Questions

[Jeff Hughes]

Mike,
I did talk with Jim and have a canopy coming. Thanks for the info on that. And it does look like my temptation will have my tried and true OS1.40 in it. Electrics will have to come a long way before it's competitive for guys like me. I only went through a case and a half of fuel this year (9 gallons X $11 = $99). Those batteries would have to last me 7 years for the financials to work out. I wonder how long the batteries will last in the Toyota Prius? That'll be a shock for people when they have to start replacing 150 lbs worth of Nimh's. 
Jeff

  ----- Original Message ----- 
  From: mike mueller 
  To: discussion at nsrca.org 
  Sent: Saturday, October 16, 2004 8:16 AM
  Subject: Re: Questions


   Jeff E Pattern is still a tough proposition. It'll be cool when the technology and the costs make it mainstream. Until then I'm buying a new YS DZ 160 and keeping my fingers crossed that it doesn't blow up! Mike

  Jeff Hughes <jeffghughes at comcast.net> wrote: 
    Ouch. I was hoping it to be closer than that. I keep reading about these 
    large scale electric planes being flown with 28 Nicads or nimh, they must 
    not have the performance we need?



    ----- Original Message ----- 
    From: "Jerry Budd" 
    To: 
    Sent: Friday, October 15, 2004 11:07 PM
    Subject: Re: Questions


    > HI Adam,
    >
    > The ThunderPower 10s3p LiPo's Frack & I use (Jason too) are actually 
    > 42volts, 6ahr = 252 Whr
    >
    > so that actually works out to ~66 cells and 5 lbs difference in weight to 
    > use Nimh. Not a realistic scenario.
    >
    > Thx, Jerry
    >
    >>lipo 10s3p - 33volts, 5ahr = 165Whr
    >>Nimh gp3300 - 1.15volts/cell, 3.3ahr = 3.8Whr/cell works out to 43cells to 
    >>store the same energy.
    >>^All rough average quick numbers, of course.
    >>
    >>Thunder Power lipo costs $680 and weighs 1.1kg.
    >>Epic GP3300 costs - around $220 and weighs 2.7kg.
    >>That is a weight difference of about 3.5lbs.
    >>
    >>And that is ignoring the problem of parralleling NiMH batteries (as I 
    >>understand it, this isn't supposed to be done), and how much extra energy 
    >>would be required to carry those 3.5lbs, and the decreased voltage caused 
    >>by cold GP3300s. I think the GP2200's have a higher energy density, so 
    >>they might make the numbers a little better, but the point remains.
    >>=====================================
    >># To be removed from this list, go to http://www.nsrca.org/discussionA.htm
    >>and follow the instructions.
    >
    >
    > -- 
    > ___________
    > Jerry Budd
    > mailto:jbudd at qnet.com
    > =====================================
    > # To be removed from this list, go to http://www.nsrca.org/discussionA.htm
    > and follow the instructions.
    > 

    =====================================
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