Wednesday, October 9, 2013

Pitot solid model

Preliminary design phase is exciting as challenging phase of every project, different solutions should be evaluated and eventually one should be selected.

So called virtual prototyping techs have been used for decades by now and are of proven efficiency in the preliminary design phases, virtual prototype for 8 mm pitot is shown on following video, just below another example of virtual prototype render.

Video P13.1 Animation of pitot model file

Figure P13.1 Render of flange virtual prototype
Referring to a medium DIY size project and setting the goal of global cost reduction it's quite common to observe that virtual prototyping is the right tool also for the home DIY maker projects.

Correlated effects of a massive use of virtual prototyping include the possibility to archive, search, modify and share your project at best.

The base technique that is used in virtual prototyping is solid modelling.

Solid models can speed up work and rise the overall accuracy level. A solid model can give precise information, among others, about weight, center of mass and inertia. When flying platforms are involved it's often necessary to have such information to feed simulators or as foundation for control related tasks or if you plan to use telemetry data for aerodynamics parameters identification.

If it's needed to know if you new instrument will withstand to a particular airspeed you can at least attain an envelope figure of structural limits by using your solid model and a free FEM code as Elmer.

The selection of static ports location problem can be effectively treated, with CFD is possible to evaluate different locations and check sensibility to angle of attack or sideslip.

Leaving apart the poetic of flight testing to build a physical prototype and test it, by far slower and expensive than virtual prototyping. As shown by those simple examples also in DIY cases virtual prototyping mean efficiency and cost reduction.

I heard that sometimes the creative process is hindered by to continuously have to draw every new sub-part so for the 8 mm pitot you can find the .stl 3D model file here.

This model is ready to be incorporated in your project, only material personalization is needed.
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