TT Pro 1.20 Question

[Mike Hester]

Yes, but it's not necessary at all. If I were you Tom, airframe allowing, I'd use that CD exhaust. That thing was SMOOTH and very quiet, like about 90db or so. You MAY lose some of that transition with a pipe, unless you set it up right. And even then, who knows.

I forgot to ask (I just ASSumed) Paul this IS the rear exhaust pumped version and not the side exhaust one right? I was referring to the RE pattern engine. And it would hover a 9.8 lb plane at half throttle with a 12 pitch prop.

-Mike

  ----- Original Message ----- 
  From: Tom Hinton 
  To: discussion at nsrca.org 
  Sent: Tuesday, June 29, 2004 7:52 PM
  Subject: Re: TT Pro 1.20 Question


  Does the pump create enough of a vacuum to use a one way valve?
    ----- Original Message ----- 
    From: Rcmaster199 at aol.com 
    To: discussion at nsrca.org 
    Sent: Tuesday, June 29, 2004 7:35 PM
    Subject: Re: TT Pro 1.20 Question


    It sounds like a pumped set-up. The tank vent should be left open during operation, to allow air to enter as the fuel is used up. The caveat is that the vent will often syphon fuel out if the vent is out in the slip stream. I use a YS check valve to allow air in but no fuel out.

    The 2 stroke 120 engine type should be able to turn a 16x10-11;  17x9-10 fairly well in the usable rpm range we need.

    Why such a large engine on such a small model?

    MattK



      Subj:TT Pro 1.20 Question 
      Date:6/29/2004 6:46:38 PM Eastern Daylight Time
      From:pwl45 at yahoo.com
      Reply-to:discussion at nsrca.org
      To:discussion at nsrca.org
      Sent from the Internet 



      I'm experimenting with a Thunder Tiger Pro 1.20 and wondered if anyone knew
      how the tank should be vented. The manual says to run the fuel pickup line
      to the inlet on the pump and connect the pump outlet to the carb. Then it
      says, "Never to connect the tube from muffler/pipes pressure nipple to fuel
      tank with this pump system." I'm thinking I just need to run an open vent
      line. Does that sound right?

      Also, any advice on what prop to run?
      This engine will be in a Tai Ji .60, runnning Pro Pattern 20%, weighting 9
      lbs and running the TTR 9712 pipe.



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