Light north to north east winds were forecast for last weekend and so I put the call out on Facebook to see where people were intending to fly as I wanted to give the Streamline 350 its maiden flight, and flying buddy Nigel came back and invited me along to fly at the Eglwysilan model flying club near Pontypridd, so how could I refuse.
Sunday was bright but windier than expected although the forecast was for the wind to ease during the day as I assembled the Streamline. One thing I did notice with the assembly was connecting the aileron servo wires together using the JST type connectors as the servo wires are too long and are difficult to tuck into the wing cavity. I could just cut the wires short and reconnect but it may actually be easier and a neater finish to replace the JST's with the MPX 6 pin plugs & sockets.
Eventually the wind eased and I couldn't put off launching any longer. Nick was volunteered to do the honours and I asked him to perform a power off throw, just to ensure that I hadn't got the all flying tailplane, (horizontal stabiliser), position terribly wrong, or anything else for that matter. And just to ensure the 1st throw wasn't a fluke, the 2nd throw was equally as good. So without further ado Nick launched the model and I fired up the motor and away it went, albeit a bit sluggishly, and she struggled to climb so I gave it full throttle, which it didn't like at all and the prop was making one hell of a racket, and after climbing to a safe altitude I turned off the motor and managed to gain a little extra height using natural lift before bringing her downwind and into base for a landing. I had plenty of room so I didn't have to worry about using CROW braking at this time and she landed well.
After chatting with the lads we decided that the 13" x 6" propeller was too big so I fitted a 12" x 6" and we did a ground run for about a minute, which was much better and with no sign of the ESC even getting warm, so with that we launched her a 2nd time. This was much better! She climbed steadily but was no rocket ship, which I sort of expected because I wasn't using the recomended motor, just one that I had spare in my box of bits that had been bought for another project, trying to save a few £, and this model is quite a heavy lump, (which reminds me that I need to try and find a way of weighing it). Anyway, I flew it briefly, testing the controls and concluded that my control settings weren't far out with only minor elevator compensation adjustments being required for the speed and thermal flap settings and CROW braking. On my landing approach I came in a bit high but CROW soon brought that down to land just a few meters from me.
I made some adjustments to elevator compensation and also added aileron differential, something I'd forgotten to do on my initial setting up on the transmitter and launched her for one final flight. Everything went to plan this time and I managed a good flight. For such a heavy model she doesn't lose height too rapidly at all, and although thermals helped her to maintain height, she wasn't climbing away in the thermals. Whether this was because I wasn't locking in to very strong thermals or because there weren't any strong thermals at this time in the afternoon, I don't know? I'm sure future flights will shed more light.
So the question at the end of the day was, do I splash out and purchase the recomended motor, along with the recomended 6 cell 5000mah LiPo to help with the climb outs or, do I leave it as it is? After all, I bought this model with the intention of flying it from the slopes on light/marginal wind days, and the motor is a get out of jail clause. But if I want to fly it on slightly windier days from a flat field then the extra pulling power of a bigger motor would be advantageous. After watching the video footage I took I decided to purchase the motor and battery pack. But this also meant I've had to also purchase a new battery charger as mine only charges up to 4S packs, but hey, it's only money, right!
So check out the video, hit the LIKE button and please subscribe to my channel and hopefully I can produce some more videos of this fine bird.