Mario

About the lower winglets: I´ll second Chrissi here! The cozy info-pak contained a very inresting article about aft c.g. testing and modifications to avoid deep-stall in the mark IV. Adding or removing the lower winglets hat a major effect here, so that´s a point I would be very reluctant to exercise self-realization unless I absolutely knew what I did. By the way, @Chrissi: strange colours but great site!! Kind regards, Mario

Hi canardians, does anyone have experience in minimizing the noise-level of a canard aeroplane? Here in germany we have quite strict noise-regulations that seem hard to achieve just by muffling the exhausts. The two possibilities I see are: a) significantly reducing the rpm of the prop (just achievable by using a PSRU) to about 2000rpm or so. b) avoiding the whole propeller-blade passing the trailing-edge at the same moment (bring it to "peel" along the trailing edge rather than "hit"). This can be done by curved propeller blades (I saw them on a pusher for purpose of noise-reduction but there´s no great assortment of these blades) or moving the prop-axis above the trailing-edge-level. While the low rpm asks for significant increase in prop-diameter it would go well with rising the prop-axis. I know that would mean leaving the approved thrust-line but it should be possible tho correct that by adjusting the thrust-angle. Any experience in this field? Kind regards Mario (is-it-possible?-phase)