Buzzard Models Mark 8 User manual

MARK 8
A pint sized F3P style fully aerobatic 3D aircraft. Small enough to fly in the smallest of backyards, and even your living room! This
rehashing of an old design from the “new depron”, giving it the weight advantage of the “old depron” with much greater durability
and damage resistance. Our advanced engineering gives you a high performing airframe with very easy assembly.
Wing span : 16"
Length : 16.5”
Battery: 1S 130-1600mah
Weight RTF w/battery: 30 - 35 grams
Please read and understand all steps to these instructions before beginning assembly. This plane is not a toy and is
potentially dangerous to operate. Children should not operate this aircraft without adult supervision. To start assembly,
gather the required electronic hardware and building supplies. You will need some foam-safe glues, and optional paint.
Look for the recommended electronic hardware at the end of these instructions and painting tips in that section.
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Supplies and tools - We recommend Foam-Cure from Bob Smith Industries for gluing most of the foam joints, and will work just
fine to glue everything with. It remains flexible when cured which helps the durability of the completed airframe. There are certainly
other brands of foam glue such as Foam-tac, or UHU por. Regular super glue will attack the depron foam, use only “foam safe” CA
glues. We like to use the BSI Super Gold Plus which is a medium viscosity foam safe CA glue. It also works well on foam to foam and
foam to carbon joints and can be accelerated. To install the covering you will need to buy a small can of 3M super 77 spray
adhesive, don’t try other brands, I have not found anything else that is suitable.
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Kit contents-
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Hinge beveling - Start by beveling all of the hinges. Use a sharp edge of a table or board to support the foam while doing this. Fold
the hinges open, and place over the corner of the table with the hinge side down. Using 120grit paper, bevel the corners of the foam
just enough to allow the hinges to flex closed at least 45 degrees. Be careful that you do not sand though the hinge.
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Picture of hinge flexed closed to 45 degrees - Flex the control surfaces up and down and verify free movement. Sand more if
necessary to allow easy and free movement. Do the rudder, elevator, and aileron hinges the same way.
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Empennage assembly - With the elevator and rudder hinges beveled and freely flexing, dry fit the carbon fiber reinforcements in
place, and then liberally apply a foam safe CA glue with an extender tip. Dabb the excess glue off with a paper towel before it dries.
Do the same with the rudder and elevator control horns. Working on wax paper prevents the parts from sticking to the table.
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Painting- You can optionally paint now, or after the covering is in place. It is easier to do it now. Basic craft acrylic paint works well if
thinned and brushed on conservatively. Makeup brushes work for bigger areas. Alternatively, airbrushing is the best way to paint,
alcohol or india inks are ideal, the same basic acrylic paint thinned one-to-one with windshield washer fluid works great through
an airbrush. Paint can add a lot of weight, so be careful. Good markers also work well. Make sure to test any paint for compatibility.
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Assembly - Working on some wax paper, glue the wing to the mid-fuselage and the horizontal stabilizer. Add the 1.2mm carbon
mainspar first, the 0.8mm fuselage reinforcements go over the top. Add the 0.8mm aileron reinforcements and aileron horns.
Again, dry fit the parts and then add medium foam safe CA. Make sure everything is flat as it dries. CA accelerant can be used.
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Covering - Now is the time to cover the parts. Layout the mylar covering on a flat work surface and starting in one corner and
working your way around, tape the edges down pulling it just taught enough to remove any wrinkles. Layout where your parts will fit
before applying glue. One part at a time, remove each aircraft part from the covering film, and very lightly mist one side with 3M 77
spray adhesive. Stick the part back down on the covering where it came from. Repeat that process until all of the parts are glued
down. I highly recommend finding a large cardboard box to place each part in while spraying the 3M 77 adhesive.
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Trim the covering - With the parts still upside down, trim around their perimeters with a new sharp hobby knife blade over a
cutting mat.
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