Taking elevator servo off

During first 8 flights in one day I realised that I did not change tail angle much, and bird flew well. Also tail was pretty wobbly and shaking a lot during flight, because linkage between elevator servo and ruder servo had to much free play. So I temporary took elevator servo off and set fixed tail angle of attack.

After that I made four flights with my yellow bird, and all was fine. Bird was lighter 2 g because of 1 servo less.

See video here 

https://www.youtube.com/watch?v=IJA5C-ghj4s

How to make crank shaft

Most difficult part to make for beginners is crank shaft which lifting the wings. It is very important that is done very accurately to achieve wing symmetrical flapping. For my rubber band and RC ornithopters I use 10 mm rotation radius for wings flapping and 20 mm lever length on wings. It is 3D object bit difficult to imagine at first. At the end first radius and second radius must rotate at 10 mm radius. Second one is 7 mm but it is 70 deg in respect to firs one. If precisely measured and bent both wing should flap symmetrically  .

see picture 

I use 0.8 mm steel wire or they call it music wire. For RC model I used 1 mm wire because hole in the gear was 1mm. To properly design my ornithopter I used free software from this website.

http://ornithopter.org/software.shtml  It is very accurate ,when I finished my bird everything was exactly same as calculations from that free on line software. Thank you guys from The Ornithopter Zone.

My first properly built ornithopter

I have learnt a lot by doing previous experimental bird. So I decided it is time to make one with individual parts and gathered knowledge and experience. 
Parts i have bought from hobby on line shop.

Inexpensive 4 channel radio (transmitter) DSMX protocol Mode 2.

Receiver DSM2 four servos control and 2 ESC 2A. And of course some balsa wood, carbon fibre rods, glues, polyethylene foil, LiPo battery 180 mAh and 1.5 mm depron for the tail. So after one week of thinking, cutting, gluing and sweating. There we go !!. I will call it Yellow bird.

Now big worry. Is it going to fly. Calm day, well wind 5 km/h. Local park, moment of the truth.

See it on You Tube.

https://www.youtube.com/watch?v=kXasVewnuRY&feature=youtu.be

Not bad at all.