I thought to share this here, as it might help others with the same issue. I have added a rubber O-ring around the mast at about 15 cm above the fuselage (see picture) which is supposed to block the ventilation towards the stabiliser. This seems to be working for me! https://photos.app.goo.gl/inppPP...

After having owned the Balz Pro 799 and 899 I recently switched to the MEDUSA PRO 869. Overall I'm quite happy with it as this front wing is doing amazingly well for its size. However I had a few occasions where I suddenly crashed, without any clear reason. When this happened I was going in a straig...

I own a Gong Hellvator ( http://gongsupshop.com/epages/box1707.s ... 5FOILHELLC ) that has a Chinook (deep) tuttle box with 2 x M6 screws...

I estimate the impact speed on 63.045 km/h