"
Hi,
Here is a source for pre-made Polyurethane envelopes and motors. I use the 1/3 oz motors on my 6 ft blimp.
Look here
"
narwhal's Discussions
Simulator for Lighter Than Air
Started Nov 2, 2011 0 Replies 0 Likes
I'm developing an autopilot for lighter than air aircraft, and it's getting annoying to test it in a hall every time I make a change, so I was thinking of using a simulator. Does anyone know of a…Continue
Polyurethane
Started this discussion. Last reply by gadgetfan2 May 23. 1 Reply 0 Likes
Can anyone recommend a polyurethane supplier that can supply the kind of PU needed to make blimp envelopes?
UHF Radio and Transponders
Started Jan 25, 2011 0 Replies 0 Likes
Does anyone here use UHF/VHF Radios and/or transponders that regular aircraft use to alert control towers to there presence?If so how does one do it with Arduino?Continue
Blimp Motors
Started Jan 20, 2011 0 Replies 0 Likes
I am wondering whether anyone can recommend a specification of motors to properly manueveure a 66" blimp filled with helium? Ideally they should be light weight and have a low current draw, but I…Continue
narwhal's Page
Latest Activity
narwhal commented on Chris Anderson's blog post Remember SPOT? It's still around and can be used for sat comms!"Do you know if Iridium have something similar? (And preferably duplex)"
narwhal commented on Edwin Hayes's blog post PhD Scholarship Offering - Machine Vision UAS Navigation"Could I get more information?"
narwhal commented on mohammed's blog post controling via sat"Satellite modems can be tiny, but size isn't the issue, expensive satellite networks are"
narwhal commented on Chris Anderson's blog post Follow the progress of the Wave Glider UUVs on Google Earth"How will they be transmitting data back from across the ocean?"
narwhal posted a discussionSimulator for Lighter Than Air
I'm developing an autopilot for lighter than air aircraft, and it's getting annoying to test it in a hall every time I make a change, so I was thinking of using a simulator. Does anyone know of a simulator that let's me specify the buoyancy of aircraft? (Even being able to dynamically specify weight would be good if they accepted that negative weight would bring the aircraft into the air)See More
narwhal commented on narwhal's blog post Dynamic Density Airship Concept"The wings are simply fold away, they don't represent the amount of buoyant force displaced. If you look closely (although I'll admit the video doesn't display this as well as it could have) the envelope itself is changing shape by…"
ModeratorEllison Chan commented on narwhal's blog post Dynamic Density Airship Concept
"Hmm, you do realize that without a place to put the displaced air, your motors will have to be continuously running, and the amount of change in buoyancy will probably be as much as much force that your motors can put out, which is relatively…"
narwhal commented on narwhal's blog post Dynamic Density Airship Concept"The volume alteration is done by changing the shape of the envelope using nylon string and some internal motors. The envelope material is currently mylar and polyurethane combined together, but I might strengthen that with further testing."
Mike commented on narwhal's blog post Dynamic Density Airship Concept"When the race to balloon across the Atlantic was at its peak some years ago my friend was running the physics for an attempt using a balloon with a similar idea. The balloon density was altered with an inner balloon which was inflated or deflated as…"
ModeratorEllison Chan commented on narwhal's blog post Dynamic Density Airship Concept
"How did you plan to do the volume alteration feat? Air compression?"
narwhal posted a blog postDynamic Density Airship Concept
This is an airship I designed for the UAVForge competition, it takes advantage of its ability to alter its volume (and thus its density) to take off and land. It is 6 ft long, however folds down into a rucksack. Some interesting technology I am looking at in terms of software is the Surface From Motion 3D environment estimationhttp://ai.stanford.edu/~asaxena/reconstruction3d/…See More
narwhal commented on Toby Mills's blog post What is the maximum range of an Xbee? - Lets find out..."I might suggest that the 10 km limit you found was simply the distance to the horizon:
http://en.wikipedia.org/wiki/Horizon#Distance_to_the_horizon
This would also explain why it quickly dropped off in signal strength rather than gradually."
narwhal commented on pixhawk's blog post QGroundControl v1.0.0 and MAVLink v1.0.0 Releases closing in"The 3D maps view in the interface, is that using Google Earth?"
narwhal replied to Sean Skirvin's discussion $100,000 Darpa UAV Contest"I am entering this contest, it took me a while to design a UAV that would fit the specs properly but I feel like I have come up with a good design, although how well it works in practice I won't know until deliverable 2. I am currently talking…"
narwhal commented on Hai Tran's blog post Irresponsible FPV flights"I am a private pilot, and I am more into the lighter than air side of RC flying, but I find all this hysteria surrounding FPV ridiculous. Unless the RC model is operating in airspace frequently used by aircraft (such as an airstrip) or over a high…"
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Narwhal's Blog
Dynamic Density Airship Concept
Posted on October 24, 2011 at 5:00am 5 Comments 1 Like
This is an airship I designed for the UAVForge competition, it takes advantage of its ability to alter its volume (and thus its density) to take off and land. It is 6 ft long, however folds down into a rucksack.
Some interesting technology I am looking at in terms of software is the Surface From Motion 3D environment…
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