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Mikado Logo Helicopters Mikado Logo Helicopters Discussion |
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06-04-2011, 02:20 AM | #41 (permalink) | |
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These are carbon servo arms, I've ordered them with my kit. |
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06-04-2011, 08:56 AM | #42 (permalink) |
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spektrex, Fantastic build thread and Excellent photography
Flip those main blade grips as GimpyGolden says |
06-04-2011, 09:46 AM | #43 (permalink) | |
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A photo would be nice to make it 100% clear Grips have been flipped, again, thanks a lot!! See here: |
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06-04-2011, 03:54 PM | #44 (permalink) |
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An update.
I didn't do that much today but I did secure the pinion, the motor and counter bearing. Put some red locktite to it, gear mesh tightness just a fraction of a mm, just enough to allow some plastic from a plastic Mikado bag to run through the pinion and main gear. If I push the main gear I can just about feel a tiny bit of space beween the gear and the pinion. Note that I had to dremel a few mm of the bolts, good thing I checked this beforehand because they just hit the internal windings by a fraction. That would have caused a malfunction for sure in the nearby future! If you install a counter bearing please check the length of the mounting bolts!! The main gear and pinion / counter bearing (I did notice the red loctite and cleaned it up on time ) Mounting anti-static kit, this is the tail section, wire running from belt tensioner to tail-boom: The antistatic wire continues at other side of boom. I drilled a tiny .2mm hole and put a small self-tapping screw in between the belt, that's why I choose to put it at the bottom so even if a tiny bit of the screw comes through the boom it can never interfere with the belt (that's no risk as it is but it cant be any safer than this): Last part is attached to the counter bearing holder: Checking electrical condictivity: Used a multi-meter to check the wiring, <1 Ohm, good enough I'd say: That's it for now. On to the V-Bar unit (BTW: that strange bunch of lipo's and NiMH packs in front of the frame are just to balance the heli while building, I got tired of it flipping over all of the time and I don't have a 10S Lipo yet, those are to be delivered soon - I hope). Last edited by spektrex; 06-04-2011 at 05:06 PM.. |
06-04-2011, 05:24 PM | #45 (permalink) |
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It's 10mm from the top of the main shaft collar. I'll take a pic of how I set mine up later today (because I have to set up a 600SE anyway).
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06-16-2011, 03:08 AM | #46 (permalink) |
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It's been a while. The ESC (Jive120), Lipo's (4000mAh 10s) and chargers (iCharger 1010b+) are delivered in perfect order. I am now strugling with vBar settings.
1) This confuses me.... I am setting up main blades. Zero degrees putch at mid-stick, full neg. pitch = 13 degrees, full pos. pitch = 13 degrees but at full pitch (both neg. and pos.) I can't use cyclic in a normal fashion. Servo's don't keep up, the run at their limit. If I give full cyclic in any direction there is no problem at midstick, but once I give both cyclic and full pitch I can see the swashplate move up or down, up to a point 1 servo is at it's limit. Swash then tilts in that direction because the servo is at its maximum throw. All vBar settings conform manual (8 degrees throw as reference for internal workings, 13 degrees pitch, all set and done like it should). That's one thing. 2) Other thing is the tail. The vBAR setup mention that there should be about 2 degrees throw in torque direction at the tail setup screen. I assume that horns must be 90 degrees (they are), and with that the tail-blades should give a 2 degrees pitch against torque. Is that correct? Or have you all set up tail at 0 degrees pitch / both horns at 90 degrees? The vBAR setup screen is quite clear on this, but I find this very confusing. Can anyone please help me with these questions? I have googled but can't find an answer. |
06-16-2011, 04:27 PM | #47 (permalink) |
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Fantastic thread spektrex.
Excellent build and even better pictures. Well done my friend.
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06-17-2011, 01:01 AM | #48 (permalink) | |
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[ame]http://www.youtube.com/watch?v=n-3EJSzucDg[/ame] That's one thing. Hope if someone can help me with this also......... |
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06-17-2011, 03:18 AM | #49 (permalink) |
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I'm not positive, but I believe that's the cyclic ring function of the VStabi software. It prevents binding at extreme deflection when you're feeding in full collective and cyclic controls. You can disable the cyclic ring function if you desire.
On my SE, when the tail rotor control lever is 90 degrees to the tail boom, the tail rotor blades have those few degrees of anti-torque pitch set perfectly. When set up with the control lever at 90, you also have identical travel on either side of the tail rotor shaft. |
06-17-2011, 12:48 PM | #50 (permalink) |
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I am also buildin a 600 SE
Mine does not exhibit the behavior you describe. Mine seems just normal |
06-17-2011, 06:04 PM | #51 (permalink) | ||
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I have posted the same question at the forums @ http://www.vstabi.info/forum/read.php?26,63202
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Regards, Robert. |
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06-18-2011, 08:56 AM | #52 (permalink) |
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I have finished wiring on the heli, and I've made some pictures, hope you enjoy them. If there are things that might be done better or different, please let me know. I'm new to building something this big.
Soldering ESC: I've made some BEC cables myself from High Current servo wire Trimming shrinkwrap Wiring from VBAR to BEC, the antistatic wire runs through some fuel tube I had laying around somewhere. Servo wiring runs nicely along the inside of the frame ESC / motor wiring took some time to figure out how to position the wires and fixing the ESC as well. I have placed some dampening rubber (don't know how you call that: it makes it difficult for things to move, and it dampens as well so vibrations are eliminated). Wiring was a puzzle. I didn't want to have wires running along servo-arms. This seemed to be the most logical place. The antistatic wire runs through some fuel tube. Receiver goes next to VBAR. I have glued a piece of velcro next to the VBAR (on the receiver as well) - air can run underneath and it takes care of vibrations. The VBAR is glued with the supported doubled-sided stuff that came with it. That should take care of all residu vibrations. Wiring overview Now came the challenge, I have tought a lot how I would deal with the antenna wires that have to be in a 90 degree angle. It should be relatively free of any conductive parts as well, I didn't want to just glue it to the frame, I couldn't imagine that would work well. So I came up with this; a servo horn, a spare bracket and some shrink wrap: That's it for now... I am going to check the entire heli and see if all bolts and nuts are tightened. I bought a digital pitch gauge so I am going to re-do the VBAR setup and make sure all throws and pitch settings are spot on. I hope to maiden the heli soon now. The weather is really bad over here, lots of rain an hard gusty winds. I seems to approve next monday... If you have any recommendations while watching the pictures please share your thoughts. I appreciate all your input a lot! This whole setup is as it is thanks mainly to your input. Also I got some nice tips and hints along the way, for which I am very greatfull. I hope I did not make mistakes and I am open for suggestions to further improve things. Maiden as soon as possible |
06-18-2011, 09:34 AM | #53 (permalink) |
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Did you use epoxy to permanently attach the tail bearings from the case?
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06-18-2011, 10:11 AM | #54 (permalink) |
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esc/bec wires look awfully small
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06-18-2011, 11:32 AM | #55 (permalink) |
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Do they? (look small?) It is the same wiring as the high current servo's. The red / white / black is esc (the brown / red / black is receiver) - I'd say they don't come any thicker but I'll look into it.
As for the epoxy, no. I did not do that. I had to use an awfull lot of force to get the bearings in. But you are right, manual states epoxy must be used, I saw a build vid stating epoxy was not needed as they are rocksolid as is while pressed in. I think I will dissasemble and use epoxy! Thanks, better safe than sorry. Would CA not be better I wonder, the manual also stated epoxy the tail rod, but I have tried that and they came lose when aplying much force, when I used CA all that broke but not the CA'd thread / carbon connection (i broke my first rod so I experimented on that). - for tail, I used CA, not epoxy. My finding is that this is safer and stronger. I will epoxy the tail bearing however, as per manual. |
06-18-2011, 12:31 PM | #56 (permalink) |
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CA=Bad, too brittle
Use a product like JB Weld, metal epoxy. Reg 30min epoxy is good for the bearings.
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06-19-2011, 12:20 AM | #57 (permalink) |
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Spektrex,
First of all I love your images. They are probably the best I've seen on any heli/RC forum. What camera, lens, settings are you using? Lighting looks like normal incandescent in-home lights. Are you using an Expo Disc for exposure or just Auto White Balance? I'm a professional photographer that was schooled in film using Nikons & Hasselblads among a few others for over 20 years. Bought a 5DmkII & 24-105 f4.0 last fall (I resisted digital for a long time) but I'm still quite "burned out" of the trade (and need a faster Mac with more storage) so I've not used it much. To get back on topic, I'd highly suggest that you don't mount your receiver using velcro unless you are going to put a strap over it. Much better to use a hobby/RC double-sided tape. I'm also not sure what that clear tubing is enclosing but it might look better without it. Just my 2 cents
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06-19-2011, 12:59 AM | #58 (permalink) | |
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06-19-2011, 03:38 AM | #59 (permalink) |
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Hi Spectrex!
One comment about the JIVE wiring: I was reading in that the JIVE had problems in the past with the motor wires running along the long side of teh Jive, which is exactly what you are using on your installation. It's a general rule anyway to keep the motor wires short, because they add to the impedance of the motor and with the high freqeuncy and high current flowing through them, they act like an antenna too. I have the JIVE in the same position as you, but I shortened the motor wires a bit and am going directly sideways and in an arch down, into the frame from the side and to the motor wires. It's clean and stay well away from the ESC. Cheers, Surf |
06-20-2011, 10:28 AM | #60 (permalink) | |
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