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Jay Burkart's blog
Archive for February, 2011
Posted by Jay Burkart | Feb 26, 2011 @ 08:58 PM | 6,060 Views
Got all the sides joined and started finishing the insides of the fuselages. Slide in Landing gear mounts, Wing Trailing edge wing mount reinforcements,
stringers for cowling.
All are mounted in all three. We are setting up with 5/32 landing gear wire as the
targeted flying weight will be 114 oz to use the 1900mah 3S lipos.
Probably 10 to 18 oz of ballast will be needed to make the weight rule.
I am guessing that the finished weight with all the gear will be around
100 oz for the LMR and 96 for the Texaco.
That will bring us close to the 10 oz/sq ft target....Continue Reading
Posted by Jay Burkart | Feb 23, 2011 @ 10:21 PM | 5,412 Views
I have made all the side pieces of the fuselages and have them ready to be joined
Also the wedge piece at the very tail of the fuselage is glued to one side before
joining the sides, it is a piece of 3/8" x 1.5" Trailing edge. The notch is to clear the rudder mounting
screw going up from the bottom the the stab and the other notch is the hardwood crossmount for
the horizontal stab itself. Also is shown how I sand the sides flat.
A Sanding T with the fuselage side pressed against a sanding board
with sandpaper attached to it.
Posted by Jay Burkart | Feb 09, 2011 @ 12:19 AM | 6,199 Views
I have been building fuselage sides for the last several days.
Cutting this lumber in this fuselage requires sawing each piece as a knife nor razor blade
can't cut through this lumber.
And there is a lot of cutting and fitting of all the longerons, uprights, gussets etc.
Right now I have 4 side completed and the 5th is on the board.
Six sides are needed for the 3 Airborns under construction.
With variance in wood sizes you can't really cut all the parts and just fit it together.
Each side is unique and has to be fit together.
I should have the side done and ready to sand in a day or two.
My Dremel saw and 12" sander are my best tools.
Also the pieces are so thick that you can't build one side on top of the other....Continue Reading
Posted by Jay Burkart | Feb 03, 2011 @ 08:18 PM | 6,857 Views
Finally got my saw and a start on the fuselages.
I have been making some of the cut pieces with exact angles and wing saddles
for the fuselages. A lot easier now that I have a small Dremel 4" saw.
The one picture is how I cut out the wing saddle so that the wing sits at
1.25 Degrees positive angle of attack, the stock Airborn is set at about 5 deg
which is way too much for RC flying and good thermaling characteristics.
I have proven this angle after now building 31 Airborns over the last 4 years.
I also have the Horizontal stab so that I can change it's angle if needed but
with settling on the 1.25 deg on the wing I haven't needed to trim the H Stab.