rrTV-PHOTO   New HD TV
HOME   rrTV-PHOTO   GALLERIES   MY GALLERY   HELP-FAQ
myHOME PM pmRR MEMBERS 405 ONLINE 19 EVENTS SEARCH REGISTER  START HERE
 
4 pages [ <<    <     2      3     ( 4 )    >    >> ]1122 viewsPOST REPLY
Fast Lad Performance . Ace Hobby . Esprit Model

.
.
e-E-Sky Honey Bee- Lama- Belt CP- E-Smart > Blade Tracking, Again............URGH! - SOLVED!
 
 
Gregor99
Elite Veteran
Location: Western Wa

Quote 
When you check the tracking, does the "high" blade become the "low" blade with negative pitch...

Yes, that is a good question. My tests so far have been with zero to hover pitch. I haven't tried the negative pitch test but I'm guessing with that amount of movement, that yes, the high blade/low blade will swap when I go from + to - and back. I'll give it try as soon as I have time and report back.
01-22-2008 05:02 AM
 
 
Gregor99
Elite Veteran
Location: Western Wa

Quote 
When you check the tracking, does the "high" blade become the "low" blade with negative pitch...

Got a chance to test this today. Sadly enough this was the first time I've ever put the heli in idle-up. Doing so on the ground made me a tad nervous. After a check, re-check and triple check of the pitch and throttle curves for ST1 and and ST2 (good be safe in case I get excited and pull the mode switch back a little too far) I powered it up.

Headspeed in idle-up seemed significantly faster even though it was only about 10% more throttle at mid-stick. The additional headspeed caused the tracking to behave much like it was with the 11t. The gap was about 1/2 and inch and the airframe was shaking like crazy. As I moved to negative the gap reduced, almost touching. By the time I got to full negative (100% throttle), the blades were almost tracking perfectly. Back to just above mid-stick and they seperated back to 1/2 an inch.

I suspect that if the blades were closer together at mid stick they actually would swap the high and low blade when the collective goes from - to +.
01-23-2008 01:01 AM
 
 
tutelar-rc
Key Veteran
Location: Nobleton, Ontario - Canada

The good news is that this is probably caused by slop - mostly on the one side of the head... you have confirmed that your linkage setup is the same on both sides of the head, right?

You could split the difference with the previously suggested adjustable linkage, and be in a fairly decent flyable position until your new/upgrade parts arrive.

Happy Flying!
01-23-2008 07:08 AM
 
 
Gregor99
Elite Veteran
Location: Western Wa

Thanks. Yes the linkage is configured the same on both sides. And one side seems to have a slightly stretched ball link. This is what I recently discovered and mentioned earlier this week. The head was crashed once and this is likely when it happened. I don't get to fly during the week and the new parts should be here by the weekend. So I'm content to wait.

Plus I'm not all that excited about flying outside lately. The process goes something like this. Start by running my hands under warm water for a few minutes. Then quickly dry my hands off, grab the heli and step out side. After about 4 minutes the fingers start to get numb. Fly another 2 to 4 minutes for an exciting landing. Come inside and do it all over again. The garage is a lot warmer and would be good for some hover practice. However once you've been outside, its really hard to go back to such a confined space.
01-23-2008 07:37 AM
 
 
Gregor99
Elite Veteran
Location: Western Wa

This issue as been solved. First item to be replaced was the connecting links that attach to the blade grips and pitch arms. One of these had more slop than the other. There as an imeadiate improvement and I was able to get the blades to track dead on, even in idle-up. Unfortunately it only lasted for couple batteries then the tracking fell out again. I was able to adjust it back in line but it was never as perfect as it had been after replacing the links. I can't explain this.

Next was the swash plate and the washout assembly. I didn't have time to do these in seperate steps as I wanted to, so I did them both together. The rest of the head was still plastic. The hub is new but the flybar center holder and blade grips are the original stock blades.

After these changes the tracking was dead on for a 3 batteries, which is all the test time I had today. The visible tail vibtration was also reduced which help my tail wagging. Combined with the new tail grips and K&B blades, the tail wagging has for the most part stopped. The tail isn't wagging, but it does tend to wander around now. I didn't have time to perform much tuning so, some adjustments could help this.
01-28-2008 03:08 AM
 
 
Gregor99
Elite Veteran
Location: Western Wa

Just wanted to update this thread. I finally had some time to test out the new setup. I ran 8 batteries in the garage tonight and the tracking held fairly well. With a fresh battery the tracking is slightly off, maybe 2 to 3 blade widths. But it quickly settles into smooth near in-line tracking as the battery wears down. Its also not perfect at the extremes of collective input (positive or negative). This is most likely due the last remaining piece in the head that was not replaced, the flybar assembly. You can see the slop there if you hold the blades them twist them side to side.

However that is minor and is not causing the massive airframe frame vibrations that sent the gyro into fits and kept me grounded. I can live with a little bit of imperfection and long as it doesn't distrupt the 2100t.

I played with all the adjustments for the tail. Its still not tack perfect in a hover but its worlds better than it has ever been. In summary the follow replacement parts corrected the follow issues:


Tracking
========
Swashplate
Washout Assembly
Links to the blade grips


Tail Vibration
===============
Bearing on the tail box
Tail grips
Correcting the tracking issues

In fairness to "food for thought" thread, I'll say that I choose the CNC option but new plastic parts would have worked as well.

Of course what would one my posts be without the obligitory massive pics for Doug? Enjoy.










01-31-2008 06:46 AM
 
 
DougsRC
Elite Veteran
Location: MA

Gregor, I'm glad your tracking has improved, it was bugging the hell out of you. Those pictures are so good and crystal clear I feel like I can reach into the screen and take your heli. They actually look better than real-life!
01-31-2008 11:14 AM
 
 
shizack
Key Veteran
Location: Augusta, GA USA

I've looked at those pics a few times, and I knew something was bugging me...

Are those S75 servos!!!? Man, you like to live dangerously. Just my opinion, take it as you wish, but dump those troublemakers as soon as you can. What to get? ANYTHING else. I, personally, have had nothing but trouble with those things.

I've had 4 un-crashed ones go bad on me for no apparent reason. I've only had a total of 7 of them.

Of course, YMMV.

The more they overthink the plumbing, the easier it is to stop up the drain.
01-31-2008 11:29 AM
HOMEPAGE  
 
 
Gregor99
Elite Veteran
Location: Western Wa

Quote 
I'm glad your tracking has improved, it was bugging the hell out of you. Those pictures are so good and crystal clear I feel like I can reach into the screen and take your heli

Thanks Doug. Yes there was time when it didn't seem like there was a solution. I really didn't want to give up and start replacing parts in-mass. Whenever possible, I prefer to take it slow and learn as much as possible. In the end I think I had a good balance of education to frustration. Sorry if at times, it sounded like I was being impatient.

Thanks for the comments on the pics. I own the results to the good advice I recieved on a photography forum many years ago. You might be surprised that the camera is 2002 era 4mp model. As they say, its all about setup and technique.

Quote 
Are those S75 servos!!!?
Good catch Shiz. I wondered if anyone would comment on those. Yes, those are the stock Eflight servos that have been crashed many many times on by Blade CP before making thier way to the HBK2 bare bones kit. My Spektrum radio came with a set of 3 digital micro servos that I've been holding off on installing. I wanted to get past hovering and what I thought would be many more crashes before putting on the better servos. Only one crash happend and I'm at the point where the servos lack of smoothness is starting to bother me. So the new servos will be going on as soon as the ball links arrive from Horizon. Hopefully this weekend.
02-01-2008 05:23 AM
 
 
4 pages [ <<    <     2      3     ( 4 )    >    >> ]1122 viewsPOST REPLY
Thunder Power RC . Mikado Modellhubschrauber . GrandRC

.
.
e-E-Sky Honey Bee- Lama- Belt CP- E-Smart > Blade Tracking, Again............URGH! - SOLVED!
 PRINT TOPIC Advertisers 

Subscribe to This Topic

Tuesday, December 2 - 6:38 am - Copyright © 2000 - 2008 runryder.com | email | link to rr | runryder needs cookie