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Harald Prinzler Mikroelektronik, Fesseldrachen und Fotografie |
Detmolder Straße 93 D-33175 Bad Lippspringe Phone: +49-5252-7830 email: harald@hprinzler.de URL: http://www.hprinzler.de |
Flowform FF04A
The flowform FF04A is a modified version of the FF04 (Molar shaped Flowform). The keel height is reduced to get a stable flight even in larger wind speeds. The height of the inlet is reduced to prevend possible folds on the upper leading edge.
Like the FF04 this kite is built with 8 chambers and 5 keels, too. The 2 center chambers are open at the trailing edge (jet chute). The internal pressure exchange is made by holes on the inner ribs (vents).
All values are related to the base line of the profile (lower leading edge to trailing edge = 100). With the given datas you should calculate all pieces of the kite depending on your chosen size. The length of the base line should be 2 metres or more.
All profiles are made complete, except profile P5, which is formed like the profile P4 with a cutted trailing edge.
P1 P2 P3 P4 P5 Xp Yp Xp Yp Xp Yp Xp Yp Xp Yp -------------------------------------------------------------------------------- 0 0 0 0 0 0 0 0 0 0 -9.453 13.515 -9.453 13.515 -9.453 13.515 -9.453 13.515 -9.453 13.515 -8.250 14.048 -8.250 14.048 -8.250 14.048 -8.250 14.048 -8.250 14.048 -5.243 15.166 -5.243 15.166 -5.243 15.166 -5.243 15.166 -5.243 15.166 -2.236 16.035 -2.236 16.035 -2.236 16.035 -2.236 16.035 -2.236 16.035 0.000 16.551 0.000 16.551 0.000 16.551 0.000 16.551 0.000 16.551 3.778 17.213 3.778 17.213 3.778 17.213 3.778 17.213 3.778 17.213 9.792 17.824 9.792 17.824 9.792 17.824 9.792 17.824 9.792 17.824 15.806 18.005 15.806 18.005 15.806 18.005 15.806 18.005 15.806 18.005 21.820 17.846 20.748 17.846 19.677 17.846 18.606 17.846 18.606 17.846 27.833 17.409 25.691 17.409 23.548 17.409 21.405 17.409 21.405 17.409 39.861 15.882 35.576 15.882 31.290 15.882 27.004 15.882 27.004 15.882 51.889 13.690 45.461 13.690 39.032 13.690 32.603 13.690 32.603 13.690 63.917 10.992 55.345 10.992 46.774 10.992 38.203 10.992 38.203 10.992 75.944 7.869 65.230 7.869 54.516 7.869 43.802 7.869 43.802 7.869 87.972 4.343 75.115 4.343 62.258 4.343 49.401 4.343 49.401 4.343 93.986 2.420 80.058 2.420 66.129 2.420 52.200 2.420 50.000 3.941 100.000 0.378 85.000 0.378 70.000 0.378 55.000 0.378 50 0 100 0 85 0 70 0 55 0 0 0 0 0 0 0 0 0 0 0Vents on profile:
Profile Xp,Yp Diam. Xp,Yp Diam. Xp,Yp Diam. Xp,Yp Diam.
(Vent 1) (Vent 2) (Vent 3) (Vent 4)
-----------------------------------------------------------------------
P1 (no vents)
P2 20,7 10 35,7 10 50,6 8 65,3.5 3
P3 20,7 10 35,6 8 50,4 4 -
P4 20,7 10 35,5 6 - -
P5 20,7 10 35,5 6 - -
The outer keels (K1) have a length like the base line of the outer profile (P1). The inner keels (K2) have a length like the base line of the center profile (P5).
K1 K2 Xp Yp Xp Yp -------------------------------- 0 0 0 0 0 -27.008 0 -27.008 100 0 50 0 0 0 0 0
Length: 100 (theoretical)
Width: 80 (complete)
Chamber width: 10
Length of pieces for surface:
C1U: 100 C2U: 85 C3U: 70 C4U: 55
Air flow holes:
The air flow holes are placed in the middle of the chamber width on the given
distance to the leading edge of the bottom surface.
C1U C2U C3U C4U
------------------------------------------------
Distance LE 10 20 30 40
Diameter 5 4 3 2
Length: 112.193 (theoretical)
Width: 80 (complete)
Chamber width: 10
Length of pieces for surface:
C1O: 112.193 C2O: 97.638 C3O: 83.305 C4O: 69.404
Air flow holes:
The air flow holes are placed in the middle of the chamber width on the given
distance to the leading edge of the top surface.
C1O C2O C3O C4O
------------------------------------------------
Distance LE 80.907 60.585 40.191 20.037
Diameter 5 4 3 2
The trailing edges of the chambers C4 are open. Cut the surfaces between the ends of the profiles P4 and P5 on a straight line. All other trailing edges are closed.
Bridle line: 1.0mm polyamide (for 2 metres spanwidth)
B1 B2 B3 ------------------------ 200 201 204