Public Lab Wiki documentation

Revisions for Helium Kite

3 CURRENT	mathew	September 20, 2012 19:53 \| about 12 years ago (copied from GrassrootsMapping Wiki) Prototype a helium-filled kite that flies in low wind but does not drop due to wind: See this Ram Sled for a possible design: swap out the rammed air cylinders for helium? Black Knight 1 At WhereCamp 2010 at Google Mountain View, a few of us built a prototype helium kite from a single 99 gallon trash bag. (JeffreyWarren, DanLyke, ReidBeels, and a few more) See photo gallery here: Flickr photos of Black Knight 1 Goals made from a single 99-gallon trash bag minimal extra bits needed; packing tape, duct tape, 2 key rings, string, scissors flies in light winds Lessons learned the connection of the side reservoirs to the center line (belly) burst immediately; it really needs to be an order of magnitude stronger should add 4 bridle points instead of 2 so we can adjust the angle of attack in flight tests. Ours didn't climb enough. make it bigger, or out of thinner plastic: we used 2.7 mil and it was a little less than neutral buoyancy. Black Knight 1.1 Suggestion: try making 2 cylinders of helium that are reinforced and sealed with rings of tape. Then connect them with a membrane. NathanCooke, OliverYeh, and JeffreyWarren prototyped some small balloon kites using a plastic bag welder from MIT's D-Lab. See photos on Flickr here We used 2.7 mil plastic with the welder set to 5.5. Triple seams were tough - like in 3d where three lines meet, which is how the old Black Knight design worked. Suggestion: try just sealing horizontally instead of doing a complex joint. We also tried just sealing a bag closed, then welding lines down the middle, so we use the bag as-is, water-tight, but create pontoons. Easier to show in a picture than explain in text, so here: Flight tests: Kite / Balloon Hybrid History Domina Jalbert (of the parafoil fame) experimented with these under the name "Kytoon". They generally seem to be teardrop-shaped balloons with kite-style wings. Here's a reprint from an old Popular Mechanics article. Also see the "Helikite": Helikite on YouTube	Revert
2	warren	April 21, 2012 15:14 \| over 12 years ago (copied from GrassrootsMapping Wiki) Prototype a helium-filled kite that flies in low wind but does not drop due to wind: See this Ram Sled for a possible design: swap out the rammed air cylinders for helium? Black Knight 1 At WhereCamp 2010 at Google Mountain View, a few of us built a prototype helium kite from a single 99 gallon trash bag. (JeffreyWarren, DanLyke, ReidBeels, and a few more) See photo gallery here: Flickr photos of Black Knight 1 Goals made from a single 99-gallon trash bag minimal extra bits needed; packing tape, duct tape, 2 key rings, string, scissors flies in light winds Lessons learned the connection of the side reservoirs to the center line (belly) burst immediately; it really needs to be an order of magnitude stronger should add 4 bridle points instead of 2 so we can adjust the angle of attack in flight tests. Ours didn't climb enough. make it bigger, or out of thinner plastic: we used 2.7 mil and it was a little less than neutral buoyancy. Black Knight 1.1 Suggestion: try making 2 cylinders of helium that are reinforced and sealed with rings of tape. Then connect them with a membrane. NathanCooke, OliverYeh, and JeffreyWarren prototyped some small balloon kites using a plastic bag welder from MIT's D-Lab. See photos on Flickr here We used 2.7 mil plastic with the welder set to 5.5. Triple seams were tough - like in 3d where three lines meet, which is how the old Black Knight design worked. Suggestion: try just sealing horizontally instead of doing a complex joint. We also tried just sealing a bag closed, then welding lines down the middle, so we use the bag as-is, water-tight, but create pontoons. Easier to show in a picture than explain in text, so here: Flight tests: Kite / Balloon Hybrid History Domina Jalbert (of the parafoil fame) experimented with these under the name "Kytoon". They generally seem to be teardrop-shaped balloons with kite-style wings. Here's a reprint from an old Popular Mechanics article. Also see the "Helikite": Helikite on YouTube	Revert
1	warren	April 21, 2012 14:47 \| over 12 years ago (copied from GrassrootsMapping Wiki) Prototype a helium-filled kite that flies in low wind but does not drop due to wind: See this Ram Sled for a possible design: swap out the rammed air cylinders for helium? Black Knight 1 At WhereCamp 2010 at Google Mountain View, a few of us built a prototype helium kite from a single 99 gallon trash bag. (JeffreyWarren, DanLyke, ReidBeels, and a few more) See photo gallery here: Flickr photos of Black Knight 1 Goals made from a single 99-gallon trash bag minimal extra bits needed; packing tape, duct tape, 2 key rings, string, scissors flies in light winds Lessons learned the connection of the side reservoirs to the center line (belly) burst immediately; it really needs to be an order of magnitude stronger should add 4 bridle points instead of 2 so we can adjust the angle of attack in flight tests. Ours didn't climb enough. make it bigger, or out of thinner plastic: we used 2.7 mil and it was a little less than neutral buoyancy. Black Knight 1.1 Suggestion: try making 2 cylinders of helium that are reinforced and sealed with rings of tape. Then connect them with a membrane. NathanCooke, OliverYeh, and JeffreyWarren prototyped some small balloon kites using a plastic bag welder from MIT's D-Lab. See photos on Flickr here We used 2.7 mil plastic with the welder set to 5.5. Triple seams were tough - like in 3d where three lines meet, which is how the old Black Knight design worked. Suggestion: try just sealing horizontally instead of doing a complex joint. We also tried just sealing a bag closed, then welding lines down the middle, so we use the bag as-is, water-tight, but create pontoons. Easier to show in a picture than explain in text, so here: Flight tests: Kite / Balloon Hybrid History Domina Jalbert (of the parafoil fame) experimented with these under the name "Kytoon". They generally seem to be teardrop-shaped balloons with kite-style wings. Here's a reprint from an old Popular Mechanics article. Also see the "Helikite": Helikite on YouTube	Revert
0	warren	April 21, 2012 14:36 \| over 12 years ago (copied from GrassrootsMapping Wiki) Prototype a helium-filled kite that flies in low wind but does not drop due to wind: See this Ram Sled for a possible design: swap out the rammed air cylinders for helium? Black Knight 1 At WhereCamp 2010 at Google Mountain View, a few of us built a prototype helium kite from a single 99 gallon trash bag. (JeffreyWarren, DanLyke, ReidBeels, and a few more) See photo gallery here: Flickr photos of Black Knight 1 Goals made from a single 99-gallon trash bag minimal extra bits needed; packing tape, duct tape, 2 key rings, string, scissors flies in light winds Lessons learned the connection of the side reservoirs to the center line (belly) burst immediately; it really needs to be an order of magnitude stronger should add 4 bridle points instead of 2 so we can adjust the angle of attack in flight tests. Ours didn't climb enough. make it bigger, or out of thinner plastic: we used 2.7 mil and it was a little less than neutral buoyancy. Black Knight 1.1 Suggestion: try making 2 cylinders of helium that are reinforced and sealed with rings of tape. Then connect them with a membrane. NathanCooke, OliverYeh, and JeffreyWarren prototyped some small balloon kites using a plastic bag welder from MIT's D-Lab. See photos on Flickr here We used 2.7 mil plastic with the welder set to 5.5. Triple seams were tough - like in 3d where three lines meet, which is how the old Black Knight design worked. Suggestion: try just sealing horizontally instead of doing a complex joint. We also tried just sealing a bag closed, then welding lines down the middle, so we use the bag as-is, water-tight, but create pontoons. Easier to show in a picture than explain in text, so here: Flight tests: Kite / Balloon Hybrid History Domina Jalbert (of the parafoil fame) experimented with these under the name "Kytoon". They generally seem to be teardrop-shaped balloons with kite-style wings. Here's a reprint from an old Popular Mechanics article. Also see the "Helikite": Helikite on YouTube	Revert

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Comparing revision 3 with revision 2