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Atom 6HV › Compass 6HV Quality (MAIDEN UPDATE!!)
04-20-2011 03:18 PM  7 years agoPost 41
ren

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Houston, TX

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+1 for up side down!!!

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04-20-2011 09:48 PM  7 years agoPost 42
JOLT

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Baltimore, MD

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I received the new ESC. The previous was bad. After soldering and some rewiring, the new ESC spooled right up.

The first flight was early this morning in the dead calm air. It was uneventful. My setup is sound and stable, only requiring a touch of trim while in a hover. It tracks straight and flies very light compared to what I am used too.

I expected a very touchy and fast heli. It is very smooth and extremely stable with no unwanted tendencies to wonder. Anticipating some maiden jitters/shakes, I used expo on the tail and cyclic. I was comfortable within a couple of minutes. The tail wondered, but I played with the gyro + throttle curve to settle it down- still a slight tolerable wag remains.

Some things I really like:

Stability
Size
Weight
It's very quiet
5 minute flight on 2 6S (3000mah 30C) Lipos and after a volt reading, it looks like I can get 7 minutes easy....this is a BIG PLUS for me.

One surprise was the quick low auto from 15 feet....MAN DOES THIS THING FLOAT FOREVER!!

Things I didn't like:

The defects that I had to replace. Some parts I got free from the distributor, others, I just said "Screw It" and ordered to get quicker.

I am keeping the "Artist Formerly Known as Terd" and I will be buying some more batteries next pay check. 3 sets just won't cut it.

One thing that occurred to me was that it doesn't fly like anything else. I have Align helis, but have been fortunate enough to fly a lot of different brands. It flies like nothing I have tried before. I guess it flies like a Compass....very distinct feel.

I want to clear something up for the record. I came off like a whiner --understatment, I know. But here is where I am coming from. I think that large helis can be very dangerous when out of control. Heck small ones too. I commit myself, on each build, to try and reduce the risk as much as possible. In finding as many careless QC defects as I did, I was very concerned with the reliability of the heli. I can identify and replace the obvious defects, but it is the things that I can't see other than through test flights, that really got my anxiety level up. The most important thing to me is confidence in quality. That was a concerning question throughout the build, but I feel better now. For what it was worth...

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04-20-2011 10:34 PM  7 years agoPost 43
Alexm0324

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Atlanta, Georgia USA

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I 'm glad to hear you like the heli now. I figured you might decide to keep it if you got to fly it.

If your tail is wagging, it is most likely binding somewhere in the tail. All linkages and hinges should fall freely if they are sized properly. I actually took the whole tail assembly apart and filed the forks on the grip arm linkages as well as the H arms to make sure they were silky smooth. The tail ball linkages ship pretty tight and should be worked over with a ball link sizing tool. They don't really wear in like you think they would. On the plus side they don't wear out easily either.

Enjoy!
-Alex

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04-21-2011 01:42 AM  7 years agoPost 44
JOLT

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Baltimore, MD

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i bought her a camera for Christmas. She tries and it keeps her busy, but out of the 50 pics she took, this is the only one worth posting of the maiden voyage:

Thanks for the tip on the tail Alex. I was thinking belt tension, but I see where you are coming from. I did resize the tail links to make it smooth and I checked for binding and didn't find an issue. This may take some time to sort out, but the heli flies very nice in forwrd flight -- so I can keep flying through the trouble shoot and "break in". I am eyeing up that nasty arc on the tail rod. I think I might replace that with the CF rod and ditch the guides. That set up looks like an issue that is contributing to my wag.

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04-21-2011 03:33 PM  7 years agoPost 45
Rogman88

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West Monroe, LA

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I actually took the whole tail assembly apart and filed the forks on the grip arm linkages as well as the H arms to make sure they were silky smooth.
I think this was the type of stuff that JOLT was upset about having to do to a new kit. If tolerances were correct this shouldn't have had to have been done to get the heli to perform as advertised.
Anyway, I'm glad you're getting it lined out JOLT. I too, had gone through my pain stage with my Logo and now on the back end of 20 flights now, I'm really glad I went through the process. Sometimes it's tough to see the light at the end of the tunnel when the tunnel seems longer than it should be.

High Voltage just works better

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04-21-2011 03:41 PM  7 years agoPost 46
Alexm0324

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Atlanta, Georgia USA

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I've had to work on every tail in every kit I've ever assembled to get the tail as free as I'd like. So it wasn't just the Compass kit for me. Sometimes it's just working on the ball links with a sizer (to be expected), and sometimes it takes more. When I get the tail right on any bird there is no slop, but every hinge or link falls under its own weight.

I too thought about doing the carbon rod as JOLT mentioned. I don't have any issues with the wire tail pushrod at this point, but prefer carbon. You can use the carbon pushrod kit from Century. I'd like to try and retrofit the rod assembly from the N5, but have not looked into it yet.

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04-21-2011 05:49 PM  7 years agoPost 47
Rogman88

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West Monroe, LA

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I went with quick uk carbon rod on my Rex 600 ESP. It was nice not worrying about guides getting turned sideways during transport. Was it worth the extra $. Meh, I don't know...

High Voltage just works better

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04-21-2011 09:59 PM  7 years agoPost 48
Razz

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Louisville, KY

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Use Furion tail pushrod guides and wire-for 6HV
On my 6HV build, I used 3 Furion 6 tail rotor pushrod guides #MA 128-144 and the MA pushrod wire(part#?). The wire comes with 2 links which fit the compass steel ball perfect. I cut 2mm off each end of the wire to adjust length. The wire is also thicker by .010, which makes it stiffer.

By using the Furion 6 tail guides you will lower the wire by 3 to 4mm, having much better alignment with the tail servo. The guides are a semi tight fit, just heat them up a bit, and slide on the boom. Just add a little thin CA glue to the guides, and they will not move.

DX8, Ballistic FSO, Gaui X5, Warp 360, Vbar

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04-22-2011 02:49 AM  7 years agoPost 49
JOLT

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Baltimore, MD

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^^That is an excellent idea. It seems to get the geometry better aligned with the rudder servo horn.

I got another 3 flights in today. I had a real nice time with it and I am very happy about 7 minute flight times. I have the timing at 15 deg on the esc and I think I might just dial it back one more notch to reach for eight minutes. It tracks like it's on rails. Autos are carefree with room for error without making you pay.

I really enjoy extended graceful flights and the 6hv seems to fit the bill.

I think I am going to order the CF tail rod kit. Seems like a good investment. I did take the tail apart to give it a once over under bright light. Everything is free and as loose as I am comfortable with. No binding on the slider. Played with gyro gain and belt tension. Still has a wag that seems to come and go.

I would like to give it another 5 flights before making any mods. I have had some birds that took a little "Breaking In" and the 6Hv seems to get better each time up -- could be that I am just getting more in tune with it. I will be taking it with me to visit my dad this weekend. He has a large field near by. I will have a chance to ring it out a bit and hopefuly can get my dad to take some video.

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04-22-2011 04:00 AM  7 years agoPost 50
petmotel

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DeKalb, IL.

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Tail Wag
A quick thought on the tail wag. On some of the 3Ds, there was a problem with the thrust bearing where the OD of the smaller thrust bearing was too large, and binding in the grip. In this instance some ground a bit of material from the OD, while some just replaced the bearings.

I've not seen anybody posting about newer kits with this problem, but I can see the possibility of thrust bearings with the seperate size diameters being wrong/or in the wrong position. Given the attention to detail (or should I say lack thereof) often found in Compass kits, might be worth a look see.

FWIW, I've not come across this situation with any of my kits, but most of them I replaced the tail grips with QUK pieces.

Jay

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04-23-2011 12:46 AM  7 years agoPost 51
JOLT

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Baltimore, MD

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Is it a matter of removing the tail thrust bearings and matching them up to make sure they are the same size?

I still can't find the solution to the wag. 4 more flights.

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04-23-2011 01:38 AM  7 years agoPost 52
Rogman88

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West Monroe, LA

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So JOLT are you feeling overall better about the heli now? Is it going to be a keeper after all or is the jury still out?

High Voltage just works better

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04-23-2011 02:31 AM  7 years agoPost 53
petmotel

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DeKalb, IL.

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Tail Grip Bearings
I would post a pic, but my internet connection (satellite) is at a crawl right now due to the weather.

The thrust bearings consist of two different sizes of shells, and the caged bearings.

From the hub, outwards to the blade, the stack should be as follows; first is the wider of the two radial bearings, next is the thrust shell that has both a larger OD, and larger ID that travels with the grip. Next is the caged thrust bearing itself, then the smaller OD, AND ID shell that does not move relative to the grip. Then there should be a small shim washer between the thrust, and the outer radial bearing.

If you remove the tail rotor, remove half of the tail grip, you can check to see if it's correct. Hold the hub stationary, pull out on the remaining grip half and rotate it. It should be silky smooth. Both radial bearings and the inner shell of the thrust bearing should move with the grip half, and the outer thrust shell should only move if the hub is rotated. There should be a very slight amount of gap on the outer thrust bearing between it's outside diameter, and the blade grip half.

If the outer thrust shell moves with the grip, or the movement isn't VERY smooth, that would be a problem, and needs to be corrected.

Jay

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04-24-2011 04:09 AM  7 years agoPost 54
JOLT

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Baltimore, MD

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Yeah Rog, I'm keep'n it. If I had to do it again, I would still have bought it. I was at the end of my rope with the bad ESC. If that wasn't the final defect before flight, I would have gotten out of the project. It flies very nice. Little things here and there that need to be worked out over time are expected and ok with me.

I did have a chance to disassemble the tail grips and the thrust bearings seem to be correct and working fine. My problem lies in 1 of 3 things:

My GP 780 Gyro
DS 650 Tail servo (Running 5.25 volts thinking about bumping up to 6 volts on the WR Hercules BEC--and by the way a fantastic BEC!)
The tail rod guide and set up

It's not dialed in yet, but my confidence is growing and the heli is "Sublime". By that I mean, you don't have to think about the sticks when flying it. It just goes where you think it to go. I read a comment that someone wrote about having to stay one step ahead of it, which seemed to be a negative for the former owner. I don't feel that way at all. Then again, mine is flybarred, and I understand most have the flybarless version.

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04-24-2011 06:25 AM  7 years agoPost 55
RAK402

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Alhambra, CA

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Jolt,

I am very pleased you have it flying and are enjoying it.

I would suggest upgrading the gyro first (GY520 or Spartan) then, if that does not work, a JR8900G tail servo.

Team KBDD/Compass Team Manger/Experience RC/Team JR Americas/WR Field Rep

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04-25-2011 05:16 PM  7 years agoPost 56
Rogman88

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West Monroe, LA

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Having been through similar growing pains, I can now say to you that the fun is just beginning. As I'm getting used to my new heli it gets better with each flight. Coming fron Align helis, it's different and pleasant to fly something else that flies really well. Enjoy your new heli!

Roger

High Voltage just works better

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04-26-2011 06:26 AM  7 years agoPost 57
JOLT

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Baltimore, MD

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Thanks Rak and Roger!

And to echo the sentiment, it does feel good to step outside the Align bubble to experience something else and learn from it. Align has done a great job at catpuring a majority of the market, but in doing so, their helis are so easy to assemble that the fundamentals can go right over your head.

I have figured out the wag. In the past, I have found that a tail wag can be such a PIA to trouble shoot since it can have so many causes. The obvious (The Gyro) is always the first to suspect. In my case, the wag was caused by two simple things.

1. My flybar paddles were not the same distance apart. And when I got them exact, I still had to balance the head with tape.

2. I had set up the tail to be dead center on the servo at 0 pitch. Going to 7 degrees positive at dead center gave me a more even throw forward and back. Apparently, the way I had it set up, to get full right rudder, I was pitching the servo horn all the way back and putting a lot of strain on the rod (Flexing hard in the guides).

Now I have a nice even piro rate left and right and less dancing on the skids at spool up due to the out of balance head. She's nice and smooth with no wag.

I am fighting the urge to trade up the stock main and tail blades for some Edge replacements. The stock mains are a work of art IMHO, but they play a disappearing act in the air at times.

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04-26-2011 07:16 AM  7 years agoPost 58
RAK402

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Alhambra, CA

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Jolt,

You are most welcome.

One of the Compass Team members (not me) took the stock main blades off and tried the Edge blades. I was very interested in this as everyone is showing up with Edge blades on their machines.

After a few flights, he took them off and put the Compass blades back on (he liked the way it flew better with the stock blades, which were designed for it).

Again, I have not tried the Edge blades myself, so am not qualified to comment on them.

I am running the KBDD Extreme Edition Tail Blades on mine now, having flown the stock tail blades initially, then upgrading to the standard KBDD's, then the TWEE's, now the EE's (quieter, sharper, quicker, and more precise).

Keep flying and keep us posted sir!

Team KBDD/Compass Team Manger/Experience RC/Team JR Americas/WR Field Rep

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04-26-2011 07:24 PM  7 years agoPost 59
JOLT

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Baltimore, MD

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Hmmmm, thanks for that feedback on the Edge blades. I appreciate that and it was enough to keep some cash in my pocket.

I have bought many a set of blades that have had 2-3 flights before selling used to a very lucky RR member--when I found the stockers to be better.

I think I may get some holgraphic stickers for the main blades. I am not a big fan of junk on the bird, but I like to see that disc when doing tic tocs and flips.

I will have some video up after flying this weekend.

I apologize to anyone that may find my keeping this thread alive annoying. Just trying to keep some movement in the RR Compass section through my new and humbling experiences with this heli.

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04-26-2011 07:34 PM  7 years agoPost 60
Alexm0324

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Atlanta, Georgia USA

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I run the KBDD lime green dampeners in my FBL 6hv along with the stock blades. I tried Edge Blades and used to swear by them as the only blades to buy. I now only buy Compass blades. Edge is 603mm and Compass is 615mm. I can actually feel the difference of the extra 12mm. You also can't beat the price on the stock Compass Blades.

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