user 116312
Member
- Joined
- Aug 20, 2020
- Messages
- 16
I don't have the wherewithall at the moment to build a Sonerai, so I built a virtual one using the plans I bought.
The model is done in Rhino7. (.3dm)
Each component is filed and the components are shown here in assembly files. The assembly files are very small as they have no geometry in them and are made up of the component files placed as blocks inside the assembly file.
The component files are layered by the materials used on each part.
All the components can be machined with the model as drawn. Everything will fit exactly.
The entire wing assembly is hole matched for riveting with the exception of the skin to ribs. The skin has pilot holes here and the ribs are drilled with the skins clecoed to the spars. The ribs are hole matched to the spars. The bend allowance for the rib fronts and rears is 5/64". The spars and ailerons are drawn to be done on a magnabend. The bend allowance depends on the machine and the material, and I usually define such things on the day. I then put in a hole either end of the material that serves as the witness mark for the bender to ensure the integrity of the hole matching.
As an aside, one of the real advantages of using Rhino, is that it is a surface modeller and so it enables hole matching even if the wing is distorted for washout.
The tubing is not booleaned in the files. That task is easier as an individual function (at the machine usually). The tubing is drawn as an extrusion (child) to a curve (parent). This enables the operator to change the length of any of the tubes individually. All the curves (lines mainly) have g0 functions between them ensuring that all the tubing is centred. The tubing can be unrolled to a 2D profile to be machined or printed to paper to wrap on the tubing for hand cutting the notches.
The model is done in Rhino7. (.3dm)
Each component is filed and the components are shown here in assembly files. The assembly files are very small as they have no geometry in them and are made up of the component files placed as blocks inside the assembly file.
The component files are layered by the materials used on each part.
All the components can be machined with the model as drawn. Everything will fit exactly.
The entire wing assembly is hole matched for riveting with the exception of the skin to ribs. The skin has pilot holes here and the ribs are drilled with the skins clecoed to the spars. The ribs are hole matched to the spars. The bend allowance for the rib fronts and rears is 5/64". The spars and ailerons are drawn to be done on a magnabend. The bend allowance depends on the machine and the material, and I usually define such things on the day. I then put in a hole either end of the material that serves as the witness mark for the bender to ensure the integrity of the hole matching.
As an aside, one of the real advantages of using Rhino, is that it is a surface modeller and so it enables hole matching even if the wing is distorted for washout.
The tubing is not booleaned in the files. That task is easier as an individual function (at the machine usually). The tubing is drawn as an extrusion (child) to a curve (parent). This enables the operator to change the length of any of the tubes individually. All the curves (lines mainly) have g0 functions between them ensuring that all the tubing is centred. The tubing can be unrolled to a 2D profile to be machined or printed to paper to wrap on the tubing for hand cutting the notches.
