Vought F4U Corsair 1/12 ACES AIr-Combat

Home Forum 3DLabGANG projects Vought F4U Corsair 1/12 ACES AIr-Combat

Viewing 11 posts - 16 through 26 (of 26 total)
  • Author
    Posts
  • #61963
    AvatarBurton Hooker
    Participant

    What is everyone using to hold the cowl on? I tried some small 2-56 screws but it was a real pain in the but to get them lined up every time I took off the cowl. This past time the screw hole split on the layer. Currently I’m planning on just gluing on the cowl like I did with the motor mount on my Spitfire MK XVI rather than risk the screws de-laminating layers.

    #62097
    Avatarszekerpapa
    Participant

    @Burton Hooker:

    Did you use the tail assembly from Thingiverse, which I uploaded (szeker)?

    If so, sorry not to have a proper description there, that some part of the servo wire guiding channel should be removed from the last section of the fuselage – to have enough room for the control wire bending/flexing by following the elevator control horn. Moving the control horn back in the design would lead to even more bending of the servo wire.

    I used fabric hinges, but as I found them too rigid, I trimmed the width of them down after gluing. Also, I used only two hinges on each elevator.
    Anyhow, I’ll update the description @Thingiverse.

    #62265
    AvatarBurton Hooker
    Participant

    I didn’t see that until after I had already built the tail on this one. I wish I saw the modification to keep the wing from sliding around before I had finished the plane as well. The next one I print will have both options. I found that once I switched to hinges I could just barely make the +/- 9mm movement the instructions called for.

    #64395
    AvatarBurton Hooker
    Participant

    So we tried to maiden fly the F4U this past weekend. Unfortunately we had some issues that lead to crashes. Fortunately nothing too serious and it will be easy to fix. So here’s what I learned from those attempts:

    1) The motor is not angled and off-set to compensate for the motor’s torque. So torque roll is going to be somewhat of a problem. Hopefully someone comes up with a new motor mount to fix the issue.
    2) To get the proper CG on the plane the battery needs to be all the way forward in the nose. The designed mounting position doesn’t work unless you add weight.
    3) Glue the rubber band holder into the fuselage.
    4) The wing needs to have something hold it in place on the back side to prevent it from sliding side to side and sliding back.

    #297451
    AvatarBurton Hooker
    Participant

    Just a FYI…the recommended 700kv motor for this plane needs a higher amp then what 3dLabPrint usually recommends. 3dLabPrint recommends a 25amp ESC for the combat setup on the Spitfire MK XIV with the 620kv motor and 6s battery pack. I was using a 40amp ESC with the 700kv motor and a 6s battery and the ESC kept failing at 3/4ths throttle and above. I have a couple of 80amp ESCs on the way so hopefully I’ll have my friend’s F-4U and my P-51 flying in a few days with the new ESCs.

    #351354
    AvatarBurton Hooker
    Participant

    Well it wasn’t the amps the motor was pulling that is the problem…I bought an 80 amp ESC and tried that and still have the same problem with the motor stalling out and squealing at 90% throttle. We tested the amp draw and found out it is only pulling 29 amps. I’ve tried all the suggestions I could find for troubleshooting my ESCs and nothing has worked. Both of the Racestar motors I bought are having the same problem…I’m starting to think the motors themselves are just no good.

    #451791
    AvatarBurton Hooker
    Participant

    Been having problems posting to the forum lately so some of my updates haven’t been posted. As it turns out I figured out how to fix the issue…the 9×7.5 and 9.6 props I had been trying are too much for the motor to turn. 9×6 was pulling 29 amps and it looks like the motor specs out at about 22 amps. I tried the recommended 9.5 prop and that too is too much for the motor. I ended up with a 9×4.5 prop with the startup speed on the ESC set to “plane middle”. I haven’t yet had a chance to fly the plane so I don’t know if it is going to be able to keep up with the nitro planes with that much smaller of a prop. At any rate I’ve come to the conclusion that the Racerstar 3508 700kv motor is just a crappy motor. I have found what too me looks like a motor as good as the 3dLabPrint recommended AX-4008-620KV motor but unfortunately it is nearly twice the cost…I think I’m just going to have to bite the bullet and start buying more expensive motors 🙁

    #488924
    AvatarBurton Hooker
    Participant

    I think I found a better motor…I have a couple on order and am waiting for them to arrive. But the stats on it are a lot closer to the original AX motor that 3dLabPrint reccomends:

    #488951
    AvatarBurton Hooker
    Participant

    The motor is the DYS BE4215 650Kv

    #732566
    AvatarBurton Hooker
    Participant

    I was finally able to test out the DYS motor last weekend in my P-51. I’m happy to say this is a great motor! I now have one in the F-4U and hopefully will be testing that plane out this weekend. As for the P-51 it flew almost exactly the same as it did with the AX motor that is recommended by 3DLabPrint. It’s a great motor.

    #765347
    AvatarBurton Hooker
    Participant
Viewing 11 posts - 16 through 26 (of 26 total)
  • You must be logged in to reply to this topic.