Once the fuselage sides
are positioned vertically on the jig and you have the cross tubes
in place from station 2 to 4 (square the center and lock it all
in!), you're ready to bend the sides to form the nose and the
tail. Here's how we did that: Spend plenty of time determining
the EXACT spot you wish the bends to occur. The Universe will
only remain in balance if you end up bending the two sides of
your fuselage symmetrically. Use a straight-edge on the drawing
to extend the horizontal lines of the center section. The exact
points where the fuselage bends inward will appear, settling
all arguments and winning all bets. Have blocks in place on
the jig to form stop points exactly where you want the tubes
to be. Otherwise you may over-bend and kink the tubes. Also,
have additional blocks ready to nail down into place once the
tubes are in position. Clamp a large square next
to the stop block to insure that both the top and the bottom
of the fuselage side are evenly bent. Go to a larger torch tip
(wider flame) and preheat the entire area of where you are going
to make the bend. Once you've put some heat
into the area, play the torch vertically at the points of the
bends. Work the torch around back and front of the tubes to heat
the points to a cherry red. Do both top and bottom, not spending
too much time on either one. Rule of thumb: count to three and
move! Later on, you'll get a feel for the color of the steel
and will know when to go to the other cluster. KEEP THAT TORCH
MOVING! Have someone putting slight
pressure on the end of the fuselage in the direction it's suppose
to bend - BUT DON'T FORCE IT! The tubes will bend when they're
ready. The idea here is to heat the point of the bend all the
way around until the bend starts to occur, then maintain the
nice orange-red color all the way around the tubes in two places
at the same time. Piece of cake! The tubes will suddenly
begin to bend. The person at the end should simply maintain some
pressure to move the tubes along. Once the tubes are at the stop
you placed earlier (and lined up vertically square with a large
square clamped at the right spot) then withdraw your heat to
let it all cool while holding the tubes against the stop. Nail down the last holding
blocks to keep it in place. Repeat as needed around
the fuselage until done. To celebrate, turn the shop radio up loud and sing along to "Stairway to Heaven" as soon as it comes on! "Bad to the Bone" is a suitable substitute. |
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