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RE: BUSA 1/6th scale Sopwith Pup build. - 1/2/2013 1:26 AM   
GaryHarris



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Status: offline 		Use the YouTube box to the upper right and link it the same way you do pics.

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RE: BUSA 1/6th scale Sopwith Pup build. - 1/3/2013 5:39 AM   
lkruse


 

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Status: offline 		I was looking at the picture of your wing and remembered something I did with my plane that may or may not be helpful. I was bothered that the Solartex covering might have a tendency to bunch and pucker at each rib and TE juncture and make the whole thing pretty unsightly. To lesson that effect, I trimmed the aft end of each rib so that it was 1/16" thick and then laid in a 1/16" X 3/16" balsa strip at the back of the ribs, glued to the TE and to each rib. That allowed me to sand the TE to a nice straight taper, fairing the ribs into the TE, and still leaving the TE acceptably thick at the rear.

I've attached another shot of my plane that shows how the covering lays smoothly over the TE without that "starved horse" look you can get with the ribs all showing and puckered. Also, you might want to plan better than I did on the covering. If you look at the center section, you can see where I started a new roll of Solartex Olive Drab. Apparently Solartex is like yarn in that from roll to roll it is not an exact match. At 100 feet in the air, it doesn't show, but on the ground looking right at the top of the wing, I still grind my teeth for not planning better to cover the entire top wing with the same roll of covering. Any place else it probably wouldn't have made a difference.

I'm enjoying seeing your progress.

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< Message edited by lkruse -- 1/3/2013 5:54 PM >

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RE: BUSA 1/6th scale Sopwith Pup build. - 1/3/2013 8:47 PM   
Homer712


 

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Status: offline 		Larry, the idea of adding a top trailing edge to the wings is a great solution. I kept staring at them and wondering just how I was going to get the covering on and have it look smooth. Thanks!

Gary, you had said "wait until you get to the bottom center section." I'm there, and I guess this is where the whole "Balsa USA makes builders kits" thing really starts to kick in. For those of you following this build, I'll post a photo of the initial bottom center section directions straight from the instruction manual. I ran out of free hands somewhere halfway through the second sentence and decided to improvise. Took it one step/glue at a time and just hope that there's not something (I did read through this build section three times just to make sure) that I end up getting out of sequence with no way to fix things.

Instructions:




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RE: BUSA 1/6th scale Sopwith Pup build. - 1/3/2013 8:49 PM   
Homer712


 

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Status: offline 		Bottom Center Section Step 1:

 

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RE: BUSA 1/6th scale Sopwith Pup build. - 1/3/2013 8:50 PM   
Homer712


 

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Status: offline 		Bottom Center Section Step 2:

 

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RE: BUSA 1/6th scale Sopwith Pup build. - 1/3/2013 8:54 PM   
Homer712


 

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Status: offline 		Bottom Center Section Step 3: (OK, so I'm using wood glue and it says to "clamp" for thirty minutes, didn't sound like that long a time to hold the pieces together by hand, but as you see in the step after this, thirty minutes proved way too long a time for me)




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RE: BUSA 1/6th scale Sopwith Pup build. - 1/3/2013 8:56 PM   
Homer712


 

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Status: offline 		Bottom Center Section Step 4: (or how I really held the pieces together!)

 

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RE: BUSA 1/6th scale Sopwith Pup build. - 1/3/2013 9:02 PM   
Homer712


 

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Status: offline 		I'll finish up this section tonight and post a photo of the completed piece. And for those of you that need a "hobby plane" and think the one available at hobby stores/web sites is not quite professional enough . . . Lowe's, tool section, $7.98 plus tax.

 

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RE: BUSA 1/6th scale Sopwith Pup build. - 1/3/2013 11:02 PM   
GaryHarris



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Status: offline 		Unless we both did it wrong, I think your doing it right and a great job too. And yea it's a builders kit but not all that bad. I'm just glad I have planes to work on because this kit can be a tad taxing at times. Sometimes I just have to put it down for awhile.

I got all my electronics in for the toy Pup today, so I'm gonna play with that today.

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RE: BUSA 1/6th scale Sopwith Pup build. - 1/3/2013 11:43 PM   
GaryHarris



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Status: offline 		The motor is tad on the bigger side as well as the battery packs. They are 370 mah versus what they call for, 300 mah. 12 amp speed controller versus an 8 amper, two Hitec HS-55 servos, GWS RX on Futaba channel 46. Props are 8x6 slow fly.



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RE: BUSA 1/6th scale Sopwith Pup build. - 1/4/2013 2:00 AM   
Homer712


 

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Status: offline 		Gary, I have only one electric plane (out of seven) and that's an Eflite Eratix. Love to fly it on a warm, calm summer day. Enjoy!

Finished up the bottom center section, nothing left out, nothing to correct in the morning. Happy builder!

 Wood glue applied, aligning top spar with bottom spar:




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RE: BUSA 1/6th scale Sopwith Pup build. - 1/4/2013 2:02 AM   
Homer712


 

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Status: offline 		Making sure false rib fits between top and bottom spar, no gluing yet:

 

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RE: BUSA 1/6th scale Sopwith Pup build. - 1/4/2013 2:03 AM   
Homer712


 

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Status: offline 		Using both outboard ribs to set the gap between the top and bottom spars:

 

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RE: BUSA 1/6th scale Sopwith Pup build. - 1/4/2013 2:04 AM   
Homer712


 

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Status: offline 		Top spar glued in place:

 

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RE: BUSA 1/6th scale Sopwith Pup build. - 1/4/2013 2:07 AM   
Homer712


 

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Status: offline 		False ribs and wing dowel filler blocks installed, glued and sanded to shape:

 

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RE: BUSA 1/6th scale Sopwith Pup build. - 1/4/2013 2:09 AM   
Homer712


 

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Status: offline 		Bottom wing center section leading edge glued in place and drying. Done for the night.

 

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RE: BUSA 1/6th scale Sopwith Pup build. - 1/4/2013 2:23 AM   
GaryHarris



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Status: offline 		I haven't figured out why the instructions say it's so important to make sure those ribs are square, when they don't mention dihedral angles on the spars, LE and TE. I spent a spent a couple of hours on the lower wing trying to mate the main beams as good as I could and it came out with a few gaps between the wing panels and the center section. I tried to guess ahead and put a slight angle in the center section and if I had to do it again, I would leave them square and sand the panels to fit.

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RE: BUSA 1/6th scale Sopwith Pup build. - 1/4/2013 2:48 AM   
Homer712


 

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Status: offline 		Gary, I think you have the right idea on the center sections versus the left/right wing sections. The center sections need to remain square. It's the wing panels that need to be sanded to allow for the dihedral.

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RE: BUSA 1/6th scale Sopwith Pup build. - 1/5/2013 3:29 PM   
Homer712


 

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Status: offline 		Gary, when you get to the tail group section, pay particular attention to step 9 on page 24 where it says (in caps no less) "DO NOT round off any of the edges at this time." I got carried away when shaping the stab and ended up rounding off both the front and aft ends. Easy fix, but an unnecessary couple of steps added to the build process. 

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RE: BUSA 1/6th scale Sopwith Pup build. - 1/5/2013 3:43 PM   
GaryHarris



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Status: offline 		Looking good and thanks for the tip Homer. I'd like to get some work done on mine today but I need to do some sanding. Living in an apartment, I have to do my sanding outside and right now it is cold and raining. Maybe not as cold as where you are, but when the temp drops down to 43F, us Texas boys stay indoors.

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RE: BUSA 1/6th scale Sopwith Pup build. - 1/5/2013 8:57 PM   
Homer712


 

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Status: offline 		I'm sure some of you are going to get a laugh out of this, but . . . for years I've been cutting out hinge slots with an X-Acto blade. Doing hinges was a building task I learned to hate. Well, my last Tower order I finally broke down and spent the $10 for a Dubro slotting tool. Best $10 I've spent this building season! Never too old to learn something new.




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RE: BUSA 1/6th scale Sopwith Pup build. - 1/6/2013 2:07 AM   
Homer712


 

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Status: offline 		Stab and elevator, done! Even hinged. Figured I'd try my new Dubro tool on something (if I messed it up) I could fabricate from stick balsa.

 

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RE: BUSA 1/6th scale Sopwith Pup build. - 1/6/2013 2:30 AM   
Homer712


 

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Status: offline 		If there was one thing I'd change in the elevator design, it would be to have the parts be laminated (layered) like the trailing edge. Seemed to me that the one small glue joint between the elevator trailing edge and the large piece of balsa to the left, was a bit small. I ended up adding a small piece of spar to both sides to strengthen the joint.





< Message edited by Homer712 -- 1/6/2013 2:54 AM >

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RE: BUSA 1/6th scale Sopwith Pup build. - 1/6/2013 5:39 PM   
lkruse


 

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Status: offline 		If you feel flushed with money, spend a bit more for the Great Planes electric hinge slotter and you'll put the DuBro set in your cabinet.

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RE: BUSA 1/6th scale Sopwith Pup build. - 1/7/2013 2:11 AM   
Homer712


 

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Status: offline 		We have wings! Actually, the whole "joining" process went much better than I expected.






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