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Old Nov 14, 2012, 09:43 AM
2 metre rule applies!
DRAMJET's Avatar
BOOGI, Australia
Joined Dec 2008
1,235 Posts
Typical Screamer comment....
H@#y Crap!
Nice contrails too.
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Old Nov 14, 2012, 10:04 AM
chuck
santa barbara, CA
Joined May 2009
4,135 Posts
alright , what battery do u have crammed in there? and have u checked the current?
have u flown it on 3's? is it noticeably faster on 4's?
i have the same setup on 3's and its over 30 amps, IF the battery can keep up it has to be close to 50amps. mine , w/ thinned trailing edges on all surfaces, mine is over 100 mph , but i dont see them going much faster because of wing thickness.could be wrong though

chuck.
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Old Nov 14, 2012, 10:13 AM
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gooniac33's Avatar
Sunnyvale
Joined Feb 2009
5,029 Posts
Quote:
Originally Posted by DRAMJET View Post
Typical Screamer comment....
H@#y Crap!
Nice contrails too.
It was a gorgeous day!! So spoiled to be able to live and fly here.... We were buzzed by F/A-18C's, a couple Super Hornets and an Alpha Jet too....
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Old Nov 14, 2012, 11:20 AM
ICrashRCs
United States, TN, Memphis
Joined Jun 2011
1,196 Posts
Finally maidened my pnp Screamer last week.
Great flying little plane. Lots of fun.
On 2nd batt got to the edge of eyesight and mixed with a touch of sun, crashed pretty hard.
2 major body cracks but should be repairable.
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Old Nov 14, 2012, 11:52 AM
Augermeister
dahawk47's Avatar
United States, TX, Keller
Joined Jul 2011
2,670 Posts
Wow, if that doesn't make for a tight sphincter, I don't know what does. That was easily 110+ Way to go !
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Old Nov 14, 2012, 12:07 PM
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MRGTX's Avatar
United States, CT
Joined Aug 2005
1,938 Posts
Quote:
Originally Posted by gooniac33 View Post
What an awesome day to fly yesterday!! It was 68 degrees and next to no wind! Got to fly the fleet of 50mm's and ran into Micromantis while I was out there. He had his new Screamer out there with Don's Wicked Wemo 6000kv set up ON 4S!!!!!!! Words can't describe how well this thing flies and how insanely fast it is!!! I was able to get some stick time with this little beast and then shot this video....

http://www.youtube.com/watch?v=AdWuspG4RnI
Great video!

Ok... must know more.

I have a Don's Wicked/Wemo dynamically balanced setup in my Skyangel F-16 and it's great. Sounds terrific, flies fast but as I understood it, this setup was ONLY good for 3s.

So what's the deal? Doesn't the motor come down screaching hot? What size ESC/battery is he running?

I think I need a Screamer now.
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Old Nov 14, 2012, 02:02 PM
No mods no glory!
micromantis's Avatar
United States, CA, Redwood City
Joined Nov 2010
366 Posts
LOL! Thanks Ray for posting the video, awesome! What a nice day it was.
So here is my set up for the Screamer:

Power system:
Wicked 6000 KV motor
Wemotec 50mm Microfan
Don's thrust tube
CC Lite Ice 50 amp ESC (should have gone with a 60 amp)

Lipo is a TP 4S 1300 65C

You have to let it rest for 10 min between runs.
The ESC is in the airstream so it does not get hot at all. The motor gets just a little warm.
Great set up except the wait between runs.
I haven't had a chance to get the Watt and Amp readings yet.
I also used Don's thrust tube template which you can find on his build thread.
http://www.rcgroups.com/forums/showthread.php?t=1720667
It' my favorite 50mm right now. I would definitely say it's doing 115+ mph right now.
The airframe needs no reinforcement, mine has three coats of paint on it holding it together.
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Old Nov 14, 2012, 03:13 PM
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Joe 1320's Avatar
United States, FL, Sebring
Joined Feb 2006
7,435 Posts
Quote:
Originally Posted by gooniac33 View Post
What an awesome day to fly yesterday!! It was 68 degrees and next to no wind! Got to fly the fleet of 50mm's and ran into Micromantis while I was out there. He had his new Screamer out there with Don's Wicked Wemo 6000kv set up ON 4S!!!!!!! Words can't describe how well this thing flies and how insanely fast it is!!! I was able to get some stick time with this little beast and then shot this video....
Wow... looks to be well over 100 mph, Maybe 115ish. That's kewl!
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Old Nov 14, 2012, 03:23 PM
Augermeister
dahawk47's Avatar
United States, TX, Keller
Joined Jul 2011
2,670 Posts
Went out to re-maiden the Katana yesterday and was faced with another no-go. This time my elevator gimbal on the TX was not responding. Took it apart last night and looks like I'm back in business. Note to self: Do not drop you TX ! Maybe tomorrow. Received a fresh batch of 4S 850mah and 1000mah Nano's. Need to play with the Lipo/Rx placements for optimal CG. Seems like it's best to place to battery standing up along the firewall and have the rx in front.
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Old Nov 14, 2012, 03:59 PM
chuck
santa barbara, CA
Joined May 2009
4,135 Posts
micro , thanks for the info. i would be interested to see what the cell voltage is at full throttle, a real test for a 1300 i guess that 100+ mph cooling air is taking care of the motor cuz it's got to be making some heat!

chuck.
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Old Nov 14, 2012, 04:35 PM
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gooniac33's Avatar
Sunnyvale
Joined Feb 2009
5,029 Posts
Quote:
Originally Posted by Joe 1320 View Post
Wow... looks to be well over 100 mph, Maybe 115ish. That's kewl!
The second pass scared the crap out of me!! A little more tuning with expo will get it even better! At least 110mph... But most likely more!! I am going to try one for sure!!
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Old Nov 14, 2012, 04:58 PM
Wonderfully Wicked
The Don's Avatar
Willoughby, Ohio
Joined Jan 2002
13,086 Posts
That is an awesome video! Assuming 70F air temp I got 110, 123, and 110 mph for the three passes in a row around the 1:00 mark so that gives an average no wind assist speed of 116.5 mph! I can say you have the fastest Wicked powered 50mm EDF that I know of!

For those who have been asking about this setup on 4S, I do tell people it is not intended for 4S as it will want to run around 700-750 watts on 4S. Typically I don't like to run the regular Wicked series motors over 600 watt continuous, also the rpm will be in the 70,000+ range which can outrun ESCs (the Castles are OK up to 130k I think with 6 pole motors), the fan needs to be balanced well, and the rotor will most likely have to be glued to the rotor adapter to make sure it does not slip. So extra care needs to be taken to run the 6000KV wemo combo this way for those who wish to experiment. The 6000KV motor does has thicker wire windings in it so it can handle more current then the lower KV versions I sell and the WOT runs will be not for too long a period on this sized model, and combined with the smaller lipo size used in these models (most likely keeps the watts below 700 from voltage sag under load) so it is a ream of exploration for those who wish to try it out. Simply because of all the extra care needed to make it work correctly, that is why I don't officially recommend it as a 4S system on a day to day basis.

Having said that, I will say it sure is cool to watch what you guys do to push the envelope with the equipment currently available. That was truly Wicked Fast!

Don
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Last edited by The Don; Nov 14, 2012 at 11:48 PM.
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Old Nov 14, 2012, 05:33 PM
Registered User
Joined Nov 2011
1,115 Posts
Quote:
Originally Posted by gooniac33 View Post
A good combo worth trying out. A fellow flier at my field had an AEO 50mm 8 blade fan hooked up to the stock Skyangel motor on 4s. Less than 19amps draw and just under 300 watts with a lot of thrust! It was in his Screamer and it was much more than 1:1 thrust to weight! I think that may be the best combo that I have seen thus far! Very efficient! It flew great too but even at half throttle it was pretty fast! My have to get some 50mm 8 blade fans to try out....
.
wait.... a minute...
the adapter of this 8 blade 50mm fan is 3mm for good.
how can it fit to the stock motor shaft of only 2mm???

AEORC 50mm 8 Blade EDF Ducted Fan Unit
This EDF will take a motor with a maximum diameter of 18mm
Specifications
Blade Diameter: 50mm
Blade Type: 8
Shaft Size: 3mm
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Old Nov 14, 2012, 05:43 PM
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Joe 1320's Avatar
United States, FL, Sebring
Joined Feb 2006
7,435 Posts
Quote:
Originally Posted by flylow2011 View Post
wait.... a minute...
the adapter of this 8 blade 50mm fan is 3mm for good.
how can it fit to the stock motor shaft of only 2mm???

\
The stock motor shaft of the Jpower motor is 3mm.



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Old Nov 14, 2012, 07:48 PM
always something to learn...
metalguy's Avatar
Tacoma, WA
Joined Jan 2011
2,773 Posts
That screamer footage is intense! It appears to fly similarly to my Komet. I like how it slows right down to land, totally controllable. Very cool, great bang for the buck airframe, and the Don's powersystem is insane! Thanks for that.--------Metalguy
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