Ver 0.01a

A project log for Mona Lisa ParaFoil

A lightweight compact fabric/stiffer material Parafoil underslung is a raspberry pi for control and camera feed. See notes this has evolved

slncioSlncio 03/05/2017 at 15:170 Comments

So It's advance a fair bit but I'm not sure I'm going to get it done in time as life rather got in the way as it were. But no worries I have made some good progress which I will pop in the pics as soon as I can get them to upload.....

Ver 0.01a is still in alpha for sure and it has a long way to go so I'm unlikely to make the deadline and get it flyable but I will try still. The project has morphed into creating the templating for the next version and a card proof of concept. Which will now try to explain.

I have created black cardboard folded wings which ideally be morphing by the use of a mechanism. This will allow me to test the best aerofoil sections for performance. Currently there inst much of an angle on the wings which wasn't my original intention. However this is now going to be a test bed for rapid prototyping of my finalised design. So new cardboard wings will be added and amended as needed.

Central to this is the power source. What I will call the aerocore (tm pending lol). This is to be a solid box structure containing a crazyFlie which will pivot around the central axis. The wings will attatch to this box and there will be minmal other structure around the box other than a leading edge and a trainling elevator/alerons. See below. This will give a vtol effect and should (if my non existent maths are correct) give me a convertible hybrid VTOL. If all doesn't go to plan and my engines aren't powerful enough then The central aerocore can be swapped out for a different power source. My inspiration was the upcoming XTI tricoper/VTOL and the project Zero aircraft. The central aerocore will pivot round in it's entirety but also have a hover craft like control for vectoring the resultant thrust and giving it a measure of control in the horizontal plane. This may be supplemented by rudders on the vertical stabilisers with mini servos for control or other control methods such as bleed air or puffer motors on the trailing edges of the wings. This is in the tail sitter configuration. Hat tip to one of my friends who is an aero engineer for that one. This should supplement the quad copters control in a vertical tail sitter configuration.

In a traditional VTOL configuration with the QUAD locked in the horizontal plane. Puffer motors might give useful control also however this will be discovered as and when it flies. Another route would be to use bleed air from the central aero cores power however I'm not at all sure if that would work reliably on this scale. Again this would be one of the attempted configurations. This may require a thicker wing in order to accommodate the ducting (straws!).

Other wing materials will be studied however card at the moment offers me the easiest and quickest route to form both the wing structure and the central aerocore box structure. The key to this will be the initial design which has flexibility, crashability and rapid re-configurability inherent in it. Simple cheap design with good expansion for the future as my skills and knowledge expand.

This has been a great experience in learning and research for me as I am trying to apply rapid software design methodology and spirit to designing hardware of which I have little experience. Thanks.