Concept Quadcopter with retractable landing gear.

Concept Quadcopter with retractable landing gear.

I've been working on this idea for the last 2-3 weeks, and if all goes well, I’ll start
the machining the parts soon for the 1st proto frame.


* 100% carbon fiber material in all body parts

* Retractable landing gear from Transmitter (maybe if possible with the use of sonar, auto
retractable or deployment if distance from ground > 2m)

* Foldable arms for easy transport in a Heavy Duty Case

* Main Body from molded Carbon Fiber sheet ( not yet implemented in renders )..

* Heavy Lifter (if possible 1 or 1,5 kg )

It well be a real challenge for me because this is my 1st DIY project .

When I well have the full frame tested, I’ll post all building instructions and Acad files
, if somebody is interested in making this frame for their personal use .

Views: 8831

Comment by John Ryan on September 25, 2010 at 1:13pm
You are a talented designer.

A few weeks ago I watched a video of a quad thats got a claw-like appendage added underneath the body that doubles as landing struts, but it really struggled to get off the ground! So the first question that pops to my mind is; what would be the extra cost+weight to benefit ratio be? eg. it's landing gear, and it retracts, but isn't that typically a design feature of planes and gliders that rely on reducing drag to maximize flight time an duration?

A lot of people seem to be building Quads with search and rescue applications in mind. I think that's a great application of this technology, but I also think practicality has a strong relationship with the amount of time it can stay in flight, and so reducing the overall weight might be more valuable than increasing it, especially if there is little or no obvious benefit to adding extra weight in the first place.

I'd like to see someone solve the problem of the propellers presenting such a danger to anyone unfortunate enough to come into contact with them - like people who might be in need of rescue. I've got a fresh scar on my left hand, 2 inches long, from an unfortunate misadventure with a new set of CF props I was messing with so I know how dangerous these things can be. If that problem can be solved without adding too much weight then these machines might be a little bit more safer, and as such.. a little bit more feasible to use for general purpose applications (like search and rescue) where human contact might occur either on purpose or by accident.

Anyway... nice work! - I like your eye for detail and your inventive spirit.
Comment by Dan Sibisan on September 25, 2010 at 1:52pm
Thanks John
You are right, the retractable landing gear it’s a bit overkill for the total weight of the quad (+200/300g), but I’m not really after 100% performance, its more for looking good and eye caching, I plan to use it in winter sports aerial photography and similar tasks .
I could make the quad at half the weight that well actually be, but its nor really what I’m after.
Regarding propeller safety, they are many concepts that prevent users for getting their fingers cut of.

Comment by John Ryan on September 25, 2010 at 2:08pm
It will definitely be "eye caching" = )

I've seen those designs too but it's still very easy for fingers and hands to be clipped by the props. They are "safer" but reading the latest thread about the UK CAA restrictions on UAS's it's pretty clear these measures are still inadequate to lessen the perceived danger these craft to the general public.

A completely encapsulated design would be awesome and also incredibly eye catching - something like that might even change the perceived danger of these craft and allow them to return to the domain of private hobby craft for the entertainment and enjoyment of people of all ages without the need for expensive CAA permits and permissions.

The fewer reasons the CAA's have got to call them dangerous, the better it will be for everyone (everywhere not just the UK), and I know the prop danger is only one of many perceived dangers, but solving that would present "one less" for CAA's to consider.

Comment by John Church on September 25, 2010 at 2:20pm
How about implementing capacitive sensing on a set of CF props to brake the motors when coming into contact with our "victim"? It seems to have good results on tablesaws...
Comment by Dan Sibisan on September 25, 2010 at 2:27pm
I`m not sure the response from that is quick enof to stop the motor before making the damage.
Comment by John Ryan on September 25, 2010 at 2:27pm
That's an interesting idea John and frankly I'm surprised no one's thought to do that yet.

But I'd still like to see a completely encapsulated design, lightweight and unquestionably safe for all ages. If people can't see the props they won't feel threatened by them, nor will they need to understand the concept of capacitive sensing brakes which is a really nice idea = )
Comment by John Ryan on September 25, 2010 at 2:43pm
In fact (and I don't mean to sound like an uber-geek) I think the design I've got in mind might resemble the Millennium Falcon, but black, sleek, and undetectable to CAA radars (if there's such a thing).

And with retractable landing gear too Dan, and maybe a storage bay for dropping off supplies to anyone in need of rescue?

The area around the props would need to pass air freely but look encapsulated.

How's that for an impossible challenge = )
Comment by Dan Sibisan on September 25, 2010 at 2:55pm

:)) if this is your ideas of a encapsulated quad, buy the time we are to build something like this for hobby use , the propellers would be obsolete for at less 100 years , so I think the encapsulated body for a quad remains an impossible task .

Comment by John Church on September 25, 2010 at 3:58pm
Sure, there's a possibility of damage/injury even with capacitive sensing, but at least we could minimize the mangling :) Like I said, it's proven in an industrial setting. I'd like to see it implemented natively in the ESC for ultimate timely response.

Comment by John Church on September 25, 2010 at 5:43pm
Anyway, sorry to take your thread off-topic Dan. If you can keep the mechanism weight down, it's definitely something I'd go for! Nice drawings, too, by the way. REALLY interested in getting a look at your molded body concept... You've got some modeling ahead!


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