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Blog TrainingSphere - 6 - The frame

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Author Author: amgalbu
Date Created: 24 Jul 2015 11:25 AM Date Created
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TrainingSphere - 6 - The frame

amgalbu

24 Jul 2015

The frame is almost completed

I encountered more difficulties than I expected in assembly a structure using steel wires...

It's not very clear in these pictures, but there are three "parallels" corresponding to three "levels"

On the upper level, the raspberry and the accelerometerers will be mounted

The middle level will host the two engines and propellers

The bottom level will host the control surfaces

At the bottom of the sphere (so outside the sphere) I will place the battery and the two servos that move the control surfaces

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ravi_butani over 10 years ago

Nice frame...
CF tubes will be more better than steel... In terms of weight and durability too...
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balearicdynamics over 10 years ago in reply to ravi_butani

What do you intend as CF ? Carbon fiber ?
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ravi_butani over 10 years ago in reply to balearicdynamics

Yes carbon fibre... 3mm outer and 2 mm internal dia tube or even 2mm dia rod will best for banding to give circular shape..
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balearicdynamics over 10 years ago in reply to ravi_butani

Maybe, but with too much issues like: expensive, needs more complex nodes, less or identical flexibility. For a prototype this material is better. Also because this is a perimeter structure while - accordingly with the previous designs of Ambrogio - the core of the system is inside a tubular structure. So this is only for external shaping and protection. IMO
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balearicdynamics over 10 years ago in reply to ravi_butani

Maybe, but with too much issues like: expensive, needs more complex nodes, less or identical flexibility. For a prototype this material is better. Also because this is a perimeter structure while - accordingly with the previous designs of Ambrogio - the core of the system is inside a tubular structure. So this is only for external shaping and protection. IMO
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amgalbu over 10 years ago in reply to balearicdynamics

Yes enrico you are right. One of the results iis that the sphere can bounce thus protecting electronic components and propellers. AAs far as i know carbon fiber has limited elasticity. It's stiffer and lighter but in case of shock it cracks.
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