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I’m running the 1100 admiral. I bought two of them last year when I bought my A-109. After I put the mechs into my MD500e and put a 5 blades head, I haven’t had anything to use them in. So I bought the UH-1 with the intentions of being able to use the two 2200 6s batteries just sitting in my box.
gravyComment
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Flight went well. Need to make some slight adjustments to the pitch curve I think. It was a little jumpy. Other than that and the Harmon isolation sound coming from the fuse. I think it’s good.
gravyComment
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Nice Gravythe clown. Your recent postings have got me to pick up this project again (got an original April 2019 huey).
During spool up and up to the point where you went to the higher headspeed (idel up 1 rpm?; but before lift off), there wasn't that harmonic. Maybe you could try lowering the idle up 1 a bit to see if it helps?
Also, you could try some more hovering to see if the harmonic exits at all times. Your vid was mostly forward flight and I could hear that harmonic. It almost sounded like a fast tail wag but hard to see. Could be from too high a tail gain setting.Comment
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I got it worked out today. Had the day off so worked on it and am happy with it now.
I first thought was like you said lower the head speed a little. So this morning I started out by changing from rpm mode to simple governor mode. This way I could play with some different head spreads. So after that was set I did some test flights and ended up where I was really happy. This was all done with
out the front canopy on. Then when I was happy I added the front back on. She got bouncy and vibration sound came back. So what I noticed was the front swash plate ball links were rubbing up agains the fuse. So I got the Dremel and standing bit and cleans up the area. No more rubbing and no more jumping or vibrations. She flies great now.
GravyAttached FilesComment
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Great that you figured it out. I'll have to keep that in mind once I start flights with the fuselage on. I'm still putting flights on the mechanics and tuning the setup to my liking.
Do you know what head speed you settled on?
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Punching the numbers into head speed calc looks like I’m running roughly 1600 for idle up (40% throttle) and 2500 for flight (65% throttle).
gravyComment
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Anyone have a source for some decent decals? I have this Huey and the decals that it came with keep rubbing off/tearing when brushed up a against or even lightly touched.
DannyComment
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I have the UH1 from MotionRC. What Trex 450 model/version does one need to use when looking for replacement parts, such as, the tailrotor pitch assembly or bell crank? I have looked at various websites using various Trex 450 model numbers and can't identify which model number directly correlates to the parts used in the MotionRC Rotorscale helicopter.
DannyComment
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Anyone know the pole count on the stock 1800Kv motor? Can seem to find it in the docs. Installed the tail pushrod mod today and the talon 60.Comment
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I believe it’s an 8 pole. I used 8 and low timing for both of my motionRC 450 helis.
gravyComment
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Flew mine this weekend again. I feel really good about her now. She flies sweet, no need for further adjustments now.
GravyComment
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I think it’s more of a tarot clone. I have used align gears though, main and auto rotation which I like. I did find some main shafts on ebay that were ok. 1 out of 3 were straight. I bought 2 packs of 3, so I have 1 good spear now.
gravyComment
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So got my DX9 back from Horizon and was able to test fly today. Had really bad tail wag, which I was able to fix with the gyro gain. But still have a bad vibration during spool up and in flight. I'll prolly take the main shaft out and check to make sure its true. BTW, running on the 4S with a talon 60 at 1600 RPM. Motor was a bit warm.Comment
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