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James Limburn
3-Sep-10, 12:17 PM
Probably a laughably naive question but is it possible to use an anemometer at a set distance from the outer edge of the duct to measure thrust? I don't need an absolute figure; just a comparison between blade pitches...

Let me know once you've all finished laughing!

broad5186
3-Sep-10, 05:27 PM
the anemometer will measure the velocity of the air but that in itself is not enough

strapping it to a tree with a set of weighing scales is a good method but just use it as a comparison i.e. more or less than last time

good luck

tony

peach4730
4-Sep-10, 10:03 PM
tip: dont tie it to a farmers fence post and bend the post out of the ground! pesky f3 boys:rolleyes: