Whirlwind Propellers
in General Tech Discussion
12 years ago
Greetings all,
I just read an article in Kitplanes about the Whirlwind Propeller. In the article the author claims to gain 10mph in cruise and 10% in climb over the Warp Drive propeller when installed on a Rans S-7. I have been told several times that the Warp wasn't as efficient as some others because it was much heavier. Roger Lee has stated that all props are equal if pitched to run 5500 to 5600rpm WOT at your normal cruise altitude.
I have managed to not spend the grand plus to find out if the Warp is less effeciant than others but I am now tempted. The article almost sounded like a paid advertizement. I am flying a Highlander with the Rotax 912uls and a 70" Warp. I just gained 5mph by ditching the bungee bags. It would be nice to gain 10mph by prop swapping.
Any comments, positive or negative, will be appreciated.
Alan
I just read an article in Kitplanes about the Whirlwind Propeller. In the article the author claims to gain 10mph in cruise and 10% in climb over the Warp Drive propeller when installed on a Rans S-7. I have been told several times that the Warp wasn't as efficient as some others because it was much heavier. Roger Lee has stated that all props are equal if pitched to run 5500 to 5600rpm WOT at your normal cruise altitude.
I have managed to not spend the grand plus to find out if the Warp is less effeciant than others but I am now tempted. The article almost sounded like a paid advertizement. I am flying a Highlander with the Rotax 912uls and a 70" Warp. I just gained 5mph by ditching the bungee bags. It would be nice to gain 10mph by prop swapping.
Any comments, positive or negative, will be appreciated.
Alan
