Anjali

A hindu name, female, meaning: ‘divine offering’.

This HPA was made by TeamHolland, a team consisting of members of the Dutch Consulate in Japan, Tori Uzura, Jesse van Kuijk, and many Japanese volunteers. The Dutch Consulate decided to join the Japan International Birdman Rally 2012 (JIBR) to promote Dutch technology and engineering. The JIBR is a yearly, famous, televised HPA competition in Japan.

The complete aircraft design was done by Jesse van Kuijk, modifying his new HPA design to fit the contest rules and available time to the actual event. Construction took place near Nagoya. Team leads on site were Tori Uzura and Jesse van Kuijk, with support from the Dutch Consulate in Osaka. Together with a team of more than 20 Japanese volunteers, they built a 32 m wing span HPA in less than 9 weeks(!) With two weeks to go to the actual JIBR event, several test flights were made. The first flights were made by Jesse. A strong Dutch amateur racing cyclist, Rik Houwers, made more test flights, and flew the competition flight.

The structure was again a multiwire design, this time with carbon tubing instead of aluminum. The heavy 1.5 mm steel wires from Abhilasha were changed to thin steel wires (piano wire). The wing planform was double trapezoidal to closely follow an elliptical lift distribution. The airfoil was DAI1336, a laminar, low Reynolds number airfoil. The wing span was 32 m, with a wing area of 44.8 m2. This aircraft was designed with the possibility for 3-axis control, but was built with 2-axis control due to severe time pressure. Some roll-yaw coupling was possible with dihedral present in the wing. Both elevator and rudder surfaces had N0009 airfoils. The cockpit had a streamlined fairing for the competition flight. The sleek propeller blades were made of carbon and XPS foam. The diameter was 3.6 m.

We even flew the HPA indoors in a large dome often used for trade fairs! We had no other option as it was raining outside, and we wanted to practice some take-offs for the JIBR competition.

The test flights went great, in the calm wind conditions at Hida Airpark. During the competition, we were scheduled to fly in the morning. The wind was absolutely dead calm in the morning, ideal conditions. We got rescheduled to start after noon, so we waited. As the sun rose higher, the winds picked up too. There was quite a cross-wind component when Anjali started the competition flight. Rik made a fantastic effort, but the cross-wind proved too strong. TeamHolland did not win, but did not end up last either! The test flights in calm conditions showed that Anjali could have flown much further. This HPA was by far the best Dutch HPA ever flown. It has been a privilege to have been part of the Japan International Birdman Rally!