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

[eawings]

Rotorscale 450 UH-1A Medic I did for Mr. Danny Rice, Washington flown Saturday using 50A Castle Creation ESC with 13T Pinion on 4S Lipo.

[RCFlyer51]

Flew the last tuning flight on my UH1 today. I am using a 4s 2200 mAh battery and a Spirit flight controller. I get about 7 minutes of flight with about 1100 mAh left in the battery. The helicopter flies very well, hands off hover in a no wind situation. I would include a video, but can't seem to get one to be accepted. Here is the youtube link.

https://youtu.be/W6BT24GU1Ys

Danny

[CM_Aero]

GOV controlled by Talon60

[RCFlyer51]

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.

Are you using the ESC gov or a straight throttle curve?

Danny

[CM_Aero]

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.

[RCFlyer51]

The frames/belt/boom/tail/gears/gearbox are. The main shaft and head are different though.

Good to know. Do you know what main shaft and head are used or which would fit? I assumed the Tarot 450 sport was most likely the version, so, I have ordered a couple tailrotor shafts and a bell crank. The plastic bell crank on mine is very sloppy.

Danny

[F106DeltaDart]

Do you think it is the Tarot 450 sport? I am just trying to get a source for replacement/upgrade parts.

Danny

The frames/belt/boom/tail/gears/gearbox are. The main shaft and head are different though.

[Gravythe clown]

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.

gravy

[RCFlyer51]

I believe the mechanics are a clone of the Trex 450 Sport V1.

Do you think it is the Tarot 450 sport? I am just trying to get a source for replacement/upgrade parts.

Danny

[DCORSAIR]

Flew mine this weekend again. I feel really good about her now. She flies sweet, no need for further adjustments now.

Gravy

I got to see Gravy fly his, very impressed with the looks and how it flew, I know he did a lot of work to it to make it fly better, to bad it doesn't come ready to go like its supposed too, it did fly sweet though.

[Gravythe clown]

Flew mine this weekend again. I feel really good about her now. She flies sweet, no need for further adjustments now.

Gravy

[CM_Aero]

I believe it’s an 8 pole. I used 8 and low timing for both of my motionRC 450 helis.

gravy

Sounds good. Thats what I put into the talon. Gotta wait till I get my DX9 back from Horizon so I can test fly it.

[Gravythe clown]

I believe it’s an 8 pole. I used 8 and low timing for both of my motionRC 450 helis.

gravy

[CM_Aero]

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.

[F106DeltaDart]

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.

Danny

I believe the mechanics are a clone of the Trex 450 Sport V1.

[RCFlyer51]

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.

Danny

[RCFlyer51]

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.

Danny

[Gravythe clown]

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).

gravy

[Tron]

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?

[Gravythe clown]

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.

Gravy