Front view of the plane: symmetrical, wings are level, tail is straight, the vertical tail is perpendicular to the horizontal tail
birds eye view, straight fuselage
view under the left wing
closer view of frontal fuselage and right wing
center of balance without the weight
center of balance at the two holes, determined by weight placement
I first rebalanced my plane outside just to check the weight placement
Video of first flight
I saw that my glider flies straight but sharply down into the ground and doesn’t get a long glide. It matches “The Dive” problem on the chart, which means it is likely because the glider is nose-heavy (the center of gravity is too far forward). To correct this, I tried to shift my nose weight slightly backward.
Moved the weight back a little
Video of second flight
I saw the same issues in my second flight, where the glider still dove straight down, which means it is still too nose heavy. I realized there may have been some confounding variables affecting my results; for example, when I was testing the weight's placement, wind could have influenced the pitch and made my observations less accurate. Before my next attempt, I made sure the change I intended to make (moving the weight back) was actually measured properly.
Rearranged the weight again accounting for wind
Video of third flight
On this attempt, the glider showed improvement as the dive was much less severe, with noticeable reduced straight-down motion. It also made it further out from the ledge. Following Mr. Dubick’s suggestion to move the center of balance further back, I trimmed the elevator slightly upward and shifted the nose weight accordingly, as recommended in the troubleshooting chart. I was initially hesitant to make this adjustment in addition to repositioning the weight, but by this point, I felt confident in my ability to balance the glider and add a new change.
Weight moved and elevator trimmed up
Fourth and best flight
This was the glider’s best flight across all the trials. As it neared the ground, the pitch increased slightly, allowing for a short length of glide. However, the glider also began to curve to the left, showing signs of a banking problem. I may have accidentally shifted the tail while adjusting the trim. Alternatively, it could have been a result of a gust of wind, as it was a fairly windy day.
Having Andrew fly this one for me also made me realize that my glider throwing skills might have affected its flight, to an extent. Looking back, I did tend to throw up a little bit, but not to the point where it sabotaged the flight.
If I had more time to make further adjustments and conduct additional flights, I would experiment with realigning the rudder and checking for any wing warps to correct the left turn, while further tuning the elevator angle for a longer, smoother glide.