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RE: Art-Tech Shark 450
[quote]ORIGINAL: one thumb Hej, what Frequency do you use in Denmark? Tak, one Thumb [/quote] I use 2.4 GHz. If you don't I think it's 35 MHz, perhaps 72 MHz - not 100% sure as I have never used it.
Posted on: 7/14/2009 3:14 PM by Author "holsen"
in the forum "RC Helicopter Beginners Forum"
http://www.rcuniverse.com/forum/fb.asp?m=8932885
RE: Art-Tech Shark 450
No, I bought from Hobbyfly, but have had quite a few quality issues with mine, and have waited a long time on needed spare parts. Luckily T-Rex parts fits for the most parts, but not always. All electronics are replaced by better parts on mine now. The newest "grey-metal" model of the Shark might be better than mine (blue-metal).
Posted on: 7/10/2009 6:56 AM by Author "holsen"
in the forum "RC Helicopter Beginners Forum"
http://www.rcuniverse.com/forum/fb.asp?m=8921038
RE: Art-Tech Shark 450
I promised to report some part numbers for Align spare parts that work on the Shark 450, once I had tried them out. Point in using Align spare parts being that they are often readily available. Here goes a few: HS1184T, FLYBAR ROD 220mm HS1219-84, NEW MAIN GEAR HZ030T, TAIL BOOM FOR 450XL - SE - V2 (Not carbon fiber) HS1016T, TAIL BOOM BRACE (Shorter and thinner than stock Art-Tech, but works fine. Glue the ends to the sticks when mounting for solid grip without vibration) HS1280T, MAIN SHAFT (Note orientation when installing) HS1271T, TAIL LINK ROD HS1218-84 MAIN GEAR (incl. autorotation/lower gear and one way bearing needs one way bearing shaft HZ026T to be used - gear mesh to tail pulley is not as tight as I would like, but have worked until now) HZ026T, ONE WAY BEARING SHAFT (for use with Align autorotation/lower gear) HS1028T, BEARING (685ZZ) (Main bearings for main shaft) And for the flanged 3x8X3 bearings for the tail rotor shaft I found a couple of sources (as I see it, Art-Tech does not provide these seperately). Note that these have not been installed yet, but fits my measurements. http://www.rc-bearings.com/catalog/product_info.php?products_id=426 (F693ZZ Flanged) http://www.helidirect.com/abec3-flange-bearings-3x8x3f-mf83zz-p-1202.hdx (MF83ZZ) Hope it can save some time for others :)
Posted on: 6/27/2009 4:51 AM by Author "holsen"
in the forum "RC Helicopter Beginners Forum"
http://www.rcuniverse.com/forum/fb.asp?m=8882977
RE: Art-Tech Shark 450
Hi there I don't really know how many members we are in the national rc union. I have just started this summer, and can see I have many hours of both joy and frustration ahead of me now :) I live in the capital, Copenhagen, and am about to start in a small klub 30 mins drive from here. There are a couple of shops nearby, but often they are missing the parts I need, so most have been mail orders of Align parts from another Danish shop that usually stock everything Align. I have been really annoyed with the missing Art-Tech parts that are not Align compatible, so I'm slowly changing it to be more and more Align compatible so I always can get parts quickly. I'm also building another T-Rex 450 V1 clone now to practise with - that's 100% Align compatible and will be nice I think. But that's another story. Thanks for the hi across the big ocean.
Posted on: 6/19/2009 12:04 PM by Author "holsen"
in the forum "RC Helicopter Beginners Forum"
http://www.rcuniverse.com/forum/fb.asp?m=8864743
RE: Art-Tech Shark 450
I'm replacing my stock servos with HXT900s from hobbycity and am having trouble getting the servo arm balls to fit nicely without rubbing against the servo gear case on big throws. On a T-Rex the servo mounting holes in the frame are positioned so the the servo arm is pointing away from the center of the servo case (where they are normally a bit high around the upper servo gears), so the ball can move without hitting the servo case, even when the ball is placed on the inside of the arm. This isn't the case on the Shark, where the servo arms have to point towards the center of the servo case, and with ball mounted on the inside of the servo arm (for a straight vertical shot to the swash link), the ball will colide with the servo case on big throws - the servo arm will normally bend as it forces it's way past the gear housing, but it doesn't look good. The stock servo had the same problem, although to a little less extend. To get the servo arms and balls to not touch the servo cases at all, I have placed the balls on the outside of the servo arms, but that gives a rather slanted vertical angle from servo ball to swash ball - so much that I'm not 100% it's ok, as there seems to be a max for how big an angle the servo ball links can handle before popping off. My swash throw is nothing extreme, around +/- 10 degrees and +/- 6 degrees. Any good advice on this?
Posted on: 6/17/2009 5:09 PM by Author "holsen"
in the forum "RC Helicopter Beginners Forum"
http://www.rcuniverse.com/forum/fb.asp?m=8859977
RE: Art-Tech Shark 450
Go and watch the videos from Finless Bob (google them) and get a simulator that works. That should get you going.
Posted on: 6/10/2009 11:30 AM by Author "holsen"
in the forum "RC Helicopter Beginners Forum"
http://www.rcuniverse.com/forum/fb.asp?m=8841051
RE: Art-Tech Shark 450
Is this the one at $60? Says it's a 450S, not a V2. Or is it this at $135 (says V2, but not PE)? And for my existing Shark: "if I wanted to complete the conversion to be able to use stock Align parts on aux gear as well, can I replace the counter gear shaft assembly with an Align?"
Posted on: 6/7/2009 2:23 AM by Author "holsen"
in the forum "RC Helicopter Beginners Forum"
http://www.rcuniverse.com/forum/fb.asp?m=8831908
RE: Art-Tech Shark 450
Thanks. I'll have a look at http://www.ehirobo.com/shop/product_info.php?cPath=173_175&products_id=6308. And if I wanted to complete the conversion to be able to use stock Align parts on aux gear as well, can I replace the counter gear shaft assembly with an Align? Also considering a HK-450 T-Rex V1 clone. Reading through it's looong thread now. I could have it as a cheaper heli to practice with, sharing several spare parts with the Shark. What do think? Good or bad move?
Posted on: 6/6/2009 3:18 PM by Author "holsen"
in the forum "RC Helicopter Beginners Forum"
http://www.rcuniverse.com/forum/fb.asp?m=8830640
RE: Art-Tech Shark 450
Great with the CopterX head. I think one of my two tail output shaft bearings is a little rough after the crash. Can those bearings be bought alone? For the T-Rex?
Posted on: 6/4/2009 4:17 PM by Author "holsen"
in the forum "RC Helicopter Beginners Forum"
http://www.rcuniverse.com/forum/fb.asp?m=8825742
RE: Art-Tech Shark 450
Will a CopterX Metal Main Rotor Head Set V2 fit the Shark? PS. I will be back on what Align parts fit my Shark soon. Trying them out right now.
Posted on: 6/4/2009 3:50 PM by Author "holsen"
in the forum "RC Helicopter Beginners Forum"
http://www.rcuniverse.com/forum/fb.asp?m=8825670
RE: Art-Tech Shark 450
Excellent help rotorhead. Thanks! Does it matter for which T-Rex 450 version I order for flybar and boom? I see there's both a 1006 and 1264 for flybar. And perhaps also different version for the boom. My Shark boom support arms had ball joints at the frame - Rex doesn't, but still fits ok? Rex has 1253 and 1016 What about servo pushrods and ball joints for the head? I guess they are fit from the Rex too. Once I know what T-Rex version to buy to I will post relevant part numbers for others to use for easy reference.
Posted on: 6/1/2009 4:40 PM by Author "holsen"
in the forum "RC Helicopter Beginners Forum"
http://www.rcuniverse.com/forum/fb.asp?m=8813064
RE: Art-Tech Shark 450
Thanks. The main gear did indeed fit and is running fine. Or was, until this evening when the Shark just dropped to the ground :( First crash. Damage is not severe though (at least not by current quick investigation). I need a new flybar - will that need to be Shark specific? And the boom, if coming from a t-rex, does it has to be a specific version? Are they all carbon (does it matter)? Boom supports / braces - from t-rex? Tail rotor axel needs to be Shark as I understand it.
Posted on: 5/30/2009 5:41 PM by Author "holsen"
in the forum "RC Helicopter Beginners Forum"
http://www.rcuniverse.com/forum/fb.asp?m=8811870
RE: Art-Tech Shark 450
Will any T-Rex 450 upper main gear fit an Art-Tech Shark 450 heli? My stock Shark upper main gear is stripped an I'm having trouble finding any dealer with the item in stock. My gear has 6 screws in it - different from the T-Rex I've seen which have 4. But if I get a set like these, http://www.fast-lad.co.uk/store/hs12...ar-p-1134.html, do you think it will work? I've read that the upper main gear with bearing should fit, but not the lower main gear - but will the original Shark lower gear fit on/with the T-Rex upper main gear without problems?
Posted on: 5/26/2009 4:29 PM by Author "holsen"
in the forum "RC Helicopter Beginners Forum"
http://www.rcuniverse.com/forum/fb.asp?m=8800390
RE: Art-Tech Shark 450
Front left adjustment knob on included Art-Tech radio with RTF Shark 450. Adjust switch (lower right) needs to be unlocked for adjustment to have an effect.
Posted on: 4/25/2009 9:15 AM by Author "holsen"
in the forum "RC Helicopter Beginners Forum"
http://www.rcuniverse.com/forum/fb.asp?m=8713834
RE: Art-Tech Shark 450
You can lower hover rpms if needed by turning PIT down, but be aware that you can't know what it was set to from the dealer/factory before you play with it, as the knob can be turned with effect if adjust switch is set to lock.
Posted on: 4/25/2009 8:48 AM by Author "holsen"
in the forum "RC Helicopter Beginners Forum"
http://www.rcuniverse.com/forum/fb.asp?m=8713782
RE: Scorpion -6 for both 3S A123 and 3S LIPO / max beginner flight time
The TX I have is the one included in the Art-Tech 2008 Shark 450 RTF. It's a 2.4 GHz 6ch E-Fly 100 C, shown at http://www.art-tech.cn/english/ArticleShow.asp?ArticleID=236 with manual at http://www.art-tech.cn/english/pdf/6CH%20TX%20EN%20Manual.pdf. Will it be feasable to do cautious hover training with the -6 on lipos until I get the A123 packs (in a couple of weeks I guess)? Can I use the Scorpion Commander V2 ESC to make the motor gentle enough to handle (e.g. governor mode at 2600 rpm or similar to restrict head speed)?
Posted on: 4/5/2009 10:42 AM by Author "holsen"
in the forum "T-Rex heli"
http://www.rcuniverse.com/forum/fb.asp?m=8650452
RE: Scorpion -6 for both 3S A123 and 3S LIPO / max beginner flight time
I think I will stick to A123s, unless the new Hyperion Generation 3 with promised "5C speed charging and up to 4 times the cycles" will blow A123s advantage away (although they still haven't direct zip-charging and still have fire risk). The main reason for wishing temporarily lipo support with the -6 was that I won't get the A123 packs until several weeks from now, but could be lucky and get a Scorpion kit (-6 + 60A V2 heli ESC) in a few days for easter holidays, so I could practice with the single stock lipo I have already (can't fly right now as stock motor axle snapped because of fabrication fault with pinion gear boring being a little too big :(). On the stock 2.4 GHz TX I can adjust PIT and PLT, and I might change the pinion gear - that's the options currently available for lowering HS with -6 on lipos. I am considering a Spectrum 6DXi or 7DX, but don't know how much it will give me, and if it's ok to just get the cheaper 6 channel 6DXi. If I stick to A123s will the combo with the -6 give me about the same flight time as with the stock motor (think it's 3800 Kv) on lipo? Would I need around a 11T pinion gear with the -6 on 3S A123 to get a reasonable HS around 2600 rpm for good long beginner flights? Any worthy alternatives to the Scorpions?
Posted on: 4/5/2009 4:43 AM by Author "holsen"
in the forum "T-Rex heli"
http://www.rcuniverse.com/forum/fb.asp?m=8650015
RE: Scorpion -6 for both 3S A123 and 3S LIPO / max beginner flight time
Note that the only reason for me to go with a 4400 Kv is to compensate for the lower voltage provided by a 3S A123 pack. I'm not at all into 3D. Have just started and will be training very basic hovering and forward flight for quite some time. But would like the easy and fast handling of A123 packs, and need to decide what hardware to get to make this setup work, and with as long flight time as possible.
Posted on: 4/4/2009 10:15 AM by Author "holsen"
in the forum "T-Rex heli"
http://www.rcuniverse.com/forum/fb.asp?m=8647620
6.0 volt BEC output to servos - can they all take it?
I'm looking at upgrading my Art-Tech Shark 450 to a Scorpion 2221-6 for use with 3S A123 cells. I'll need a new ESC for higher current, and have looked at Scorpion Commander 15V 60A Heli ESC V2. But this 60A heli version is special since it features "a 6.0 volt BEC to provide extra power to your servos for more speed and more torque" (instead of normal 5.0V). The question then is if the standard servos can handle that? How will I know? Is it common that they can, or is it a no-go with the BEC ESC/BEC for me?
Posted on: 4/4/2009 9:35 AM by Author "holsen"
in the forum "RC Helicopter General Discussions"
http://www.rcuniverse.com/forum/fb.asp?m=8647320
Where to get ready-to-use (3S) A123 packages?
Hi I want to go A123 on my 450 heli and need 3S A123 packages, preferably with Deans connector and balancing plug. I know they can be homemade, but I'm going for someone already made now. Here's what I have found until now, but living in Denmark/Europe, they are either along way away, not in stock, with wrong or missing connector etc. US, $50, Hypersonic pack http://cgi.ebay.com/A123-9.9V-2300-Li-Ion-Nano-Phosphate-Hypersonic-Battery_W0QQitemZ360139585171QQcmdZViewItemQQimsxZ20090317?IMSfp=TL090317201008r6590 US, $60, custom made http://www.battlepack.com/LiFEPO4.asp US, $57,50, custom made http://www.robotmarketplace.com/products/battery_build_li-ion.html AT, €50 http://shop.lindinger.at/product_info.php?cPath=1335_1350&products_id=67769 DE, €57 http://www.modellbau-bichler.com/graupnernanophosphate-c-74_1027_1028.html?osCsid=b1c64a39671622cb8f3063d0f638824d Can anymore provide more dealers?
Posted on: 4/4/2009 7:26 AM by Author "holsen"
in the forum "Batteries & Chargers"
http://www.rcuniverse.com/forum/fb.asp?m=8647302
Scorpion -6 for both 3S A123 and 3S LIPO / max beginner flight time
I have been looking at getting a Scorpion 2221-6 4400 Kv for my 450 size Art-Tech Shark heli, for use with A123 3S packs (lower voltage, need for higher Kv). But can I also use it with existing 3S lipos, or will it be way too aggressive? Or can I just put like a 10T pinion on it, and make it behave ok? I'm a beginner, so I don't need extreme power, rather long flight times. The Scorpions are recommended for the A123 setup, but it is a bad choice in my situation, being a beginner? If not used hard, will the Scorpions give as long a flight time as other motors, or? And will a high performance motor use as little power as a regular motor (lower Kv) if it's flown easy and not pushed to higher HS that the regular one (by lowering pinion gear and/or reduce throttle)?
Posted on: 4/4/2009 7:17 AM by Author "holsen"
in the forum "T-Rex heli"
http://www.rcuniverse.com/forum/fb.asp?m=8647299
RE: Art-Tech Shark 450
I'm flying it with the stock lipo, but am nowhere close to pushing it to it limits since I've only just started rc. The reason I'm considering a more efficient motor is for usage with A123 3S1P LiFe batteries. I only own the single stock lipo and is tempted to start directly on A123 instead of lipos, both for a super fast zip charging (not even needing a real charger), for their much longer recycle count and better security (both on normal storage, charging, impact etc). Think these qualities are attractive. The alternative is to buy at least 5 lipos from hobbycity and then preferably a charger that can take more than one at a time, else it's too much to handle charging 5 batteries a day in the evening (don't think I have enough time to wait if I practice after work and then have to charge/monitor each one at a time in the late evening).
Posted on: 4/3/2009 6:06 PM by Author "holsen"
in the forum "RC Helicopter Beginners Forum"
http://www.rcuniverse.com/forum/fb.asp?m=8602812
RE: Art-Tech Shark 450
[quote]ORIGINAL: ginnz i cant believe how much of a difference the radio system makes! since getting my Dx6i setup for the shark, ive had it out 3 times, i can actually keep it in a stable hover..... i mean, my first try with the dx6i and it was almost like hanging this thing from a string! I never would have thought just swapping radios would be such a change! I was hovering it last night on my street in thesnow with 20 kph winds without a problem. man, im impressed! [/quote] And this refers to switching from a stock non-2.4-GHz system, right? I'm asking since the Shark 450 I've got is stock RTF with 2.4 GHz, and I need to know how much of an improvement I can expect buying new radio gear for it.
Posted on: 4/2/2009 4:09 PM by Author "holsen"
in the forum "RC Helicopter Beginners Forum"
http://www.rcuniverse.com/forum/fb.asp?m=8642400
RE: Art-Tech Shark 450
It seems people in here are very glad for a TX upgrade to their Shark. Is this primarily because they came from a 35/72 MHz system to 2.4 GHz or because of the TX itself? I'm already on 2.4 GHz with the stock Shark and am considering buying the 6DXi, but suddenly came to think if it was more of a 2.4 GHz issue or the actual TX that was much better? And what about a Futaba? Is it much better and worth the extra money? Or is this a religious question, kind of like asking about which oil to use in my motorcycle [;)]
Posted on: 3/22/2009 7:42 AM by Author "holsen"
in the forum "RC Helicopter Beginners Forum"
http://www.rcuniverse.com/forum/fb.asp?m=8602879
RE: Art-Tech Shark 450
Are there common quality issues with the Shark? I think I'm seeing more and more of it, unfortunately. I've used under 10 batteries with it, and hardly been in the air, only doing very basic RADD's training and adjusting. Heading hold has never seemed to work as it keeps drifting no matter what gain is set to, and then the tail servo just quit on me. Well, head for the store and buy a new one (no guarantee although I haven't done the least thing wrong or even being close to a crash). Back out for training and within a few minutes the motor axle snaps. Argh! What a piece of sh.. I think [>:] Got to the dealer again and they told me they have had three similar incidents with the Shark (but had sold many without it seemed) - all with a pinion gear being just a tiny little bit too big in the hole, so it's not a 100% tight fit around the axle, apparently causing stress to the axle, breaking with a few hours of use. It seems the axle on the stock motor doesn't follow standard 3,2mm diameter they said, so they didn't have a pinion gear that matched, but will contact Art-Tech Monday to hear what they can do (and presumably get some new axles and correctly matching pinion gear send). A little disappointing that wasn't already done, since three other cases were already in (forgot to hear have they handled those cases). But I was left with no immediate solution and must wait a week or more now. I have also heard stories of the tail blades flying off suddenly. Several reports of this found in forums and now also in a Danish printed article about first experiences with the Art-Tech. I'm thinking more and more this was not the right choice of heli... What do think? Should I really have to put in double up in cash to get a custom build Beam 450 to get a decent quality or are just a few of us extremely unlucky?
Posted on: 3/22/2009 7:37 AM by Author "holsen"
in the forum "RC Helicopter Beginners Forum"
http://www.rcuniverse.com/forum/fb.asp?m=8602872
RE: Art-Tech Shark 450
[quote]ORIGINAL: rotorhead0207 The stock esc will have no trouble arming with a 3S A123 because from experience it'll arm with a lipo at 9.2 and you can get into the programming to set it for the voltage at cut off. It's not published but any of the generic programming instructions work on the ArtTech esc. [/quote] Can you help explain how this programming is done? But even if LVC could be set low enough many report on helifreak.com that the lower volt with 3S1P A123 will draw more amps and exceed the capacity of the standard ESC+BEC.
Posted on: 3/21/2009 12:24 PM by Author "holsen"
in the forum "RC Helicopter Beginners Forum"
http://www.rcuniverse.com/forum/fb.asp?m=8600467
RE: Art-Tech Shark 450
[quote]ORIGINAL: rotorhead0207 holsen: the gyro is connected to channel 5 and yes is toggled off and on, your setup to avoid binding the servo is the way to do it. [/quote] Mine isn't and I'm 100% it never has been - the 1-pin lead for the gyro gain from the gyro is shorter than the other multi-pin-lead and it can't reach the receiver. My gyro is placed high, behind the rotor head
Posted on: 3/19/2009 11:52 AM by Author "holsen"
in the forum "RC Helicopter Beginners Forum"
http://www.rcuniverse.com/forum/fb.asp?m=8594088
RE: Art-Tech Shark 450
Does anyone have specs on the included motor on a 2008 Shark 450 V2? I'm planning on going A123 with it, and need to know the kv rating of the included motor to determine if I need a more efficient one like Scorpion 4400 kv. Anyone got good experience going A123 with their Shark? Good balance? Using 3S1P? With what ESC, motor and pinion?
Posted on: 3/19/2009 4:28 AM by Author "holsen"
in the forum "RC Helicopter Beginners Forum"
http://www.rcuniverse.com/forum/fb.asp?m=8593313
RE: Art-Tech Shark 450
My Shark 450 V2 (believe it's a 2008 model) with V3 gyro is out of adjustment. What are recommended initial settings of PIT and PLT for a beginner setup? And for limit and gain on the gyro? Is it true that the gyro is always in heading hold mode? Since the gyro gain is not connected to the receiver it must be so I believe. Even if it was, channel 5 of the included radio is only a switch with no variable adjustment, so gain couldn't be adjustment anyways - only perhaps toggled between to predefined settings - right? I have problems getting the gyro to work as expected. It doesn't keep heading hold, apparently no matter what the gain setting is. Has anyone experienced this? I adjusted the limit to a lower setting since the servo tail boom throw was too big, bending and stressing the servo when trying to exceed physical limits of the tail when giving max rudder stick while standing still. I adjusted it so, with dual rate off, full rudder stick matches full physical range on tail, and adjusted the servo distance on the tail boom so the range was equal length to both sides. Does that seem correct to you?
Posted on: 3/19/2009 4:24 AM by Author "holsen"
in the forum "RC Helicopter Beginners Forum"
http://www.rcuniverse.com/forum/fb.asp?m=8593310
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