Thursday, 21 May 2015

Haven't given up yet!

So I tried the new settings, it didn't end well... After studying the video footage and doing some Googling it is now evident to me that the T-28 is tail heavy. This is probable due to all the epoxy holding the tail together.
I made a center of gravity testing jig and sure enough it is very tail heavy.
I decided to combat this by making a new aluminum motor mount plate and setting the whole motor forward 35mm from the original position. I weighed the plane and it now weighed in at a hefty 580g. It was apparently 470g when I got it.
With this extra weight I had to wonder if the motor/ prop /battery combo could even generate enougth thrust for it to fly correctly. I built a few more jigs and decided to test it.

 Here is the youtube video of the testing:
https://www.youtube.com/watch?v=S9hFqzHK1L0


So the results weren't good, I thought well if it is to fly then it will need to be at full throttle. I took it up again but this time at full throttle, it was still flying like its tail heavy, by the time I got it trimmed out it was so far away that I couldnt work out which way it was facing... I crashed again.

This has lead me to a slightly new direction, firstly I managed to rip 40g from the plane (about 10 from the tail) I also decided to paint it a more viable color so I can work out which way is up and I have some 3S batteries on the way from hobbyking. I figured if I am to add more nose weight, it may as well be Lipo batteries. I also destroied my landing gear in the last crash, so decided to make it a belly lander.