Flyer Mk. 1a Modifications

Описание

Base on experiments and suggestions that I have received from discussion forums (particularly the rcgoups.com 'Free Flight ' forum), I have designed some improvements to my Flyer Mk. 1 design, which I am now referring to as the Flyer Mk. 1a. I have had some decent flights with this new version of my plane, and you can see some of them at https://youtu.be/U_MD9a3IsKE. The Flyer Mk. 1a modifications consist of three new wings and two new propellers. The three new wings for the Mk. 1a have the same size and airfoils as the Mk. 1 wings, but the spar structure is different. The Mk. 1 wing spars extend from the bottom surface of the wing, but are not bonded very well to the top surface of the wings. This decreases the rigidity of the wings, especially for the wing design with the thin, under-cambered airfoil. The Mk. 1a wing spars extend in 5 mm long alternating sections from both the top and the bottom of the wings. This makes the spar bind to both the top and bottom wing surfaces, which increases the stiffness (and hopefully the strength) of the wings. This is especially noticeable with the thin, under-cambered wing design. The two new propellers have steeper pitches than the original Flyer Mk. 1 propeller. The original Flyer Mk. 1 propeller has a pitch of 260 mm, and a diameter of 200 mm, which gives this propeller a pitch/diameter ratio of 1.3. Both of the Mk. 1a propellers are also 200 mm diameter, but one has a pitch of 300 mm (for a P/D ratio of 1.5), and the other has a…