Author Topic: The most elaborate profile ever (Read 3583 times)

Randy Powell · « **on:** March 22, 2012, 08:29:48 PM »

OK, this is built by Carlos Enrique Barrabino. Now he says that since it's all laser cut, it's not that hard to build. Yeah, sure.

Russell Shaffer · « **Reply #1 on:** March 22, 2012, 08:38:38 PM »

I would say he is certainly in the running for most elaborate. Hope he has a very smooth engine.

jim gilmore · « **Reply #2 on:** March 23, 2012, 01:17:48 AM »

the fuselage looks to be thicker than 3/4 of an inch though? so It may not be truly qualified as a profile

?

Howard Rush · « **Reply #3 on:** March 23, 2012, 02:39:13 AM »

Quote from: Ty Marcucci on March 22, 2012, 11:30:57 PM

Dontcha just hate it when you find yourself saying ,"Gee, I wish I'd thought of that"! Pure work of art. A tip of the old hat to him.

A work of art, indeed. I find myself saying, "I'm glad I didn't think of that." I have lots in the queue already.

Clint Ormosen · « **Reply #4 on:** March 23, 2012, 04:14:38 AM »

Looks unnecessarily complex for a profile. Might as well build a full fuse.

john e. holliday · « **Reply #5 on:** March 23, 2012, 08:42:04 AM »

Myself, I like it. With transparent covering it would be even better. Is it available?

Avaiojet · « **Reply #6 on:** March 23, 2012, 09:04:06 AM »

With the effort he put into that, he could've had Al's "Hawker Sea Fury" completed.

Charles

Mark Scarborough · « **Reply #7 on:** March 23, 2012, 09:17:56 AM »

Actually, given the accuracy of laser cutting, and some of the RC airplanes I have seen, I dare say that the build was probably almost literally a matter of minutes to assemble. Tab and slot assembly garauntees alignment, and it would go together pretty fast. My only concern would be with all the joints and vibration.. however with enough glue edge the stress would be distributed well and that may not be that much of a concern,,,

as to the fuse,, as long as it is 3/4" at the flap hingeline, its a legal profile,, doublers and such are allowed,, oh and the engine exposed from the mounting lugs to the head,,

Avaiojet · « **Reply #8 on:** March 23, 2012, 10:25:06 AM »

Mark, I agree.

The basis of laser cutting is the "vectored line." The laser simply "follows" a "given" Vector line.

Wherever the Vector line goes the laser goes.

Just like my Graphics. The machine, a cutter plotter, operates somewhat the same way. Give it a line to follow and off it goes, it will follow the line.

The "Vector Line" has the accuracy! Where does that come from? It's created in CAD software which is manipulated by the individual using the CAD program.

The "accuracy" of the laser is only that of the accuracy of the "vector line' which it follows.

The parts I drew for The New American, were drawn in a CAD program. I sent the CAD "vector line" file out to be laser cut.

The parts you see in The New American Build, is what I received from the laser cutter, following "vector lines" I drew in my CAD program.

If these drawings are wrong or inaccurate, so is the laser cutting.

And yes, Mark is correct, it probably took minutes to assemble this structure.

However, Carlos' spent a good deal of time doing the layout so everything fits, somewhat time consuming.

Looks like his choice was .125" plywood for the fuselage structure, looks like he also has ply for wing ribs?

His structure is lightened as much as possible, obviously. Only Carlos knows if his efforts saved weight.

If weight savings was the reason for his efforts.

Looks like an interesting project and study to me!

Charles

Tim Wescott · « **Reply #9 on:** March 23, 2012, 10:29:22 AM »

Oooh, crazy, man. Damn that looks good.

Of course, the first time you pull out of a loop six inches below ground level you'd reduce that fuselage to flinders, so it wouldn't last very long in my hands -- but I bet it's light.

Russ Danneman · « **Reply #10 on:** March 23, 2012, 12:41:24 PM »

IT IS THAT!!!!!!!

Bill Little · « **Reply #11 on:** March 23, 2012, 12:50:23 PM »

Awesome concept project.

BIG Bear
RNMM/AMM

Randy Powell · « **Reply #12 on:** March 23, 2012, 03:11:16 PM »

I'm told if flies very well. And he did crash it and rebuilt it. He's also built at least one more and it is possible to get a short kit from him. He is the laser cutter.

Walter Hicks · « **Reply #13 on:** March 23, 2012, 06:20:12 PM »

Kaz Minato Sells these , not cheap , all ply wood, kit then you add the balsa. I have one and am in the process of building it. Fit well not much effort .

Kit is minimal only the plans and plywood parts . Expensive!

Randy Powell · « **Reply #14 on:** March 23, 2012, 06:22:03 PM »

yea, I figured it would be pricey. Cool idea overall. I still like my Ringmaster Deluxe more. And wait till you see Pete Peterson's profile for expert profile this year.

wwwarbird · « **Reply #15 on:** March 23, 2012, 10:43:02 PM »

Whoah, someone spent waaay too much time at the computer.

Pretty neat, but I think I'll file this one under the "better mousetrap" column.

phil c · « **Reply #16 on:** March 26, 2012, 05:04:33 PM »

On an area basis, 1/8 in. white poplar(Italian) ply is the same as 1/4 in. 8lb. balsa. The poplar ply is pretty brittle. Most of the RC kits/ARF's seem to use a denser, tougher ply. I'd expect the pieces in Carlos' model would weigh about the same as 1/8 in. 6-8 lb. balsa. So it should weigh no more than a 1/2 in. profile, but it will be a lot stiffer due to the larger corss-section.

proparc · « **Reply #17 on:** March 28, 2012, 10:02:02 PM »

I keep looking at it and wondering, why didn't he just make it wider and do a full fuselage. Too much complexity for a profile.

Doug Knoyle · « **Reply #18 on:** March 29, 2012, 12:04:44 AM »

Randy, do you know what it weighs?

And...how much does the kit cost?

Doug Knoyle · « **Reply #19 on:** March 29, 2012, 12:17:53 AM »

Quote from: Randy Powell on March 23, 2012, 06:22:03 PM

yea, I figured it would be pricey. Cool idea overall. I still like my Ringmaster Deluxe more. And wait till you see Pete Peterson's profile for expert profile this year.

Wow! Me too! Just looked it up on Flying Lines. Is that a built-up profile as well?

Randy Powell · « **Reply #20 on:** March 29, 2012, 12:25:58 PM »

Yes, the Ring is a built up profile with nose blocks. I don't know how much a laser kit would be for this profile, but he said he did sell them.

Author Topic: The most elaborate profile ever (Read 3583 times)

Walter Hicks