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Old Nov 13, 2012, 12:01 AM
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Originally Posted by algy2 View Post
Hi ARGAT,

Great footage with some lovely flying by the rubber models . You topped it of with very suitable music to add to the mood. Thanks for posting.

Hope you can put up more.

Cheers

Algy
Thanks for your kind words, Algy! However, I have to say that I didn't edited the video. The people of www.lepetitjournal.com did so. I just filmed the footage they selected. My friend Marco Guillermo from www.parapente.com.mx built and flew those models in it. Most of them are were built with plans from this thread and outerzone!

There is a written interview as well. I'll upload the link when they get it on line, though I'm affraid it will be written in french.

Ar.
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Old Nov 13, 2012, 02:32 AM
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That video was so enjoyable that I've "mirrored" it to our club's website.
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Old Nov 13, 2012, 03:49 AM
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Video

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Originally Posted by argat1 View Post
http://youtu.be/YaQePIfxvvI

Jus a little footage of what we do here in Mexico City.

Greetings to all!


Ar.
Sehr schönes Video,
leider in Deutschland nur mit einem Trick zu sehen.

Gruß Manni
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Old Nov 13, 2012, 10:08 AM
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Originally Posted by Lototos View Post
Sehr schönes Video,
leider in Deutschland nur mit einem Trick zu sehen.

Gruß Manni
Thanks so much, Bogbeagle and Manni (Danke schön!).

Ar.
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Old Nov 13, 2012, 10:12 AM
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Scanning and Image Processing Technique

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Originally Posted by shuyge View Post
Bob (or anybody else)
Specifically how is this done? I'm using Gimp and I'd like to clean up my scanning this way as well.
Stan (shuyge)
Hi Stan,

I'm hardly a graphics guru and certainly not the final word on the best way to go about scanning and generating full-size PDFs from magazine plans or scale planviews. I'm still very much in the learning stage on how to go about doing this, but I'll try to share the general approach I've been using.

I'm not a Gimp user (yet), so I can't tell you specifically what tools or controls you would need to use in Gimp to accomplish the effect of differentially adjusting the image contrast.

In Paint Shop Pro 5.01 (which is circa 1998), there is a highlight/midtone/shadow tool that can be used to independently skew the lighter tones towards white and the darker tones towards black. This function wouldn't be needed if the magazine pages being scanned were on pure white paper - but over time they yellow, or were never pure white to begin with. So when you do a grey scale scan, or convert a color scan to grey scale, you get a background that is grey toned.

In Paint Shop Pro, there is also a brightness/contrast tool that can be used to increase/decrease the overall brightness and/or increase/decrease the overall contrast of an image. I tend to muck around with both the highlight/midtone/shadow tool and the brightness/contrast tool as I make incremental adjustments to the scanned image.

My goal is to make adjustments that effectively "burn out" the grey tones of the background while maintaining dark lines in the drawing. This is relatively easy to do if the grey tones in the background are very light. The darker the grey tones in the background, the more difficult it is to remove them using this approach.

The extreme application of this approach is to increase the image contrast to the point that the image color palette is reduced to only two values - black and white. Paint Shop Pro has a palette reduction tool that can be used to do this in a straightforward manner. I assume GIMP incorporates an analogous tool. Dithering the palette all the way down to black and white generally works well to clean the background and it also has the effect of decreasing the image file size to a minimum at a given resolution. However, dithering the palette all the way down to black and white produces jagged, pixelated lines. The higher the resolution (DPI) of the image, the less pronounced the pixelation effect, but the larger the file size.

File size is generally not an issue for printing hard copies of the plan, but it is an issue for publishing and sharing files in a forum like R/C Groups. 3 MB is the limit for PDFs here. So there is a trade-off and balance to be struck here between the depth of palette and the resolution that can be employed while keeping the file size under 3 MB.

For plans and drawings that I scan for my own use and not to publish, I scan at 600 dpi and retain a 256 color palette. The resultant files are way over 3 MB in size, but that's not an issue at the blueprint shop. For plans and drawings to be published here, I endeavor to dither the palette down to 16 colors while maintaining a resolution of 150 dpi. To my eye this approach produces a nicer looking end result than dithering the palette all the way down to 2 colors (black and white). But black and white is certainly serviceable in terms of producing a buildable plan, and the resulting pixelation can be mitigated by higher resolution (at the expense of file size).

Depending on your scanner software, you may also be able to make contrast adjustments in the scanned image as it is acquired by the scanner and before it is imported into your graphics program. I have a Canon CanoScan LiDE 600 scanner, which is also a digital antique. But the scanning software that was bundled with it is actually fairly sophisticated in terms of being able to differentially adjust the brightness and contrast of the scanned image. In general I prefer to do untweeked scans and perform all the image tweeking in Paint Shop Pro post acquisition. But if you aren't finding the tools to accomplish the adjustments you want to make in Gimp, you might find them in your scanner software.

There is clearly more than one way to skin the cat when it comes to doing this, and I think the particulars regarding the trade-off between palette and resolution come down to a matter of personal preferences as well as the amount of time available to do the digitizing.

Bob Keller
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Old Nov 13, 2012, 10:59 AM
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Originally Posted by robinson727 View Post
All..
I'm looking for a little .020 freeflight produced by Berkley called Baby Yank. It was an early ARF with a printed profile fuselage and steam cambered sheet wings.. Flew well and a nice sport model, is there any info out there?
Thank you
Al
Al, I've also been looking for sheet wood free flight model airplanes to use with the Cox.020 motor. Do you have any leads on plans for the Berkley Baby Yank or similar planes. Thank you, Bill Oswego,NY
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Old Nov 13, 2012, 02:45 PM
Reduce the drama...
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Icedriller;
Buttercup, by Fred Reese. Model Aviation June 1985
http://www.rcgroups.com/forums/showt...=561552&pp=100
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Old Nov 13, 2012, 03:04 PM
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USA, TX, Friendswood
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Quote:
Originally Posted by rick.benjamin View Post
Buttercup, by Fred Reese. Model Aviation June 1985
http://www.rcgroups.com/forums/showt...=561552&pp=100
...steam cambered sheet wings...

That looks like a built up wing to me, Rick. Keep lookin' while I'm looking, too.

g
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Old Nov 14, 2012, 05:07 PM
Reduce the drama...
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Icedriller;
Humbug 020 slab plank
http://www.rcgroups.com/forums/showp...postcount=6427
Little Red Twin
http://www.rcgroups.com/forums/showp...4&postcount=87
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Old Nov 16, 2012, 10:45 AM
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Icedriller,

Here's one you might like. The Ranger 30. I think its old enough for this thread?

g
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Old Nov 16, 2012, 03:06 PM
Balsa breaks better
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Buchanan Mi
Joined Apr 2005
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Quote:
Originally Posted by giuseppi View Post
Icedriller,

Here's one you might like. The Ranger 30. I think its old enough for this thread?

g
Nice work G. Any chance of getting the parts plan in a single sheet?

Thank You,
Joe

Who is lucky enough to have access to a wide format printer ;<)
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Old Nov 16, 2012, 03:30 PM
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Originally Posted by Thermaler View Post
Nice work G. Any chance of getting the parts plan in a single sheet?

Thank You,
Joe

Who is lucky enough to have access to a wide format printer ;<)
I'll try to "Photo Shop" it together.

g
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Old Nov 16, 2012, 05:02 PM
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Okay Gimped and Photo Shopped. Not perfect but okay. If someone with better skills than mine can improve on it, then by all means be my guest. It can stand to be darkened a bit, but my neck's killing me right now! The scale might also be off a bit.

g
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Old Nov 16, 2012, 07:13 PM
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Canada, ON, Hamilton
Joined Oct 2005
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solid display model

Here's 1942...... a Brewster F2A-3
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Old Nov 16, 2012, 09:05 PM
Balsa breaks better
Thermaler's Avatar
Buchanan Mi
Joined Apr 2005
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Quote:
Originally Posted by giuseppi View Post
Okay Gimped and Photo Shopped. Not perfect but okay. If someone with better skills than mine can improve on it, then by all means be my guest. It can stand to be darkened a bit, but my neck's killing me right now! The scale might also be off a bit.

g
Thank You G!! It will work for me.

Joe
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