Official RotorScale UH-1A Medic Green 450 Size Helicopter Discussion Thread

[Tron]

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.

[Gravythe clown]

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.

https://youtu.be/Qw4CcB7uJR4

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[Gravythe clown]

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.

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[CM_Aero]

Well tomorrow I’ll giver her a good shake down.
got my Talon60 today and installed it. My rpms are 1500 for ideal up and 2300 for flight. Did a test hover outside of fuse and all was good. Put her back in and buttoned it up. Did a test hover then in the fuse. Sounds like some fuse vibration. I might add something to lock the frame in, in the dog house. We’ll see after I put her through a good flight.

ill report back tomorrow.

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Awesome, looking forward to hearing how it flies. What battery did you decide to go with?

[Gravythe clown]

Well tomorrow I’ll giver her a good shake down.
got my Talon60 today and installed it. My rpms are 1500 for ideal up and 2300 for flight. Did a test hover outside of fuse and all was good. Put her back in and buttoned it up. Did a test hover then in the fuse. Sounds like some fuse vibration. I might add something to lock the frame in, in the dog house. We’ll see after I put her through a good flight.

ill report back tomorrow.

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[Gravythe clown]

The tail mod works wonders.

here’s what I have on the emax servos.

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[CM_Aero]

Removed the mechanics from the fuse today and adjusted the belt tension. Now it rotates a lot better. Installed the Microbeast and took it for a test flight. Major tail wag. Going to mod the linkage per the suggestion and see what happens. Talon 60 on order as well. Note: CHECK ALL SCREWS! A ton were loose and without thread lock. Thats why I asked a few days ago if these are flown at the factory as stated by MRC.

Anyone know the correct programming rates for the servos? Can't seem to find that info. Thanks

[Gravythe clown]

Ordered a talon 60 for mine. So when it comes in mine will get put back together. Can’t wait to give her a full shakedown.

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[Gravythe clown]

Guys you haven’t, do the tail mod F106DeltaDart did. It made all the difference in the world. My tail gain is right where all my 450 microbeasts are at now. Between 27 and 30 and rock solid. Also now that my tail is under control I can see it working on 4s as I tried it at 50% throttle on 6s and I hand good tail control.
im going to get a talon 60 before I put it all back in
I also made some shims so when I put her back into the fuse it will sit level instead of leaning to the left.

she’s going to be a sweet flier.

Gravy

[BWR]

Here’s a pic of the ESC that came with my Huey. It says 4S. Also, the website said The microbeast was preinstalled and when it arrived, it wasn’t there. I also saw the price on the website decrease and the description change which made me annoyed. Then I got another email saying the microbeast had shipped with a credit on my account. So there are issues going on. Not even sure if I have the updated components inside per the item description. Got the email regarding the battery and created a ticket. Haven’t heard back.

🙄

[F106DeltaDart]

That is great to hear. Obviously the 4s 2200 fit ok, CG wise and added weight. How was the temp of the battery after the flight?

Danny

Was no problem to fit within the GW/CG envelope of the aircraft. On 6S, I actually did have to add a decent amount of weight to the nose to get it to CG on the mast. Remained exactly on the mast with 4S.

4S is all I've ever ran in mine.

Awesome! I think that’s going to be my preferred route for these 450s as well going forward.

[TiredIronGRB]

4S is all I've ever ran in mine.

[RCFlyer51]

Had the chance to take up the Huey on a 4S 2200 this afternoon and it flew great! Bumped up my throttle curve a bit and had no LTE issues. Even tried down some pretty fast sideward flight in both directions without any blow outs. I think most of the LTE issues came from the high pushrod friction.

That is great to hear. Obviously the 4s 2200 fit ok, CG wise and added weight. How was the temp of the battery after the flight?

Danny

[F106DeltaDart]

Had the chance to take up the Huey on a 4S 2200 this afternoon and it flew great! Bumped up my throttle curve a bit and had no LTE issues. Even tried down some pretty fast sideward flight in both directions without any blow outs. I think most of the LTE issues came from the high pushrod friction.

[Gravythe clown]

God luck on your UH-1 guys.
Gravy out.

[Gravythe clown]

That’s the stuff I used for the mod. For 4S, you might at least be able to go to a higher tooth count pinion. That would buy a bit more headspeed. Haven’t had the chance to try mine on 4S yet, but it’s on the list at some point.

got the 504 pack today. Looks like the only difference is it 48” instead of 30”. So I’ll start on that if all goes good this weekend.

thanks again for the heads up.

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[F106DeltaDart]

The manual for these helicopters said they were test flown at the factory. Is that true?

The first batches were, but I don't believe that is true for the latest version. They were originally supposed to include an open source quad control board, but that plan ended up being cancelled due to issues with said controller. The factory still does the basic setup (centering servos, adjust linkages, balancing blades, ect) but I don't believe they are test flown any more.

[CM_Aero]

The manual for these helicopters said they were test flown at the factory. Is that true?

[F106DeltaDart]

https://www.towerhobbies.com/cgi-bin...RoCIyUQAvD_BwE

Thanks
Gravy

That’s the stuff I used for the mod. For 4S, you might at least be able to go to a higher tooth count pinion. That would buy a bit more headspeed. Haven’t had the chance to try mine on 4S yet, but it’s on the list at some point.

[CM_Aero]

IMO You might want to contact motion about that. Not sure if that is going to work. That put the head speed at 2400rpms with only 10% headroom. When I flew mine at almost the same rpms 60% throttle in 6s I had LTE really bad.

To go 4s it should have a much higher KV. I’ll be curious to hear your flight results.

gravy

I'll let you know. FBL unit just came in today. Need to take the fuselage off to go over things b/c like others have mentioned, rotation is tight.