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Skookum Robotics Skookum Robotics SK-360 SK-540 & SK-720 Digital Flybar |
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04-19-2012, 10:14 PM | #21 (permalink) |
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Join Date: Oct 2011
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Just curious Does the trim affect inverted self level ? Just fitted sk720 to my 450 and I'll set up the normal self level tonight. Currently when I switch self level on it drifts left and back.
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04-19-2012, 11:27 PM | #22 (permalink) |
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Hhmm...
Good question. I'm not able to fly stable inverted yet so I haven't given it a thought. But I think you should NOT use inverted SL, just the normal one. I think the trim you do to get a stable normal-SL-hover will counteract in inverted mode => make it worse!! Here's a how-to to find out: - have SL+Inverted active in your SL-bank but haven't done SL-trim yet - bring your heli in normal-hover with no SL active - switch to selflevel - the heli drifts in one direction - now you can hold your right Tx stick (mode 2 Tx) in one direction to correct that drift (thats is essentially what the trim does). lets for instance that your heli drifts to the front-left, so you have to hold your stick to the lower-right. - switch back to normal-mode (no SL) - now bring you heli in inverted-hover - switch to selflevel - the heli drifts in one direction - now you can counteract this drift with a Tx-stick-movement to bring the heli back into hover. if you have to move your stick to the same direction as for normal-hover (lower-right in our example) it is safe to use this how-to trim-method with SL+inverted active. otherwise you must use normal-SL (no invertion) let me know! I'm curious Soko
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The future of setup... now! Soko Heli Toolbox app for a next generation setup experience. ONE tool for ALL setups of ALL sizes and ALL brands of helis www.soko-heli-tools.com Last edited by soko; 04-20-2012 at 12:56 AM.. |
04-20-2012, 02:46 PM | #23 (permalink) |
Join Date: Mar 2007
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=] feeling a bit lost here as to what is being discussed?
a trimmed SL upright hovering heli will equally hover inverted at 180 degrees to that using inverted SL, no differences.....
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04-22-2012, 04:09 PM | #24 (permalink) |
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Geori!
That's exactly what I/we needed to know. In conclusion: If you SL trim your heli according this how-to in normal hover and than use the inverted-SL function everythings works OK. The heli doesn't start to drift realy bad in one direction (as if the trims will add to the drift instead of counteract to it). Great Soko
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The future of setup... now! Soko Heli Toolbox app for a next generation setup experience. ONE tool for ALL setups of ALL sizes and ALL brands of helis www.soko-heli-tools.com |
10-20-2012, 12:24 PM | #25 (permalink) | |
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Quote:
thanks, G https://www.helifreak.com/showthread...=451957&page=5 |
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10-20-2012, 01:44 PM | #26 (permalink) |
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Level to the heli means level to the main shaft.
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Futaba 14SG, Synergy E5, Furion 6, Beam E4(v1) FBL, CGY750, Skookum |
10-20-2012, 01:48 PM | #27 (permalink) |
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OK. Thanks for the fast reply...
G Sent from my C64 using Tapatalk 2 Last edited by neavissa; 10-24-2012 at 10:35 PM.. |
10-20-2012, 08:24 PM | #28 (permalink) |
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Join Date: Jul 2007
Location: Melb, Oz
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If you have a plastic frame 500 Protos and you want to mount there you need to make up a wedge to go under the Skookum. I used 2 peices of plaster scraper from the hardware store, cost about $5 and 1/2 hour. You just need to grab a couple of ones with different angles and work out where to cut them. Then just use thin double sided tape to keep the layers together. I still have this setup on my night flyer Protos.
If you have the carbon frame there is an upgrade lower tray available that has a 90 degree setup ready to go. //Dennis.
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soXos: Strike 8.1 - Strike 7.1 Light - Strike 6.1 : Goosky: RS7 - RS4 - S2 - S1 soXos DB7 nightflyer : Jeti DS-16 & DS-12 I am www.soxosaustralia.com.au | soXos helis | 1st-RC Products | EGODRIFT motors | Goosky helis | Spinblades |
10-20-2012, 09:38 PM | #29 (permalink) |
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Hi,
I'm not quite sure (please Georgi or others correct me!) but I don't think the SK720 needs to be level with the main shaft. All it needs is a calibration with the main-shaft in level. So you tell the SK720 that this "out-of-level" position should be its new 0,0,0. After that the heli SL should work great. Soko
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The future of setup... now! Soko Heli Toolbox app for a next generation setup experience. ONE tool for ALL setups of ALL sizes and ALL brands of helis www.soko-heli-tools.com |
10-20-2012, 10:04 PM | #30 (permalink) | |
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Quote:
G Sent from my C64 using Tapatalk 2 |
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10-20-2012, 10:08 PM | #31 (permalink) | |
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Quote:
Thanks, G Sent from my C64 using Tapatalk 2 |
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10-20-2012, 10:39 PM | #32 (permalink) | |
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Quote:
If you level the SK off of that axis, the SK will think that the helicopter is not level when hovering.
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Futaba 14SG, Synergy E5, Furion 6, Beam E4(v1) FBL, CGY750, Skookum |
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10-20-2012, 11:14 PM | #33 (permalink) |
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I mean, think about it. They sell the SK calibrated or level or whatever you wanna call it. Most spots the SK is being mounted on, are in a 90° angle to the main shaft, thus when hovering, the heli is in a somewhat level position. Right?! Why shouldn't you be able to tell the sk720 hey, this is the new level?! Isn't that the reason why I have to wait a few seconds after plugging the battery into my nano cpx?! So it can initialize AND know what level is... at least that's what I thought this whole time...ha ha.
G Sent from my C64 using Tapatalk 2 |
10-20-2012, 11:36 PM | #34 (permalink) | |
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Quote:
Like my Beam E4, it has a forward lean. In fact, I remember instructions on a particular FBL unit that said, if the heli is not still during the initialization process due to wind, lay the helicopter on its side for the initialization.
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10-20-2012, 11:43 PM | #35 (permalink) | |
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Yeah,
I think during the init of all helis (mcpx as well) its just about not moving it. it has nothing to do with "what is level". Quote:
Then everything should be fine Soko
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The future of setup... now! Soko Heli Toolbox app for a next generation setup experience. ONE tool for ALL setups of ALL sizes and ALL brands of helis www.soko-heli-tools.com |
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10-21-2012, 12:58 AM | #36 (permalink) | |
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Quote:
Thanks, G |
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10-21-2012, 01:04 AM | #37 (permalink) | |
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Quote:
thanks, G |
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10-21-2012, 03:58 AM | #38 (permalink) | |
Join Date: Mar 2007
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Quote:
the unit must be mounted perpendicular to the mast, and re-calibrated off the model on a level surface, we must keep the main gyro's and accelerometers in sync with each other, no exceptions here!
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10-21-2012, 02:30 PM | #39 (permalink) |
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Thanks Georgi
Everybody: forget what Ive said its "wrong" when it comes to the whole SK720 setup. As georgi said: the level of the main sensors must be "the same" (at least just fractions of degree) level as the accelerometers. at SL recal you just acc-levels my theory wont work in practice. In other words: the SL would work but the would fly like crap, or even not at all, in normal mode. Soko PS: yeah sorry bout that: english isnt my first language. im still not getting how you english guys differentiate between relative angle/level and absolute/spirit angle/level
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The future of setup... now! Soko Heli Toolbox app for a next generation setup experience. ONE tool for ALL setups of ALL sizes and ALL brands of helis www.soko-heli-tools.com |
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