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Fahrräder mit und ohne Strom
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ISBN10: 3695172649
ISBN13: 9783695172641
Publisher: Bod - Books on Demand
Published: Nov 11 2025
Pages: 70
Weight: 0.21
Height: 0.17 Width: 5.83 Depth: 8.27
Language: German
ISBN13: 9783695172641
Publisher: Bod - Books on Demand
Published: Nov 11 2025
Pages: 70
Weight: 0.21
Height: 0.17 Width: 5.83 Depth: 8.27
Language: German
Mit und ohne Strom Im Teil I des Buchs befasse ich mich mit der Mechanik, die das Fahrrad regiert. Das sind die Kräfte, die erforderlich sind, um das Rad gegen vielfältigen Widerstand, sei es Reibung, Wind oder Schwerkraft, zum Laufen zu bringen. Auffahrt und Abfahrt werden in berechenbare Grö en übersetzt und anhand von Beispielen konkretisiert und illustriert. Im Teil II des Buchs widme ich mich dem elektrifizierten Fahrrad. Es ist das Mittel der Wahl, wenn es um die Beförderung von Kindern, Hunden oder umfangreichen Einkäufen geht. Es kann abgasfrei im Stadtverkehr mithalten. Längere, auch hochprozentige Steigungen können bewältigt werden. Es elektrisiert diejenigen, die grö ere Anstrengungen ohne Motor nicht bewältigen, und begünstigt solche, die bei Kräften sind, sich aber nicht verausgaben wollen. Im Unterhalt ist es billig, und die Energiebilanz ist günstig: mit einer Kilowattstunde können in flachem Gelände (ohne Anhänger) problemlos hundert Kilometer zurückgelegt werden. Es benötigt minimalen Parkplatz. Und da es nur dann Leistung entfaltet, wenn sich Fahrer oder Fahrerin mit eigenem Beitrag beteiligt, fördert es Gesundheit und Wohlergehen. Insofern bleibt eine wesentliche Komponente des traditionellen Radfahrens erhalten: ohne eigene Leistung geht es nicht vorwärts. Und: je mehr Verstärkung angefordert wird, umso günstiger ist das Verhältnis von Motor- zu Akkuleistung. Das ist, unter anderem, Ergebnis einer Reihe von Feldversuchen, die ich im Frühling und Sommer 2025 absolviert habe. Einiges von dem, was hier beschrieben oder illustriert ist (und noch manches mehr), kann auf https: //volkerjentsch.de/Fahrrad.html ausprobiert und in Bewegung versetzt werden.
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