View Single Post
  #22 (permalink)  
Old 08-21-2008, 09:15 AM
scon10 scon10 is offline
Member
 
Join Date: Jul 2007
Posts: 92
Three steps to show you today.
First, as I mentioned earlier, it is easier to determine the seam of each engine cilinder in order to correctly position the associated bulkhead in the correct position. This is essential because of the complex, assymetrical shape of these bulkheads. (Moderator, how can I place pics within the text, so that pic and text are correlated? Now, they end up all at the end of my reply. Thanks.)


Next, I have glued an actual photo of a jet engine front onto the front bulkheads parts B31 and B37, so that when you look inside the engine intake, you will see compressor blades and the central spinner. For that, I needed to place these bulkheads perpendicular to the direction of flight (DoF), so that you don't get a perspective distortion when looking inside. The plane of the engine intakes makes an angle of around 25 degrees with the DoF, so I needed to sand these bulkheads down a bit, making them a bit more circular. Actually, I would have needed to reshape the intake interior part 28/39, but I had already glued them in place...
I hope that the pic makes this clear.

Finally, the engine parts are ready for assembly. For this step, I attached partial glue strips on top and bottom of the engine cilinders 31/42 and 36/47, which must fit over the main spar bulkheads B43 and B44. These will form the connection to the engine central parts 32/34, 43/45 and the cooresponding ones at the bottom.
Also, you will notice that I always cut out half lips in the center of each bulkhead and fold them outwards, so that I have a grip on these bulkheads.
That's it for now, so long.
Attached Images
File Type: jpg bulkhead positioning in engine cilinders.jpg (139.8 KB, 26 views)
File Type: jpg left inboard engine construction.jpg (156.8 KB, 38 views)
File Type: jpg left inboard engine with glue strips.jpg (125.1 KB, 47 views)
Reply With Quote