Asymmetrical Top Rotor
Asymmetrical Top Rotor
I was looking at this year’s Freedom Flight Model kit and noticed that the top rotor is asymmetrical, which I believe is the blades not being evenly spaced 90 degrees apart like last year’s kit. Does anyone know why an asymmetrical top rotor might be beneficial, or what advantages it could provide?
Last edited by KDTrey5 on Sun Sep 14, 2025 7:34 am, edited 1 time in total.
-
coachchuckaahs
- Coach

- Posts: 828
- Joined: Mon Apr 24, 2017 9:19 am
- Division: B
- State: NM
- Has thanked: 2 times
- Been thanked: 126 times
Re: Asymmetrical Top Rotor
Because the specified box is not a square end, but rather a rectangle
Coach Chuck
Coach Chuck
Coach, Albuquerque Area Home Schoolers Flying Events
Nationals Results:
2016 C WS 8th place
2018 B WS 2nd place
2018 C Heli Champion
2019 B ELG 3rd place
2019 C WS Champion
AMA Results: 3 AAHS members qualify for US Jr Team in F1D, 4 new youth senior records
Nationals Results:
2016 C WS 8th place
2018 B WS 2nd place
2018 C Heli Champion
2019 B ELG 3rd place
2019 C WS Champion
AMA Results: 3 AAHS members qualify for US Jr Team in F1D, 4 new youth senior records
-
bjt4888
- Member

- Posts: 985
- Joined: Sun Jun 16, 2013 12:35 pm
- Division: C
- State: MI
- Has thanked: 0
- Been thanked: 71 times
Re: Asymmetrical Top Rotor
The 70/110 degree top rotor blade orientation allows 5 cm additional rotor diameter.
Brian T
Brian T
-
dbailey
- Member

- Posts: 16
- Joined: Thu Oct 02, 2025 7:36 pm
- Division: C
- State: CA
- Pronouns: He/Him/His
- Has thanked: 4 times
- Been thanked: 1 time
Re: Asymmetrical Top Rotor
Is the FF top rotor considered a "4 bladed rotor" and therefore not eligible for the 10% bonus offered by rule 6.c.iv?
-
coachchuckaahs
- Coach

- Posts: 828
- Joined: Mon Apr 24, 2017 9:19 am
- Division: B
- State: NM
- Has thanked: 2 times
- Been thanked: 126 times
Re: Asymmetrical Top Rotor
Correct. The top rotor has 4 blades, therefore it is a four bladed rotor and not eligible for the bonus.
Coach Chuck
Coach Chuck
Coach, Albuquerque Area Home Schoolers Flying Events
Nationals Results:
2016 C WS 8th place
2018 B WS 2nd place
2018 C Heli Champion
2019 B ELG 3rd place
2019 C WS Champion
AMA Results: 3 AAHS members qualify for US Jr Team in F1D, 4 new youth senior records
Nationals Results:
2016 C WS 8th place
2018 B WS 2nd place
2018 C Heli Champion
2019 B ELG 3rd place
2019 C WS Champion
AMA Results: 3 AAHS members qualify for US Jr Team in F1D, 4 new youth senior records
