Dowel Barn Door Kite
by MBK Flight Reporter: Craig Ensley
(Lebanon, OR, USA)
The MBK Barn Door Kite in flight next to the moon
This evening was the first feature length flight of my MBK Dowel Barn Door Kite!
Construction was pretty much stock according to the MBK plans and technique. However, I chose to use 3/16" spars instead of 1/4". The 5mm spars that are called for in the plans actually work out to be a little shy of 1/4" On the other hand 3/16" spars are much smaller and weaker than 5mm.
(A note to readers... The e-book "Making Dowel Kites" will be handy if you decide to have this kind of experience for yourself one day - Tim P.)
I usually opt for 1/4" because light, consistent breezes are a rarity here in the Willamette Valley. Wind in Oregon seems to be either 10+ MPH or less than 5 MPH. As flimsy as the 3/16" spars are in 48" length, this kite was going to be a light build that I could fly in even the lightest breeze. I was willing to sacrifice some strength for weight.
All throughout the building process, I was determined to make this a very light kite with no excess weight...
I used the minimum amount of clear tape necessary to hold things firmly in place. I use clear cellophane tape (box tape) that I cut into strips by sticking strips on a piece of scrap wood or glass and cutting lengthwise with a knife or razor. I've found that it stretches less than scotch tape.
For the spar pockets, I use regular electricians tape. As I type this, I get the idea of using strapping tape; that's the clear stuff with strings embedded in it. It's just a thought. The only area that could be lighter is the bridle. I chose to use small split rings in place of the Prusik knot. These added a very small amount of weight, but I trust their simplicity more than my knot work.
All these ingredients added up to a 2.0 ounce kite that would fly in winds that were previously out of the question!
I almost always carry some type of kite in the trunk of my car in case I end up at the park or anywhere else with wind and grass.
Lately, I have been carrying my MBK Delta for light winds, and a rhombus Box for the stronger winds. As much as I like the delta, I usually can't get it out of ground effect in these 5 MPH breezes. I expect the Barn Door kite to excel at light wind flight.
Yesterday evening, I made the mistake of trying to fly the Barn Door Kite in 15 MPH winds. It made it high enough to do some adjusting on the bridle, but the kite ultimately ended up with a broken spar. On the other hand, my rhombus box kite got a "super-fantastic" flight. Every time I fly that box kite I am shocked at the stability of it. It is, as they say, "nailed to the sky" much like a large tetrahedron.
The night before, I had the kite out in our front yard trying to set the tow point. This went well, but the kite still had a pull to the left. I'm guessing it was due to an uneven bow in the spar. I had to do some sanding to get an even curve on my cross spar. It took two 1/2" adjustments to get to kite to fly true, but I got it after a while.
This evening I wanted to get a good flight on the Barn Door Kite so I loaded it up and headed over to the park again. It was very calm at the park, but there was enough wind at 100 feet or so to fly it.
I could see the cottonwood leaves "fluttering" from about 100 feet up. This was a sure sign of usable wind that I didn't want to waste. At this point, I was willing to jog or walk quickly in this case until I found enough wind to fly with.
This kite was light enough to fly in these light breezes so I just walked along and let the line out as it asked for more. It didn't pull much when it was at an 85 degree line angle.
I did have to take out all the adjustments from earlier and put them back to stock. Every time the kite got down in the eye of the wind, it would swerve to the right until it landed This happened twice, but it flew great once the bridle was adjusted.
Much to my delight, there was definitely enough wind to keep this kite up in it's element! I was also able to get a good video clip of the kite which I will share with anyone interested in building one of these kites. About half way through the flight, the wind died and the kite settled for a bit. Fortunately, the breeze returned for another 15 minutes and I got one more short flight in before the wind went to bed for the night.
Overall, this was an enjoyable evening flight. The kite is a fantastic light wind flyer that is capable of handling some small gusts, but not too much with the 3/16" spars. It is a very stable kite that I would not hesitate to fly at the beach with thicker spars.
I would recommend this kite for anyone in an inland environment that doesn't get good sea breezes all the time. The construction was very simple and straightforward with no tricky areas whatsoever. This would be perfect for a first time builder who wants something unique!
In the future I plan to do a six foot Barn Door, and an eight foot version if that goes well. I am going to use something that is not clear for these subsequent kites. In view of this, I am experimenting with "lumber tarps" that contractors and lumber stores use to cover stacks of dimensional lumber while it is being shipped and/or stored. I have been able to get quite a number of these tarps for free on craigslist.org through a contractor in Portland, OR. I can only assume that there are lumber stores all over even in places with fewer trees than Oregon since people will always need to build houses.
Download the e-book "Making Dowel Kites" here.
E-book special of the month (25% off)...
e-book takes you step-by-step through making a 120cm (4 ft) tall
Parafoil kite. This 4-cell kite performs best in gentle to moderate
wind speeds. That's 12 to 28kph or 8 to 18mph. Even in light
winds, this kite will hang in the air, although at low line angles.
In fresh winds, it pulls firmly for it's size, so small kids
should only fly it while supervised!
Every kite design in
the MBK Soft Series satisfies the following points...
- Materials are
plastic sheet, tape and line – and nothing more!
- Tools are a ruler,
scissors and a marker pen - and nothing more!
- All cuts are
along straight lines.
For the greatest chance
of success, I make recommendations regarding the materials. For
example, the type/weight of plastic, type/width of tape and line
type/strength. Close enough should nearly always be good enough,
since the design is well-tested and should be tolerant of small
differences from my original.
Get the e-book for making the MBK Parafoil kite. After making your first one in plastic and seeing how it performs, you can try soft Tyvek or rip-stop nylon for your next build.
The e-book is a PDF file - which means printable instructions to refer to while you make the kite. It also means convenient off-line access if that suits you better.
May 10, 17 06:00 AM
This previously published page is a mixture of informative data and historical background. Also there is also a video of one of my own tetrahedral designs in flight!