Fuselage

 

DCP_2033

The Fuselage Started by constructing multi purpose Partial Molding Tables, frame is 3/4 MDF cut 4″ wide, skinned with 3/16″ hard board, the Sky Jump Ramp allows the fwd to aft transition curvature (section built the same way) to be molded in. table tops are covered in clear packing tape

DCP_2046

After a down select process a hot wire foam lower fuse radii “block mold” was selected, once attached to the table with drywall screws it got coated with duct tape. The raised duct tape pad is to provide an inward joggle for the wing box connection outside plies

PG_PVA_1quart_200

PVA Release Agent coats all parts of the tooling that will make contact with the layup.

DCP_2049

After the PVA, Peel Ply is applied to all areas of the tooling that the layup will make contact with.

DCP_2051

Foam Core is nailed to the hard board skins with 4 penny finish nails, all cutting & ramps processed in advance. as needed with any foam core a complete Vacuum using a brush attachment is in order to pull up all loose foam dust.

DCP_2058

Micro / Epoxy is applied to the foam, the viscosity needs to be thin enough for the slurry to make it into the pours of the foam. Many who complain about LAF forget to do the Vacuum & Micro steps, these are key to make an airworthy part.

100_1937

Layup in process, Back in more more innocent days, now days I never use any high power chemical product like E-poxy with out a full cartridge respirator

a3c276a8-ebb1-4194-aabb-71c10f8a6d18_400

If you use e-poxy regularly like I have since 1993 you need to have the right protection, Niosh rated cartridge respirators are low cost & available from the Box Stores

http://www.homedepot.com/p/3M-Household-Multi-Purpose-Respirator-65021HA1-C/202080143#product_description

 

DCP_2063

Finished layup on the inboard side.

 

DCP_2080

Both left & right sides free from the tooling, a quick 1st opportunity to sit in the fuselage and make airplane noises. even though the sides are upside down in this pic

DCP_2116

The table is simply inverted with some stand offs added to layup the outside of the fuselage. On larger runs I always roll the fabric kits up then un-roll them on the laminate to limit the fabric distortion & snaging.

 

DCP_2118

Finished outside layup overview

 

DCP_2121

Close up on the layup showing the snake scale look you should see in a correctly done wet layup.

 

DCP_2081

Bottom skin is the next item, at this point its at the core shaping stage. Note I’m not a die hard fan of Last A Foam, I’ve done trials on Divinycell & Roahcell and for the methods used on this kind of construction they would all work.

DCP_2083

Engine Cowling exit air ramp, pre processed in the lower skin.

 

DCP_2097

Finished lower skin inboard surface on tool. Transition Radius section was close enough on the lower skin to re use the sides transition section.

DCP_2100

preliminary un trimmed fit on sides

DCP_2143

The internal Fire-Wall structure, will feature same thermal protection after this point as a Velocity, Ceramic blanket with SST or Galvanized  fire wall outer skin. the corners and sides are Phenolic sheet, not to long after this pic I learned about a way better pre-made sheet laminate hard point material. Phenolic is not to bad for a Firewall application due to its thermal capability.

32075

Up to this point I only knew Phenolic as a Non Wood alternative hard point with good bond capability, William Introduced me to Arnold Holmes “The Repair” he worked may of the V8 Lancair projects with William, Adam Aircraft and other Composites Jobs, he introduced me to G10 pre-made fiberglass sheet. After learning about this material & what it could do it was another jump forward for me in Composites. Arnold is now at http://www.av-mech.net/

DCP_2152

some of the other bulk heads in the peel ply / pre-trim stage.

DCP_2158

Just starting to get mileage out of the tooling tables, now both flat sections are bolted together on the floor with a center line added getting ready for Fuselage alignment & bonding.

DCP_2161

Initial alignment of sides and bulk heads,

DCP_2184

Bulk heads are attached top / middle & bottom with dry wall screws for initial alignment. Roving was used as the fillet (very clean / higher strength than micro for a long run) connection tapes are processed via the plastic / flat pattern transfer method.

DCP_2190

Additional temporary support board are added for the bottom skin, they will keep the lower skin true while the outside layup is processed while the fuselage is in this configuration.

DCP_2194

Top Skin bonded using 1/8″ Copper waxed Clekos and PTM&W structural epoxy adhesive.

DCP_2195

zoom in of the Cleko bond setup, all extra epoxy on the outside cure was squeegy up for a clean bond.

DCP_2198

Tail view of the lower skin bond, the cleats that attach the sides to the tooling tables are also shown.

DCP_2204

Clekos removed, edge fill / sand completed and lower skin outer layup processed. Once a full sandwich structure the bottom skin is ridged and no longer needs the lower temp support boards.

DCP_3029

I loaded up the Fuselage and took it over to the Fly Corvair hanger to show William & the guys.

DCP_3034

William tries on the 500, Rick Lindstrom’s Corvair powered 601 in the background.

DCP_3035

Whobis Cat the Edgewater hanger gangs official mascot inspects the internal layups & bonds.

DCP_3033

None of that crammed like a sardine non since in this plane, i.e. what fills most of the Aero Crafter Kit plane Catalog.

 

 

 

 

 

Advertisements

Leave a Reply

Please log in using one of these methods to post your comment:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s