FRCFOAMIES F/A-18 Hornet

Discussion in 'FRCFoamies Plans' started by Boxermad84, Mar 8, 2014.

  1. F1wanabe

    F1wanabe Administrator

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    Tom, nice of you to do that!
     
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  2. TomMonton

    TomMonton Administrator

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    The whole package, a stable radio, telemetry, any of the RCP/FRC builds and sunny day

    .. it just warms the heart.

    :) Besides .. we got a new bird to get in the air here.
     
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  3. CeeKay

    CeeKay Ace Pilot

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    Tom, you're a star!

    I've uploaded the file to my Tx and everything is working as it should. Just got to wait for a break in the wonderful Northern Irish weather in order to get the maiden flight in.
     
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  4. CeeKay

    CeeKay Ace Pilot

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    Word of the day - WHOOPS!

    Spent yesterday afternoon getting everything set up before the hornet went into the paintshop and was doing some bench running to check the throws and power etc when disaster struck. The model jumped the cradle which allowed the prop to strike, shear a blade and continue to dislodge the motor. The result was that the single rotating prop blade tore through the back of the model and completely destroyed the tailplane. Never mind, a bit of careful cutting out the damage and I'm ready to remake the broken parts.

    Top tip: Don't trust your model cradle to hold a depron model which is pumping out 572W of power!! :(


    On another note, I think I may have over-propped it a little bit.
    Aerodrive SK3 - 2836-2500kv on 3s with a 7x6 APC Pulls 56A and gives 572W.
    I might revert back to the tried and tested D2826-6 2200kv with a 6x4.

    Thoughts?
     
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  5. Airflow

    Airflow Top Gun

    Load the TGY2200kv motor with a 4s battery, + 6x4 APC or EMP/TGS 6x3E. you will get 39-40 oz of thrust. maximum of 28 amps. :)
     
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  6. F1wanabe

    F1wanabe Administrator

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    I was flying it just fine through testing on the MJV3 (23 oz thrust) and only upgraded to the heads up zoom 400 on the current version. Both flew great! So, a 6x4 should be plenty for you, CeeKay!
     
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  7. TomMonton

    TomMonton Administrator

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    Ouch. ... at least it was just foam, but it does create a bunch of unnecessary work.

    A had a bird want to take off on me that way and i instinctively reached for it. Cut me a good one on the back of my hand. I still have the marks yet a couple years later. Those plastic blades are surprisingly sharp.

    I've been waiting a flight report. . Or did i miss it?
     
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  8. CeeKay

    CeeKay Ace Pilot

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    You haven't missed the flight report. I had a few days of waiting for parts to arrive and then I decided to fill all the fold lines to give a more scale appearance.

    I'll be a few days making the repairs and then I'm back to work after 10wks off so the maiden might have to wait for a bit!
     
  9. CeeKay

    CeeKay Ace Pilot

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    Fitted the 2200kv and a 6x4 prop. On 3s, 21.6A and 243W.
    I'll try this setup for the intial flight with the 4s in reserve.

    Model is in the paintshop now after I rebuilt the back end. Hopefully get it airborne this weekend if the weather allows.
     
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  10. Airflow

    Airflow Top Gun

    Nice! CeeKay
    Post a video please
    Good luck!
     
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  11. CeeKay

    CeeKay Ace Pilot

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    Maidened the Hornet last night. Flew very well indeed. Unfortunately, no video as I was there alone (must buy a head camera). No nasty vices although I do need to adjust the cg a little for the next flight.

    Time to finish the painting and get some proper airtime with this great model.
     
    Last edited: Sep 12, 2014
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  12. CeeKay

    CeeKay Ace Pilot

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    Disaster!
    Well, ok, just a little bit of a setback.
    Managed to get the CG sorted and was putting the Hornet through its paces last night when due to an error on flap-elevator compensation, it piled in, destroying the nose section.

    With the flight mode set to aileron and elevator, I had excellent manoeuvrability but when set to elevons only, I had very little roll control (it would bank but not roll).
    I had massive amounts of throw on the elevons so I'm quite confused.

    I'm going to repair the model and at the same time build another to relocate some of the components and make some other improvements that I thought of after I had completed the first build.

    Any suggestions as to the poor roll control?
     
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  13. F1wanabe

    F1wanabe Administrator

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    CeeKay, this plane has no thrust vectoring since the motor is mounted on back. The main reason elevon only is possible on these parkjets it that the tv adds enough airflow over the smaller control surface to give them the torque to roll the plane. Without tv you won't have good response especially flying slow. So, on planes with rear mounted motors ailerons are a must!

    www.youtube.com/gstrysky
    www.frcfoamies.com
     
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  14. CeeKay

    CeeKay Ace Pilot

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    That makes sense then. I was going to do away with the elevon mode on the rebuild anyway. Thanks.
     
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  15. F1wanabe

    F1wanabe Administrator

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    There is nothing wrong with elevator /ailerons! On this plane with the motor between the elevons it is easier to use 2 servos and 2 servos lends itself to using elevon mix, so I do elevons for the little extra roll. But elevator adds stability!

    www.youtube.com/gstrysky
    www.frcfoamies.com
     
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  16. RCUrso

    RCUrso Ace Pilot

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    Greg, is already available the pdf file for this little beauty?
     
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  17. Boxermad84

    Boxermad84 Administrator

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    You can find the plans on our website www.frcfoamies.com


    Sent from my SM-N9005 using Tapatalk
     
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  18. BarryM

    BarryM Ace Pilot

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    Has anyone used a KF2 airfoil on the F18? I browsed through the post but can't find any mention of it..
     
  19. RCUrso

    RCUrso Ace Pilot

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    Not yet, Barry.
     
  20. F1wanabe

    F1wanabe Administrator

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    Hello Barry! No one has used any airfoils to my knowledge since we have designed it to look extremely scale. The leading edge slats I added to mine give the same feel as a kf2,though, but with a little more precise feel. Feel free to be the first!
     
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