View Full Version : Discussion Katana 106" 15s 11,000watt
Jocke
Mar 06, 2007, 04:10 PM
Preparing the Katana for the new season, spring time is coming :)
New final version of the Jeti SPIN200 will be used, hope to puch the motor to 10kw with this, also use the logger to se inflight data, will save 135g from prototype version.
Will test 29x12" Mejzlik instead of 28x12" that drew 9kw of the setup, hope i dont have to go upp to 30" for 10kw, 28" is large enough and the plane flyes clean tru aerobatic with little torq movement.
15s2p Flightpower EVO20 7400 batterys will be used, later maby also higher C rated version.
Predator 30/8 will be used as before.
Will post as soon as i have some new static tests done.
Larry3215
Mar 06, 2007, 09:23 PM
Jocke, can you refresh my memory with the specs of the plane again? Weight, span, area?
Thanks!
Larry
Jocke
Mar 07, 2007, 01:44 AM
Worldmodels 36% Katana
http://web.telia.com/~u15807747/
2,7m 106" wingspan
2,38 m, 94" length
Wing Area: 2100 Sq. In
All up weight 12kg, 26Ibs
Setup i have been flying with:
165A
54,87v
28x12" Mejzlik
6100rpm
9054w
Larry3215
Mar 07, 2007, 02:14 AM
Thats awesome!
Thanks!
larry
Jocke
Mar 07, 2007, 06:46 AM
Will drill the 29" Mejzlik today to fitt the Preddator motormount... i HATE to drill in these props, they are much to nice for that! maby i can use glue instead to fitt the prop ;)
kmp647
Mar 07, 2007, 07:10 AM
Jocke, is the spin 200 rated to 15s? the specs say 14s , which is not to good because most of us have 5s packs to use in this type setup 3x5=15s
also could this plane be flown ok on 15s 5000s , a 1p setup?
or do you think to hard on the cells?
Kevin
Jocke
Mar 07, 2007, 07:53 AM
It is possible to run the SPIN 200 and 300 on 15s Lipo, i think they need to lable the controllers 14s 60v max as recomendation becas of high voltage rules in some european countries, you can set 15s in the Jeti BOX, its also possible to load it, generally peak current up to 10% more for 30 seconds... but i dont know abaout warranty by Jeti in these matters, i guess you push it to these levels at your own risk, but i am not sure, recomend you to mail Jeti and ask.
It is very important to have good cooling over the controller!!!! were talking 11+kw !!!!
The big Jeti 200 have always been possible to setup on 15s Lipo, now also in the final product version!
Regarding batterys, my powersystem even on 9kw is alittle overkill i fel for this airframe and weight, if your cells are 30c and they hold voltage good you could have 8kw peak... that would be enough with good power weight i think.
My current batterys can handle 11kw burst and im aming for 10kw, i might have to upgrade for higher C rated Flightpower in future to have some margin regarding heat and sycle life... time will tell.
Jocke
Mar 07, 2007, 08:06 AM
Many of you have already seen these movies, will get new soon ;) i have now uploaded them on Youtube.
Static test
http://www.youtube.com/watch?v=o6tARHclfds
1st flight
http://www.youtube.com/watch?v=1fNMRLYzhfw
2nd flight
http://www.youtube.com/watch?v=CpSZ-9HA0ZA
No advanced aerobatics in these movies becas i had very little experience with the plane and powersystem, but you can hear and get a feel of it :)
Jocke
Mar 08, 2007, 12:08 PM
Improved radio installation.
Jocke
Mar 08, 2007, 12:14 PM
More work done!
Tor-DK
Mar 08, 2007, 02:28 PM
Hi Jocke
Very nice. Looking forward to some wild videos :)
It's acutally very easy to make the anti spark feature yourself. You just make a smaller wire with a 100kOhm resistance. Connect the small wire first (i.e. use the the ballancer connectors of the batteries).
Jocke
Mar 08, 2007, 02:50 PM
Im afraid im not "wild" flyer type... but i will try to manage som nice slow rols just for you ;)
Im aware of your anti spark feature, but i think an anti spark funktion should be on every controller for 10-15s, also even more important now with the new 25-50c Lipo packs.
Jocke
Mar 10, 2007, 06:48 PM
Plettenbergs new bigger/longer Predator is now oficial http://www.plettenberg-motoren.com/UK/Motoren/aussen/Predator37/Motor.htm
15kw on a 1,9kg motor is realy good!
Motor have been tested/used with succes
http://www.plettenberg-motoren.com/UK/erfolge.htm
I guess i need a bigger plane now ;)
Jocke
Mar 11, 2007, 04:13 PM
Wheel pants or not?! hard to decide, looks good, but often problem on gras.
flypilot
Mar 11, 2007, 04:57 PM
I think you should put them on, if you leave plenty of room for the tire there will be little problem on gras runways...in my exprience..
Tor-DK
Mar 11, 2007, 04:58 PM
On... :)
Jocke
Mar 11, 2007, 05:02 PM
Guess i have some more work to do then ;) put them ON! thanks for your input.
Jocke
Mar 13, 2007, 12:54 PM
Progress
flypilot
Mar 13, 2007, 01:04 PM
Much better with the pants on :-)
Tor-DK
Mar 13, 2007, 01:54 PM
I agree, even thought the real one doesn't have them.
Jocke
Mar 13, 2007, 02:00 PM
I agree, looking good, will se how it works on gras later, i can always remove them.
duckalliance
Mar 13, 2007, 02:03 PM
That is the largest electric motor i have ever seen!
jarvis2542
Mar 13, 2007, 09:27 PM
wow........................
chinehamgeorge
Mar 16, 2007, 07:04 PM
Hi Jocke
Nice setup and nice videos, What video editing software are you using?
Cheers
George
My small 2Kw planes look tiny in comparison :(
Jocke
Mar 17, 2007, 07:04 AM
We have used iMAC with Garageband for music and iMovie HD, for video editing.
We used iMovie HD 6.0.3, then we exported the movie within iMovie to QuickTime-movie, using expert preferences - broadband middle. Just remember that this is a translation from the swedish version so i dont know the real translations on us version. The computer is an iMac G5 1,7Ghz, 1,5GB RAM, 17" we also use live instruments as guitars for some music in other movies, post sample later.
Love MAC ;)
Jocke
Mar 20, 2007, 12:13 PM
I have now done static load test with the 29x12" Mejzlik prop with the new SPIN200 controller, the power was /&%¤#"(/&# ;) on full burst i was up to 10,000watt.
SPIN200 runned the motor realy well despite the higher loading, smoth startup, good acceleration, no losing in syncro at any time!
To push the powersystem further, and get more exact data figures i need help, now i was alone holding the plane and reading data, i also need warmer weather, today was cold only 5+C outside.
But it feels realy good to have breaked the 10kw barrier :) and no cheating.. i was only using one motor- one ESC, dident even nead gearbox ;)
Jocke
Mar 20, 2007, 12:23 PM
Pics from todays testing.
Jocke
Mar 21, 2007, 09:10 AM
Good news, Mejzlik have developed new 3bladed props with same thin electric blade profile as the superb electric props, diffrens is it has standard thick hub for gas motors. These props should work very good on big electric motors like the Terminator, Predator, A150, A200, large actros, i will try to test the 3x27x12" TH on the predtaor, it should load simular as the 29x12" 2 blade but with little less static trust, bennefit will be better ground clerance and less torq movment thanks to the smaler diameter.
Mejzlik is also in the planning stages of developing bigger E props up to and maby over 30" to go with these new powerfull powersystems avalibul on the market today and future.
ss2p
Mar 24, 2007, 06:02 PM
You might consider the new hacker A100/150/200 series that produces up to 15000watts.. Insane power..
Jocke
Mar 25, 2007, 05:41 AM
There is also the Predator 37 15kw on 1,9kg motor ;)
For this plane 10+kw is well overpowered, it had plenty of punch with 9kw, to go up to 15+kw a bigger airframe is needed.
I hope to test the new actro 60XL this sesone.
Jocke
Apr 10, 2007, 12:43 PM
New prop arrived today :) looking good, weight only 347g, blade shape almost the same as my 26" electric Mejzlik, will be interesting to test it. Im not looking forward to start drilling in this one.
kmp647
Apr 11, 2007, 04:24 PM
Nice prop!
I wouldnt want to drill it either, but I guess you cant ream it out.
Jocke
Apr 12, 2007, 02:53 AM
I have to ask a friend to do it, i dont want to take part in this crime!
Jocke
Apr 16, 2007, 01:42 AM
This is how the 3blade prop looks on the Katana... i like it!
Been running alot of static tests this weekend, i have had interference problem when motor is accelerating, but its almost all fixed now.
Larry3215
Apr 16, 2007, 02:35 AM
Just the single thru bolt is all thats holding the prop?
I thought most of the extreem power setups had multiple smaller bolts holding on the prop?
Looks great tho!
Larry
Jocke
Apr 16, 2007, 03:04 AM
No no... the prop is only there for display pics! it needs to be drilled first and 6more bolts installed before testing.
Jocke
Apr 16, 2007, 04:50 PM
Interference problem fixed, thanks to my friend Mats and J.Tinka from Jeti model, so today i did first flight with the Katana 07.
Setup was "mild" only using 28" prop and reduced timing setting on the SPIN, 137A 6040rpm from Jeti BOX reading after flight, motor time 9min,24sec, total flight time 7min,30sec, controller only 54c max, power on time 14min, capacity used about 4850mAh from 15s2p 7400 batterys.
TONS of power... only need half trottle for vertical uplines, sound from prop and plane is awsome, one can realy hear the brutal power even from this "mild" setup... waiting for new 25c batterys to load this setup more with optimal timing and bigger prop.
Wheel pants almost fell of in first landing... they need to be off! :(
gouang
Apr 17, 2007, 01:24 PM
Interference problem fixed, :(
How was it fixed?
SD_Raptor
Apr 17, 2007, 02:17 PM
Awesome setup. Looking forward to hearing more.
Randy
Jocke
Apr 17, 2007, 03:20 PM
Well from experience from todays flying the problem is 95% fixed, still some smal glitches when motor is accelerating, maby 1 or 2 times on every flight, will do some more to the powersetup and radio installation.
What i have been done so far,
Hard top antenna
Diffrent recivers, tests
Changed soft antenna playcement in boddy
Changed servo extension playcment
Ferit rings on controller and every extension wire
Moved reciver from carbon and away from powerbox
New controller, motor not losing syncro
ESC reciver wire conected directly to powerbox
These changes have improved range 3x times and makes it possible to load up to 10kw burst static... but still glitches when flying on 7kw setup.
To do!
Shorten wires from motor to controller
Clean bullet conectors and look tru soldering
Move powerbox away from reciver
Remove carbon plate
feathermerchant
Apr 17, 2007, 06:42 PM
Have you any 18-20" 3bladed Mejzliks you want to sell?
Jocke
Apr 18, 2007, 01:48 AM
No sorry.
AggieFlyer
Apr 18, 2007, 08:19 AM
Well from experience from todays flying the problem is 95% fixed, still some smal glitches when motor is accelerating, maby 1 or 2 times on every flight, will do some more to the powersetup and radio installation.
What i have been done so far,
Hard top antenna
Diffrent recivers, tests
Changed soft antenna playcement in boddy
Changed servo extension playcment
Ferit rings on controller and every extension wire
Moved reciver from carbon and away from powerbox
New controller, motor not losing syncro
ESC reciver wire conected directly to powerbox
These changes have improved range 3x times and makes it possible to load up to 10kw burst static... but still glitches when flying on 7kw setup.
To do!
Shorten wires from motor to controller
Clean bullet conectors and look tru soldering
Move powerbox away from reciver
Remove carbon plate
Did you notice any glitching before switching to the 3-bladed prop? If not, have your tried switching back to an earlier prop to see if the glitching goes away?
Jocke
Apr 18, 2007, 08:32 AM
Im flying with the original 28x12" Mejzlik standard now.
SD_Raptor
Apr 18, 2007, 10:28 AM
Well from experience from todays flying the problem is 95% fixed, still some smal glitches when motor is accelerating, maby 1 or 2 times on every flight, will do some more to the powersetup and radio installation.
What i have been done so far,
Hard top antenna
Diffrent recivers, tests
Changed soft antenna playcement in boddy
Changed servo extension playcment
Ferit rings on controller and every extension wire
Moved reciver from carbon and away from powerbox
New controller, motor not losing syncro
ESC reciver wire conected directly to powerbox
These changes have improved range 3x times and makes it possible to load up to 10kw burst static... but still glitches when flying on 7kw setup.
To do!
Shorten wires from motor to controller
Clean bullet conectors and look tru soldering
Move powerbox away from reciver
Remove carbon plate
Jocke,
Are the leads from motor to ESC soldered or bullet connectors? A well made soldered connection is the better choice.
The leads from the batteries to the ESC also look very long - at least as long as the batteries. If it is not possible to reverse the batteries to make the leads shorter, then the leads should be twisted together as tightly as possible.
Considering the total power, the receiver and its antenna should be as far as possible from the power set.
The CF plate should be no problem the conductivity of the woven carbon is so low that it might as well be wood, from an electromagnetic viewpoint.
Are all of your servo leads twisted?
Looking forward to more video!
Randy
Jocke
Apr 18, 2007, 12:28 PM
Motor and ESC is connected with 6mm gold bullets, now also 8cm shorter wires total 12cm, maby i can shorten this even more.
All servo wires is custom made and twisted, these wires often used in big Jet modells.
Carbon plate had been removed just to be sure, both powerbox and reciver with all the wires has been reinstalled, now also reciver is further away from powerbox and powersystem.
Tests will tell if these changes makes any diffrens....i truly hope so! thanks everyone for all the help, i apritiate it.
Jocke
Apr 19, 2007, 10:10 AM
New installation pic, ESC-motor leads 8,5cm shorter now, weather is real bad here now so tests will have to wait, will try to drill the new 3B prop instead.
SD_Raptor
Apr 20, 2007, 06:57 PM
New installation pic, ESC-motor leads 8,5cm shorter now, weather is real bad here now so tests will have to wait, will try to drill the new 3B prop instead.
Nice, neat installation. I hope the next tests give 100% reliability!
Good luck and clear skies!
Randy
Jocke
Apr 23, 2007, 09:15 AM
Thank you Randy!
Todays tests and flight worked very well! no sign of interference at any time during flight, total flights 2x 10min with some nice aerobatics, this baby is so stable during high alpha, harriers and rolls, also first time i puched her tru some spinns and slow knife edge, hovering on this mild setup about 50% trottle with lotts left for pull outs, she realy gives me confident and a happy smile :)
Jocke
Apr 30, 2007, 06:43 AM
http://www.rcgroups.com/forums/showatt.php?attachmentid=1287899
Uploaded 11mb movie from 7kw fligt, a bit windy and dark, evry flight im pushing her little harder and lower.
SD_Raptor
Apr 30, 2007, 10:14 AM
http://www.rcgroups.com/forums/showatt.php?attachmentid=1287899
Uploaded 11mb movie from 7kw fligt, a bit windy and dark, evry flight im pushing her little harder and lower.
Jocke,
Looks great to me! She has a nice sound in the air and looks very stable.
Congratulations.
Randy
Jocke
Apr 30, 2007, 11:46 AM
Thank you ;)
Ed Lyerly
Apr 30, 2007, 12:31 PM
Jocke,
Congratulations ! Very nicely done. Thanks for sharing the video :).
Ed
Jocke
May 02, 2007, 02:48 AM
Will try to get some more shots of her in better weather.
Jocke
May 13, 2007, 10:13 AM
http://www.youtube.com/watch?v=KIwY24dJTk8
Flight movie from an electric flight meeting in Vallentuna Sweden.
Ed Lyerly
May 13, 2007, 10:33 AM
Well done Jocke :).
She seems to be everything you had hoped for.
Thanks for sharing the additional video :).
Ed
duckalliance
May 13, 2007, 12:28 PM
She's a lovely model, not often (or ever) I've seen an electric model of that size do those sorts of things!!
Jocke
May 13, 2007, 01:23 PM
Thank you for your coments, i appreciate that.
She flyes very mature, can do harmonic slow aerobatics as well as some nice 3D, i trust her and the powersystem more and more, each flight i go little lower pushing a little harder ;) who knows how she will perform in end of this summer!?
If you go directly to youtube, you can watch it in full screen.
LaxLife
May 13, 2007, 01:38 PM
Jocke, that is an awesome Katana and an amazing video. 15s! You are my hero! Not only for your stick skills but for the courage to wire that much power into a plane. I've got a top flite giant scale P-51 that I'm converting with a Neu2215, SoloProps 4 bladed, Spin200 ESC and 12s TP9000 xTreme lipos. It should rocket along nicely but I don't think it will approach the power you've harnessed. The new Hacker 100/200 motors and 300 Amp ESC's are coming soon and then there won't be anything we can't convert to electric.
Jocke
May 13, 2007, 02:00 PM
Thank you LaxLife, to activate the 15s is no big deal thanks to the Jeti SPINs anti spark feture, but it is a little scary starting the motor, not to mentione static load tests ;)
The P-51 sound very interesting, make sure you upload alot of pics and information about it later!
This year with the big Predator and big Hacker on the way alongside with Jeti 200/300, we can power anything, including man carrying toys :)
LaxLife
May 14, 2007, 06:57 AM
"Man carrying toys"??
Yikes! you first...
Jocke
May 14, 2007, 03:25 PM
Think i will try with the cat first... ;)
Jocke
May 21, 2007, 03:34 AM
2 movies from latest event with the Katana.
http://www.junkshop.nu/flyg/paldalen_20070517/jocke_big.wmv (40mb)
http://media.putfile.com/Modellflygets-Dag-07
LaxLife
May 21, 2007, 06:36 AM
Very Nice Jocke, big and beautifully driven.
SD_Raptor
May 22, 2007, 02:21 AM
Jocke,
Great rolling circles! Smooth as silk. The yellow plane stand sout well with a cloudy sky also.
Congratulations!
There are rumors of a 20kW motor under development - easily big enough for a 40% plane. Now to find a sponsor......
Randy
Jocke
May 22, 2007, 03:03 AM
Thanks!
20kw is already avalibul from RS in germany, i wouldent be surprised if the new big Predator in fact can handle little more than 15kw ;)
and it will have no problem at all of pulling a 40% bird. In fact i think the Katana powersetup on 10kw would be great in a 3m-3,2 18-19kg aerobatic bird, its overkill for the Katana.
Jocke
May 23, 2007, 12:18 AM
Friend of mine took some pics from the latest event, also my brother made a smal movie.
http://media.putfile.com/Modellflygets-Dag-07
Jim K.
May 23, 2007, 12:40 AM
So who finances a project like this? ....
You yourself, or do you have help?
Jim
Jocke
May 23, 2007, 12:49 AM
The project is all sposored, also working as a flying test bench.
Jocke
Jun 29, 2007, 09:28 AM
Time for some real powa! EVO25, think 15+kw setup will be no problem... looking forward to test in the Katana soon.
ou7475
Jul 02, 2007, 03:37 PM
Jocke, Have you had any timing issues with the Actro or plet and the Spinn 200. I am running the Spinn 200 on a axi 5435/16 and have had many problems. i have thrown 2 sets of magnets and am having timing problems. I have read many of your post and was thinking about going with a Actro or plet to replace my Axi. My AUW is 16lbs with the Axi 5434/16 and FP 6s1p X 2 5000mah. BTW my plane is the Aeroworks Extra 260 50cc.
Jocke
Jul 02, 2007, 05:59 PM
The actro motors needs fast controllers with fixed hard timing 24-30 degrees, to run all of actro motor sizes with sucsess have been the Jeti controllers, to replayce the Axi5345/16 one could use the actro 60-200 on 10s Lipo and the Mejzlik 26x15" or simular carbon prop 26x12", if you need more power have a look at the 60L, the 60 serie is not best motor for 3D becas of fairly slow trotteling compared to big Pletti outrunners for exampel.
I think the problem with your Axi has to do with the fact that you are flying aerobatic/3D, the Axi doas not have full suport of the magnets/housing as the actro design or Plettis tripple ball bering design that fully support the housing from vibration during aerobatic and tough manuvers, long and big powerfull outrunners that dont have this often breaks bearings or trows magnets, the axi is fairly easy for a controller to run, i belive its an 14pole design so you should have 8khz and start at 24degrees timing, with big prop load maby some trottle delay and soft start also.
Best replaycement for your 900g Axi i think would be the Plettenberg Terminator 30-8, 900g inc prop system, can be runned up to 14s. On 4,4kw it holds 88+% and spins props up and around 26" for this motor i would use the Jeti SPIN 99 or 200, recomend you to mail and contact Plettenberg directly for detaled information and recomendation, they have good support.
http://www.plettenberg-motoren.com/UK/Motoren/aussen/Terminator/Motor.htm
Jocke
Jul 21, 2007, 07:44 AM
Oh yeah!!! static load tests with the new batterys... awsome power with the EVO25 and 3blade prop, went up to 12kw at one point, cant beleve how she pulled! 233A and batterys on first sycle 3,4v/cell!
This sems nice for next flight ;)
25degres timing
27x12"TH 3blade Mejzlik
216A
51,22v
6200rpm
30sek load
24c degrees out
Motor housing 53c
Winding 60c
Battery 40c
Controller 44c
850w/kg
11kw :)
GWRIGHT
Jul 21, 2007, 09:36 PM
allready being done. There is a canadian flying powered parachutes (man-carrying) with electric power and then there are the self-launching gliders, one of which only uses 13KW, the others 20. There are several examples of fullsize homebuilts that fly on 20 horsepower, one that flew on 9 horsepower. 20 horsepower is only 15 kilowatts.
"Man carrying toys"??
Yikes! you first...
Wingtips24
Jul 23, 2007, 12:28 AM
Hey Fellas,
I have a question,
What are those circle rings around the servo wires. I am thinking magnets of some sort that may reduce noise and interference but that is just a guess. Anyone care to enlighten me?
Tips
Jocke
Jul 23, 2007, 01:58 AM
"I am thinking magnets of some sort that may reduce noise and interference"
Exactly!
KatManDEW
Jul 23, 2007, 07:09 AM
What are those circle rings around the servo wires.
Ferrite torroid rings, to reduce noise.
Jocke
Jul 23, 2007, 10:45 AM
KatManDEW, thank you for your input, thats the word i was unable to find!
becas of bad weather we havent had chance to fly with the new batterys.
Wingtips24
Jul 23, 2007, 12:47 PM
Thanks guys, by the way I only usually see these rings on larger models. Is there a reason that they tend to be used more often on bigger sized models. Also where might you find some of these rings for and what type of interference is it blocking?
Thanks
Tips
Jocke
Jul 23, 2007, 04:27 PM
I have been told to use the rings if you have servo extension cable over 1meter, it helps, sometimes alot from glitching interference.
Ed Lyerly
Jul 23, 2007, 04:38 PM
I also use one in the ESC to receiver lead .... as I understand it, this is a particularly noisy lead.
Ed
Jocke
Jul 23, 2007, 04:58 PM
I also use one in the ESC to receiver lead .... as I understand it, this is a particularly noisy lead.
Ed
Very tru, when i had interference with the Katana, biggest help was ferrite ring on the ESC and conecting the ESC to reciver tru the powerbox, not directly to reciver.
SD_Raptor
Jul 24, 2007, 10:40 AM
Thanks guys, by the way I only usually see these rings on larger models. Is there a reason that they tend to be used more often on bigger sized models. Also where might you find some of these rings for and what type of interference is it blocking?
Thanks
Tips
The reason that larger models often need ferrites is that the larger models have higher currents on the servo leads, have longer servo leads, and in the case of electric power have high currents in the power section.
Recall that flowing current creates a magnetic field. In turn, changing magnetic fields induce voltage in conductors that are within the field. As the size of the plane increases, more current is required to move the servos, particularly in the case of digital servos which can respond more quickly. So, the magnetic fields are larger in the big planes. Also, since the plane is larger, the servo leads are longer, providing more conductor to which the magnetic fields can couple to generate electrical voltage.
Servos respond by looking for a difference in input pulse width relative to the pulse width that correspondes to the servo's present position. Any induced noise signal on the servo leads may be interpreted by the servo to be a new position input, causing the servo to unexpectedly and unpredictably change position.
Ferrites help by increasing the inductance of the leads, which reduces the amount of voltage that can be generated by external magnetic fields. They also help by absorbing high frequency noise which may come from the ESC's switching.
Servos may draw an amp or two. But the ESC is pulling 10 to one hundred times more current, and tuning the current on and off rapidly as it switches phases and modulates the power on each phase.
Power distribution boxes help because their output drivers have lower impedance than the drivers on most receivers. A lower impedance driver improves reduces the response of the outputs to magnetically induced voltage. They also block voltages induced on one servo lead from coupling to the other servo leads through the common bus in the receiver.
Probably more than anyone wanted to know but it may help someone one day.
Wingtips24
Jul 24, 2007, 01:24 PM
Probably more than anyone wanted to know but it may help someone one day.
Not me that was absolutely awesome. Thank you. I look for info like that cause I like to understand the concept of how it works. Thanks to all of you for sharing, I understand it alot better now. SD thanks for the extra detail much appreciated bro!
Tips
Jocke
Jul 25, 2007, 04:33 PM
11kw testflight done! dont think i need to explain how powerfull this setup is ;)
the 3blade TH prop runns so much quieter than the normal gas prop, also better acceleration, more trust and faster trotteling, the prop also gives less torq movment and interference tru aerobatic...i like!
the EVO25 batterys hold voltage so much better, and as it seems i get better flight times now!? after flight of 9min aerobatic the temp was only 40c Celsius.
First time i felt it was of interest to check motor temp after flight... 9min 11kw flight and motors hottest spot (core) only 35c.
Also the SPIN200 worked good, no problem at all.
Katana= Ferrari F50 pulling vertical!!!
Ed Lyerly
Jul 25, 2007, 07:38 PM
Jocke,
Sounds GREAT ! Maybe you could post some video when you get a chance, so we can see and hear the difference :).
Keep up the good work, please.
Ed
Jocke
Jul 26, 2007, 12:44 AM
Thanks Ed, video will be made asap!
Jocke
Jul 27, 2007, 03:54 AM
After 9min 11kw flight i have now recharged the batterys, 5200mAh, after a few 7min flights i usaly recharge 4500mAh, these EVO 25 batterys are much more efficient than the old EVO 20, i have never gone ofer 40c temp after flight on batterys, same with the motor.
Jocke
Aug 01, 2007, 04:38 AM
Next step will be to try out a 2blade electric prop with simular load as the 3blade 27x12" TH, acording to Thomas Mejzliks calulations a 30x10 or 30x12" with TH profile will be good, first we will test the standard Mejzlik gas props at 30" size, after that Mejzlik can go ahead and make a electric 30", this can later come in to production, think it would fitt nicely on other large motors pehaps BAMs, Hacker AXXX, big Axis, Plettis, Actros, Cyclons and more, Mejzlik is also researching on what other prop sizes he will make as an electric version, now there are the new TH props from 24-27"and the normal electric props from 20-26".
Also a few pics from an electric event in sweden, nice but very windy ;)
Jocke
Aug 16, 2007, 05:46 AM
30x12" gas Mejzlik tested, 6300rpm on 11kw, very nice, i now have 10flights on the 11kw setup, giving me avarage flight time of 12min pulling hard, full power is only recomended for short time going vertical, after flight with outside temps around 23-28c the motor is 35-40c, battery 40-45c, controller 60-65c, new spinners will now be tested, with and witout extra cooling, i have also been doing alot of static tests on higher powerlevels.
gigawatt
Aug 16, 2007, 08:17 PM
Hey Jocke,
What would happen if you really pushed your plane
for the full 10 minutes or just even five minutes.... constantly doing close to the ground stuff,
hovers, harriers, just practicing....would it take it ?
Could you try it for five minutes , land and then take data?
Really cool setup, though!
Cheers,
Gigawatt
Jocke
Aug 17, 2007, 12:36 AM
Yes i could do that, i have pushed it hard static on ground, and will continue with tests in the air.
Jocke
Aug 17, 2007, 11:18 AM
Wanted to chare a few pics from some of the events.
Jocke
Aug 17, 2007, 11:31 AM
Fresh pics from HD.
KatManDEW
Aug 17, 2007, 09:38 PM
That motor looks pretty small Jocke. Does it weigh less than the big Hackers?
Jocke
Aug 18, 2007, 01:30 AM
Yes, only 1,5kg(3,3Ibs) the bigger 37 Predator is 1,9kg(4Ibs) with prop coupling.
LaxLife
Aug 25, 2007, 11:02 PM
Jocke,
I'm ready to install my big Jeti Spin 200 ESC. The instructions from Jeti are TERRIBLE! I have no idea what to do with the 5 wires (2 black, 3 red) coming out of the supply end of the ESC. Can you help?
I'm installing a Neu2215 geared motor to my TopFlite Giant Scale P-51 ARF. It will be powered by 12s, 9000 mAh comprised of two 6s, 9000 mAh ThunderPower Xtreme Lipos. Between the Lipos and the ESC I want to install a safety shunt which I can activate from the side of the fuselage just before flight. For wiring I plan on using 12 gauge silicone wiring with 6mm bullet connectors. I suppose I'll make a series of Y connectors that join the lipos in series and then connects to the safety shunt and then on to the ESC splitting off to the two negative leads and the three positive leads. Its all somewhat confusing and the Jeti documentation is very poor considering the small fortune paid for this ESC. I hope you can help me.
KatManDEW
Aug 26, 2007, 12:07 AM
I have a Jeti Spin 200 and a Neu 2215. There are two main positive leads, which are the two bigger red wires. And two negative leads. There are two of each to help share the current load. The smaller red wire is the anti-spark wire, which you connect before the main positive wires to prevent a spark when you connect the main positive wires.
I used two small pieces of circuit board to join the twin positive and negative wires, where they connect to the batteries. And to make the connection "panel mountable" in my battery tray. I pickup the the full voltage for the small anti-spark wire from one of the balance taps on the batteries.
LaxLife
Aug 26, 2007, 12:53 AM
Wow that was quick, thanks!
your solution is very clever but it raises a couple of more questions:
1) Your description is very clear from the ESC to the panel mount, would you describe the other half? From the panel mount to the lipos.
2) I don't follow how the small red anti spark wire connects to a balance tap. Did you fabricate a female balance tap connector? I don't really understand the anti-spark feature and I certainly don't know if its even safe (let alone effective) to connect it to just one of the three balance taps. Please help me on this if you would.
3) What size lipos are shown in the pic?
4) what size prop are you spinning? All up weight of your plane? RPM? max amp draw? What kind of flight times are you getting? How much mAh do you have to put back into the packs on recharge
5) those two deans connectors on the circuit board shown in the right hand picture, are they for the RX packs?
Thanks again for your help.
Jocke
Aug 26, 2007, 04:43 AM
I have solderd one 6mm bullet to the 2 + wires, same with negative, the antispark wire (thin red) dont need to be conected all the time, only a few sec on batterys + wire after that simply switch and install the big one.
I have 2 bullets on my + wires from the battery, one 4mm bullet/ for anti spark, and one 6mm for power, i have the anti spark installed tru the whole flight.
Yes, translation is poor, to bad in such fine controllers, Jeti is aware of this problem.
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