Description

Warning: this kit is fairly simple, but it is EXTREMELY unforgiving of minor misalignments and build mistakes. Having blade dihedral angles off by as little as 2 degrees can make the model unflyable. If you are not already getting at least 75 seconds from a Tornado, do not even attempt to build this model.

Hurricane kits will begin production for shipping on December 13, 2024.

Based on Dr. David Aronstein’s Box Fly, the Hurricane is the ultimate solution for the Science Olympiad Helicopter Division B and C rules for the 2025 season. It builds to a rotor diameter of over 17 inches by fitting sideways in the compliance box. Most models build to 4.2-4.9g and can produce flight times of well over 2 minutes even at 5 grams. Our best time so far is 2:55. Includes parts for 2 complete helicopters and Tan Supersport rubber. The rotors utilize special 3D printed hubs which secure the required dihedral and pitch angles. Our 2024/5 check-in box meets the specs for the draft rules.

Hurricane 2025 Build Manual V1.1

Tools/materials required: rubber lubricant, winder, CA glue (or Duco/Ambroid/Sigment), 3M-77 spray adhesive, vaseline, razor blades, sandpaper, ruler, scissors. Don’t forget a Check in Box!

Optional: Torque meter, turns counter (volareproducts.com), scale, forceps. 

Recommended replacement rubber is 1/8″ rubber strip.

Basic flying notes: Don’t expect much of a climb until you’ve hit 300-400 turns. Full power is around 800-1000 turns typically. Make sure the rubber is well lubricated with silicone oil and that you are stretching the rubber 4-5 times relaxed length, winding in half of the turns before working your way in.

J&H Aerospace is not affiliated with Science Olympiad; this product listing does not constitute an endorsement by S.O.