so 
> spending extra on more is a good investment.
>


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