Re: No-Cal performance data follow-up

From: Bill Gowen <b.gowen_at_comcast.net>
Date: Mon, 9 Mar 2009 12:12:09 -0400

That's all it takes!

I know - I'm still stuck with wanting to know the width also. But the truth is that the thickness of Tan 2 varies enough that the weight per inch is a more reliable unit of measure. My last time out to fly I hurriedly cut some 2/99 for my SO model. I cut it smaller than what I had used previously but the final 1.5g motor was shorter than the previous motor due to the rubber being thicker.

  ----- Original Message -----
  From: LeRoy C Cordes
  To: Indoor_Construction_at_yahoogroups.com
  Sent: Sunday, March 08, 2009 5:04 PM
  Subject: Re: [Indoor_Construction] No-Cal performance data follow-up



  Gary, you didn't give motor size other than length and weight

  LeRoy Cordes
  AMA 16974
  Chicago, IL
  In God We Trust


  On Sat, 7 Mar 2009 18:09:00 EST Warthodson_at_aol.com writes:
    Approx. 1 month ago I posted some No-cal performance data & ask for suggestions on how I might increase flight times in a low ceiling (17.5') site where scrubbing was not practical. This is the follow-up report I promised.

    Previously reported data:

    Prop: 7" diameter, 1.285 P/D
    motor: 14.75" loop, Tan II 3/02, .80 gram
    Total turns 2100, back off to 1900 launch turns, 350 turns left,
    flight: 181 sec.

    Prop: same as above
    motor: 16" loop, Tan II 3/02, .85 gram
    Total turns 2400, back off to 2250 launch turns, 500 turns left,
    flight: 199 sec.

    Prop: 7" diameter, 1.36 P/D
    motor: 17" loop, Tan II 3/02, .93 grams
    Total turns 2700, back off to 2400 launch turns, 450 turns left,
    flight: 209 sec.

    Aki suggested a higher pitch prop.

    Results:
    Prop: &" diameter, 1.50 P/D
    motor: 17" loop, Tan II 3/02, .93 grams (same as above)
    Total turns 2560, back off to 2400 launch turns, 700 turns left
    flight: 229 sec.

    All the above represent average data based on several flights.

    What would you suggest next?

    Thanks,
    Gary Hodson




------------------------------------------------------------------------------
  A Good Credit Score is 700 or Above. See yours in just 2 easy steps!



  LeRoy Cordes
  AMA 16974
  Chicago, IL
  In God We Trust


  ____________________________________________________________
  Digital Photography - Click Now.

  


------------------------------------------------------------------------------



  No virus found in this incoming message.
  Checked by AVG - www.avg.com
  Version: 8.0.237 / Virus Database: 270.11.9/1991 - Release Date: 03/09/09 07:14:00
Received on Mon Mar 09 2009 - 09:12:20 CET