Maiden of Ryan
I decided to Maiden the Ryan today since it was a lovely evening, only 1MPH wind if that, The model was set up as recommended I didn't manage to get it videoed this time as the fellow club member couldn't make it.
Ailerons 15mm each way
Elevator 12mm each way
Rudder 300mm each way
C of G 100mm from the leading edge
On opening the throttle and holding slight up elevator, the tail raised within 2-3 feet so added more elevator but the tail would not come down and the fuselage stayed level at almost full up elevator (by this time it had gathered speed and started a very shallow climb out. (immediately I thought not enough elevator).
Anyway the roll rate was very slow but the model flew very well and very stable too, 10 minutes into the flight I reduced the throttle to 1/4 and tried the flaps, all was well no trim change as I had a elevator mixed in with flaps to give me 3-4 mm of down elevator when flaps were fully deployed. Soon after that the throttle stopped working I can go to full power but couldn't come down below half throttle. So I gained height for safety.
The only choice left was to wait until the fuel ran out and come in dead stick. 27 minutes later the engine cut. I used half flaps only for landing just to slow it down a bit and the landing was agreaser but that tail took ages to come down. Aha they have got the C of G calculations wrong I thought
I will investigate the throttle problem, but I measured the wing cord and the cord is 370mm therefore the C of G should fall at 123mm and not 100 mm as stated 23mm too far forward almost an inch.
That will account for the tail reluctant to come down, and the model almost wanting to tip on it's nose on take off, the model is nose heavy at 100mm This will also account for the not getting a good roll rate, so I will move the battery back by about 2-3 inches and go for 123mm C of G and test it again. It's so lightly loaded that it lands almost like a Piper Cub.
Alan H
BygglänkLänk