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Ziroli SBD-3 Dauntless build

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Old 08-03-2018, 03:33 PM
  #26  
BatteryBob
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Hi Folks, I'm still here and have been making some progress. I need to get caught up on posts. By the way, I did some closer looking at my SBD books and see the hinges. I was focused on the actuating arms and totally missed the hinges. Thanks for not embarrassing me.

I decided to move on an build the stab. I used the same servo approach that Sam used and I figured if I changed my mind, I could just close up the two servo pockets.
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Old 08-03-2018, 03:35 PM
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Old 08-03-2018, 03:44 PM
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I also finished the fuse and the center section up to the point where I needed to deal with other issues. One was the tail linkages - still a TBD. The other was to get the outer wing panels assembled to the point of tube alignment. I wanted to have access to the mating ribs so I could clamp, if necessary. I kept the end ribs straight be clamping hardwood to each.

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Old 08-03-2018, 04:01 PM
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I got a little diverted on another project. I bought a second FMS T28 and decided to finish and glass the plane in a similar color scheme that I did in Oracol. Photos show how that turned out. I still need to do the markings, but this was some good practice for the SBD. I chose to put in panel lines and rivets just for fun. I really didn't like the film version and stripped this down and repeated the covering process using a different color scheme. All this being said, I learned a bit more about spraying and other finish techniques that will come in handy. I still need to learn more about the spray gun, particularly if I need to work with latex paints.
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Old 08-03-2018, 04:16 PM
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The wing assembly was straight forward. I put in the same shear webbing out to the tip as Sam did. I found some of the ribs to fight back on alignment. In the past, I would have probably pinned the rib ends down in place, but after thinking more about this, it's only like constraining a spring, and it's only bound to relieve itself in a twist later on. So I prefer looser joint with parts that lie naturally aligned. I think I'm the last one to figure this out. (Hey, I'm not sure why these pictures are posting so huge. Let me know how to resize these - thanks)







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Old 09-30-2018, 10:30 PM
  #31  
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Basic framing completed and sheers added on both sides of the main spar.



Getting the flaps and brakes prep'd for the wings. Used the same approach that was used for the center flap. The Nelson hinge was scuffed and epoxied with a layer of 1/32" ply on top.




Rib placement was changed to the scale positions.


Sheeting added from main spar back.



Used Robart 3/4" 331 control horns attached to a ply base and set in epoxy against the main aileron spars.




G10 hinge points were added to the elevator and sandwiched between plywood. I did my best to get this set in epoxy and attached to the spars.

Beginning to layout the servo trays and hatches. I have seen more recent orientation of the servos on the side for the aileron servo. It's either this or going with way of a low profile servo as there is not much room toward the tip of the wing. I also moved the servo location out to mate with the control horn placement. A little closer to scale. I added to the wire tube.
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Old 10-01-2018, 09:29 AM
  #32  
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Beautiful job...and I LOVE the large pictures - very clear and these old eyes can see it!
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Old 10-01-2018, 10:02 PM
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I was concerned about how exposed R13 was sandwiched in between the flaps and aileron. I gave a good bump on one and noticed it was lose. That made me think that I should go ahead and add a thin layer of G10 to keep this straight and strong.


Another view of the reinforcement to the tail of R13.


Here is the bottom view of the wing showing the hinge points. I used a wire to align the points on the aileron. Then I used the same wire to mark the drill points on the wing side arms. I finally got all things line up before setting the respective pieces in 30 min epoxy and hardwood shims. All in all, I'm pleased with the movement. I still need to add in the TE cap. On the top side, I'll need to radius the LE of the aileron and also extend the TE of the wing a bit.
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Old 10-06-2018, 06:43 AM
  #34  
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A Great Build, enjoying your build. Agree with Chad, I learned "A LOT" from the guys here on RCU during my Charles Kellogg TBM Avenger Build (and still learning from these guys) and the guys on RCScalebuilder are just as informative. Keep up the great work. Chic
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