Register

If this is your first visit, please click the Sign Up now button to begin the process of creating your account so you can begin posting on our forums! The Sign Up process will only take up about a minute of two of your time.

Results 1 to 15 of 15

  1. #1

    Join Date
    Dec 2009
    Location
    plano, IL
    Posts
    62
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    3w 120i b 2 f

    im getting ready to install this engine on a knoxhobbies pitts m12same as a blazing wing pitts m12 any one did this yet ???? and what size prop should i run???? thanks guys

  2. #2

    Join Date
    Jul 2008
    Location
    qld, AUSTRALIA
    Posts
    199
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 3w 120i b 2 f

    Dunno that motor, but I am assembling that pitts with a DA-120. Going to use a Mezjlik 28x12.

    Are you going to use the stock undercart?

  3. #3

    Join Date
    Jan 2002
    Location
    Ithaca, NY
    Posts
    1,015
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 3w 120i b 2 f

    Hi,

    If you use a 28 x 10, you can expect between 6000 and 6500 rpms depending on the condition of the engine.

    Hope this helps

    Elson
    Using this Hobby for Science (aerobiology)

  4. #4

    Join Date
    Dec 2009
    Location
    plano, IL
    Posts
    62
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 3w 120i b 2 f

    this w3 120 is kinda heavy. at around high 8 lb maybe 9lb it puts out about 11.5 hp from what i can find out. do you think i should go with the dle 111 it weight is around 6.5 lb and puts out 11.5 hp .eather way i go im useing stock cans

  5. #5

    Join Date
    Jul 2003
    Location
    Gray, GA
    Posts
    1,173
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 3w 120i b 2 f

    I have a friend that has that engine in an Extreme Flight Yak. Yes it is a little heavy but he swares the power and torque it produces is worth the weight.
    He runs a 29/10.

  6. #6

    Join Date
    Jan 2002
    Location
    Ithaca, NY
    Posts
    1,015
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 3w 120i b 2 f

    Hi,

    I have both 3w-106s and 3w-120s. On paper, they are rated close to the same power but the 120s have significantly more grunt than the 106s. Heavier engines, yes but more torque due to the larger displacement.

    Elson
    Using this Hobby for Science (aerobiology)

  7. #7

    Join Date
    Feb 2002
    Location
    Valley Springs, CA
    Posts
    18,602
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 3w 120i b 2 f

    Yup, that's a stone cold fact..

    People like to under rate the heavier 3w's. Don't ever put the competiton's 150 up against a 3w-140. I hate to see grown men cry
    Never lie, and never minimize or gloss. Tell it like it is and let the pieces fall where they may. The truth always wins.

  8. #8
    Coke's Avatar
    Join Date
    Jan 2005
    Location
    Rhuddlan, UNITED KINGDOM
    Posts
    69
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 3w 120i b 2 f

    That's nice to know TOM I've just bought a 3W Ultimate with a 140 in it but I'm waiting for a WB25 carb for it

  9. #9

    Join Date
    Jan 2002
    Location
    Ithaca, NY
    Posts
    1,015
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 3w 120i b 2 f

    Hi,

    The main problem with the 120 is that it weighs the same as the 140 and 150 (within a couple of oz) so if you are going to run a 120, you might as well find a 140 and fly with throttle management.

    Two of the 4 older 140s that I use post better numbers than a lot of people post flying a DA 150. The other two turn similar numbers. These are those old engines with the brown fiber carb block.

    Elson
    Using this Hobby for Science (aerobiology)

  10. #10

    Join Date
    Mar 2002
    Location
    Kannapolis, NC
    Posts
    7,415
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 3w 120i b 2 f

    does the older 3w still use that brown block if it goes bad or has a new better item replaced it?
    smooth as silk!

  11. #11

    Join Date
    Jan 2002
    Location
    Ithaca, NY
    Posts
    1,015
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 3w 120i b 2 f

    Hi,

    I still use the brown block. As I recall, DA made a black block which was a preferred replacement. I just use 2 carb gaskets and do not over tighten the carb bolts which warp the brown block. Perhaps the newer 3w poly setup found on the newer 150s would work.

    Elson
    Using this Hobby for Science (aerobiology)

  12. #12
    Coke's Avatar
    Join Date
    Jan 2005
    Location
    Rhuddlan, UNITED KINGDOM
    Posts
    69
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 3w 120i b 2 f

    3W now list either a black plastic one or an aluminium one on their webpage I believe the alloy one is cheaper

  13. #13

    Join Date
    Jan 2002
    Location
    Ithaca, NY
    Posts
    1,015
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 3w 120i b 2 f

    Coke,

    I believe the parts you are talking about are for the new style engine. The old style requires the block. For a few extra bucks, you may be able to convert the old style to the new style. Call Gerhard at AI and ask.

    Elson
    Using this Hobby for Science (aerobiology)

  14. #14
    flyinrazrback's Avatar
    Join Date
    Jul 2002
    Location
    Fort Smith, AR
    Posts
    3,778
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 3w 120i b 2 f

    I can't remember who is making them, but someone is making the aluminum carb block for the old style 3w engines.
    \"You\'ll get your chance smart guy!\"

  15. #15

    Join Date
    Mar 2002
    Location
    Kannapolis, NC
    Posts
    7,415
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: 3w 120i b 2 f

    f back who even is making those blocks is that a replacement for that red/brown block?
    smooth as silk!


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
All times are GMT -6. The time now is 12:33 AM.

SEO by vBSEO 3.6.1 ©2011, Crawlability, Inc.