Post by Clayton on Sept 7, 2016 19:09:58 GMT
I have been away awhile; busy with other projects, raising a kid, work and life. But that doesn't mean that I am not interested in this. And I just took some time to read this thread, even though I noticed it awhile ago. This is good discussion, and entertaining at some times too!
I will share some of my experiences framing my model. I tend to like Fred's idea that parallel vs. tilted frames are a product of building method rather than saw technology; tilted in Dutch bottom first method vs. parallel in later construction methods.
I built my model in a way that was similar to how Vasa was originally built. Rather than bottom planking guiding the framing though, I set up bulkheads and strung lath between them to form a basis for where the outside edges of the frames should land. The frames ended up tilted naturally through this method; there was no need to taper width of the frames before I added them. In fact, I used a very precise tool to evenly thickness sand the width of all of the approximately 750 framing members. (The last time I was in Stockholm, I remember talking to Kroum about this number, and he told me this was quite close to the actual number)
My approximate framing plan, which shows the frames tilting at the ends of the ship towards amidships:
This is how the framing started (at around amidships) I purposely deviated a bit from actual construction methods. Instead of a floor timber going across the keel, I purposely made them split between the two sides, so that the two halves of the frame could land in slightly different places, as is reality in the real thing:
And the framing more progressed:
I gently clamped the frames to the lath as I added them so that I knew they would be in the right place while glue set. This picture shows a tilt, considering the bottom edge of the keel as the perpendicular angle to reference it from. I marked out the locations of the top timbers on the lath based on the old plans, but didn't care much if not all of them ended exactly within the marks.
In fact, many of the upper ends of the aft frames seemed to have tilted farther forward than the plans suggested.
One thing I might add is in addition to studying the angles of model gunports. In models we are talking about very small openings. Making a perfectly square port with edges parallel to anything is difficult, so angled sides, regardless of whether the frames are tilted or not, are going to happen.