RE: Struggling with Single Rotor basics  
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RE: Struggling with Single Rotor basics - 1/13/2008 11:29:03 PM   
soloboss


 

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From: Fort Wayne, IN, USA
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That's not an ugly hover. You're getting your money's worth out of that garage. If you hovered in just one spot, you could convert a closet to fly in. But you have a whole garage (except for the part with the beat up pick up). Like they say, "If you got it, use it".

I've been through a dramatic day today. I put things back to stock. Then I mounted the 9.6 volt CP battery and tried to fly. Ohhh, misery. No matter what direction the heli lifted off, that's the direction that it went. No control made any difference. No control of the heli. Broke another tail rotor. On inspection, "Everything" looked fine. Long story short - it's hard to find a broken rotor head core by looking at it. One clip broke and the other clip was holding it together. Flight dynamics are bizarre at best.
I learned from Ndoren that going to the flight field with a fully built up drive unit saves serious time in the event of a break. I had no idea how correct he was. Getting that little shear pin back into the head is a migraine looking for a head.

BUT with the new head in place I took the stock weight F40 back to the patio for a test. I'm set for slower response to work with the stock weight heli and the wind is out of the west at 10 mph. The house is west of the patio, so the wind blows over the house and makes a gusty down draft and swirl. But it flew rather well. In fact I got a decent hover despite the turbulence. One time I nearly lost it and I made a very low sweeping pass sideways across the patio and one skid tripped on a chunk of dog poop (my cocker spaniel hates wet grass) and that ended that session. But after cleaning up the patio and trying again, I'm in the breeze and flying this little weirdo. While the super skids are off, I may install lightning holes (drill lightening holes) and see if I can loose some of that 30 grams. I don't want to loose strength, but I want less mass.

So I'm back on the trail to happy flying. I'm sure that a flying buddy would be worth his weight in gold (perhaps at last year's price) for tips and reassurance. Out here alone it's just me 'n the copter. And we don't always play together well.
But this time I didn't hit my antenna.

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Soloboss
If everyone''s thinking alike, then somebody isn''t thinking . . . G. Patton

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       Post #: 151

RE: Struggling with Single Rotor basics - 1/13/2008 11:54:30 PM   
soloboss


 

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From: Fort Wayne, IN, USA
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I had my antenna wrapped around the port side tail stay. As Shufflez noted, I was making an electro magnet out of the antenna. So I re-routed the antenna wire to the aft skid assembly and then wound the wire in a figure 8 pattern using the two loops in the inside of the radius of the rear legs. And I left about 10" of wire hanging loose. The glitching quit.
Keep the antenna wire away from the servos, the motor and the battery. Maybe the antenna location will help.

Oh, yes I did have a problem with glitching just before one of the servos quit. When I put in the new JR SM15 servo everything was stable again. You may have a servo that is getting stiff and is about to quit. I found my SM15 on sale at half off the $30 retail price. Two for $30 isn't bad - nice servo.
Soloboss

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Soloboss
If everyone''s thinking alike, then somebody isn''t thinking . . . G. Patton

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       Post #: 152

RE: Struggling with Single Rotor basics - 1/14/2008 1:38:09 AM   
soloboss


 

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Update - with the flybar weights removed, the paddles flat and the swash set to the long studs I'm at fast response and stock weight. Well, almost stock. I'm using Blade CP 8 cell 9.6 v packs and I left the two wing things from the Super Skids installed on the boom. The horizontal wing is a good rotor blade deflector and it keeps the rotors from whacking the boom. The vertical stabilizes the tail stick. And the two wing things work well to balance the heavier power packs.

In this configuration and no canopy I actually flew the better part of a pack in one hover - in the living room. I had one end of the room between a Lazyboy, a kid's project table, the dog's water bottle, TV trays etc. I guess I had an area six feet in diameter and that was plenty of room. I have an idea why that worked well. All of the stuff mentioned above is shaped differently. There is no established pattern of air circulation. There was plenty of moving air, but no pattern to the air that would let the moving air continue to accelerate. So does that make the living room better than the garage for practice? I dunno, but it sure is warmer. But the question is, is the warmth worth the inevitable collision with the ceiling fan?

Soloboss

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Soloboss
If everyone''s thinking alike, then somebody isn''t thinking . . . G. Patton

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       Post #: 153

RE: Struggling with Single Rotor basics - 1/14/2008 3:41:48 AM   
stump3r



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Solo I find that if I run the stock 8.6 the added weight just makes her a real pig to fly granted I'm still running super skids. Switch to a lipo and things are alot easier. I'm even running my stock Eflites and getting 5 to 6 minutes of good flight now. You should get Mrs. Solo to shoot some video of you flying the F40. I'll bet your actually flying it better than I can and just won't admit to it!

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Life is tough. It''s even tougher when your stupid! - John Wayne
CX2, FourKing FP, CX450SEV2, DX7

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       Post #: 154

RE: Struggling with Single Rotor basics - 1/14/2008 11:07:14 AM   
xyster101


 

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+1 to Mrs. Solo shooting video.
I found the super skids and the 1350mamp pack are great together, close to stock weight. The CX LiPo was too light and the thing is squirrelly. The stock pack and skids would be a beast. The stock weight seems to be a good balance. Glad to see you back on track. I left my heli at work this weekend and all weekend there was no wind go figure.

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       Post #: 155

RE: Struggling with Single Rotor basics - 1/14/2008 6:25:33 PM   
scale_edge



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congratz stumper for earning your fp wings - solo, keep up the good work, remember the flybar is the opposite of the cx, the more free movement it has makes for more and violent movement - there is a stabilizer bar for the micron's flybar that limits its drastic movements and makes it more flyable, cause if you think the fp #4 size is twitchy, you should try the tiniest (and most expensive) fp in the world

edge

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through the glass:Blade 400 A-Star 3-Blade, Gaui EB1003B 3-Blade - hotel room flyers:Walkera 5-5B, Walkera 4-3

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       Post #: 156

RE: Struggling with Single Rotor basics - 1/14/2008 8:26:46 PM   
stump3r



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Thanks Edge. I'm still in a state of shock that I can keep it in the air.


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Life is tough. It''s even tougher when your stupid! - John Wayne
CX2, FourKing FP, CX450SEV2, DX7

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       Post #: 157

RE: Struggling with Single Rotor basics - 1/15/2008 5:52:34 AM   
stump3r



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Solo, when your servo was doing it's death glitch on you, did it cause the main motor to cut out? Curious. I'm wondering if that's not the issue with my bird. Hovered and couple of bats in the living room tonight as well as some bench tests. The only symptom I can get it to produce is an engine cut out. It's a split second but sure makes me wonder if it's 4in1 or servo....or both. The hell with it....I'll fly it till it dies then I'll know for sure.

_____________________________

Life is tough. It''s even tougher when your stupid! - John Wayne
CX2, FourKing FP, CX450SEV2, DX7

(in reply to stump3r)
       Post #: 158

RE: Struggling with Single Rotor basics - 1/15/2008 11:12:40 AM   
xyster101


 

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Could be a radio issue? My CX had a twitch servo that required replacing. It worked ok, just would have the jitters when no input was sent to it. My #4 would do weird jittery things too with the tail and servos until I moved the antenna away from the stock wrap around. I have super skids and wrapped it around the skid arms maybe 3 times lightly so it is not overlapping then through the plastic tub and back along the tube's outside with fuel line pieces to hold it. It got rid of most jitters. Also make sure to extend the tx antenna at least half way for bench tests.

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RE: Struggling with Single Rotor basics - 1/15/2008 2:59:03 PM   
stump3r



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I'm pretty sure now that I have heat issues in the 4 in 1. I'm thinking time to punch some holes in the case to see what comes of that! I can get it to glitch like clockwork now. Approximately 2 and a half minutes into a flight with a cold bird the first cut out occurs. Then progressively gets worse the longer I fly it. Let her sit, cool down and you guessed it 2 and a half minutes into the new bat....glitch starts again. I have some tricks to try, worst case I see an upgrade to electrics coming

_____________________________

Life is tough. It''s even tougher when your stupid! - John Wayne
CX2, FourKing FP, CX450SEV2, DX7

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       Post #: 160

RE: Struggling with Single Rotor basics - 1/15/2008 10:55:48 PM   
soloboss


 

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My tail went glitchy and the main motor wouldn't tolerate me being any where near the heli. If I passed my hand over the heli the servos rattled and the motors would glitch. The worse the servo got, the worse the thing flew. Spastic height, spazy tail, erratic control from the servos. Then it would take off sort of sideways and I could catch it, but couldn't hold it. It was like I was unlearning everything that I am able to do know as I slowly degraded to the way I 'flew' a month ago. New servo - new helicopter.

That probably has nothing to do with your problem, but I was convinced that my 4 in1 was going because ALL of the controls were nuts. Then the servo quit and you know the rest of the story.

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Soloboss
If everyone''s thinking alike, then somebody isn''t thinking . . . G. Patton

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RE: Struggling with Single Rotor basics - 1/18/2008 5:20:21 PM   
xyster101


 

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Ahh our thread is moving away. Anyway, I finally got my #4 working again. Moving this week, no time. Today the gym at work was finally empty and I actually did more then hover. This thing is way too twitchy. The tail was constantly just reving up and down so the tail is constantly moving on me. This makes flight in any direction very hard. I did not realize how fast these will go forward, the gym got small very fast. I put a 11.1V in it to, it was even more twitchy! I ended up crashing hard and broke the head pretty good. sigh. Maybe a B400 is the way to go, or maybe i will never be able to fly forward.

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