Chinook Question

[bjt4888]

https://www.youtube.com/watch?v=86ZrFkg ... dex=1&t=8s

Question posted on this video and reposted here: What are the measurements of your designs, or avg measurements?

Brian T

[bjt4888]

https://www.youtube.com/watch?v=86ZrFkg ... dex=1&t=8s

Question posted on this video and reposted here: What are the measurements of your designs, or avg measurements?

Brian T

My reply:

The 2024-25 prototype demonstrated in the video is one that my teams have been testing and uses rotor from a previously constructed Freedom Flight kit from 2018. Of course, this is not legal to use in competition as the current year team did not build it. It has allowed us to gather data to point us in a good direction though.

The rotors are 30 cm diameter with 8" average pitch top and bottom. The fuselage stick is 14.75" long. Interestingly, these dimensions are close to the same as found on the two top kits on the market so far (we picked the proto design before kits were on the market), the J&H Aerospace and Freedom Flight Models kits. As all of the kit helis out so far fit easily in the rules maximum size box, I am thinking that they are partly designed to this size so that they are flyable with commonly available rubber size (1/8" wide strip) and are not necessarily the absolute optimum design solutions.

Rotors larger in diameter than those in the current kits will fit in the box designated in the rules and these larger helis will require very high winding torque and thick rubber motors that most teams do not have the equipment for (heavier duty winders, torque meters and rubber strippers). Still, if your team wants to test the potential of larger rotors, you can definitely buy the heavier duty winders, make a heavier duty torque meter and get a rubber stripper to cut wider rubber for motors.

Brian T