FRCFoamies Mig 2.88 AFC- Plan Available!

Discussion in 'FRCFoamies Plans' started by F1wanabe, Mar 7, 2015.

  1. FED50H

    FED50H Administrator

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    First plane flight in a long time. Not very impressive flying, but I'm rusty... Great looking plane though. With the smaller wing span, torque roll is noticeable and the throws need to be adjusted, as they really move the smaller version around...

     
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  2. Flybyknight22

    Flybyknight22 Top Gun

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    As you can see these parts of the plans do not fit on a standard sheet of MPF foam.

    So what I will probably do is cut completely through the score and fold lines on the plans for the rudder/body, then cut them out separately in 3 pieces.

    After that I will tape the fold foam parts back together and glue it up normally.

    image.jpeg
     
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  3. Flybyknight22

    Flybyknight22 Top Gun

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    No worries,

    Splitting up the print out makes it fit on standard MPF sheet and saves foam.

    image.jpeg
     
  4. F1wanabe

    F1wanabe Administrator

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    Thats exactly what I do since the plans are for a standard Depron sheet. The only piece that needs to be separated is the piece you show- the nacelle/stabilizer piece. And I only needed to cut the one score line on the nacelle.
     
  5. Flybyknight22

    Flybyknight22 Top Gun

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    F1,

    Yup that works well and saves a little foam to boot.

    Good info for those using MPF and have a hard time getting Depron now.

    Got those parts back together without problem.

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  6. Flybyknight22

    Flybyknight22 Top Gun

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    So far this has been a "guerrilla" build.

    Used a ruler to get straight lines on bottom and right side of paper margins for cutting as B/W printer doesn't show up the red dots for guides.

    No spray glue of the plans to the foam.
    No print shop.

    Just taping sections of the tiled plans together and then taping them down on the MPF to cut.

    Never tried that before until now.

    It's probably a bit more difficult and somewhat more time consuming.

    It works but not as precise or as easy doing it the more traditional way but if you,...

    "got no spray glue" and you " got no print shop" and you "got no give a rip!",.. This works just fine :)

    image.jpeg
     
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  7. homey666

    homey666 Top Gun

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    Exactly what I've done the last 2 builds, FBK. The spray glue was really making things messy and I found I was really plowing through replacement Xacto blades.

    Peter
     
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  8. Peter just clean the blades every now and then. The glue doesn't dull them it just causes the blade to stick as if it is dull.
     
  9. F1wanabe

    F1wanabe Administrator

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    Before I used spray adhesive for the plan I used to take staples and press them into the parts so that the plan was relatively secure. For longer cuts, though, the plan can still pull with the blade to produce a part that's off by up to 1/4 inch or so. The nice thing is the mig 2.88 flies great even when pieces are off! It doesn't need to be precise in order to be a precise flier

    www.frcfoamies.com
    www.youtube.com/user/gstrysky
     
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  10. homey666

    homey666 Top Gun

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    I'm too lazy to clean the blades! I like f1's staple idea! Another day, another tip!

    Peter
     
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  11. pileit1

    pileit1 Ace Pilot

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    You can also take a hole punch and put some strategically placed holes around the pattern and then use small tabs of masking tape over the holes to hold the pattern in place. If you don't have a punch, you can use your razor knife to quickly cut small triangles instead, works just as well. Pins and staples can work loose.
     
  12. Flybyknight22

    Flybyknight22 Top Gun

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    Wing plate does not fit on a standard sheet of MPF so Instead of splitting it straight down the middle creating two long wing halves, I have decided to splice it at the nose.

    image.jpeg
     
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  13. F1wanabe

    F1wanabe Administrator

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  14. Flybyknight22

    Flybyknight22 Top Gun

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    F1,

    Yeah it seemed the best route to take.

    Lots to like about this plane.

    I saw you and Dave running a 3-blade prop on it.

    I liked that as it cuts down on torque roll.

    I found a 6x4.5x3 prop that is a little fatter than the Master Airscrew and might put out a bit more thrust.

    I plan to use the larger prop on the Mig 2.88

    I ran it up for a few minutes to check for vibrations or balance issues and found no problems with it like you see with the GWS props at higher RPMs but took no readings.

    The prop is very rigid with virtually no blade flex.

    I will be running some thrust measurements with it in a couple days to see what it can do.

    If it checks out I plan to use it on the Mig 2.88

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    Last edited: Jul 26, 2016
  15. pileit1

    pileit1 Ace Pilot

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    What I did was like you, splice it at the front end. I marked where it ran over the edge, and then glued a piece of foam onto the edge. When dry, cut the complete wing plate out as one piece.
     
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  16. F1wanabe

    F1wanabe Administrator

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    I love the Master Airscrews! Like you say, no flex and you can feel how well balanced they are. One drawback is that, because they are so rigid, they can shatter if you hit an obstruction. But, most props do! It should do really well for you on the 2.88!
     
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  17. That's the way I would have done it to.

     
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  18. Airflow

    Airflow Top Gun

    Yeah! I like the Master Airscrews 6x4-3 a lot on this one!
     
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  19. Flybyknight22

    Flybyknight22 Top Gun

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    Hmmmm, better do a dry fit before glueing.

    Left Elevons out of dry fit on purpose.

    Read through the thread but didn't really see a "cook book" step by step on how each of the parts go together.

    It's probably there and I just glanced over it (wouldn't be the first time) so this is what I tried first.

    I dry fitted wing plate and fuseslage.
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    Then centerline canopy/fuse support
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    Added fuse/canopy support pieces
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    Added canopy
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    OOPS,.. Missed the lower electronics bay support! Can't wedge that in now. Guess it needs to go in at or near the first dry fit step :)

    image.jpeg
     
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  20. Flybyknight22

    Flybyknight22 Top Gun

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    Did a motor mock up to see how well this new 6x4.5x3 Quad prop fits in there with the NTM 2200KV motor.

    Looks like it's gonna fit.


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