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Old Apr 22, 2012, 10:04 AM
chuck
santa barbara, CA
Joined May 2009
4,126 Posts
Quote:
Originally Posted by D.B. Hooper View Post
Thanks for that info! I'm thinking of sticking with the 2W-20 Like you said to keep the weight down and make it easyer to launch. I do own a Jetapult bungee launcher.
my guess is u wont see 130 w/ that setup. at~ 800 watts the tractor version may get there but not the edf. could be wrong but thats a 100-110 mph deal in other similar jets. fwiw. 130 is in the big power league.

what say u 901?

chuck.
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Old Apr 22, 2012, 10:07 AM
chuck
santa barbara, CA
Joined May 2009
4,126 Posts
Quote:
Originally Posted by SMCLEODVT View Post
i hand launch mine with a 3300mah - but its the prop jet and has more torque. just set your neutral flaperons at 4-5mm up to be safe - its a little high but helps when tossing - but the crappy part is that high speed passed you have to hold down elevator to keep at level -
up? thats spoilerons ? for launching?
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Old Apr 22, 2012, 10:10 AM
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United States, VA, Roanoke
Joined Nov 2009
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when using a flying wing you gotta set neutral as up a little - and yes - i meant spoilerons - sorry
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Old Apr 22, 2012, 10:44 AM
chuck
santa barbara, CA
Joined May 2009
4,126 Posts
got it now, u mean reflex.
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Old Apr 22, 2012, 12:10 PM
Flirtin With Disaster !!
D.B. Hooper's Avatar
United States, OR, Mt Angel
Joined Jan 2008
1,432 Posts
Quote:
Originally Posted by chas650r View Post
my guess is u wont see 130 w/ that setup. at~ 800 watts the tractor version may get there but not the edf. could be wrong but thats a 100-110 mph deal in other similar jets. fwiw. 130 is in the big power league.

what say u 901?

chuck.
How about a Storm EDF unit with the beast?
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Old Apr 22, 2012, 01:46 PM
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United States, CA, Lancaster
Joined Jan 2009
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Quote:
Originally Posted by chas650r View Post
so hand launch is ok w/ the 4000? i will most likely bungee but not until its sorted out.
have u used the 2w20 and 6904 on more than 4's? seems like a smoke test to me , pretty high kv for 6's

chuck
My ME163 weighs 1700 grams and has retracts so I use a runway to take off. Have not tried the 2w20 on six cells. If the motor can take this what about the fan?
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Old Apr 22, 2012, 02:21 PM
chuck
santa barbara, CA
Joined May 2009
4,126 Posts
the 6904 is very robust , good into the 1+ kw area no problem. the 2w20 is not, imo.
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Old Apr 22, 2012, 03:38 PM
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Joined Jan 2006
2,390 Posts
Maiden! Launch was hairy. The bungee snagged near the end of its pull and it went off at an extreme angle. Fortunately it survived that part then went on to a very good maiden. Good speed, Very stable. Thought it might be squirly but it wasn't. And as I left it all red, thought it also would be hard to tell up from down but that wasn't hard either so..happy!

HET 2W-20, 6904, 4000ma 4s


cheers,
Mike
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Old Apr 22, 2012, 05:12 PM
chuck
santa barbara, CA
Joined May 2009
4,126 Posts
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Originally Posted by stanordave View Post
Maiden! Launch was hairy. The bungee snagged near the end of its pull and it went off at an extreme angle. Fortunately it survived that part then went on to a very good maiden. Good speed, Very stable. Thought it might be squirly but it wasn't. And as I left it all red, thought it also would be hard to tell up from down but that wasn't hard either so..happy!

HET 2W-20, 6904, 4000ma 4s


cheers,
Mike
good to hear!! so can u guess at top speed?

chuck.
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Old Apr 22, 2012, 06:06 PM
Extreme CNC Alloy EDF
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Australia
Joined Mar 2006
11,542 Posts
Problem with the WM400 setup is its power hungry, 108A to get 2.5kg thrust on 6s in their videos, the wemotec with ARC2858-1 pulled 87A to do the exact same sustained thrust, and the ARC will do it continuous, the Velocity motor is rated at burst only.

If you want huge 6s power then the new HET 1W40 in a wemo rotor'd fan is the way to go, it pulls 96A on 6s for just over 2000w, and is spinning the fan 5000rpm faster than the ARC setup!!! I havent had time to bolt one to the thrust stand but 2.8-2.9kg would be the result I think based on the rpm.

The Hoffmann are good heaters, pull lots of amps and dont outperform any of the quality inrunners.

The 2W20 wont run on 6s, not 5s, not in the 6904, this fan is too pitchy. In the wemotec fan the 2W20 will run on 5s but you have to be careful of WOT and limit your use of it.

Best setup for a balance of power and weight on 4s is the one I installed into Munce's Komet, Minifan PRO and 2W18 motor, 800w on 4s3300 packs, 1.5kg thrust and 125mph measured speed in level flight. It weighs 1.2kg and is an easy hand launch.
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Old Apr 22, 2012, 09:23 PM
Flirtin With Disaster !!
D.B. Hooper's Avatar
United States, OR, Mt Angel
Joined Jan 2008
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Quote:
Originally Posted by Extreme_RC View Post
Problem with the WM400 setup is its power hungry, 108A to get 2.5kg thrust on 6s in their videos, the wemotec with ARC2858-1 pulled 87A to do the exact same sustained thrust, and the ARC will do it continuous, the Velocity motor is rated at burst only.

If you want huge 6s power then the new HET 1W40 in a wemo rotor'd fan is the way to go, it pulls 96A on 6s for just over 2000w, and is spinning the fan 5000rpm faster than the ARC setup!!! I havent had time to bolt one to the thrust stand but 2.8-2.9kg would be the result I think based on the rpm.

The Hoffmann are good heaters, pull lots of amps and dont outperform any of the quality inrunners.

The 2W20 wont run on 6s, not 5s, not in the 6904, this fan is too pitchy. In the wemotec fan the 2W20 will run on 5s but you have to be careful of WOT and limit your use of it.

Best setup for a balance of power and weight on 4s is the one I installed into Munce's Komet, Minifan PRO and 2W18 motor, 800w on 4s3300 packs, 1.5kg thrust and 125mph measured speed in level flight. It weighs 1.2kg and is an easy hand launch.
Was going to order the HET 1W-40 combo from you but just realized your in AU.
How much is shipping to the usa on something like this and how long?

Thanks D.B.
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Old Apr 23, 2012, 02:18 AM
Extreme CNC Alloy EDF
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Australia
Joined Mar 2006
11,542 Posts
Shipping is real good these days to US, $27.00 gets you registered airmail up to 500 grams, can send fan and motor no problem in that, likely other small bits too. Aust Post says around 10 days but guys have been reporting 7 days on average.
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Old Apr 24, 2012, 10:53 PM
Flirtin With Disaster !!
D.B. Hooper's Avatar
United States, OR, Mt Angel
Joined Jan 2008
1,432 Posts
Quote:
Originally Posted by Extreme_RC View Post
Shipping is real good these days to US, $27.00 gets you registered airmail up to 500 grams, can send fan and motor no problem in that, likely other small bits too. Aust Post says around 10 days but guys have been reporting 7 days on average.

If I can't find one here in the states I'll be getting one from you. Thanks for all the info.
D.B.
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Old Apr 25, 2012, 10:18 AM
Registered User
Canada
Joined Nov 2000
6,983 Posts
Dunno kids..that thing with a hole in the middle just looks.. Wrong.. to me.
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Old Apr 25, 2012, 12:24 PM
chuck
santa barbara, CA
Joined May 2009
4,126 Posts
funny , i was thinking just the opposite for me its about the noise factor , i know i can make a well balanced edf less obnoxious than the tractor model i have nib. any body want to trade?
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