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Old Dec 24, 2004, 02:00 PM
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Portugal
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2nd Lip with 20mm cdr 6 poles 3s2p Etec 1200 1st gen

Results:

12,3A 9,7V

Jorge
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Old Dec 24, 2004, 03:45 PM
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Mr. Boogie's Avatar
Morristown, New Jersey (excl EWR), United States
Joined Oct 2003
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Potential Color Schemes

Too windy/cold to fly.
Soooo....here are a few previsualization attempts at color schemes.

Some should be very weight friendly. In the case of full body paint jobs, I hope I can keep weight gain under an ounce.

Mr. B
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Old Dec 24, 2004, 03:57 PM
EDF Jet Jam 2015 , May 28-31
Kevin Cox's Avatar
St. Louis Intl, Missouri, United States
Joined Jan 1997
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Nice.
I found this one.

IDF
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Old Dec 24, 2004, 04:27 PM
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Thomas Nelson's Avatar
Calgary, Alberta, Canada
Joined Sep 2002
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I'd think the Thunderbirds scheme could be made to work very nicely. Minimal paint for a mostly white airframe, and yet excellent differentiation between the top and bottom.

Then again, I'm a little partial toward the TBird scheme. I like the idea that you're willing to try paint jobs that 'could have been', or 'may yet be'. Hopefully more ideas pour in from the fertile minds here in ezoneland.
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Old Dec 24, 2004, 08:25 PM
EDF rules... :)
AirX's Avatar
Joined Nov 1999
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I like that thunderbirds scheme too...

Eric B.
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Old Dec 25, 2004, 11:09 AM
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Very nice project, I love all stuff here

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Old Dec 26, 2004, 11:14 PM
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Morristown, New Jersey (excl EWR), United States
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Color Schemes

Thanks for the paint scheme input guys! More eyes do sometimes help one see better.

I decided to give the Thunderbird scheme a shot. It's hard to argue with a minimal weight penalty and since I'm not yet ready to upgrade the motor, it seems to be a logical choice.

My AUW has taken a .3oz hit (10.8oz) and I have not completed painting of the canopy,vert stabs and tailerons. I guess I'll be going all white depron on the next build.

Anyway, I've included some shots of the work in progress with my interpretation of the ThunderBirds paint scheme. I'm going to pick up some white paint tomorrow and see where I net out weight wise. Thrust to Weight is currently 9.5:10.8 (.88).

Mr. Boogie
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Old Dec 27, 2004, 07:30 AM
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Thomas Nelson's Avatar
Calgary, Alberta, Canada
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Ahh now that's purdy, Mr B!

Any reason why you don't simply replace the tailfeathers with depron?
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Old Dec 27, 2004, 07:57 AM
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Morristown, New Jersey (excl EWR), United States
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Thanks!


Any reason why you don't simply replace the tailfeathers with depron?

Laziness Tom, I take my time off very seriously .

My birds eventually get dismantled by natural selection .
Plus there are a few things I would like to fix and try differently on the next build including the front nose section (should be fatter) and some ducting tweaks.

I also butchered the bottom Tbird application trying to get around the curves, shouldn't notice it in flight though.

B
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Old Dec 27, 2004, 08:15 AM
EDF rules... :)
AirX's Avatar
Joined Nov 1999
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Looks fine to me Mr. B.

Cheers,

Eric B.
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Old Dec 27, 2004, 08:57 AM
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Quote:
Originally Posted by AirX
Looks fine to me Mr. B.

Cheers,

Eric B.

Thanks AirX,

What's the word on your F18E? Have you got the first prototype built yet?

B
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Old Dec 27, 2004, 10:37 AM
EDF rules... :)
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Joined Nov 1999
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Design is complete, just need to seperate the parts for the finished drawing. Christmas got in the way...

Tonight I will finish the drawing and get back with you...

I have not finished the first prototype yet, as I need some 3mm thick depron. I need to make an order for the magical foam... With this plane I am hoping to get near 1-1 thrust /weight. as for it flying it should perfrom with jet like performance.

Eric B.
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Old Dec 27, 2004, 06:05 PM
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Banff Alberta Canada
Joined Nov 2004
569 Posts
I finally got my himax 2025-5300 mounted on my wemotec microfan and got my static thrust to go up to 11.0 ounces but now I'm drawing 20 amps out of my 3 cell Kokam 2100mah 20c battery pack @ 10.55 volts and intake at 141% FSA and exhaust at 100% FSA .With my himax 2025-4300 motor , I was getting 9.5 ounces of thrust with
a current of 11.2 amps @ 11.3 volts.According to the specs from edf info.com I should be putting out 15 ounces of thrust with this much power going to the 5300 kv motor.I have a feeling that my shaft watts are lower than I expected and right now I'm trying to figure out a way to measure my RPMs by measuring the phase to phase frequency going to the motor.
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Old Dec 27, 2004, 07:00 PM
EDF rules... :)
AirX's Avatar
Joined Nov 1999
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Sounds like the fan is starving for air causing the motor to draw more amps as it tries to move the air thru, how is the intake configured? Is there an area ruled duct leading into the fan or is there a plenum with the fan intake drawing from that area?
The figures Greg has in his website are from the fan on a test stand with an intake lip similar to Mr. Boogies molded intake lip which makes the intake of the fan more efficient than one would think due to the ability of the air to adhere to the curve and draw from all angles.

The figure you give for the 4200 is the same figures I get from my 2015-5300 with a minimal lip. When the airflows more easily then the amps will drop down somewhat and is indicative of either problems ahead or behind the fan. It is much easier to get things wrong on the intake side than it is in the outlet side.

Eric B.
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Old Dec 27, 2004, 07:23 PM
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jalves's Avatar
Portugal
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Eric,

How do we know the right shape of the lip?

That kinf of info is available online?

What's best, a round lip as the WMT minifan (Mr. B style) or a clark Y LE style?

TIA

Jorge
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