This morning I had the DC-3 out again at the field, this time with a revised centre of gravity. The instruction manual indicates 60-65mm and I've been flying at around 60 which clearly doesn't work.
To correct things I moved the battery 30mm forward which put the cog at pretty much 65mm. Not exactly sure how much difference this was going to make, I left the flap setting and elevator trim unchanged just to be on the safe side.
The takeoff was good, the Dak easing off much more easily now, then started to climb and didn't stop until it was pretty much trying to go vertical. So, clearly, the mass shift makes quite a bit of difference.
After a little panic. I managed to the Dak straight and landed, then I reduced flaps and the elevator trim before trying again.
This time things were much better, wing the Dak cruising around happily. It's still too nose-down to glide very well, making me think I'll ease the battery back a centimetre or two and see how that goes...
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