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Old Dec 19, 2007, 11:06 AM
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RoyEOetting's Avatar
Fairborn, OH
Joined May 2004
295 Posts
Matt, can you print your color schemes directly on Depron ? I tried that a few years ago with an ink jet but the result was very faded. I'm going to try it again. Perhaps if I prime the surface it will take the ink better. I also found out since I last tried it that the printer has advanced setting which permit me to dump more ink. The advantages are worth the try. One - I won't have to contact cement templates to the foam to cut out the parts. Two- I can get a pretty intricate color scheme with detail at a low cost in weight. The disadvantage is I can't shape anything after it is done without messing up the finish. Your simpler designs seem like they were made for this procedure. The other option would be to cut sheets of blue foam and print the parts on that. The blue foam is more malleable than depron.
I did a quick test checking to see if I could create 3D poly lines and then flatten the sheet and I can. I'm not talking compound surfaces but surfaces like the one you created in front of the canopy in your example. The biggest trick will be to create the outline. I might have to do that part in Rhino.
Sorry if this sounded like I was thinking out loud but i guess that is what i was doing. Any thoughts on anything I said would be appreciated. Good luck with your F-22.
Roy
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Old Dec 19, 2007, 11:11 AM
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Upstate NY
Joined Jun 2007
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Roy, another option would be to print it on tissue paper, then attach the tissue to the depron. Tissue weighs almost nothing, especially one layer.
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Old Dec 20, 2007, 05:51 PM
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Michigan, United States
Joined Sep 2003
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Hi Roy,

Yeah it would be great to be able to print right on the foam with an inkjet. I've never tried it but I would imagine that color coverage is not so great as you mentioned. The big drawback to me is the time needed to create the graphics and get everything "just right". I was working on an F-16 that used printed paper skins a few years ago and it still needs a LOT of work.

Browse around in the Indoor forum and you will see a lot of beautiful models using the tissue method that Metroid mentioned.

-Matt
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Old Dec 23, 2007, 01:45 PM
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Michigan, United States
Joined Sep 2003
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I just finished the first test model and I'm fairly satisfied with it. Things I learned:

- The upper fuselage skin needs to be pre-curved so the tension doesn't deform the wing plate

- Vertical tails need to be mounted with some kind of jig to get them aligned properly

- Battery needs to sit farther back than I thought to get the CG correct

- Next model may need to be slightly larger for battery clearance (~5%)

Weight with all the gear is 4.3oz, should be slightly higher with paint and misc linkages.

Happy Holidays everybody,

-Matt
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Old Dec 23, 2007, 02:42 PM
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Upstate NY
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looks very solid - nice job!
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Old Dec 23, 2007, 03:44 PM
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Janusz Jawien's Avatar
Los Angeles Van Nuys, California, United States
Joined Apr 2002
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Beautiful job Matt!

Your last post makes me do one of those!

Happy Holidays to All!
Janusz
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Old Jan 13, 2008, 06:29 AM
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Joined Oct 2007
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is there any progress on this plane? would be cool as a 30mm version too

Jacar
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Last edited by hyper-dart; Jan 13, 2008 at 06:44 AM.
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Old Jan 13, 2008, 10:29 AM
Supersonic hover
Esprit440's Avatar
Michigan, United States
Joined Sep 2003
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Final templates are almost done, build will start this week. Not much time left!

-Matt
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Old Jan 13, 2008, 05:29 PM
To drive or to fly......BOTH!!
FresnoJay's Avatar
USA, CA, Clovis
Joined Apr 2007
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Matt again nice work. May have to give this one a go after the panther.

Jason
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Old Jan 27, 2008, 09:21 PM
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Esprit440's Avatar
Michigan, United States
Joined Sep 2003
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Success!

The maiden flight of the second version went very well this afternoon. I rushed to get everything done late Saturday night, and the weather cooperated today with light winds and a practically tropical 33 degrees.

It has quite a wide speed range and the thrust vectoring paddles allow it do to tight "power loops" almost indefinitely. Roll control was good but not quite equal to ailerons even with the paddles.

I set up my camera out in the field but out of a 7 minute flight video got only 10 seconds or so of the plane in frame.

I'll paint it up this week and try to sneak in another flight after work if it's light enough.

Final specs:

WS: 15"
AUW: 4.8oz
Wing area: 98 sq.in
Wing loading: 7.1 oz/sq.ft
Fan: GWS EDF-40
Motor: Feigao 25T 5800kV
ESC: Castle Creations Phoenix 10
Battery: 3S TP 730
Receiver: Berg 4L
Servos: 2x Blue Bird BMS-303


-Matt
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Last edited by Esprit440; Jan 27, 2008 at 09:32 PM.
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Old Jan 27, 2008, 09:33 PM
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Upstate NY
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very nice! lots of great entries for edf40...
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Old Feb 01, 2008, 12:00 AM
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Esprit440's Avatar
Michigan, United States
Joined Sep 2003
1,043 Posts
Here are the final images of the model and flight video for the deadline. It feels good to finish!

Flight video 2

-Matt
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Last edited by Esprit440; Feb 09, 2008 at 09:35 PM. Reason: new flight video
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Old Feb 01, 2008, 12:40 AM
Fly it like you stole it..
Tram's Avatar
Florence, Al
Joined Oct 2000
29,310 Posts
Are there going to be plans on this available?

Jeff
www.CommonSenseRC.com
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Old Feb 01, 2008, 12:49 AM
Supersonic hover
Esprit440's Avatar
Michigan, United States
Joined Sep 2003
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Hi Jeff, yes I am going to put together plans and a build guide soon.

-Matt
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Old Feb 01, 2008, 12:50 AM
Fly it like you stole it..
Tram's Avatar
Florence, Al
Joined Oct 2000
29,310 Posts
Nice..
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