Finally got to tune my new wing/fuselage yesterday. I was amazed to find that changing the AoA on the rear wing from zero to - 3 degrees was transformative. All of a sudden it was so stable I could ride with my feet together and even switch my feet while up on the plane, something that I was never able to do on the old one. Stoked to say the least.
Setup is 550mm span, 600cm2 area, AR 4.9, NACA 63-412 (moth) foil section, hardwood core and 5 layers of 10 oz stiched e-glass. 43 cm between TE of wing and LE of tail plane. 20x20mm 6061 T5 aluminium fuselage. Zero degrees of front wing and -3 on the tailplane. All bolts at M6.
Its not a canard design, it just has a straight leading edge so that I could wrap the LE and have the glass joint at the trailing edge. My previous wing had the join at the leading edge and in the course of shaping I thinned it too much and after a hitting a few sand banks it split along the join and eventually failed.
One problem it has picked up is a high pitch ringing at intermediate speeds. The noise goes away when edging hard and higher speeds. I'm using it on my existing strut and with the old wing/fuse there is no noise so its something related to the new wing/fuse set. I find it pretty unnerving because the sound is right in the key of Tiger Shark so I'm keen to make it stop. Any suggestions on the cause or things to try to work out the source of the ringing ?
Thanks
Matt