42% 122" 15kw Extra 260 conversion

[Jocke]

Latest project will be to electric convert a 42% scale Extra 260 with same goal as the Katana conversion, thanks for the sucsess and great result with the Katana and its powersystem i was asked to do the same, but now with a larger airframe and new 2,4Ghz radio. I will also continue to test and evaluate the Mejzlik electric props and spinners, also test a new Jeti SPIN300 controllers togheter with Flightpower Lipo and Plettenberg motor.

The model is light build, fuse on pic is only 2,5kg. Batterys will be 14s configuration, i will go down from 15s that i used in the Katana to 14s becas of EU rule/ recomendation. Radio is a new Futaba 12FG 2,4Ghz FASST with the R6014FS 12chanel reciver, i will start test the 2,4Ghz FASST system in smaler setups first and finaly fly it in this plane with HV/ power setup. Total of 12 Futaba 9156 servos will be used togheter with the Duralite SC-12 Powerbox and Flightpower reciver packs.

[ditchit]

Nice Jocke. Good luck with the project. Will watch with interest. Would like to do a 42% next year. Plettenburg motor prices out of my reach though. Maybe Hyperion Z60 or equivalent. 30% is my limit this year, a big step from the year before. Lead the way sir, lead the way...

[sun.flyer]

Jocke,

Looks like a great project. Who makes the 42% Extra 260 you are using? SD Models?

Tim

[Jocke]

Thank you guys, i apritiate it. Yes the model is as i belive an SD model Extra 260, Troy build models says 42%, so thats what im gonna do ;)

The new Hyperion motors for large scale looks promissing, i have used there motors up to Z4045 with very nice result.

[3Deranged]

Looks like fun Jocke! The new Scorpion 54XX series may be worth looking at too. They're supposed to be out in the spring. Promises 5kw+creamy 3D power! :D

[BoneDoc]

Is it done yet? :D.

[Jocke]

Sorry not done yet, i think this will take some time to put togheter ;) the motor is now somewhere in Sweden on its way to me, cant wait! Have started to use the FASST 2,4 in smaler parkflyers, love it!(where is the antenna?) nice uppgrade from my FF9 35mHz.

I havent tryed any of the Scorpion motors yet, migt just have to do that, they look interesting, past few monts i have been testing the Cyclon motors.

[Jocke]

Here are some better shots of the controller.

[DavidB.]

Which large hyperion motors are you speaking of Jocke?? I thought the 5045 was their largest motor?! Also, I'd love to see some test pics of that giant cyclon motor :) Tell us how it compares to the Plettenberg. I'm trying to figure out which motor is best... Hacker A200, Predator, or the Big Boss?!?!

[3Deranged]

I flew a Cyclon geared outrunner...didn't like the prop sizing on their larger outrunners(for 3D work) so I shied away from them. Seem to be a bit on the small side for 3D props. Didn't really dig the required gear lube maintenance about every 40 minutes of flight time :( Sorry not done yet, i think this will take some time to put togheter ;) the motor is now somewhere in Sweden on its way to me, cant wait! Have started to use the FASST 2,4 in smaler parkflyers, love it!(where is the antenna?) nice uppgrade from my FF9 35mHz.

I havent tryed any of the Scorpion motors yet, migt just have to do that, they look interesting, past few monts i have been testing the Cyclon motors.

[Jocke]

The Cyclons i have been testing is the Nano, Micro, P&F, Premium, Power, the latest motor will be the Power 55, these motors have incredible performance data thanks to the pole design and silver wind, the 55 have 0,014 Ohm, sofar im very impressed by all the Cyclons and the inovative design and peformance.

I had chanse to talk with Mr Fabrice at Nuremberg about the new BigBoss and his new Sigma controllers. Main diffrence with the BigBoss compared to other motors like the Predator 37 and A200 is the fact that its "only" for 12s Lipo max, becas of there safety policy so one needs to get the power from 300-400Amps instead, i wanted to run this plane and possebly other in 14s configuration so test of the Big Boss will have to wait. I think the BigBoss with controller will be avalible in 2-3monts for sale.

The BigBoss have been tested with 15kw contiuos 30min with only the prop for cooling, the fact that the 2,3kg motor can handle that and 20kw burst impresses me, and the 100mm diameter with 28pole design. Another fact to consider it is only ment to be runned by the new Sigma controller with new direct FET technology (se pic) and the A200 and Predator can be runned up to 15s Lipo with diffrent controllers like the new Schulze and Jeti SPIN. Main advantage for the Predator is the low weight (1,9kg) and nice self cooling design, also that one can run it with the folding prop system, the A200 i have limited knowlege of, i tryed to get information on it at Nuremberg without luck, i only know what is written about it in there catalog 2008, but im sure it will be a good performer as there A150, only downside i can see it the weight, but possebly thanks to that it handels heat in a good way and maby high burst power like the BigBoss.

The Hyperion motors for big scale seems promissing from what i have been reading from Davids posts, dont know how powerfull they will be, but they have some catching up to do considering Hacker And Plettenberg have a few motors now from the A80 up to A200, And Terminator and Predator 25 up to 37.

[kmp647]

here is a pic of the Z65 lineup
not the greatest pic
they will be 7500 to 15k watts I think

hyperion is making 250amp 15s controller too

[ditchit]

OMG! 30x10 carbon prop on that Z65 at the bottom of the pic. Wooooah. :eek:

Is that a custom lipo pack between the motors and the brochures? Must be huge capacity.

[Jocke]

The Hyperions have a nice look.

Some build being done today, the motorbox, landing gear, also some messurments, will now start servo installation for the stab. Will need to get tailwheel and system for the rudder servos, other than that everything is included.

[DavidB.]

I'm looking forward to test results for the Hyperion ZS65 series. Nippon Dave says early March for results :) It's funny that the Predator, and the A200 both use very similarly designed stator lamination with cooling holes. The BigBoss does not use this style, but instead has nice large ring bearings so the middle of the motor is hollow.

[Jocke]

The Predator 25 has a very cool stator design.

[Jocke]

Motor arrived today, i can see now that the Predator 37 also have a nice stator design ;)

[kmp647]

wow! nice winding design, very cool!

great airflow

[redflyboy122]

now that is a motor!! holy cow!

[DavidB.]

Jocke, that is awesome. I love the new cooling ridges on the inside of the stator. Not so sure about the angled supports..maybe for looks only? Also, do you know the pole count on this motor? It appears to be only 20, but I can't really tell from the pics. THANKS!!

[NumbSkull]

Now them's some big boy motors!!!

Cant wait to see how the 42% turns out!!

[Jocke]

As far as i know with my limited knowlege, this new stator design is thanks to there laser cutting tool, also i belive the motor is 20 pole as the smaler Predator 30 i used in the Katana, in terms of looks, the predator 37 scores 10/10 in my book ;) looking forward to mount it in the Extra.

[thelamecow]

now that is a motor!! holy cow!
yes?

but yeah...anyway that is one HUGE build...good luck + when you finnish, post a vid plz... Amazing....why not just build a full size...lol

[Jocke]

Thank you, ofcorse we will get movies of her in action later.

For the interested, here are some more detailed shots of the motor.

[DavidB.]

HAHA, we can never have enough pics!!! May I ask how much you spent on this motor? I can't find it for sale anywhere!?!

Edit: My mistake, it is for sale here http://www.icare-rc.com/plettenberg_pricelist.htm $1249

[Jocke]

Here are 2 shots for you David ;) one showing closeup of the stator, other to demonstrate the smal airgap between stator and magnets.

[Jocke]

Motormount- done
Place for ESC- done
CG sheck- done
Stab, servos- done
Messurments- done

[DaveKan]

The angled supports do increase the surface area, and along with
the ridges have a total surface area 30% more than old design.

I can't wait to hear some of Jocke's numbers. I also have one of
these motors. For now I only have Jeti Spin 200, and 102" QQ Yak.


Dave :)

[Jocke]

I was considering the QQ Yak at first... but after going tru many models.. we later decided to go for the Extra, it seems like this model is built for my setup, my old motormount fitts perfect with correct lenght to the crowl opening, also the SPIN300 have a nice place to rest on top of the box, now we only need to decide if the motor wires should go inside the motormount or not, also the exact battery configuration, im thinking of Flightpower EVO25 3700 as 14s3p 11100mAh and aprox weight of 4,35kg.

[NumbSkull]

14s3p 11100mAh


Insert Tim the tool man grunt here!!!!

[DavidB.]

Jocke, thanks for the pics. A lovely motor you have there, and I can't wait to see (and hear) your plane fly. These large motors (props) sound incredible.

[teamtestbot]

I'm looking forward to test results for the Hyperion ZS65 series. Nippon Dave says early March for results :) It's funny that the Predator, and the A200 both use very similarly designed stator lamination with cooling holes. The BigBoss does not use this style, but instead has nice large ring bearings so the middle of the motor is hollow.

Hi Dave,

Where can you find/buy large outrunners like these?

[DavidB.]

http://www.icare-rc.com/
http://www.aero-model.com/

I may also design my own large motor to compete with the above...but that is still up in the air. Only if I can make the motor MUCH less expensive, and or have better performance will the endeavor be worth it. I think there is a giant hole in the market when it comes to price...maybe I can remedy the situation.

www.arcaneinnovations.com

[DaveKan]

I was considering the QQ Yak at first... but after going tru many models.. we later decided to go for the Extra, it seems like this model is built for my setup, my old motormount fitts perfect with correct lenght to the crowl opening, also the SPIN300 have a nice place to rest on top of the box, now we only need to decide if the motor wires should go inside the motormount or not, also the exact battery configuration, im thinking of Flightpower EVO25 3700 as 14s3p 11100mAh and aprox weight of 4,35kg.

Hello Jocke

I was going to go with the 122" Yak, untill I found out the size of the box
it comes in. Get this 1 box 105"*37"*22", and hears the kicker, 140lbs.
The shipping can be very high on that.

With the 102" Yak, that 37/6 can make 27"+ 2 blade prop rip. The motor
weighs only 1960g, that is less than A-150.
Anyways can't wait for spring.

Dave :)

[Jocke]

Sounds like a good combination, QQ102 and the 37/6, you will have power as 200cc if you want.. hehe.

spring would be nice now.

[POl99]

look what these guy is doing with the predator :
http://www.razeebuss.com/machine.html

[DaveKan]

Does anybody no if the TH series prop will be made in sizes larger than
27x12

Thanks Dave :)

[Jocke]

Yes as far as i know Mejzlik will make electric TH props larger than 27".

[Jocke]

New homepage where you can read about this and other projets, large scale electric.

http://www.wattsup.se/

[Ron van Sommeren]

... Where can you find/buy large outrunners like these?www.cyclonbrushless.com
www.rs-e-motoren.de

Prettig ;) Ron van Sommeren
• int. electric fly-in (http://home.hetnet.nl/~ronvans/), Nijmegen, the Netherlands
• brushless motor building tips & tricks (http://www.rcgroups.com/forums/showthread.php?t=240993)
• diy brushless motor (http://www.yahoogroups.com/group/lrk-torquemax) discussion group
• Drive Calculator (http://www.yahoogroups.com/group/D-calc/) download & discussion group

[Ron van Sommeren]

@DavidB & POl99
Electric PPG discussion group:
www.yahoogroups.com/group/electricPPG (http://www.yahoogroups.com/group/electricPPG)

@POl99
www.modelbouwforum.nl (http://www.modelbouwforum.nl) or www.aeromodelisme.be/forum ??

Vriendelijke groeten ;) Ron

[Jocke]

Rudder installed and final setting for motor and ESC done, started with the wiring.


By some resone i cant upload pics anymore?!

[DaveKan]

I'm sure you will get that picture thing sorted out. It seems your project
is moving along quite fast.
What do you think of your new radio so far. I have older 10sx, and may
change to 10c, 12c very soon.
I have weighed all my parts so far and it looks like it will weigh 27.5 lbs.
with 14s 2p 10,000 mah, Thunder Power Extreme. This is with 8 servos,
and no power box. Some of the new 2.4 systems do not need power box.
what do you think. I will run 2 reciever batteries though, for redundancy.


Dave :)

[Jocke]

Wow sound to me that you will have a very light plane! almost same size and weight as the 36% Katana, that plane on 10-11kw setup is just crasy overpowered, even better performance than a 160cc boxer and less weight, the fact that you now are installing a 1900g 15kw motor in such light airframe will be %€#"... hehe you get my point ;)

One thing that always comes up with large scale planes is- servos, how many, where to put them and how powerfull they need to be... i have spend alot of time tru mail and phone tralking with pepole both pros, amatures, manufactorers about this and the answer is ALWAYS diffrent depending on who you ask.

A good thing about this powerbox is its matching funtions, up to 3 channel 12 servos can be matched, if i dident have the powerbox i would need 5 match boxes, 2 voltage regulators and 2 recivers i belive.

I have now used the T12FG 2,4Ghz in smaler planes up to 2kw with currents up to 135Amp, reciver close to the main battery and ESC, it have worked perfect so far, i have also been using the 6channel reciver and it has also worked very well, the 12FG is a perfect uppgrade from my 9c, also i notice faster and higher servo respons with the FASST.

[Jocke]

A few more things have been done with the Extra 260, both ESC and motor have now found there final places and the rudder hinges have been glued. The rudder is removeble making it much more easy for transportation saving 35cm of lenght. Wiring have been started in the fuse, total of 4x 1600mm wires goes back to the stabilizer and there servos from the Powerbox up front in the fuse, these heavy duty wires have been custom made by Tommy / 3F Hobbyservice, for other servo wiring we have used Futaba 1m and 30cm wires. Cooling inlet holes have been cut in the motorbox sides.

[NumbSkull]

Where can I find info on how to make a rudder removable? I have a few planes in the 30% size that would be much easier to transport if I could take the rudder off.

[Jocke]

Its only a piano wire that goes tru the hinges.

[DaveKan]

Wow sound to me that you will have a very light plane! almost same size and weight as the 36% Katana, that plane on 10-11kw setup is just crasy overpowered, even better performance than a 160cc boxer and less weight, the fact that you now are installing a 1900g 15kw motor in such light airframe will be %€#"... hehe you get my point ;)

One thing that always comes up with large scale planes is- servos, how many, where to put them and how powerfull they need to be... i have spend alot of time tru mail and phone tralking with pepole both pros, amatures, manufactorers about this and the answer is ALWAYS diffrent depending on who you ask.

A good thing about this powerbox is its matching funtions, up to 3 channel 12 servos can be matched, if i dident have the powerbox i would need 5 match boxes, 2 voltage regulators and 2 recivers i belive.

I have now used the T12FG 2,4Ghz in smaler planes up to 2kw with currents up to 135Amp, reciver close to the main battery and ESC, it have worked perfect so far, i have also been using the 6channel reciver and it has also worked very well, the 12FG is a perfect uppgrade from my 9c, also i notice faster and higher servo respons with the FASST.



Hello jocke
I will prop it for about 180 amps at first. The power will be just about right.
the motor will be very efficient between 180-220 amp range. At 300 amps
the motor is not at best efficiency, though still very good.
I think 29X12 Mejzlik will be lite load on this motor? depending on cell count. :
Also I forgot to add the weight of the extended motor mount.
I have also heard different schools of thought on power box. I may still
go that route.

Thanks Dave :)

[Jocke]

27x12" may be to little, but i will test the motor with diffrent 2 and 3blade Mejzliks and post results here.

[R/C_Addict]

Lookin' Great! I can't wait to see some video of this thing in action. :D

THAT MOTOR IS HUGE!

[Jocke]

Hi guys, few more things have been done, pics are better than words, so here goes a few pics from todays progress.

[DaveKan]

This is looking good. I like that spinner cone. With front mounted
prop it still would provide some flow threw.

Dave :)

[Jocke]

On the pic its a 4" spinner, later there will be a 5" Mejzlik spinner with same cooling design.

[Jocke]

Mejzlik have now relesed new smaler carbon spinners, ultra light with cooling holes, 3 and 3,2" fitting nicely on 2m planes, the 3" spinner is only 30g!


http://mejzlikmodellbau.inshop.cz/inshop/scripts/set.asp?Level=62

Later we might see larger spinners with cooling holes both 4 hole version and one center from Mejzlik, 4 and 5" to fitt nicely on motors like the Hacker A1xx, Predator and other large electric motors.

[Jocke]

I have started with one of the most important things when it comes to a conversion, decoration ;)

[DaveKan]

Looking good jocke. I wonder if anything black will spin soon.


dave :)

[Jocke]

Hopefully within a week or so.

[Jocke]

Servo tray for the rudder arrived, will try and start instalation on sunday.

[DaveKan]

Hello jocke

I think you can get buy with 2, at most 3, 9156 servos, at 6 volts.

Dave :)

[Jocke]

Yes i will only use 2 or 3 servos for the rudder.

[Jocke]

Abit more progress today, crowl mount, canopy mount, pics in garden ;) servo tray and powerbox mount, more decoration.

[Jeffery]

Here you are in Sweden and your garden grass is already green. Everything is still brown here, but signs of stuff turning green in a short while.

[Jocke]

Well.... the climate isent like it use to be in sweden, green grass in march!? but actually, my garden is now full of snow and -1 degree celsius, but weather forecast says by weekend we will have sun and +15 again... all i can say this is not normal, despite i hate snow and cold weather ;)

[Jocke]

New 5" Mejzlik spinner arrived, also new "turbo" spinners for smaler planes.

[Jocke]

Some pics from the programing stage.

[Jocke]

Modifying the 5" spinner for the Predator, for the 5" spinner i made 5 elipse holes instead of 4 i have in the 4" spinners, both better looks and better cooling, Östersunds modellhobby supplyed me with a carbon tailgear that i will install this week.

[Dogzilla]

Oh my god. That is CRAZY. I dont even want to think how much the lipos are gonna cost for that thing!

[Jocke]

Forgott pic of the tailgear ;)

[Jocke]

5" fitts perfect!

[NumbSkull]

BLING!!!

Looking Good!!

[Jocke]

Batterys arrived :)

[3Deranged]

You go boyyy! Nice work on the spinner. Gotta love carbon. Really bad azz setup, really like to see some video :cool:

[DaveKan]

This is great news Jocke. I can't wait for some 2 blade data.

Dave :)

[Jocke]

There will be both video and prop data 2 and 3 blade ;)

[jason H]

Hi Jocke, love your new project and can't wait for the video...

I just have afew questions for you if thats ok?

- With the above pictured battery pack what would you expect you flight time to be?
-The 3 bladed props that you are running are for gass engines right? How do you find them on electrics?

The reason for my second question is i'm building and Ultimate Bipe with an A-60 Hacker in it. The recomended prop size is 20", this only gives me ground clearance of around 1" and i'm worried that the prop will hit the ground on take-off. So I want to go with a 3 blade prop but can't find any for E power.....

[mexico]

How about these
http://www.xoarintl.com/props/ma/PJI.html

I am using their 20" two blade. They run quiet and are light. But don't survive a strike. The tips are fragile.

[jfetter]

Hi Jocke, love your new project and can't wait for the video...

I just have afew questions for you if thats ok?

- With the above pictured battery pack what would you expect you flight time to be?
-The 3 bladed props that you are running are for gass engines right? How do you find them on electrics?

The reason for my second question is i'm building and Ultimate Bipe with an A-60 Hacker in it. The recomended prop size is 20", this only gives me ground clearance of around 1" and i'm worried that the prop will hit the ground on take-off. So I want to go with a 3 blade prop but can't find any for E power.....

Actually this brings up a good question. Just what differentiates an "electric" prop anymore? In the old days our motors were small and we typically had smaller prop shafts that needed a thinner prop hub. Given today our prop shafts are as big or bigger than gas/glow and long enough for full-thickness, just what exactly is the compelling reason to still go with electric props on larger projects? I currently use a Mejzlik 20 x 12 E prop and the hub is huge (thickness), plenty of room around it to ream it out to 12mm for my Axi 5330/F3A without getting too near the blades, seems these e-props aren't much different than non-electric once you pass a certain size...

Jack

[NumbSkull]

I think there are two main differences. While the large E props do have large hubs, I think they are thinner (front to rear) then gas props. Also, from what I've seen the blades are little thinner. Since they don't have to handle the pulsing power of a piston, the prop doesn't take as much of a beating.

Also, I think the blades are shapped to utilize a different RPM range then the gas props.

I could be wrong....

[jfetter]

I think there are two main differences. While the large E props do have large hubs, I think they are thinner (front to rear) then gas props. Also, from what I've seen the blades are little thinner. Since they don't have to handle the pulsing power of a piston, the prop doesn't take as much of a beating.

Also, I think the blades are shapped to utilize a different RPM range then the gas props.

I could be wrong....

Your probably right but what's the "real-world" difference? I guess my point is, if I can't get the size I want in an e-prop, do I only lose maybe 5% - 10% efficiency if I go to a regular prop that fits my needs size-wise?

Jack

[Jocke]

Having the ability to test alot of the diffrent Mejzlik props, i can say that the normal Mejzlik gas props works very well on electric motors, but the Mejzlik electric and TH props works always better, giving more trust to same or lower power/ rpm, they are also lighter and often less noisy. The main diffrens when comparing a normal Mejzlik prop to a TH, the prop is lighter, blades thinner with a diffrent profile, Mejzlik have continued to develope the TH props for large scale electric motors where the aim is more trust to less noise, our latest tests showed that on same setup in differed 92db to 103db on same prop size 26x10", only a smal diffrens in the blade profile, the props looks the same, one have to look close to see any diffrens.

When i have tested and found a sweet spot for the setup and motor with prop, perhaps a TH prop could be made 2 or 3 blade.

Regarding flight time, my rough guess is average 10min !? i will have 2 setts of batterys, comes in handy when practising.

[edible_engine]

oh come on Jocke! you not finished this yet :D


Ian

[Jocke]

Sorry Ian, not just yet, as you know is these final detales that takes time, and a pain to do, but i have now put the plane togheter installing the battery to find the CG... just a few cm infront of the wing tube... perfect! the size and weight of the battery is spot on!

[edible_engine]

good stuff matey.

I agree, those final little jobs are so annoying, got all the ones for my Kat to do :(

[DaveKan]

I have Futaba S9156 servos, that will get metal arms. They are from Hangar 9. The spline is very tight. Is that normal for a metal arm.
I know that jocke has these servos.

Thanks Dave :)

[Jocke]

For the rudder and servo tray i got the alu airwild servo arms... they are tight, to tight i think, so instead i will use GFK arm extensions for the stock Futaba servo arms.

[DaveKan]

I'm running 6 futaba S9156 servos, and one Jr. DS 8711 servo for the rudder.
On that jr. I have SWB MFG. arm and it is still stiff on Jr. servo, but not too
much.
I will order new SWB arms for the Futaba servos.

Dave :)

[edible_engine]

no problem with them being tight, they often are. just push them as far down and then screw them up tight to fully push them down, once they are used once its a lot easier

[Jocke]

Yes normaly on could do that, but these are realy tight so i havent dared try to fitt them completley, i dont want to hurt my Futåbä servos ;)

[DaveKan]

Yes normaly on could do that, but these are realy tight so i havent dared try to fitt them completley, i dont want to hurt my Futåbä servos ;)

I agree with you on that.

Are you going to do some low powered tests soon.
I have bought Mejzlik 27x10TH, 27X12TH,28x10,28x12,29x10,29x12, and
the 29x12 does not have the S, ie 29x12S.
I do know that 37/6 motor is faster under load than 30/8. I only have
spin 200 now and must be cautious to not over load my controler.
I may get the new 40.300 Schultze if it comes out soon.

Dave :)

[Jocke]

Motor tests will be ASAP! i now have the batterys and everything needed.

[Jocke]

The plane is 99% complete and first motortests done along with range check of the Futaba FASST, i cant belive how smooth everything went, almost every time on setups over 3kw 10s there has been glitch/interference problems on the 35mHz band(testing on diffrent brand TX and RX) ending up with alot of hard time consuming work to get it work OK, 300+A load with range check to above maximum recomended needed and the FASST is ROCK solid!!! yes! this is what i hoped for when chosing FASST 2,4 for this plane and power level. 300A+ and no trubbel starting or accelerating the motor, the SPIN300 runns perfect, highest recorded temp after 3 prop tests and 6000mAh the controller was 37c and the motor about the same, dident bother to take batt temp, it was colder that the outside temp of 18c.

Some data, 8kHz 22degree timing:
Mejzlik 27x12"TH 3blade
282A
6600rpm
13,85kw

Mejzlik 29x12" 2blade
294A
6550rpm
14,4kw

Mejzlik 29x12"N 3 blade
303A
6120rpm
14,5kw

A few sycles on the packs and 15kw on 29x12N should be no problem.

[freddy warbird]

300amps? Jocke, your an animal. The SD extra is massive, were talking 122" @ 2666 sq in/ft and you went electric? WOW. Got the same model with a DA 150 swinging a 30 X 12 Xoar. Can't wait to see a vid. Good job.

[freddy warbird]

By the way, nice job on the spinner.

[Jocke]

Thank you ;)

I have an 30x12 Mejzlik i will try later also a 29x12" 3blade with normal blades that should load abit more, but first i want to get a few sycles on these packs.

[DaveKan]

This is great news, that you are spining props already. can you try some
smaller props as you breake in your batteries. Like 28x12 two blade.
I think I may need bigger controler.

Dave :)

[Jocke]

Yes i would have runned it with a 28x12", but unfortunetly i suspect it has been stolen from me on an event last year :(

But i have 26x10TH and 26x15E i could try also.

Btw if anyone is interested in the cooling spinners just contact me.

[DaveKan]

Cool, too bad someone stole your prop, most likely not a modler, just a
spectator.

Dave :)

[freddy warbird]

Thank you ;)

I have an 30x12 Mejzlik i will try later also a 29x12" 3blade with normal blades that should load abit more, but first i want to get a few sycles on these packs. I should have tried a 29" three blade. I recieved suggestions to go for a 28 x 12, but unfortunately, I didn't find the 28" to perform all that great in vertical climbs with a DA, but maybe you'll have better luck being electric, and most likey lighter. My model is 44.5lbs full of fuel (No smoke system installed). The 30 x 12 two blade made a world of difference with my set up. Sense props are expensive in this size model, I'm sticking with the Xoar for now. Here's a pic of my 260 with the three blade. Its certainly prettier than with the Xoar. ;)

[mexico]

unfortunately, I didn't find the 28" to perform all that great in vertical climbs with a DA, but maybe you'll have better luck being electric, and most likely lighter. My model is 44.5lbs full of fuel

I would think an electric conversion would come out heavier than a fuel setup. Isn't that the case with most conversions?

[Jocke]

What rpm are you getting with that DA150?

Rely nice looking prop-plane-spinner combo!


Usually today comparing power/ weight to gas the electric is lighter, latest conversions there have always been trubbel with CG becas of light motor and battery, ending up putting bigger batterys to get it ok.