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J3flyah's blog
Posted by J3flyah | Feb 29, 2008 @ 03:28 PM | 3,058 Views
With the addition of Air Force markings to the Boxcar, it is finished. I couldn't be more happy with the results. What I like about the Boxcar is that it's different than most modelled airplanes and a neat flying twin.

Thanks to everyone for the comments during the build.

J3
Posted by J3flyah | Feb 17, 2008 @ 07:54 PM | 2,285 Views
Now that I am satisfied with the fact that the Boxcar indeed flies, I have been trimming it out with windows. Soon I will have the AF markings added.

Also, I cleaned up the "guts" on the underside. Foam & Tape had suggested I cut a cavity out of the fuse to store all of the servo, ESC, and battery leads as well as the battery and receiver too. But I decided that on this Boxcar it was not really necessary as there were no problems encountered while flying. And the fact that the "guts" are not seen too easily on the underside.

I did tidy up the leads by using small dabs of hot glue (low temp) on the connectors to strategically locate and hold the wires close to the wing's underside.

If I didn't have various battery sizes (physical size..), then I would probably bury the battery into the side of the fuse. Instead, I will stick with the velcro.
Posted by J3flyah | Feb 14, 2008 @ 06:23 PM | 3,592 Views
Maiden flight of the Boxcar was performed this afternoon at an indoor soccer center here in Omaha. Several very successful flights were made. I am happy!

The controls are very responsive and it tracks real well in the air. A video was made and I uploaded to Google Video. Here is the link for you to view the Boxcar in flight: http://video.google.com/videoplay?do...66541013&hl=en

Again, I am very pleased with the way this plane flies. No bad characteristics at all.

My personal blog on RC Groups documents the steps taken from drawing up the plans to this first flight.

Questions and comments are welcomed. Thanks!
Posted by J3flyah | Feb 10, 2008 @ 07:18 PM | 3,537 Views
From drawings I made six weeks ago, cutting the foam, and now assembling the Boxcar, I am that much closer to the maiden flight. With Step 8 I have accomplished mounting the four servos, two ESCs, and wiring it all in. The elevator and ailerons are now functioning as is the steerable nose wheel. Weight at this point is 27.5 oz.

The CG is at 30 percent of wing cord. I will be able to shift the 3C lipo battery if necessary to find the optimum CG.

I'm not real happy with all the "plumbing" hanging on the underside of the wing. It will be arranged better and placed out of the slipstream as best as possible.

Remaining work is the addition of windows and AF markings. Thanks to everyone for the favorable remarks and encouragement! If this Boxcar is successful, I just may do a traditional build scale model with a wingspan of 6 to 8 feet. Thanks!
Posted by J3flyah | Feb 06, 2008 @ 10:15 PM | 2,669 Views
The entire plane has been painted, less the elevator and ailerons for now. Dove Gray is the color of the Krylon H2O spray paint. A little darker than I wanted which is making me hesitate using the white color on the topside of the fuse with red trim. At least she's not pink anymore......!!!

Any reaction to the Dove Gray and/or suggestions?
Posted by J3flyah | Feb 05, 2008 @ 01:20 PM | 2,539 Views
With gear and motors mounted, weight is at 19.6 oz. My target weight has been 22 - 26 oz. Photos show progress with final shaping of fuse, booms, and wing. Nosewheel will be stearable with a separate servo. Flying surfaces are only ailerons and elevator.

After completing the elevator and ailerons, the next step is to paint with Krylon H2O latex spray paint. I will finish in gray, white, and red with Air Force markings.
Posted by J3flyah | Jan 23, 2008 @ 02:31 PM | 3,058 Views
The wing of the Boxcar actually droops downward toward each boom before positive dihedral is added to the outer wings. I have accomplished this by making "V" cuts into approximately 75 percent of the foam's thickness. This allows the wing to bend easily. The hot glue gun was used to place the glue sparingly into the "V" cut prior to bending the wing to the angle needed.

This procedure worked good on my blue Corsair. However I had to make six "V" cuts in the Boxcar's wing. Dihedral spars were added at these locations for strength and less flexing of the foam wing.
Posted by J3flyah | Jan 21, 2008 @ 08:01 PM | 2,872 Views
This evening I did a mock-up of the Boxcar after using a ni-chrom hot wire to cut out the wing openings in the fuse and booms. Two cardboard templates were used either side of the piece I was cutting out with the wire. Worked well and everything is aligned closely.

I need to do some final shaping of the vertical stabs and dorsal fins as well as the wing itself. The horizontal stab and elevator will be another step.

The wing will have a droop downward from the fuse to each boom. Outward from the boom to the wing tip there will be a slight dihedral for stability in the air.

Weight at this point is 10.2 oz. which will bring me close to my goal of obtaining 22 - 26 oz. total weight. This has been a fun project so far.
Posted by J3flyah | Jan 18, 2008 @ 09:07 PM | 3,036 Views
Here are three photos of the Boxcar project. I am building out of pink 1/2" foam like my blue Corsair. It is a profile model with a 48" wingspan and fuse/booms length of 38". Anticipated weight 22 to 26 oz.

The fuse is made from 3 slabs of 1/2" foam glued up. While the two booms are at 1/2" thickness. Elmers Craft Bond spray adhesive was used which I found in the craft department of Wal-Mart. Did a good job. It is acid free which is a must working with foam.

My tabletop bandsaw was used to cut the foam after tracing the templates. Notice the dark marks on the perimeter of the fuse and booms. This is where I stayed in one place too long and the friction from the saw blade melted the foam. Key is to move quickly I learned...

Next step will be to cut out the wing and horizontal stab.

My plan is to use two servos for the ailerons, one for the elevator, and possibly one for a stearable nosewheel. Two electric motors swinging 9 X 3.8 props will be used.
Posted by J3flyah | Jan 11, 2008 @ 10:48 PM | 4,457 Views
STEP 2: After finalizing the shape and profile of my Boxcar project, two templates were cutout. One for the fuse, and the other being the boom that houses one of the engines and tail.
Posted by J3flyah | Jan 10, 2008 @ 08:45 PM | 6,043 Views
After seeing "Foam & Tape's" neat looking foam Flying Boxcar on his blog, I decided that was my next indoor electric project. F&T scratch built his out of foam, but he didn't have any plans.

So I went on-line and found a 3-view drawing of the Boxcar. The drawing is small, however I have been able to proportion the scale to the size I wish to build. The wingspan will be 47" and the length 38" powered by two outrunner electric motors. Like F&T, I will use ailerons and elevator only. Aside from the speed control. Like my blue Corsair, I will use 1/2" pink foam and combinations of other types of foam material.

Thanks F&T for inspiring me to take on this Flying Boxcar project.
Posted by J3flyah | Jan 10, 2008 @ 08:26 PM | 5,718 Views
Few of my 2007 projects shown here. I build and fly everything from large gasers to indoor electrics....Continue Reading