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Thread: STYRKORO S27


  1. #1
    microsprint9's Avatar
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    STYRKORO S27

    Well here's my second attempt at a SPAD, it's the STYRKORO S27. I loved my parkzone f27 so much and have designed many foamies around the basic shape of the stryker, then i bought a glow motor and since then i have been neglecting my electrics. This has got to be one of the easiest builds i have done, then plane is 90% finished, only some paint and vinyl to make it look like a stryker. My first spad was this same plane without the nose, it was basically a flying wing and flew very good with a 40LA but it was tail heavy so i decided to move the motor forward and use the stock shape of the stryker, i guess i moved the motor too far forward, i needed 5oz of lead in the tail to balance it. I have drawn this plane in cad so if anyone is interested i will post a file. I hope to maiden it next week if the wind dies down a bit. Here are the specs.

    Wingspan 44"
    Wing Area 580 sq/in including elevons
    Wing Load 16.8 oz/sqft
    Weight 4.25lbs
    Engine OS 40LA
    Prop 10x7
    Radio Hitec Optic 6
    Receiver Electron 6
    Servos HS-325HB 3 needed ( 2-elevons, 1-throttle )

    Here are some pictures up to now
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  2. #2

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    RE: STYRKORO S27

    I like the design of your Strykoro. Is this made with a single piece of 4mm or do you double 2 pieces of coro with the flutes perpendicular like the BullDawg? I would like to see how you mount the servos, measurements, CG, or Drawings. Did you use anything to stiffen up the wings like carbon rod, or BBQ skewers? It looks very similar to the CoroRoo, found at http://www.spadcombat.com

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    RE: STYRKORO S27

    Have you seen the coro-roo? It is very similar in design. I watched a video of one and with the right engine and prop these things are very fast.

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    microsprint9's Avatar
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    RE: STYRKORO S27

    Sorry i forgot to mention in my first post that it is just a 6mm pc of coroplast and 2-1/2 x 2-1/2 pvc downspout. I did epoxy a 3/16 dowel in the wing, if you look closely in the one of the pictures you can see it. My prototype was basically the same and it was quite fast with the 40LA, the wings did start to flutter a bit on fast level passes but i'm sure with some leading edge stiffening and maybe some more of those bbq skewers you could make this thing extemely fast. Late yesterday i mounted the elevon and throttle servos and did some painting, going back to my shop right now to finish it off. I'll post some more pictures later on. It might look like the coro-roo, but this plane is 100% built around my first plane, the parkzone f27 Stryker. http://www.horizonhobby.com/Products...ProdID=PKZ1200

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    microsprint9's Avatar
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    RE: STYRKORO S27

    Back from the shop, WOW, what a difference paint makes, it's also nice to have a vinyl cutter. All servos are zip tied in place and the CG should be 9"-10" from the back flat part of the wing which is same as my stock stryker, just scaled up. Plane is 95% finished now, only throttle linkage and hooking up the radio gear to go, i might also make a front cowl for looks, but this is simple plastic aircraft design, a cowl will probably be a little bit of work and not so simple. Once i have maidened the plane and exacted the CG i will post plans for all to enjoy. Here's some pictures up to now.
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    microsprint9's Avatar
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    RE: STYRKORO S27

    A few more.
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    RE: STYRKORO S27

    Alright, with those pictures you convinced me that I really want to build one of these. It's going to compliment my CoroRoo quite nicely I think. I'm interested in the drawings that you have.

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    RE: STYRKORO S27

    Great looking ship with an awesome paint and graphics job!

    Looking forward to seeing the plans!

    Blue skies,

    DL

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    RE: STYRKORO S27

    Microsprint9:
    Great idea and nice job on the plane! You mentioned only 3 servos (elevons + throttle). Does this mean your nose gear is not steerable?

    SS

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    RE: STYRKORO S27

    looks god, great paiont job. perhaps you may want to consider putting clear tape over the leading edge, it should make it fly nicer.
    great job,
    looking, waiting for flight report.
    regards
    james

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    RE: STYRKORO S27

    Thnaks for the complimements, i got to fly it last night. I don't have a runway but i wanted gear on the plane to save the prop on landing, so i made the nose gear solid. The first flight went alright, but hand launching this plane was not the best idea, i nosed it in a few times, but on my last try i got it up in the air, i think i still need some more weight in the rear, so the CG will be 9-9-1/2" from the back flat part of the wing. I will draw up some plans today and post them. I think next time i fly her i'll find a runway to takeoff from, and make the nose gear steerable.

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    RE: STYRKORO S27

    Since you got it flying, do you think that a .46BB would be overkill on this plane? I have a Sickle with a 40la on it, but I also have an Evo 46NT sitting on a low winger and I since the Sickle flies so great I am starting to have a deeper interest in flying wings.

  13. #13
    microsprint9's Avatar
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    RE: STYRKORO S27

    I found the 40La seemed to have more power in the prototype, but it also weighed 10-12oz less, i think a good .32 would keep some of the weight off the nose and allow for less lead to be used in the tail. I think a 46bb could be used but you might want to scale the plans up a bit to lower the wing loading. Plans will be posted very shortly.

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    microsprint9's Avatar
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    RE: STYRKORO S27

    Okay here we go. In drawing 1 layout all the dimensions onto a sheet of 6mm coroplast and cut out. The tail fins are giving me a problem to post so they can be printed to scale, please e-mail me and i will send you a printable .jpg file that will work on a legal size sheet, or on a 8-1/2" x 11" and just improvise the rest, i used 1/2" quarter round to attach these to the wing, triangle would also work. In Drawing 2 cut out fuse from 2-1/2" x 2-1/2" PVC downspout, i used a pc with sides cut down to 1/2" for the hatch. Drawing 3 is the graphics, not sure if the picture is usable to you guys but it will give some reference. Everything was assembled with ZAP CA and zip ties were used for attaching servos, battery and reciever. I used a 3/4" thick pc of ply for the motor mount bulkhead, since this was my first attempt at landing gear i'll leave that one up to you. CG is between 9" and 9-1/2" from the middle flat part of the back of the wing forward. Enjoy, and if you need anymore details please let me know.

    Wayne Vanderweyst
    microsprint9@hotmail.com
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    RE: STYRKORO S27

    Very nice set of plans thanks.
    Jeff

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    RE: STYRKORO S27

    I'm bumping this topic, started cutting out the wing this morning, and wanted to come back here for reference. Thanks for the drawings, they are great!

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    RE: STYRKORO S27

    I'm glad to see this thread moving again...what a great idea. I'll be looking forward to some pictures, especially some in flight (hint hint...)

  18. #18
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    RE: STYRKORO S27


    ORIGINAL: FantzyPantz

    I'm bumping this topic, started cutting out the wing this morning, and wanted to come back here for reference. Thanks for the drawings, they are great!
    I have built the sickle and love it. Everyone at the field begs me to let them fly it and so now I really want another flying wing in my hangar.

    I have a TT pro 46 with a Tower muffler and I had looked at the CoroRoo but the Styrkoro us pretty sharp and has peaked my interes. So anyone building one of these be sure to post details and pics so I can learn from your mistakes and steal your ideas!
    \"Courage is being scared to death...and saddling up anyway.\"---John Wayne

    Roll Tide Roll!!!!

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    RE: STYRKORO S27

    I got my wing cut out. I didn't have 6mm coro, so I put 2 pieces of 4mm together with the flutes running perpendicular (See BullDawg build). I cut the elevons with a dremel since the coro runs perpendicular. This is the 1st time I have tried cutting the control surfaces this way, but so far I think I'll have a solid hinge. I have PVC gutter, but I'm thinking about forming a coro fuse to compensate for the (Probably nominal) weight gain used in doubling the 4mm. I'll post a pic.
    I'm not sure if I'll put landing gear on this or not. Right now I'm thinking of hand launch with a landing skid for dead stick landing. More later.

  20. #20
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    RE: STYRKORO S27

    This looks like a great project ! It reminds of a Balsa USA Enforcer. What are the throws. Also what are the dimensions on the rudder. I may try this one in my spare time. Thanks
    If you fail to plan, then your planning to fail....

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    microsprint9's Avatar
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    RE: STYRKORO S27

    Sorry it's been a while since i posted, unfortunalely my la40 just didn't have enough power to fly this plane the way i wanted, i did just order a TT pro .46 so i might try that. FantzyPantz, when i cut my elevons i broke through in a few spots so i just added a layer of clear duct tape to make sure they stayed on, as for the 6mm to 2 pcs. of 4mm the weight differecnce is only .22oz/sq-ft with 6mm weighing 4.34 oz/sq-ft and 4mm weighing 2.28 oz/sq-ft. Dead eyes- just e-mail me and i will send you a file that you should be able to print out for the vertical stabilizers, as for the throws, i would say at least 1" up and down to whatever you can handle. So my strykoro is on the backburner now, but wait til you see the 8' B2 bomber i'm working on, i have already built a 4' e-powered mock up and it flies great, now 200% and glow power.

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    RE: STYRKORO S27

    Hi

    I make foamy version yours STYRKORO S 27
    Wingspan 110 cm
    Weight 1100 g dry
    Engine MVVS 2,5 ccm
    First flight went good but MVVS is too weak Tomorrow i will fly with OS 25.
    Hand lounching is very good.
    This is very nice idea .Thanks
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  23. #23
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    RE: STYRKORO S27

    mgb1,

    Welcome to the forum! Great looking planes! How did you anchor the motor mount in the foam?

    Blue skies,

    DL

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    RE: STYRKORO S27

    Thanks for compliment.Foam is 3 cm - styrodur
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  25. #25

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    RE: STYRKORO S27

    That's one way to do it. You could also just use 1/4" aircraft plywood and mount the engine directly to the plywood. Use polyurathane glue to hold the plywood to the foam. Make sure to add water to your glue joint to insure that the glue will double expand. I put a 25 lb. weight on the plywood when gluing.
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    Thanks,
    Wayne H.
    Tokay R/C Modelers
    Delta Valley R/C Modelers


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