Rubber Band Propelled Straw Kite

Materials

N  Nine approximately 29cm long 5mm diameter straws

N  A 5.5mm diameter straw

N  A 6mm diameter flexible straw

N  A thin plastic bag

N  Three paper clips

N  A bead which has bigger diameter hole than clip wire diameter

N  A 15mm diameter plastic disc cut from carbonated drink bottle

N  A 1.5cm bamboo stick

N  A 1.5liter Voltic bottle

N  Two rubber bands

 

Tools

N  A ruler, A thin metal wire or string, A good pair of scissors, A good pair of thin nose pliers, A compass and Cello tape

 

2. How to assemble kite body frame

                                                        Fig. 1

1.            Cut out straws along the size shown on figure 1.

2.            Make a transverse slit on the straws like figure 1. Cut the straws about 70% of its diameter.

3.            Make longitudinal slits on 70mm arms of front wing beam 1 & 2 and lower cross beams 1 & 2 (figure 2).

4.            Make longitudinal slits on 25mm arms of lower cross beam 1 & 2 and 28mm arms of upper cross beam, like figure 3 but do not make slit edge to edge, leave 2mm.

Fig. 2

Fig. 3

 

 

Fig. 4

5.            Insert 70mm arm of a front wing beam 1 into keel strawfs long arm (figure 4 & 5).

6.            Insert another front wing beamfs 70mm arm into keel strawfs long arm (figure 6).

Fig. 5

Fig. 6

Fig. 7

Fig. 8

7.            Insert 70mm arm of lower cross beam 1 into keel straw using different end (figure 7).

 

8.            Insert 25mm arm of the lower cross beam 1 into near front wing beam free end (figure 8).

 

Fig. 9

Fig. 10

9.            Connect lower cross beam 2 like figure 9.

 

10.        Figure 10 shows front view of the kite.

 

 

Fig. 11

Fig. 12

Fig. 13

11.        Cut off a square piece of plastic from middle part of propeller unit holder (figure 11 & 12).

 

12.        Insert upper cross beam into the propeller unit holder (figure 13).

 

Fig. 14

13.        Slide the propeller unit holder to centre of the upper cross beam.  Then push the holder from both side to make a tubular hole.

 

Fig. 15

Fig. 16

14.        Insert each 25mm arm of upper cross beam to free end of lower cross beam respectively (figure 15 & 16).

 

Fig. 17

15.        Collect and make three approximately 6.5cm straws and three approximately 7cm straws from remaining 5mm diameter straw pieces.

16.        Make longitudinal slits on the straws (figure 17).

17.        Insert three 6.5cm slit straw into front wing beamsf and keelfs rear ends about 3.5cm deep respectively.

18.        Insert three 7cm slit straw into the 6.5cm slit straws about 5cm deep respectively (figure 18, 19 & 20).

 

 

Fig. 18

Fig. 19

 

 

Fig. 20

19.        Insert rear wing beams and centre wing beam into the space between straw A (6.5cm slit straw) and straw B (7cm slit straw) on figure 21.  Squeeze beam straws up to the end firmly (figure 22 & 23).

Fig.21

Fig. 22

Fig. 23

 

3. Propeller unit assembly

1.          Make a hole with compass needle in the middle of the propeller (figure 24).

2.          Insert hook like clip wire into the plastic disc and the bead (figure 25).

3.          Bend the wire like the picture above (figure 26 & 27).

4.          Make a hole on the propeller and insert the free end of the wire (figure 28).

5.          Bend the free end of the wire like the pictures and fix the wire on the propeller (figure 29, 30 & 31).

6.          Bend the plastic disc and make two slit like figure 32, then fold up the part between slits.

7.          Cut above flexible part of 6mm diameter flexible straw and make a 17.5cm piece.

8.          Make to shallow V shape cut on the flexible edge of the straw in order to catch the plastic disc (check figure 39).

9.          Hook two rubber bands with a metal wire then put the wire through straw attached to the keel (figure 34 & 35).

10.       Put 17.5cm piece into propeller unit holder, then put the wire into the 17.5cm piece (figure 36).

11.       Use a 1.5cm bamboo stick to fix the end of rubber bands (figure 37).

12.       Pull the rubber band out of 17.5cm straw, then remove the wire and hook the propeller to the rubber bands (figure 38 & 39)

 

4. How to paste wing

  Cut out thin plastic sheet of a plastic bag or of plastic bags.  The size is shown below.  Fix the plastic sheet on wing beams with cello tape or other proper adhesive.

 

5. Balance the kite

 

Fig. 42

 

1.         Insert one or two paper clip(s) into the tail end of centre wing beam (figure 42).

2.         In a large room like a gym or an assembly hall or in the school ground where it is windless, hold and support the kite gently with keel or forepart of centre wing beam.

3.         Push the kite forward (slightly downward) into the air slowly and check the flight.

4.         Adjust the numbers of clip (balancer) and balancerfs position until the kite reaches the farthest.

6. How to fly the kite

 

1.         Hold the upper part of propeller unit straw with your left hand then using with your right hand index finger wind up the propeller at least sixty times.  How many times you can wind up depends on the strength and quality of the rubber bands.

2.         Hold the propeller with your left hand and hold the centre wing beam with your right hand.  Push and release the kite slightly upward into the air.

3.         Let us check the best flight condition.

7. Warning!

              Do not play with the kite near the road or railway.

              Do not play with the kite near the electric cable nor expensive illumination lamps.

 

 gRubber band propelled straw kiteh copyright JICA Senior Volunteer Hideo Nakano (January 2008)

 

inserted by FC2 system