600 Uri's Big bird build journal

murankar

Staff member
Yeah it got to late last night. I do have pics so dont worry. I finished at 2300 or about with the structural build. I had to grind my motor shaft because Scorpion put the flat in the wrong spot, No big deal. On the main bearing block; the cap that holds in the spacer for the main shaft, well I had a hell of time with that mentally. I thought I was stripping the screws so i set it aside. Went back later and said screw it and put the screws in and DONE. The head block kinda got me a bit too, really it did. So I got it all back together and tight, blade grips wouldnt move at all. I pinched something in there who knows what. Tore it down again and rebuild everything works as it should. Now the bearings feel notchy. Anyhow by the end of the night the head block smoothed out. The tail boom was another chore, the push rod guide wanted to fight the screw big time but I managed to get installed. I really have to get used to the tail pitch slider. It looks like there is a missing joint in there some where. Electrically the motor and gyro are on the kit and thats it. I have to get the servos setup, gyro registered and bound, charge my RX pack and get the Ultra guard setup. So I still have a lot to get done.


P.S. I still have to epoxy the push rod and reinforce the ends with floss and CA.
If the forum does not pitch a fuss I will up load the images during class. There seems to be a 3M limit on file sizes for up load.
 
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murankar

Staff member
Okay So I will need to upload later on at lunch. I will have to post process to get the file size down a bit. It appears my images are a bigger than the server wants.
 

Tony

Staff member
Try uploading them now. All files set to 2mb instead of just 1mb, and I have removed the size limitation. For now.
 

murankar

Staff member
If I want to fly next weekend or sooner I will have to order the revo packs. I like the price and the weight while being heavier they are by far one of the most "Common man" based on price. I have the potential to save almost $100 or so dollars on the packs.


Where I stand right now is I just finished shortening the servo leads at lunch time. Last night I built the push rod, wrapped the ends in embroidery thread and soaked with CA. I then installed the rod and made an attempt to program the tail servo end points. I also placed the ESC on the ESC tray, ran the cables and trimmed the extensions to length and re ended the wires. I installed the Ultra Guard ran the needed extension wire for FBL power backup but it still needs and end put on. I am also thinking of trimming the power lead on the ULTRA Guard. I am close to being done on the wiring on her. As for stripped screws at this point I have one, its that tiny screw that mounts the Nylon bolt lock. Not sure how thats going to hold, after Bert Kammerer built his 500 on video he stated it really is not needed but makes good for security just in case. The Neo is mounted, registered and the keys file downloaded. The computer software is talking to the gyro and of course the radio is talking.

My flight pack is going to be in the front with the main flight packs. I have and extension ran but needs trimmed to length. The wiring on the under side needs cleaned up. I am thinking of just taping the wire into the wire guide with black electrical tape/ grounding tape.

The tail servo is not dead on center but as it sits I have full travel on the pitch slider so I am not concerned about it. I still have to center the cyclic servo arms. They were fairly close after initial centering and installing the servo arms. They are close enough to not need to worry about it but I will go ahead and properly center the servos anyways. I want to get as close to a dead perfect setup as possible.


Finally I am deciding on either 13 or 13.5 degrees of pitch. The kit is rated for 12 - 14 degrees. Then I have to settle on a proper head speed. I am thinking of between 2200 and 2400 as my range. The stock pinion on my setup will do this no problem. If I can get 5 minutes ill be happy. Anything less is still open for discussion. I will see how I feel after the kit is broke in. I am thinking of doing pack break in while flying the 570.

will be hammering out more photos once I am done. I take some detailed pics of my setup so you all can see how I solved my issues.
 

Smoggie

Well-Known Member
Sounds like you are making a very nice job of the build. Personally I'm too lazy to shorten servo leads, i just fold them if they are too long. The goblins tend to have plenty of space to tuck a bit of extra cable away so as not to be too unsightly... But I admire those who want to make that extra effort to get it super neat!

It will probably be very aggressive with 13.5 deg pitch, but you can always soften it with the pitch curve. I originaly used 13 degree on my goblin 630 but when I put the wide chord 660mm blades on I reduced the pitch to 12 deg, and it's stick very aggressive at that.
 

murankar

Staff member
Thank you yes it's going smoothly. Once the structural stuff was done I slowed it down and now it's stretch it out till the packs come in.



I had so much wire crammed away that I had to. The wires on the bk servos are on the thick side of the things. So with 4 sets of wires things were cramped. It was difficult to run the rx pack extension and the extension for the ultra guard. I figured these servos are not coming unless the die.

So I got the scale today. It's goes to 22 lbs and does both empirical and metric. I am excited to work out the disk loading. Now that it's together I don't want to take it apart.
 
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murankar

Staff member
The cruiser weight, the reigning champion coming in at 2788 grams or 6.15 pounds after adding in flight packs. Yes that right 6.15 pounds after adding in packs. Now that weight does not include connectors. I I could in theory reduce the weight by a couple hundred grams by replacing the motor and esc along with switching to a BEC or going non opto. Anyhow that's where Elinor sits as of right now.

After a behind the scenes chat I had I decided to order 4 Pulse ultra 45c 3000 packs. This is to get me through until the 3300 come into stock. I tried to get 2 more battery trays but Heli direct once again had stuff listed as being in stock when they were not. I also forgot to change my shipping address and sent an email right afterward and they were johnny on the spot to fix it for me. Kudos to them. They keep surprising me.
 

Tony

Staff member
I would just do all 3000's. You are going to see virtually NO difference in 300mah. Remember, in series, the mah stays the same.
 

Smoggie

Well-Known Member
I'd be surprised if you can't easily do 5 minutes or more but a lot depends on what headspeed you run. The nearest examples I have are my Dune 600 and Trex 600 Pro. I fly them on 2700mAh or 3000mAh 12s packs and they both easily exceed 5 minutes on either size of pack, and I think they are both heavier helis than your 570.

I'm running about 2000RPM or so for general sport flying, higher RPM gobbles up the battery quicker.
 

Tony

Staff member
URI's a hover master so he should get about 15 minutes out of them with low head speed lmao. :poke:
 

Smoggie

Well-Known Member
FWIW here's my Dune 600. The video into says 3000mAh batteries, but I fly the same time on either 2700 or 3000mAh. This flight was 6 minutes:

So you should have no trouble at all getting well over 5 minutes out of the 570.
 
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murankar

Staff member
Dude I lay the smack down with my smack hover skills. I make Heli Masters say "WHAAAAAAAAAAAAAT"! Well when the batteries and wire get here we will find out.


I also added 4 more images to the Goblin 570 album.
 
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