RCU Forums - View Single Post - Top Flite B-25 - Wingspan Models Add-ons Build Thread
Old 07-07-2008, 04:51 PM
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RCKen
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Default RE: Top Flite B-25 - Wingspan Models Add-ons Build Thread

With the bottom disk prepared it’s time to start building the cylinder. The body, or walls, of the cylinder are constructed out of the long piece of 1/64” light ply. This will be glued to the edge of the bottom disk to form the cylinder. Start out by tacking on edge of the ply strip to the outer edge of TTI; make sure that the edge of the ply is flush with the bottom of the disk. Make sure to wait for the CA to completely dry on this first tack before moving. Now work around the disk and attach the ply strip to the edge of TT1. I found it was easier to work about an inch at a time. Put down a bead of CA and then line up the ply on TTI and hold in place until the CA sets. Keep working around the cylinder. But don’t go all the way around, leave about 1”-2” from the end of the strip unglued for right now. As you can see in picture #5 the edges of the ply strip overlap. I had test fit the strip and had thought that they did line up. But it was difficult to really hold that strip in place around the disk and in the end I wound up with about 1/16” overlap as can be seen in the picture. To correct this I had to cut off that portion that overlapped. This is why I say to stop gluing before you get to the end of the strip, this will give you enough room to place the strip on a cutting surface and cut off the portion that overlaps. Once the end of the strip ends butted up to the beginning spot go ahead and use medium CA to finish gluing it to the edge of TT1. When I had the entire strip glued around the edge of TT1 I went ahead and ran a bead of CA around the joint inside of the cylinder to add a little extra strength. Although, in hindsight I really didn’t need to do this step.


Pictures
1. Parts needed for this step.
2. Start by tacking one end in place.
3. Let CA set before continuing.
4. Work around the disk using CA to glue the strip in place.
5. Overlap at end of strip.
6. With overlap removed strip fits properly on the disk.
7. Another view of finished strip.
8. Run a bead of CA around the bottom of the strip inside of the cylinder.
9. Completed strip in place.
10. Completed strip in place.
11. Bottom view of cylinder with light ply strip installed.

Until next time

Ken
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