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Skookum Robotics Skookum Robotics SK-360 SK-540 & SK-720 Digital Flybar |
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11-26-2013, 08:12 PM | #1 (permalink) |
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Join Date: Mar 2013
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How "perfect" does SK need to be?
I'm just finishing my setup on a Gaui X5. All gyro orientations appear to be working, swash movement correct. Just a couple quick double checks before I spool up tomorrow. On the leveling of my swash, mid is golden, however,low and high stick I have readings of no more than half degree difference... I.e 10.8 and 11.2 &-10.8 and -11.2. I have been unable to dial it in to a perfect 11 +or-. Will this be good enough for SK540? Last one, When I set up the tail, it was perfect 90 linkages and arms, on power up, the tail automatically goes left, if I'm not mistaken (leading edge toward boom). I'm hoping this is just an automatic compensation for the rotor. Please verify! Other than that, I feel very confident about the maiden. My apologies for the long post. Thanks much everyone.
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11-26-2013, 08:40 PM | #2 (permalink) |
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Join Date: Jul 2010
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Yes! The tail compensates. And the half degree, personally I would add it up in the Sk servo endpoints until it is dead on myself. So if the servo travel % at bottom is 100 and it needs 104 on one servo to get the swash dead level. Do it.
I feel there isn't anything more frustrating than doing 3d and having your angles come out slightly off when it isn't your piloting causing it. Half a degree may not sound like much, but it can add up to quite a few inches at the end of a throw in the disc being off angle.
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11-26-2013, 11:03 PM | #3 (permalink) |
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I have everything set up perfect when the SK is plugged in, but as soon as it disconnects, it throws my settings all off? Any idea what's going on?
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11-26-2013, 11:20 PM | #4 (permalink) |
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Join Date: Mar 2013
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Just confirming again, I was able to get everything perfect. All zero at mid +&- 11 on collective all is good, until I unplug the cable from the unit. The my pitch is off by a degree. What is going on? Every time I made a change I'd send the data to the unit and check everything, then move to the next adjustment. I don't see why as soon as I plug it in it goes back to perfect and then I unplug, it goes wonky...
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11-27-2013, 01:16 AM | #5 (permalink) |
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Are trying to check your pitch while its not pluged into thé software ?if thats what your trying to do its not in set up mode you will get a true reading ,if everything looks good while your pluged in then it sounds like your all good.Just make sure your swash movements and tail are all going thé right way ,same with when you tilt your swash and move thé tail
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11-27-2013, 05:58 AM | #6 (permalink) | |
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Join Date: May 2013
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Quote:
+1 Just like the pre-comp you saw added to the tail, there are other calculations that get applied to the swash as soon as you unplug it. If its good in setup mode, do your 200% Hiller trim flight, and go to town! Chad
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Gaui X7 JR 11x | Revolectrix | Protek & RJX Servos | Skookum SK720BE | Scorpion HK4530-450 LE| Rail Blades www.barotors.org |
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11-27-2013, 08:30 AM | #7 (permalink) | |
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Location: Smyrna, GA
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Tony Synergy 516, Gaui R-5 Speed (RIP), Cypher Vtol Jet (RIP), Spirit FBL, Hobbywing and Scorpion Tribunus ESC, Xnova motors. The girl in my DX9 tells them all what to do |
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11-27-2013, 09:33 AM | #8 (permalink) |
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Okay, so the difference between measuring pitch plugged in I'll have mid zero, +/-11 unplugged I'll get like 11.5 and 10.5. So your saying this is no worries due to SK's calculations? Everything looks as perfect as it can while plugged. Unplug and settings get weird. But if that is supposed to happen than I should be set! Thank you all for the quick replies! I just don't want a new heli to go up roll right and boom! Or something dumb like that.
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11-27-2013, 11:27 AM | #9 (permalink) |
Join Date: Mar 2007
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=] rest assured what you dialled in during setup mode is what you will see in flight mode, but only when the gyro is active at full headspeeds. what you are seeing is normal.
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11-27-2013, 11:46 AM | #10 (permalink) |
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Thank you all for the replies! I was trying to wrap my head around that last night. Couldn't understand why my pitch was off when the unit wasn't plugged into the PC. You've all set my mind at ease. I have hiller decay set to 200 and I'm ready for a test hover! I may need an extra change of underwear... Thanks again everyone.
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11-27-2013, 11:53 AM | #11 (permalink) |
Join Date: Mar 2007
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=] you can bank switch hiller decays if the weather isn't suited, ie, just fly the mother!
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11-27-2013, 12:40 PM | #12 (permalink) |
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LOL Best line in the thread! Good advice from a good source too! Chad
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Gaui X7 JR 11x | Revolectrix | Protek & RJX Servos | Skookum SK720BE | Scorpion HK4530-450 LE| Rail Blades www.barotors.org |
11-27-2013, 01:05 PM | #13 (permalink) | |
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Join Date: May 2013
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Dont be too nervous. I'm sure there are some crazy stories out there, but as long as you started from scratch, and used the wizards, the worst thing that's gonna happen is ita gonna fly. I've had helis tip over, and tear themselves apart midflight doing their own 3d, but never with a Skookum. I follow the wizards, and then they fly. They always lift off straight up too! Its crazy LOL. There isn't a single piece of equipment I've ever used on a heli that increased my confidence in my machine as much as Skookum. Chad
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Gaui X7 JR 11x | Revolectrix | Protek & RJX Servos | Skookum SK720BE | Scorpion HK4530-450 LE| Rail Blades www.barotors.org |
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11-27-2013, 02:10 PM | #14 (permalink) | |
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How "perfect" does SK need to be?
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Georgi that's who. The guys a legend in every way. Above and beyond compare.
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Oxy 3 SK540 Minijazz 20 / WARP 360 SK540 Koby 55 / Goblin 500 SK540 jive 100 / 6HV ultimate Helijive120 SK540 / 7HV SK540 Kosmik200 / Futaba18mz / Skookum support rep Last edited by heathy; 11-27-2013 at 06:08 PM.. |
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11-27-2013, 03:40 PM | #15 (permalink) |
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That is all very good news. I followed the wizards, Read through them all several times, checked and rechecked all my settings and I'll do it again in about 15 min before first spool. You can be sure I'll report back, hopefully! With a nice solid hover.
Turns out I didn't submit everything above! I have a maiden, I managed a fairly good hover but the whole thing has some vibes. Kinda shaking all over. Everything is 100% solid, locktitted, my gains are all at the recommended starting point. Any ideas now? Does SK540 clear have vibe log without the 25$ upgrade? |
11-27-2013, 04:03 PM | #16 (permalink) | |
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Join Date: May 2013
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Shakey could be alot of things, blade tracking, dampers, ball links, headspeed, cyclic gain etc... Lots of things. My models are usually a little shakey for the first 5 flights just breaking in the dampers, so if it's just a little shimmy, and it goes away in flight, I let it go till the plastic parts break in. Any chance of a video? Unfortunately the only way you can get the ability to view the logs yourself is to plunk down the cash for a 720. IMHO that alone makes them worth the extra $$$, but they come with a bunch of other goodies too. The logs provided by the 540's can be viewed by Skookum only, but your issue doesn't sound like anything that we'll need logs for. Pretty normal stuff for a maiden if it wasn't a violent shake.
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Gaui X7 JR 11x | Revolectrix | Protek & RJX Servos | Skookum SK720BE | Scorpion HK4530-450 LE| Rail Blades www.barotors.org |
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11-27-2013, 04:56 PM | #17 (permalink) | |
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Location: Smyrna, GA
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Quote:
When you say "shaking all over" do you mean as in the skids and everything are vibrating like you would get with something out of balance or bad tracking, or are we talking about a rhythmic hula type dance the heli is doing in hover? Were you running low head speed?
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Tony Synergy 516, Gaui R-5 Speed (RIP), Cypher Vtol Jet (RIP), Spirit FBL, Hobbywing and Scorpion Tribunus ESC, Xnova motors. The girl in my DX9 tells them all what to do |
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11-27-2013, 06:52 PM | #18 (permalink) |
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I only have my phone for posting data. On my swash travels, all are between 120 and 130% gains hiller decay at 200%, the rest are at 50% except for the two at 18/16. The shake was noticeable and a lil more than I would have liked. It seemed like the first hover was just a tail wag but by the 3rd batt it was more of a total heli vibe. Bit of a tail wag horizontal, skids shaking, everything... Could this be cause by slightly too loose of pinion and main gear mesh? The heli seems very solid and smooth and sounded Amazing! I only did 3 batts for 3 min each, everything is new so just breaking in.
My thoughts are adjust the mesh a lil bit and try again for a few batteries. Maybe just needs things broken in. I had a lil bit of drifting but I think I dialed that out with just a couple lil linkage turns. Everyone's advise has been much appreciated and made for a confident maiden so thank you all! And Happy Thanksgiving for all those that celebrate it. |
11-27-2013, 06:54 PM | #19 (permalink) |
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And forgot to mention that the blade tracking was solid, and I balanced the blades.
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11-27-2013, 07:08 PM | #20 (permalink) |
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Join Date: Sep 2008
Location: Smyrna, GA
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Swashplate tab mix values? Pinion isn't going to cause the heli to wobble. Really tight ball links could possibly cause that behavior. So could having the main blades too tight in the grips.
You need to bring the Hiller Decay back down to a normal value form the 200% once you have finished the drift adjustment.
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Tony Synergy 516, Gaui R-5 Speed (RIP), Cypher Vtol Jet (RIP), Spirit FBL, Hobbywing and Scorpion Tribunus ESC, Xnova motors. The girl in my DX9 tells them all what to do |
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