Is an M shaped airframe design possible?
If weight was mainly centred and the only weight on the arms were the wires to the Motors would am M shaped frame be possible? There would likely be some flex in the lower (in the diagram) arms and maybe a brace back to the centre would be needed parallel to the bottom of the centre board but I wonder if anyone has actually done this?
Replies to This Discussion
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Permalink Reply by Jake Stew on -
If the frame is rigid enough it doesn't matter how retarded the design is.
The "M" design would be much weaker and weigh more than a standard design, but no real reason you couldn't do it. If you're looking for poor performance there's easier ways though.
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Permalink Reply by doodlewhale on -
Thanks for your reply. Maybe I should have explained the reasons for such a 'retardation' but thought that unnecessary given the simple and direct question. I agree the weight may have to increase due to the joint at the the top two rotors having to be structurally sound and having to balance that added structure at the bottom rotors. I was just curious if anyone had experimented with this sort of design? Maybe I am the first, and the last! Degradation in performance is not a desired outcome, is this something you specialize in?
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DeveloperPermalink Reply by John Arne Birkeland on -
A more common design and easier to make rigid would be the H frame.
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Permalink Reply by doodlewhale on
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Ahaa! John, I could not see the wood for the trees! Of course, the H frame would be a perfect solution to achieving what I am setting out to do which is essentially to have as much free space between the arms going all the way back to the centre board.
*Yes I feel suitably silly*
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Permalink Reply by David Monks on -
Why would you feel suitably silly, asking "stupid" questions is the heart of science.
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Permalink Reply by Roman Zil on
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Engineering is the application of science ;) And doesn't engineering require a lot of experimentation anyway?
P.S. I am just trolling the forum to understand what to do with all my raw materials I just got delivered :)
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ModeratorPermalink Reply by Carl Campbell on -
There is a saying in the SCA that goes something like this; It is a science, If you drop something on your foot and it hurts the object is a science. Art if you drop something on your foot and it does not hurt it is an art.
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Permalink Reply by criro1999 on -
See below my H-frame, maybe this help.
It is flying well and is stable. The rigidity is the key fro the frame, I did need to add one more layer of balsa and now is strong.
http://www.diydrones.com/forum/topics/h-frame-quad-for-10-weight-1k...
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