Motor Costs Comparison

[Wayne Galligan]

OS 1.40RX,  20oz tank, 15% Cool Power,  17x13 prop  
10lb 4oz airplane.  =  20 minutes flying time.

Wayne G.
  ----- Original Message ----- 
  From: Terry Brox 
  To: discussion at nsrca.org 
  Sent: Thursday, September 16, 2004 9:05 PM
  Subject: Re: Motor Costs Comparison


  I timed my 2 flights tonight flying a DZ, no restrictor, 30% cool power, 20oz tank. Winds were 12 to 15 out of the south. I got 11 min on each flight. When I landed, the tank was definately dry. 
    ----- Original Message ----- 
    From: Bill Glaze 
    To: discussion at nsrca.org 
    Sent: Thursday, September 16, 2004 8:49 AM
    Subject: Re: Motor Costs Comparison


    My 1.40 FZ's all seem to run at 14 minutes for about 18 oz.. give or take.   the L takes just a little bit more.  Using 15% fuel.  Bill Glaze

    John Pavlick wrote:

      Bob,
       Interesting comparison. Some people will always favor the 4-stroke because they have a different feel but it's interesting to see the fuel consumption. I was worried about this. Up to now the biggest motor I have been flying is an OS .61 Long Stroke. It eats fuel at a pretty good rate. >From what you're showing, it looks like the 1.60 will actually get better mileage. I'm assuming this is because you don't need to fly it at full throttle all the time. I'm surprised at the big difference between the 1.60 and the YS. My small 4-strokes (.40 - .46) get much better mileage than their 2-stroke equivalents. I have an Enya .46 4-stroke in an Ace 4-40 that flies well over 10 minutes on a 6oz. tank whereas a .40 2-stroke would need at least an 8oz. tank. If you can get 8 minutes out of less than 7oz. of fuel with the 1.60, you must be doing something right. It looks like I should be happy with my new motor next season...
      John Pavlick
      http://www.idseng.com
        

        -----Original Message-----
        From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]On Behalf Of Bob Pastorello
        Sent: Wednesday, September 15, 2004 10:28 PM
        To: NSRCA
        Subject: Motor Costs Comparison


        Had some questions from the last contest, so decided to do a little spreadsheet.  Just comparing operation of the YS 1.40 DZ to the OS 1.60  (performance being roughly equal, according to feedback I've received from observers of my setup).
            Not starting some battle;  just providing some information that some may find helpful.
        http://www.rcaerobats.net/MotorCostComparison.htm

        Bob Pastorello
        rcaerobob at cox.net
        www.rcaerobats.net

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