JG3

Hi JG3 - Just re read your article(s) on propeller performance/comparisons. I have been trying to get some informed comment on CS/IFA props (you may have seen my thread "Prop Selection" on the topic. I would be very interested in your observations on the matter.

You will find in the aforementioned "thread" my rational for going down this particular line of enquiry - in short - terrible home field, requiring short field TO/Landings, ever time. Ground adjustable set for advantage climb. Resulting in, expected, reduced cruise performance. My wish to explore options to retain excellent existing TO & climb out performance, while significantly improving cruise. Seems to me a CS/IFA is the only way I can have my cake and eat it. I guess the question is by how much (if at all) can I expect to gain in cruise.

Aircraft: ATEC Zephyr, motivated by Rotax 912 ULS through a Fiti 2 blade ground adjustable. Note:  Fiti - couldn't be happier - very smooth, quiet running.