It turned out to be a gorgeous day here today, so I spent all morning and part of the afternoon at the field. With a little tweaking the DA120 is running better all the time. The surge is still there, but getting better as it breaks in. Leaning the low end helped, and narrowed the the spot in the throttle where the surge happens. It's had about a gallon and a half of fuel through it and it's running really good now.
The DA120 is a hungry little devil. I've had several 10 minute flights that have only had a few ounces left in the 32 ounce tank when I landed. The last flight today, with the tune closer had more than a 1/4 tank left, so I think it's getting a little better. My buddy Tony's 120 doesn't use anywhere near as much.
With the power and acceleration of the 120 getting much better, the airplane is much more fun to fly. I'm going to go through the Peter Goldsmith trimming guide and see if I can't get it to fly a bit better. It needs a bit of help in an upline, it pulls really hard to the left so it takes a bunch of right rudder to make a straight line. I'm also having trouble keeping a straight line in the third point in a four point roll.
I had a lot of fun with it today!
