Nailed the CG with no adjustments! Came in a 7.7 lbs dry, much better than the 10 lbs of versions 1 and 2 that had the tail servos in the tail, requiring a lb of lead up front, and weighing in at 10lbs. I am optimistic this one is a keeper.
I kept referring to the Evo 10cc as a "single needle carb, but I had forgotten that there is the obvious HI sped needle on the port side, and the low speed needle is tucked into the center of the carb vent barrel on the starboard side. I rediscovered this last night as I kept wondering why the manual refers to both needle settings. I saw the engine diagram and slapped my forehead (not really, I was in bed and I sat up). I had forgotten all about it.
Today I set the HI at 2.5 turns, ended up tweaking it once to about 2-1/4. It screams with the 11x6 Master Airscrew Scimitar prop. Keeping the throttle at about 1.5 mm open at idle, I tweaked the low speed needle leaner, no idea where it ended up, and I found this to be the best I can get. Clean initial slam with a small stumble just before peak rpm, quite acceptable. Reliable and no thrust generating idle, and a screaming full throttle.
I am pretty sure that the recent crash of the Alpha Sport 450 bent the engine shaft almost imperceptibly, enough you can see a wobble, not enough to affect performance. I decided this needs perfecting. And therein lies my latest frustration with this hobby: finding parts. Why is this so fucking hard?
It has an aluminum nose cone that can with a 4mm to 8mm prop adapter with a threaded center hole for the M3 screw that secures the nose cone. China doesn't even sell these. I have to buy a whole new nose cone, about $20 on Amazon, with its own adapter. I could use a 4mm to 6mm adapter and a spinner nut that has the same M3 hole, but none of the 4/6 adapters tell you how long they are. I need 30mm. I bought 6 4/6 adapters on Amazon, the same ones that you see everywhere, and they are 25mm long, so they can't accommodate a base plate for the nose cone. I hate the bullet ends these come with, suitable for drones and tiny planes, but not on a 450 size. Doesn't matter for now, the current nose cone adapter is not bent, but it annoys me I can't have spares.
Okay, moving on. Replacing the 4mm x 49mm c-clip end electric motor shaft on this DY2836 electric motor (same as I need to replace on the original motor). Not in America you don't. Took some looking and on Walmart, selling for a Chinese vendor, I found 4mmx50mm c-clip end shafts at a reasonable price, but they are still two weeks out from arriving. I ain't got time for that, but they are on there way, and I need two now
So I did what every RC addicted boy does and just ordered another DY2836 880kv motor from Amazon and it will be here tomorrow.
Look, I just want to get this thing flying right, get my thumbs retrained, get used to the field, improve my confidence, so I can maiden the Ultrastick. I am confident in that I wasn't the cause of the last crash, and I managed a lot of crazy attitudes in the bad winds before that crash. But I want some clean flights under my thumbs before then. Matching up weather and my days off hasn't been in the favor of flying, which is probably why I chose poorly to try to fly in those winds last Sunday, but I am sure that day will come, hopefully with no one else at the field (I hate an audience).
OH, BTW: THE engine has a bit of low end resolution, but once the throttle gets to 50% it's pretty much screaming at full throttle. I tried a Throttle curve and it worked nicely to smooth the power curve. I may lower it in the mids a bit more.
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