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Competition C2 like traction kite

4.6 m2

Note from the traductor

I‘ve tried to obtain the best traduction as possible. (The original plan was in German)

I‘m not an native english either german speaking person, so errors can happen.

I‘ve traduct this plan for my personnal use.

You can use it as you own use, but without my responsability.

You use this plan at your own risk.

C.T.

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Additionnal notes about the briddle

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Overview and specification

specification:

- min. 30 cm

 

Material:

alternative: Belt for loops

Application of the kites

This kite was developed for the professional application in Buggy races. Beginners in the four-flax reaching or Buggy race should fall back better to a normal Quadrifoil or a similar four liner, since the handling of the Competition is everything else as simple. I‘ve tried to measured an existing kite. It can have measurements inaccuracies.

NOTE!!! This is an unofficial structural drawing. NOTE!!! Quadrifoil and Competition are entered registered trade marks!!! Both Quadrifoil international, which product marketing and also I reject players any responsibility for accidents and/or damage, which can result to this not licenced building guidance from use (however) and/or resulting kites.

Appearance of the kites

The Competition is a bi-elliptical staffless stunt kite. Contrary to other foils the Competition does not possess rectangular and large air intake. The air intake are completely on the lower surface kites cover and soil enclose the profile completely and ensure so a large profile loyalty. The two outside chambers are in the front closed - which is to prevent the decrease of air pressure in the wingtips - holes in the profiles supplied with air pressure. The Competition to build is a very time-consuming project. I‘ve passed a full day to cut the material, sewed two full days and attached the bridles fora full. Thus do not despair, if it lasts longer to built than a Speedwing. With this structural drawing it is extremely important to read and understand everythings carefully, because some steps appear only clear if you have knowledge of the general context. So, and now geht's loosely. Have fun!

The form of the kites

The soil or the cover kites consists of a half ellipse for the leading edge and one of two so-called half ellipses, ever for the trailling edge. In the following table are the construction Data.Y above and y-down. During entry into a coordinate system the center line of the Biellipse is the x axis. one lays on upward y-above and y-down downward. The mesurement data in soil and cover are for the Competition C2 are in cm and include seam and seam margin (so far necessary). It can however never harm to cut the sections out somewhat longer than indicated. By pulling the cloth, incorrect material transfer of the sewing machine or other adverse circumstances it can happens inaccuracies: admit simply add 10cm more of margin. The column per cent displays the size of the profile in the comparison to the original size, inserted in the respective place. This is important, since due to ellipse all profiles are not equivalent large. With this column it should not be a problem to scale the profiles suitably. With the adaption it is important that the upper half ellipse (speak the upper y-values) is kept. The lower half ellipse results then inevitably from the length of the profiles. Thus clear away y-above-values on template and if necessary the y-down-value will be increased. It is not necessary to interpolate the points with Splines. Straight line course is sufficient and is also easier to sew.

 

X-values Y-values above Y-values down Total length Soil cover per cent %

0

14

-14

28

30

32

24

13

27

-22

49

51

57

40.8

27

34

-30

64

69

74

55.2

43

40

-37

77

83

90

66.4

60

44

-42

86

93

100

74.4

78.5

48

-47

95

102

110

81.6

99

52

-51

103

111

120

88.8

119.5

55

-54

109

117

127

93.6

140

57

-56

113

122

131

97.6

161

58

-57

115

124

134

99.2

182

58

-58

116

125

135

100

203

58

-58

116

125

135

100

Table 1: Data for the ellipse. All mesurement in cm

 

 


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 2: The ellipse up to the center, all specification in cm.

For the right half the ellipse must be mirrored. When mirrored it is to be made certain that the chamber in the center may be measured only to the half. The color specification refers to the color design of a original Competition C2. The covering or floor parts was not arranged concave/convex.

The Bridle

The bridle is to be designed as a mirror-image. Therefore only IE left balance (similar to ellipse) is indicated here. In the original of the Competition belt loops are fastened to the soil to the points of bridle, to which the bridle is fastened. The bridle is to be prevented from a rigid line manufactured. At each end of a bridle line is a loop, which approx. 10 cm long and is sewn on approx. 7 cm (s. fig. 3)


 

By these loops those bridle line then to the kite in the belt loops or among themselves by a loops (by means of bay nodes) fastens the lengths that bridle line resulted from measurements from loop end to loop end. In order to make balance linen, still additions for loops must be taken into consideration into the mesurement. I personally never sew bridle line, since one has then no possibility for trims more. Loops finished by over hand nodes. I proceed as follows: Per loop I mesure 1 cm linen length. This functions in any case with Cyclone PES 70 cord around the loop to nodes, i draws a mark at 1 cm and one at 17cm, in each case from the end of the line counted. The two points are superimposed and the loop is knoten. The markings must be afterwards under the node and beyond the loop.

 

 

Figure 3: The final loop of a bridle line

 

The bridle is fastened as follows:

Control line:

Ever four line per profile (primary line), in fig. 4 marked by 1. These four line are indicated into a further line loop (secondary line), in fig. 4 by 2. The three neighbouring secondary line are indicated again into a further line loop (Tertiary line), in fig. 4 by 3. The four Tertiary period line run in a Schekel together (s. fig. 5). In this Schekel is also the aluminum ring, by which the brake line are pulled later.

Brake line:

Starting from the third chamber into the center of the chamber on the Dacron at the trailling edge belt loops are sewn on in each case from the outside (9 chamber/loops on each page of the ellipse). Into these loops those are knoten brake linen (primary linen). Per three neighbouring line who that into a further line loop (secondary linen). The three secondary linen are looped into a further line. This line runs the aluminum ring in the Schekel. This is also the line into those the flight line to be looped (as with the conventional Quadri. Thus rather longer adapt as indicated and more node insert than indicated. Reliably is safe).

 

 

 

 

 

 

 

 

 

 

 

 

 


 

Figure 4: The construction of the bridle left side (control line). Are to be manufactured similarly to brake linen.

 

 

 

 

 

 

Figure 5: The Quadrifoil Competition bridle system


Important: The brake line (with the three or also more nodes) must be led by the ring in the metal link. By this the traction power achieve their optimum.

Primary line 1. Line 2. Line 3. Line 4. Line
Wingtip 25 25 26 28
2 49 47 48 53
3 63 60 61 68
4 74 71 73 81
5 84 81 84 93
6 93 89 92 101
7 101 97 99 110
8 108 102 105 117
9 111 106 110 122
10 115 109 112 124
11 118 111 115 127
Mitte 120 114 117 129

Table 2: The mesure for the primary line (control line). All mesure in cm

 

Wingtip 96
2 82
3 74
4 68
5 61
6 56
7 53
8 50
9 50
10 52
11 53
middle 58

Table 3: The mesure for the secondary line (control line). All mesure in cm

 

Wingtip 120
2 120
3 120
middle 120

Table 3: The mesure for the tertiary line (control line). All mesure in cm

 

3. Chamber from the outside 66
4. 69
5. 73
6. 66
7. 69
8. 75
9. 66
10. 69
11. 77

Table 5: The mesure for the primary line (brake line). All mesure in cm

 

1. Tips cells 136
2. 150
3. 166

Table 6: The mesure for the secondary line (brake line). All mesure in cm

 

Tertiary Bridle 120

Table 7: The mesure for the tertiary line (brake line). All mesure in cm

The profile

The profile of the Competition was copied from an existing kite without isolating. It can have come therefore to small inaccuracies when copying. The points from the profile table are to be connected with a spline. Since the kite is elliptically arranged, the profile must be scaled on the correct size for each chamber. The pper cent collumn fued the scaling are in tab. 1. All X/Y values must be reduce/increased with the appropriate percentage. All important points, which are now discussed, refer to the main profile and must be along-scaled on modification of the size.

The point, at the that is sewn on the profile at the cover is situated with x=1,8cm on the lower surface of the profile.

Four holes for the pressure balance must be cut into the profile. If one ooverlaps with the line sewn on the profile then move the hole a little further. If belt loops are inserted into the soil, then the position of the holes are all the same.

The x-coordinates for the sewn on line or the positions of the belt loops one can take fig. 6 (mesure in cm.)

X-values Y-values above Y-values down Perimeter down Perimeter above
0 120 120 0 0
10 150 90 31.6228 31.6228
20 165 77 49.6505 48.024
30 177 70 65.271 61.8571
40 188 65 80.1371 76.4514
50 195 60 92.3437 91.3174
60 202 55 104.55 103.524
70 209 50 116.757 115.731
80 214 48 127.937 126.955
90 220 47 139.599 137.987
100 224 45 150.369 149.797
110 229 42 161.55 160.81
120 232 40 171.99 171.748
130 236 38 182.76 182.188
140 239 37 193.201 192.81
150 241 35 203.399 203.399
160 243 33 213.597 213.597
170 245 32 223.795 223.647
180 247 30 233.993 233.993
190 247 27 243.993 244.433
200 248 26 254.043 254.043
210 250 25 264.241 264.093
220 252 23 274.439 274.439
230 253 23 284.489 284.439
240 254 22 294.538 294.538
250 255 21 304.588 304.588
260 255 20 314.588 314.638
270 255 18 324.588 324.786
280 255 17 334.588 334.638
290 255 16 344.588 344.638
300 255 15 354.588 354.638
310 255 15 364.588 364.588
320 255 14 374.588 374.638
330 255 13 384.588 384.638
340 254 13 394.638 394.588
350 253 12 404.688 404.688
360 252 12 414.738 414.688
370 252 11 424.738 424.788
380 252 10 434.738 434.788
390 251 10 444.788 444.738
400 249 10 454.986 454.788
410 248 9 465.036 465.036
420 247 9 475.086 475.036
430 245 8 485.284 485.135
440 244 8 495.333 495.284
450 243 7 505.383 505.383
460 241 7 515.581 515.383
470 239 7 525.779 525.581
480 237 6 535.977 535.829
490 235 6 546.176 545.977
500 233 6 556.374 556.176
510 231 6 566.572 566.374
520 230 6 576.622 576.572
530 227 5 587.062 586.671
540 225 5 597.26 597.062
550 223 5 607.458 607.26
560 222 5 617.508 617.458
570 221 5 627.558 627.508
580 219 5 637.756 637.558
590 217 6 647.954 647.806
600 214 6 658.394 657.954
610 212 6 668.592 668.394
620 210 6 678.79 678.592
630 208 6 688.988 688.79
640 207 6 699.038 698.988
650 204 6 709.478 709.038
660 202 6 719.677 719.478
670 199 6 730.117 729.677
680 197 7 740.315 740.167
690 194 7 750.755 750.315
700 192 8 760.953 760.805
710 189 8 771.394 770.953
720 187 8 781.592 781.394
730 185 8 791.79 791.592
740 182 8 802.23 801.79
750 179 8 812.67 812.23
760 177 8 822.868 822.67
770 174 8 833.309 832.868
780 171 9 843.749 843.359
790 168 9 854.189 853.749
800 165 9 864.63 864.189
810 162 10 875.07 874.679
820 160 10 885.268 885.07
830 157 11 895.708 895.318
840 155 11 905.906 905.708
850 152 12 916.347 915.956
860 150 13 926.545 926.396
870 147 14 936.985 936.595
880 144 15 947.425 947.035
890 142 16 957.623 957.475
900 139 18 968.064 967.821
910 136 18 978.504 978.064
920 133 18 988.944 988.504
930 130 19 999.385 998.994
940 126 20 1010.15 1009.43
950 123 21 1020.6 1020.2
960 121 21 1030.79 1030.6
970 118 22 1041.23 1040.84
980 116 23 1051.43 1051.28
990 113 24 1061.87 1061.48
1000 111 25 1072.07 1071.92
1010 108 25 1082.51 1082.07
1020 105 26 1092.95 1092.56
1030 102 27 1103.39 1103
1040 100 28 1113.59 1113.44
1050 97 29 1124.03 1123.64
1060 95 30 1134.23 1134.08
1070 92 30 1144.67 1144.23
1080 90 31 1154.87 1154.72
1090 87 32 1165.31 1164.92
1100 84 33 1175.75 1175.36
1110 82 34 1185.94 1185.8
1120 77 35 1197.12 1195.99
1130 76 35 1207.17 1207.12
1140 73 37 1217.61 1217.37
1150 71 38 1227.81 1227.66
1160 67 40 1238.58 1238.01
1170 65 42 1248.78 1248.78
1180 62 42 1259.22 1258.78
1190 55 45 1271.43 1269.66

Table 8: Profile data for the Competition C2. all mesure in mm

 

 

 

 

 

Figure 6: The profile with important data.

   It is matter of taste whether sews loops into the soil or a zigzag line on the profile. According to my opinion the zigzag line has the advantage that the course kites on the whole profile is distributed evenly; in contrast to the loop, where the course is determined on one point only. If you uses loops, then you needs the briddle line only with bay to the loops to nodes. If you uses the zigzag line, you must proceed as follows: In the places, in which the sewn on line at the soil makes the break (A-D), must a baridle line is attached. In addition one stings with a splice needle into the soil, leads the bridle cord directly over the break by the profile and breaks through on the other page again the soil. Then in accordance with fig.7 a tightening node is manufactured.

Sewing technique

In order to build the Competition, one needs experience with staffless kites and first of all much time and patience. Because the Comp. the construction has other foil than conventional mats became surely more time-consuming. Cover and soil consist not of a section, but of individual strips, which must be first processed and together-sewn.

First, the templates for the soil, the cover and the profiles must be manufactured. In addition the data from the appropriate tables are transmitted to sturdy pasteboard and the templates are then cut out. The pasteboard should be so stable that it does not away-burn with the first contact with a soldering iron. The sections of the cover can be cut out as simple trapezoids (or as ellipse, which is then cut in strips. Then a seam addition must be taken into consideration by 1 cm) at each long side. With the sections of the soil a light curve must be cut out in front at the air inlet.
This curve results in later the air inlet. In fig. 8 this is again coloured represented. The normal trapezoid of the upper ellipse (values y-above) is light-grey. Dark grey the curve is represented, which must be still cut out from the floor parts. This circular arc has a maximum exactly in the center of the line, which connects the two y-values (maximum 4-5 cm with each floor part).

A special feature occurs with the two outside chambers. These are course-sewn above and possess no air inlet. The printing is structured by the holes in the profiles. The sections for the two outside chambers are to be adapted thus somewhat differently than the other sections. On the air inlet edge of these two sections no curve is set and also no Dacron, but ever for under and upper section a seam addition is sewn on by 1.5 cm added. Then the two sections at the air inlet edge are normally quilted and the seam addition on the top side with a zigzag pass is sewed. It is alike to all soil and cover sections that at the left and to right page a seam addition by 1 cm is admitted. On this seam addition later the profile is sewn

 

Figure 8: The air inlet

In order to cut the foil out, GET one so forwards:

Reinforcement

After all soil and cover sections were cut out, can be begun with the sewing work. The cover sections (up to the two outside) are set in at the air inlet edge with Dacron. In addition the Dacron is centrically folded and the air inlet edge is shifted into the crease. Sew with 3 zigzag pass.

With the following trick this work goes more easily and faster: The Dacron is not suitably cut and sewn on then, but it will proceed as follows: The third section is shifted and stitched into the break (with 3 zigzag stich). And further-sew this type shift the next section into the break receive one a chain from cover sections, which splits afterwards only must become hot. Exactly the same with the floor parts will proceed. Only with the third section begin also here. These are set in however with fabric tape. After all covering and floor parts were strengthened, can be begun with the assembling of the cover and the soil.

Cover and soil

The outside two sections of the ellipse are differently sewn than the remainder: in each case sew soil to the cover. The seam addition depends on the half width of the Dacrons used for setting in. Repeat for both sections and both pages. The seam addition also with 3 pass zigzag quilted on the cover.

The two developed sections now lengthwise together-sew. In addition at the seam line cover/soil begin and only the cover seam, then the soil seam quilt. With the soil seam of the belt loops think, if without the zigzag line one does. Now together-quilt the complete cover. Seam addition 1 cm. at the edge (seam 2./3. Part) that dier seam line with the Dacron of the third section lock soil/cover of the second section cleanly. After, which was sewn complete cover, the soil inserted. Proceed as follows in addition:

 

 

 

 

 

 

 

Figure 9: Thus the soil is sewn to the cover

The profiles

For the profiles templates in different sizes must be manufactured. The values for the scaling can be refered from tab. 1. The profiles can be scaled with a still-picture projector, a copier or a good diagram program (e.g. Corel Draw). The values can be converted also by hand, by taking the new length and by the old dividing all X/Y values must then by this calculated value is multiplied. Now the profiles are inserted.
NOTE: In no case forget the holes for the pressure balance!!! # In the together-sewn kite upper and lower part the seam additions are located inward away. On these seam additions the profiles are sewn. First the profiles are sewn on the cover. In addition always put the profile with point Z to the Dacron fold to stitch and (with zigzag stitch). Repeat with all profiles. It makes certain that point Z in the same place is always sewn on. If all profiles on the cover are sewed, they must be sewed on the soil. The most difficult is it here to stitch the roundness of the profile nose. Always make to two passes, profile position correct and further-sew. If all profiles are inserted, the two outside seams must be closed. Don‘t put hole on the edge profiles, it must however belt loops for a bridle suspension be attached. The points for the belt loops one keeps if one the main profile on 28 cm reduced. The points A-D are along-reduced. In these places then belt loops must be inserted.

Trailling edge

Now the trailling edge is sewn. In addition it must be brought first in form. The unneeded material is removed in addition approx. 1-1.5cm from the profile ends. It is advisable to draw in between the individual section ends lines and quilt these. Then the unneeded material is centrically folded cut off, Dacron, the trimmed dragging edge is shifted into the crease and quilted with 3 zigzag pass. On the Dacron still belt loops for the brake linen must be attached now. These are attached from the outside, 9 on each page, starting from the 3rd chamber always in the center of the respective chamber. Thus the sewing work is terminated, now the bridle must be looped and fixed. Afterwards is the kite. Possibly still smaller trim work on the bridle is necessary. Good Flight !!!!!!!!!!!!!!

 

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