[Moon] Calculating the foundation for a dish mount

[Conrad PA5Y]

It is time for me to start preparing things for a dish mount for a 5m dish. I would like to properly calculate the foundation requirements, it seems to me that people guess here and usually use too much concrete. I would like to have proper calculations and hope that someone can help me. I may use ground screws and so it will really help me to calculate the requirements for a concrete foundation.

I have the Wind load calculator from OK1DFC and even though my dish is a mesh dish I will calculate for a solid dish. I have seen Jet Propulsion Lab data that from memory suggests that above 50mph or 80km/h the turbulence around the mesh looks similar to a solid dish. I cannot find the article but I do remember seeing it! So I will calculate for a solid dish.

At 160km/h the on axis wind load is 33.3kN

If I understand correctly force on the mount is in N/m? So the mount is 3.5m tall so the torque is 116.6kN/m - then I get stuck because I do not know how to translate this into the forces on the foundation.

Can anyone help?

Pointers to papers to read perhaps?

73

Conrad PA5Y