It is essentially a RC heli with thrust vectoring instead of a tail rotor.
Must haves: - Cyclic/collective pitch mixing (CCPM) - Thrust vectoring panels - Diameter 20-70cm - carry at least 200g payload (BeagleBoard + 1 or 2 cameras (one PT camera, one pointing down for visual stabilisation)) - The sphere casing. I love the idea of crashing with no/minimal damage (to the UAV or environment, including sentient protein blobs). Especially seeing as I want to heavily automate it.
I'd prefer to try without counter-rotating blades & just use thrust vectoring. If you advise against this, you are welcome to say "I told you so" if it fails :P
Budget: a few hundred $.
My questions to you, patient (and handsome) readers: 1) Should I start with a pre-built / kit heli? Or build from assorted parts? I have no experience building helis, but am willing to learn. I'm not in it for that side of the hobby though, so I don't mind buying pre-assembled. 1a) If so, what do you recommend? 2) What should I make the sphere out of? 3) Who wants to help? :P
Hope you make it open-source so that people in other hackerspaces can
get involved. (if you want, I'll happily set up a bitbucket
repository)
I think first step is to make the dxf files for the ektosceleton In
such a way they can be lasercut.
There would probably be a few engine configurations as I would go for
a gloplug fuel engine myself. But others would want electric. Maybe a
flexible engine mount idea.
Once there's a frame idea, I guess there's a few types of materials to
try, plastic, aluminium, carbon-fibre, plastic and foam..
Its a really interesting design challenge.
On 10/8/12, Brendan C / theban <brendancarmich...@gmail.com> wrote:
> It is essentially a RC heli with thrust vectoring instead of a tail rotor.
> Must haves:
> - Cyclic/collective pitch mixing (CCPM)
> - Thrust vectoring panels
> - Diameter 20-70cm
> - carry at least 200g payload (BeagleBoard + 1 or 2 cameras (one PT camera,
> one pointing down for visual stabilisation))
> - The sphere casing. I love the idea of crashing with no/minimal damage
> (to the UAV or environment, including sentient protein blobs). Especially
> seeing as I want to heavily automate it.
> I'd prefer to try without counter-rotating blades & just use thrust
> vectoring. If you advise against this, you are welcome to say "I told you
> so" if it fails :P
> Budget: a few hundred $.
> My questions to you, patient (and handsome) readers:
> 1) Should I start with a pre-built / kit heli? Or build from assorted
> parts? I have no experience building helis, but am willing to learn. I'm
> not in it for that side of the hobby though, so I don't mind buying
> pre-assembled.
> 1a) If so, what do you recommend?
> 2) What should I make the sphere out of?
> 3) Who wants to help? :P
> Thanks,
> theban / Brendan C
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> It is essentially a RC heli with thrust vectoring instead of a tail rotor.
> Must haves:
> - Cyclic/collective pitch mixing (CCPM)
> - Thrust vectoring panels
> - Diameter 20-70cm
> - carry at least 200g payload (BeagleBoard + 1 or 2 cameras (one PT camera,
> one pointing down for visual stabilisation))
> - The sphere casing. I love the idea of crashing with no/minimal damage
> (to the UAV or environment, including sentient protein blobs). Especially
> seeing as I want to heavily automate it.
> I'd prefer to try without counter-rotating blades & just use thrust
> vectoring. If you advise against this, you are welcome to say "I told you
> so" if it fails :P
> Budget: a few hundred $.
> My questions to you, patient (and handsome) readers:
> 1) Should I start with a pre-built / kit heli? Or build from assorted
> parts? I have no experience building helis, but am willing to learn. I'm
> not in it for that side of the hobby though, so I don't mind buying
> pre-assembled.
> 1a) If so, what do you recommend?
> 2) What should I make the sphere out of?
> 3) Who wants to help? :P
> Thanks,
> theban / Brendan C
> --
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> > It is essentially a RC heli with thrust vectoring instead of a tail
> rotor.
> > Must haves:
> > - Cyclic/collective pitch mixing (CCPM)
> > - Thrust vectoring panels
> > - Diameter 20-70cm
> > - carry at least 200g payload (BeagleBoard + 1 or 2 cameras (one PT
> camera,
> > one pointing down for visual stabilisation))
> > - The sphere casing. I love the idea of crashing with no/minimal damage
> > (to the UAV or environment, including sentient protein blobs).
> Especially
> > seeing as I want to heavily automate it.
> > I'd prefer to try without counter-rotating blades & just use thrust
> > vectoring. If you advise against this, you are welcome to say "I told
> you
> > so" if it fails :P
> > Budget: a few hundred $.
> > My questions to you, patient (and handsome) readers:
> > 1) Should I start with a pre-built / kit heli? Or build from assorted
> > parts? I have no experience building helis, but am willing to learn.
> I'm
> > not in it for that side of the hobby though, so I don't mind buying
> > pre-assembled.
> > 1a) If so, what do you recommend?
> > 2) What should I make the sphere out of?
> > 3) Who wants to help? :P
> > Thanks,
> > theban / Brendan C
> > --
> > You received this message because you are subscribed to the Google Groups
> > "hackerspace_brisbane" group.
> > To view this discussion on the web visit
> > https://groups.google.com/d/msg/hackerspace_brisbane/-/3DaLHWmuFXgJ.
> > To post to this group, send email to
> hackerspace_brisbane@googlegroups.com.
> > To unsubscribe from this group, send email to
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On Mon, Oct 8, 2012 at 6:25 PM, Lemming . <inert...@gmail.com> wrote:
> This guy has done a fair bit of work on one of these and is pretty happy to
> share his work.
>> > one pointing down for visual stabilisation))
>> > - The sphere casing. I love the idea of crashing with no/minimal damage
>> > (to the UAV or environment, including sentient protein blobs).
>> > Especially
>> > seeing as I want to heavily automate it.
>> > I'd prefer to try without counter-rotating blades & just use thrust
>> > vectoring. If you advise against this, you are welcome to say "I told
>> > you
>> > so" if it fails :P
>> > Budget: a few hundred $.
>> > My questions to you, patient (and handsome) readers:
>> > 1) Should I start with a pre-built / kit heli? Or build from assorted
>> > parts? I have no experience building helis, but am willing to learn.
>> > I'm
>> > not in it for that side of the hobby though, so I don't mind buying
>> > pre-assembled.
>> > 1a) If so, what do you recommend?
>> > 2) What should I make the sphere out of?
>> > 3) Who wants to help? :P
>> > Thanks,
>> > theban / Brendan C
>> > --
>> > You received this message because you are subscribed to the Google
>> > Groups
>> > "hackerspace_brisbane" group.
>> > To view this discussion on the web visit
>> > https://groups.google.com/d/msg/hackerspace_brisbane/-/3DaLHWmuFXgJ.
>> > To post to this group, send email to
>> > hackerspace_brisbane@googlegroups.com.
>> > To unsubscribe from this group, send email to
>> > hackerspace_brisbane+unsubscribe@googlegroups.com.
>> > For more options, visit this group at
>> > http://groups.google.com/group/hackerspace_brisbane?hl=en.
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* use off-the-shelf contra-rotating prop/motor combo from HK. eg:
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=17150 ( uses 2 8x4 props , 2 25A ESCs , and gives approx 700g thrust on a 3S
battery).
- avoids issues with needing to use huge flaps to counter engine torque.
- provides positive control of yaw by varying motor RPM differentially.
( again, needing smaller and lighter steering flaps )
* avoid CCPM entirely, it's just not needed. there's no value in having
a helicopter swashplate or any other complexities when the props are so
small. it's not like the ball will ever do 3D either ( ie it can't fly
upsidedown) . Control using RPM , differential RPM and steering flaps in
the airflow is complex enough already.
* everything else you suggested seeems plausible. eg: if 700g total
thrust, and 500g flying weight (inc battery), then 200g payload is
possible. depends on construction, but seems to me it's got to be *very*
light, and battery choice will be important.
* I think the sphere idea is cool too, but I want to put it on my quad. (
I fly like crap ) I was thinking of just using three or more "hoops" of
super-light carbon-fibre "springy rod" ( maybe 1 or 2mm dia).
Buzz.
On 8 October 2012 16:51, Brendan C / theban <brendancarmich...@gmail.com>wrote:
> It is essentially a RC heli with thrust vectoring instead of a tail rotor.
> Must haves:
> - Cyclic/collective pitch mixing (CCPM)
> - Thrust vectoring panels
> - Diameter 20-70cm
> - carry at least 200g payload (BeagleBoard + 1 or 2 cameras (one PT
> camera, one pointing down for visual stabilisation))
> - The sphere casing. I love the idea of crashing with no/minimal damage
> (to the UAV or environment, including sentient protein blobs). Especially
> seeing as I want to heavily automate it.
> I'd prefer to try without counter-rotating blades & just use thrust
> vectoring. If you advise against this, you are welcome to say "I told you
> so" if it fails :P
> Budget: a few hundred $.
> My questions to you, patient (and handsome) readers:
> 1) Should I start with a pre-built / kit heli? Or build from assorted
> parts? I have no experience building helis, but am willing to learn. I'm
> not in it for that side of the hobby though, so I don't mind buying
> pre-assembled.
> 1a) If so, what do you recommend?
> 2) What should I make the sphere out of?
> 3) Who wants to help? :P
> Thanks,
> theban / Brendan C
> --
> You received this message because you are subscribed to the Google Groups
> "hackerspace_brisbane" group.
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You can do the differential RPM control in ER9x easily enough. Just have
two output channels linked to the throttle input, and have left and right
on the rudder subtract from the throttle of one and add to the other, so as
to maintain the same total thrust but have a net total torque about Z.
With that contra-rotating arrangement from HK this looks almost trivial.
You'd probably still need a gyro to lock in the yaw, since your motors will
never run at exactly the same RPM.
On 8 October 2012 21:01, buzz <davidb...@gmail.com> wrote:
> * use off-the-shelf contra-rotating prop/motor combo from HK. eg:
> http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=17150 > ( uses 2 8x4 props , 2 25A ESCs , and gives approx 700g thrust on a 3S
> battery).
> - avoids issues with needing to use huge flaps to counter engine torque.
> - provides positive control of yaw by varying motor RPM differentially.
> ( again, needing smaller and lighter steering flaps )
> * avoid CCPM entirely, it's just not needed. there's no value in having
> a helicopter swashplate or any other complexities when the props are so
> small. it's not like the ball will ever do 3D either ( ie it can't fly
> upsidedown) . Control using RPM , differential RPM and steering flaps in
> the airflow is complex enough already.
> * everything else you suggested seeems plausible. eg: if 700g total
> thrust, and 500g flying weight (inc battery), then 200g payload is
> possible. depends on construction, but seems to me it's got to be *very*
> light, and battery choice will be important.
> * I think the sphere idea is cool too, but I want to put it on my quad.
> ( I fly like crap ) I was thinking of just using three or more "hoops" of
> super-light carbon-fibre "springy rod" ( maybe 1 or 2mm dia).
> Buzz.
> On 8 October 2012 16:51, Brendan C / theban <brendancarmich...@gmail.com>wrote:
>> Hello all,
>> I want to make something along the lines of this "japanese flying
>> sphere", circa July 2011:
>> It is essentially a RC heli with thrust vectoring instead of a tail rotor.
>> Must haves:
>> - Cyclic/collective pitch mixing (CCPM)
>> - Thrust vectoring panels
>> - Diameter 20-70cm
>> - carry at least 200g payload (BeagleBoard + 1 or 2 cameras (one PT
>> camera, one pointing down for visual stabilisation))
>> - The sphere casing. I love the idea of crashing with no/minimal damage
>> (to the UAV or environment, including sentient protein blobs). Especially
>> seeing as I want to heavily automate it.
>> I'd prefer to try without counter-rotating blades & just use thrust
>> vectoring. If you advise against this, you are welcome to say "I told you
>> so" if it fails :P
>> Budget: a few hundred $.
>> My questions to you, patient (and handsome) readers:
>> 1) Should I start with a pre-built / kit heli? Or build from assorted
>> parts? I have no experience building helis, but am willing to learn. I'm
>> not in it for that side of the hobby though, so I don't mind buying
>> pre-assembled.
>> 1a) If so, what do you recommend?
>> 2) What should I make the sphere out of?
>> 3) Who wants to help? :P
>> Thanks,
>> theban / Brendan C
>> --
>> You received this message because you are subscribed to the Google Groups
>> "hackerspace_brisbane" group.
>> To view this discussion on the web visit
>> https://groups.google.com/d/msg/hackerspace_brisbane/-/3DaLHWmuFXgJ.
>> To post to this group, send email to
>> hackerspace_brisbane@googlegroups.com.
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>> hackerspace_brisbane+unsubscribe@googlegroups.com.
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Basically, what they are saying is that it's a droid-ball fitted with a
speaker that calls instructions to
a person to help them exit a burning or earthquake damaged building.
