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  1. #151
    invertmast's Avatar
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    RE: Another...Yellow Twin F-18 build

    ORIGINAL: NickC5FE

    OOOOOOOH THOMAS.....the way you make it sound, i may not even sart the glassing process on my foam wings....;-).. How would you incorporate the wing spars to peoples planes that already have the bulkheads/receivers installed??? Please dont tell me i would have to grind that s#it out!!
    The front spar would either need a "bend" in it, or would have to incorporate a forward spar (b/c of the leading edge flaps). I think a "shorty" would be best and easiest, as with a carbon laminated balsa/spruce forward spar you could put the necessary bend into the spar, then laminate carbon on both sides of the spar (overall 2 pieces, then a piece of carbon cloth in the skin). Then make a "box" spar that goes from the full span of each wing panel and the "bend" about 1/4 to 1/2" behind the leading edge flap seam line (there would need to be 2 "oval" shaped cutouts in the forward box spar for the leading edge flap linkage, but they wouldn't be very large, and i personally dont think would hurt the structural integrety at all). Then have a shorty aluminum spar (that uses G-10 sheets as a spacer) glued in between this forward box spar. The rear spar would be the same but the box portion wouldn't extend the full span of the wing panel. it would only go about as far as the aluminum receiver goes.
    Using the G-10 spacers would allow enough adjustment for those who already have built airframes to fine tune the new wing panels to fit their particular bulkheads..

    Make sense?
    Thomas W.
    Euro-sport Evo, Scratch built 1/7 F-14D Tomcat, 26.5% Gee Bee R2

  2. #152
    NickC5FE's Avatar
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    RE: Another...Yellow Twin F-18 build

    yep.....
    I Fly FREDex
    The C-5M Super Galaxy project

  3. #153
    WhoDaMan's Avatar
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    RE: Another...Yellow Twin F-18 build

    Thomas,,,, you should do the elevators to

    Dave
    Doesn\'\'t \"expecting the unexpected\"
    Make the unexpected expected?

  4. #154
    invertmast's Avatar
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    RE: Another...Yellow Twin F-18 build


    ORIGINAL: WhoDaMan

    Thomas,,,, you should do the elevators to

    Dave
    Dave,
    it would be the whole she-bang.. Wings, stabs/elevators, fins/rudders.. everything that is sheeted foam core now would become composite. How's the 2 seater coming?
    Thomas W.
    Euro-sport Evo, Scratch built 1/7 F-14D Tomcat, 26.5% Gee Bee R2

  5. #155
    WhoDaMan's Avatar
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    RE: Another...Yellow Twin F-18 build

    Hi T:
    That is a great idea, I guess when Hudson gets that Crusader done which is coming together nicely he will get back on the twin seater

    Dave
    Doesn\'\'t \"expecting the unexpected\"
    Make the unexpected expected?

  6. #156
    NickC5FE's Avatar
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    RE: Another...Yellow Twin F-18 build

    i just realized that my thread is #4 on the heartbeat.....is RCU that slow today??? geez
    I Fly FREDex
    The C-5M Super Galaxy project

  7. #157
    invertmast's Avatar
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    RE: Another...Yellow Twin F-18 build


    ORIGINAL: NickC5FE

    i just realized that my thread is #4 on the heartbeat.....is RCU that slow today??? geez
    noo.. your just that popular! lol
    Thomas W.
    Euro-sport Evo, Scratch built 1/7 F-14D Tomcat, 26.5% Gee Bee R2

  8. #158
    YellowAircraft's Avatar
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    RE: Another...Yellow Twin F-18 build


    ORIGINAL: invertmast

    I'll give charles a call on monday

    Is that just cuz it's fashionable to pay full price for your jet gear?
    Yellow Aircraft, JetCat Engines and Turn Key Jets
    yellowaircraftplanesdotcom

  9. #159
    NickC5FE's Avatar
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    RE: Another...Yellow Twin F-18 build

    Your funny bro!!

    Well all progress will cme to a standstill today, i am getting alerted to go fly in an hour or so.....I will get back to work when i return!
    I Fly FREDex
    The C-5M Super Galaxy project

  10. #160
    invertmast's Avatar
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    RE: Another...Yellow Twin F-18 build


    ORIGINAL: YellowAircraft


    ORIGINAL: invertmast

    I'll give charles a call on monday

    Is that just cuz it's fashionable to pay full price for your jet gear?
    I was just gonna call to get a quote.. i'll buy the stuff from you
    Thomas W.
    Euro-sport Evo, Scratch built 1/7 F-14D Tomcat, 26.5% Gee Bee R2

  11. #161
    NickC5FE's Avatar
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    RE: Another...Yellow Twin F-18 build

    OK Guys n Gals, what are you all using on your controls for horns?? In the instruction it says that they need to be a max of 5/8 inch....Well Robart has the nice metal ball link horns but they are only 1/2 inch....seems to be a lil on the short side?? If you have pictures of your horn style and placement, i would appreciate it! thanks, Nick
    I Fly FREDex
    The C-5M Super Galaxy project

  12. #162

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    RE: Another...Yellow Twin F-18 build

    Nick,

    I'll have to dig up some pics, but I used a BVM carbon fiber control horn and machined it down to shape.

    I placed some hardwood blocks in the control surface with enough space between them so that the horn would fit. Then, hysol the horns in.

    Jeff

  13. #163
    NickC5FE's Avatar
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    RE: Another...Yellow Twin F-18 build

    thanks Jeff!!
    I Fly FREDex
    The C-5M Super Galaxy project

  14. #164
    invertmast's Avatar
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    RE: Another...Yellow Twin F-18 build

    Nick,
    i used the 1/2" (aileron) and 3/4" (flaps) robart "super-ball" horns w/ the aluminum ball.
    Thomas W.
    Euro-sport Evo, Scratch built 1/7 F-14D Tomcat, 26.5% Gee Bee R2

  15. #165
    NickC5FE's Avatar
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    RE: Another...Yellow Twin F-18 build

    Thanks Thomas!!! will order asap!
    I Fly FREDex
    The C-5M Super Galaxy project

  16. #166
    invertmast's Avatar
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    RE: Another...Yellow Twin F-18 build

    Before you do that! If i were to do it again, i would use the Hinges that YA uses on their "arf's" shaun @ YA can get them for you. I believe he "may" be able to get a crude drawing of how they did their gap covers, etc as well. you'll have to check with him on that though.
    Thomas W.
    Euro-sport Evo, Scratch built 1/7 F-14D Tomcat, 26.5% Gee Bee R2

  17. #167

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    RE: Another...Yellow Twin F-18 build

    Nick, I have a set of the hinges that Thomas refers to. I am not using mine. If you want them, they are yours for the asking.


    Jeff

  18. #168
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    RE: Another...Yellow Twin F-18 build

    Nickers! You're an animal man! I love hornets! I read through this thread but I didn't see what engine you wanna use. P-200?

    Raf
    RAVjets Demo Team. All We Do Is Fly.

  19. #169
    NickC5FE's Avatar
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    RE: Another...Yellow Twin F-18 build

    Ok guys- got a question.....

    I am setting up my linkages (trial run) and i have decided to go with 1/2 inch robart ball link horns, 4/40 threaded one-end rods wth carbon over the length of the rod. In looking at it, it doesnt look like i have enough clearance on the servo cover to allow for good movement of the servo in the current config, (and that is with the clevis on the outermost hole of the HD arm). Any ideas??? Did you all just cut more of the cover, did you use the outermost hole?? I am not a fan. You are kind of limited, especially on the ailerons, to the height of the horn you use because of the aileron linkage cover. .....Pix would be appreciated of your setup...Thanks in advance-Nick
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    I Fly FREDex
    The C-5M Super Galaxy project

  20. #170
    NickC5FE's Avatar
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    RE: Another...Yellow Twin F-18 build

    Raf- yeah, i am looking into the possiblity of a p-200............
    I Fly FREDex
    The C-5M Super Galaxy project

  21. #171
    YellowAircraft's Avatar
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    RE: Another...Yellow Twin F-18 build

    Nick,

    What servo? Take comfort in the fact that you need next to no throw on the ailerons on that thing...
    Yellow Aircraft, JetCat Engines and Turn Key Jets
    yellowaircraftplanesdotcom

  22. #172
    invertmast's Avatar
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    RE: Another...Yellow Twin F-18 build

    Nick,
    I had hitec 5645MG's in mine and using the metal servo arms, i had about 1/2" between the outer horn and the servo hatch cover. I Also had the servo's mounted to the hatch cover using some large maple blocks hysol'd to the cover.
    Thomas W.
    Euro-sport Evo, Scratch built 1/7 F-14D Tomcat, 26.5% Gee Bee R2

  23. #173
    NickC5FE's Avatar
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    RE: Another...Yellow Twin F-18 build

    Thomas, that is what i have my servos mounted like, as per instructions. I was going to use 2721 or 8411, andi have the small HD arms on the servo...I have no where near 1/2 inch between the hole and the cover.....
    I Fly FREDex
    The C-5M Super Galaxy project

  24. #174
    invertmast's Avatar
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    RE: Another...Yellow Twin F-18 build

    In your picture it looks like the clevis is on the cover already... Only suggestion i have is maybe a longer servo arm? How long is the arm you have right now? 1" or so?
    Thomas W.
    Euro-sport Evo, Scratch built 1/7 F-14D Tomcat, 26.5% Gee Bee R2

  25. #175
    NickC5FE's Avatar
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    RE: Another...Yellow Twin F-18 build

    Thomas, it is the smallest of the HD JR arms.....like 1/2 inch i believe. I was trying to keep the moment short so there would be no worry of flutter later. The clevis is almost touching the cover already!! I guess by followingthe instructions, i may have screwed myself, had i put the servo on the cover so the arm was to the rear, i would be able to get more mechanical advantage, but i did it the way the book told me to. HUH? Guess i will just get a longer arm ;-(
    I Fly FREDex
    The C-5M Super Galaxy project


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