Su-30 V4 “Hovering Parkjet”

Discussion in 'Scratchbuilding!' started by RCPowers, May 15, 2014.

  1. Thelic

    Thelic Ace Pilot

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    I've already cut down these by about 1". They seemed really far back compared to the scale drawings so I just cut back the hinged portion.

    I need a good method to attach hinges, so far I've just been using packing tape.
     
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  2. bogusbandit56

    bogusbandit56 Top Gun

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    I use dry wall tape, it a fibre glass matrix tape with uhu por you could use foam tac . I cut the dry wall tape the length of the hinge and then divide it`s width into two and glue it on top of the hinge. Then turn the plane over and cut six pieces of tape about an inch long fold the elevon back on it`s self and glue the DWT equidistant , one on each end and one in the middle. Put some talcum powder on the hinge to stop it sticking when dry. I have never had on fail doing it this way. another good use for the DWT is reinforcing the score folds in the nacelles.
     
    Last edited: Sep 26, 2015
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  3. Thelic

    Thelic Ace Pilot

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    Still waiting for the spackle to cure...Decided to pretty up my T-50 in progress too...

    I have some drywall tape, so your saying apply the foam tack into the voids of the tape?
     
  4. bogusbandit56

    bogusbandit56 Top Gun

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    Some people do as I have, but on my last build to save weight and glue I smeared uhu por on the control surface where the tape was going to be placed and just applied the tape. I then put some glue on a piece of foam and smeared it over the DW Tape but not completely filling up the voids in the matrix. In the Uk the tape comes with adhesive on it, I should it is the same in US and Canada?
     
  5. Thelic

    Thelic Ace Pilot

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    Yea, its actually quite sticky!
     
  6. Thelic

    Thelic Ace Pilot

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    Progress report.
    IMG_1530.JPG IMG_1531.JPG IMG_1532.JPG
     
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  7. Thelic

    Thelic Ace Pilot

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    My Fiancée wants me to cut the tail boom off! GASP! (its magnetic anyhow)
     
  8. DavePowers

    DavePowers Administrator

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    Really cool mods man! Looks very simple and scale.
     
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  9. Thelic

    Thelic Ace Pilot

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    Yes, very simple with the lightweight spackle. I hope it keeps most of the flight characteristics of the base model though.
     
  10. Thelic

    Thelic Ace Pilot

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    I think I'm going to sandwich the hinge tape in between the wing plate and a piece I'm going to add to give depth to the engine. Should also help to stiffen the wing plate behind the prop, that always seems to want to flap around when I build with dollar store foam.

    I'm a little concerned with having so much in the prop wash. Did it effect any of the other models in the past? F-35 V2 I'm looking at you!

    165g so far.
     
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  11. Thelic

    Thelic Ace Pilot

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    One last sanding to go, just a few little imperfections to fix and then paint. I added the hinges to the control surfaces and the electronics bay by sanding down the foam and building it back up with a layer of tape/gorilla glue and then a coat of spackle. Seems really strong, way better than I was doing before.

    196g (6.95oz) unpainted.

    IMG_1534.JPG
     

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  12. bogusbandit56

    bogusbandit56 Top Gun

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    They look really great but careful how you go with all the enhancements. Every gram of tail weight needs 3 grams on the nose, so becarefull not to run out of battery space to get the right CoG.
    Why does`nt your fiance like like the tail boom?
     
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  13. DavePowers

    DavePowers Administrator

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    Wow man, very smooth!
     
  14. Thelic

    Thelic Ace Pilot

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    I don't think ill have too much trouble with CoG, I did a fair bit of work forward of it as well as have a 2200mAh battery. Seems to balance so far. Removing the canards also shifts the center of pressure rearwards which should help.

    Can you believe she thought it looked funny? I tried to explain its purpose, but to no avail.
     
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  15. Thelic

    Thelic Ace Pilot

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    Needs some paint touch ups, and some metallic for the tops of the engines, but not bad.

    IMG_20151001_165220_hdr.jpg
     
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  16. F1wanabe

    F1wanabe Administrator

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    Bogus, remember that the SU30 is geared for slow flying and hover, so the large control surfaces will give a lot of control when airflow over them is low. Cutting them down will result in less slow speed control. If you're flying fast, then cutting them down would not be an issue.
     
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  17. F1wanabe

    F1wanabe Administrator

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    Thelic, looks very very nice!!! Looking forward to an frc SU in the near future too.
     
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  18. F1wanabe

    F1wanabe Administrator

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    That looks really good, homey! Yellow always works for me. Beautiful!
     
  19. Thelic

    Thelic Ace Pilot

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    This Sukhoi kick isn't about to stop!
     
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  20. F1wanabe

    F1wanabe Administrator

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    So thats the SU35 variant there which I kinda of prefer to the su37 for high speed aerobatics. Smoother directional changes without canards, and less fuss to! CG can go back further without canards!
     
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