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Habu with Little screamers JS 1400 motor. Help.

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Habu with Little screamers JS 1400 motor. Help.

Old 07-14-2010, 03:37 PM
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c_makhija
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Default Habu with Little screamers JS 1400 motor. Help.

Hi guys,

Relatively new to EDFs, bought myself a PZ Habu and had around 10 flight on it before she had a midair with another airplane and totaled the airframe. The Habu flew great on 4s stock setup but lacked vertical performance. Now since we can buy the airframe only i would like to upgrade the power system to get better verticals.
I was thinking of buying the little screamers JS1400 motor with a Velocity Mark 2 fan or the HET fan with a 4S 4000 MAH pack and a 100 AMP ESC.
Any of you guys who have used this or similar setup could you comment on the performance of the JS1400. Which is a better fan between the Velocity and the HET. Would also appreciateif you guys could suggest a good ESC for this setup. Would like to keep the airframe on 4s and not move to a 5s setup.

Thanks
Chaitanya.
Old 07-14-2010, 05:54 PM
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Default RE: Habu with Little screamers JS 1400 motor. Help.

The Wemotec Minifan PRO is a better fan than the velocity if you look at the numbers. Velocity just posted up new video of the WM400, itpulls 108 amps on 6sto get 2.5kg thrust with an efflux of 354kmh. I have tested the Wemo with ARC motor and pulled only87 amps to get the same 2.5kg thrust with an efflux of 360kmh!

[youtube]http://www.youtube.com/watch?v=ETAQ80LdD3c[/youtube]

The HET fan is a little more aggressive in pitch compared to the Wemotec fan, between the two you can create whatever combo you like just by choosing different motors.
Old 07-14-2010, 08:12 PM
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john491
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Default RE: Habu with Little screamers JS 1400 motor. Help.

Do the JS1400 and the WM400. In the five combo's I'm testing now that one feels the best. 1450 watts on 4s in my Squall dopplered 115.
Old 07-14-2010, 09:03 PM
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Default RE: Habu with Little screamers JS 1400 motor. Help.

I know the squall is a draggy airframe but the Phase 3 F16 will do 125 on just a 2W20 and HET fan, 750 watts. For me its all about the best efficiency for the output made, I dont make the fans, I just use the best combos I can find or create. If you look at the figures of their current video the WM400 is more amp hungry than a wemotec and no faster in efflux.

[youtube]http://www.youtube.com/watch?v=WvVWQ5UNrCg[/youtube]
Old 07-15-2010, 01:36 AM
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Default RE: Habu with Little screamers JS 1400 motor. Help.

Great info.

Thought that the wm 400 was a better option than the midi fan.

juan
Old 07-15-2010, 02:49 AM
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Default RE: Habu with Little screamers JS 1400 motor. Help.

Yeah I think its more the hype talk around the forums and marketing than actual data and test results. I noticed velocity removed their videos on vimeo about the time I was showing the wemo setup on the other forum, their original specs showed 345kmh efflux, now its up to 354 The Midi is an awesome fan, and with an alloy housing its magic, you cannot even hear a perfectly balanced one in a composite airframe, the test model we are running at the moment is incredibly quiet, just a hi pitched whistle and the exhaust noise. I will have to get the video edited and post it up soon as I find some time.
Old 07-15-2010, 06:35 AM
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c_makhija
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Default RE: Habu with Little screamers JS 1400 motor. Help.

Thanks Guys,

John will the JS 1400 fit into the WM400 without any problem or do we have to do some mods to make it fit. What ESC are you using with this setup.

Thanks
Chaitanya.

ORIGINAL: john491

Do the JS1400 and the WM400. In the five combo's I'm testing now that one feels the best. 1450 watts on 4s in my Squall dopplered 115.
Old 07-15-2010, 06:50 AM
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c_makhija
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Default RE: Habu with Little screamers JS 1400 motor. Help.

Do you think the WEMO fan is a better option with the ARC than the JS1400 and WM400. If so which ARC motor would be the correct one for the Wemo fan on a 4S setup and could you suggest a good ESC to go with it.

Thanks
Chaitanya.

ORIGINAL: Extreme_RC

Yeah I think its more the hype talk around the forums and marketing than actual data and test results. I noticed velocity removed their videos on vimeo about the time I was showing the wemo setup on the other forum, their original specs showed 345kmh efflux, now its up to 354 The Midi is an awesome fan, and with an alloy housing its magic, you cannot even hear a perfectly balanced one in a composite airframe, the test model we are running at the moment is incredibly quiet, just a hi pitched whistle and the exhaust noise. I will have to get the video edited and post it up soon as I find some time.
Old 07-15-2010, 10:53 AM
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Default RE: Habu with Little screamers JS 1400 motor. Help.

(in response to WM400/JS1400 mods to fit? question)

I had to modify both the JS1400 motor shaft and the WM400 rotor adapter for correct fit...

1) run motor on stand without rotor, if it vibrates, balance motor
2) rotor adapter does not seat properly/completely on the shaft ...
a) motor mod: the 3.175mm turned part of shaft is not long enough, turn 4mm shaft down an 2 addl mm down to 3.175mm
b) rotor adapter mod: remove 2 mm from bored end of rotor adapter
work with the motor shaft - rotor adapter for best bit and minimum runout - U should be able get it spot on.
3) while on test stand, attach rotor and test & rotate rotor for best balance, then fine balance rotor with elec tape inside rotor hub
mark the shaft, adapter, and rotor so you don't lose your precision balanced orientations.
4) mount adapter onto motor permanent (flat spot for set screws on shaft, red threadlocker), then bore out/enlarge center hole in housing so rotor adapter will fit thru =>(don't try to "properly" fit/attach/balance, etc, rotor adapter to motor shaft with motor mounted in housing - not possible - believe me ...)
5) final assemble the motor & rotor in housing, repeat fine balance in step 3 if necessary.
after final orientaion of rotor on adapter is found, glue the rotor onto the adapter with a thin layer of medium CA and "kick" it - avoid spraying kicker into motor or on plastic - wipe off excess kicker quickly.

The WM400/JS1400 combo is really 'kick ass' - the amp draw can be beyond 70A
You need at least an 80amp ESC (placed in the intake airstream, or outside the airframe),
and about a 4000mah 30C LiPo!
Old 07-15-2010, 03:35 PM
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john491
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Default RE: Habu with Little screamers JS 1400 motor. Help.

I'm using 80 and 100 amp esc's depending on if it's in the airstream or tucked inside the fuse. I have three minifan pro's each with a different motor. An Arc 28-47-1 in the mini pulls close to 80A. JS1400 in the mini around 90A. Mega 22/16/1.5r around 70A. Wm400 with JS1400 around 85A. Three are in Spears so that the airframe is not a factor in how fast. The wm400 is in a Squall. The JS1400's are putting out the most speed at the moment and I have yet to do the Neu motor for comparison. At the moment the WM400 JS1400 is putting out the best.
I didn't have to do any mods to the fan or the MKII rotor or prop adapter. You have to lube up the O ring on the JS1400 to get it in the motor tube but it will go with no mods, at least mine did.
Old 07-16-2010, 03:30 AM
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c_makhija
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Default RE: Habu with Little screamers JS 1400 motor. Help.

Thanks Hobbyaire and John for the tips, I will go with the JS1400 and WM400 combo since all of you are praising the combo. John could you tell me which make of 100 Amp ESC you are using, i would like to buy the same since you are using it successfully with this combo.

Chaitanya.
Old 07-16-2010, 03:43 AM
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c_makhija
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Default RE: Habu with Little screamers JS 1400 motor. Help.

Another question guys, i am about to order the WM400 fan, does everything come with the fan to adapt it to the JS1400 or do i need to buy addition items like prop adaptors ect so the JS 1400 can be fitted on to the fan.

Thanks
Chaitanya.
Old 07-16-2010, 03:59 PM
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john491
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Default RE: Habu with Little screamers JS 1400 motor. Help.

I'm using a 200 amp controller from HiModels (http://www.himodel.com/electric/HiMo...-200A-BEC.html) in one of my setups. I've got a Motrofly 80 amp in one, a Motrofly 120 amp in another, a cc Ice lite 100 in another.
You are going to pull right at 85 amps on 4s so a lot depends on where you put it. I like the Hi models one because it will do 8s for when I need it in another plane and I have a lot of headroom with it- and it's $52. The CC ice lite is amaller but costs more.
John
Old 07-18-2010, 07:37 AM
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c_makhija
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Default RE: Habu with Little screamers JS 1400 motor. Help.

Hi John,

Thanks for the advice, would there be a lot of difference in quality between the ice 100 and the trunigy 100 amp esc. I have to decide which one to buy now. Do i need to buy anything extra from velocity r/c to fit the JS1400 on to the fan.

Chaitanya.
Old 07-18-2010, 02:29 PM
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Default RE: Habu with Little screamers JS 1400 motor. Help.

Nothing add'l. Just take time and patience assembling - so all is seated, centered and balanced well.
Old 07-18-2010, 04:42 PM
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Default RE: Habu with Little screamers JS 1400 motor. Help.

I have had terrible luck with the Turnigy esc's. I have burned up no less than six of them. I don't think I'll be tempted again as I could have bought CC's and still had them, just half as many but I'd still have them. I have also had decent luck with the esc's from HiModel, only burned up one of those, still have three left. All my Motrofly esc's are still going too. I have six of these I abuse every weekend.
In my opinion the Motrofly or the CC esc's will be your best bet.
John
Old 07-18-2010, 10:11 PM
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hobbyaire
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Default RE: Habu with Little screamers JS 1400 motor. Help.

Castle Phoenix 80 (original Phoenix), set on low timing, insensitive, soft cutoff, brake off - has performed flawlessly. Just locate either outside the air frame, or in the intake airstream - it does not have heatsink.
Old 07-19-2010, 02:50 AM
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c_makhija
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Default RE: Habu with Little screamers JS 1400 motor. Help.

How about the ice 100?

Chaitanya.
Old 07-26-2010, 12:25 AM
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Default RE: Habu with Little screamers JS 1400 motor. Help.

ORIGINAL: c_makhija
Do you think the WEMO fan is a better option with the ARC than the JS1400 and WM400. If so which ARC motor would be the correct one for the Wemo fan on a 4S setup and could you suggest a good ESC to go with it.
Thanks
Chaitanya.
Sorry I didnt see your question. Yes for sure the Wemo is a better option, it sounds better and performs better in the tests. You can use the ARC2847-1 if you want a hot 4 cell setup, this is a popular setup with the US guys in the "other" forum, you can find a lot of info on it. Another option is the HET 1W30, its a hot 4 cell motor and pulls around 90A in the wemo fan on 4 cells.

If you read the RC-Flyer magazine motor shootout it shows the js1400, arc, hoffman, and medusa. The ARC came out the best, lowest amps for the best rpm. If you cannot find the article online send me an email through the website, www.extremerc.com.au
Old 07-28-2010, 07:58 AM
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Default RE: Habu with Little screamers JS 1400 motor. Help.

Great thread here-In my Habu, I'm running the JS1400 in a Wemo mini and a Castle HV85 ESC, on 4S. Should I look into changing the default esc timing to low for this combo? Thanks for any help...
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Old 06-24-2011, 07:09 AM
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hobbyaire
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Default RE: Habu with Little screamers JS 1400 motor. Help.

JetScreamers JS1400 with the Wemo MF480 is a very good setup. I'm using a HobbyWing Pentium 80 ESC & Turnigy Nano-Tech 4000 4S 50-90C LiPo battery. The setup is 85A,1200 Watts on a fresh battery. Has unlimted vertical, and will run "full" throttle for 3 minutes (more flight time with throttle mgmt).
Locate the ESC in front of the fan. You'll have remove some foam where the ducts join.
D
Old 06-24-2011, 08:23 AM
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Default RE: Habu with Little screamers JS 1400 motor. Help.

BTW, who carries the JS1400 now? Can't seem to find it at Hobby Lobby anymore.
Old 06-24-2011, 12:52 PM
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Default RE: Habu with Little screamers JS 1400 motor. Help.

The JS 1400 is available from the "maker"
http://www.littlescreamers.com/
Old 06-24-2011, 11:59 PM
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Default RE: Habu with Little screamers JS 1400 motor. Help.

LS is dead and buried, Scott owes so much money to so many people he has gone into hiding. Look at the website, no contact info, no phone number, he only takes money orders now, I mean c'mon!

End of the day it all comes back to figures and physics. The best combo is the one that pulls the least amps for the most performance, and thats NOT the JS1400 nor the wm400. Just read the shootout that Carl Rich did, it shows clearly the Medusa and ARC inrunners are much more efficient, look at how long Hoffmans heaters lasted, all of 6 months? before they went bust.

I dont make motors, I DO fly jets though, and have been for years, I will use what I see producing the best performance, and right now in 70mm thats the Minifan PRO and a high quality inrunner motor, whether it be ARC, HET, NUE or Mega.
Old 06-25-2011, 12:33 AM
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Default RE: Habu with Little screamers JS 1400 motor. Help.

Yea, that's kinda what I thought. I had a few bad LS JS motors eat themselves by grinding off he rear windings and switched to Don's alternatives.

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