HOn2½ Box Cabs - "The Twins"

construction sign

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To get both sides soldered together I used a piece of ceiling tile
and bent up some pins to hold it together and soldered it.


Next is the skin over the roof former's. One side has the former
installed, the other sits beside the engine.


The square tubing didn't work out like I thought, so I just
soldered in the roof former's.


I then bent the over hanging sides down to sort of hide the
side wall/roof joint.


On the RRL forum a member eluded that I should elaborate on my how-to's, on what steps it takes, and techniques to take while soldering the parts
together. So with some intensive picture count I will do that. This exercise will be the making of the roof for the second engine. I added a third rib to
help hold the roof in the proper curvature. Using a jig plate with 1/4-20 holes to hold the rib down for soldering. The stir sticks insulate the brass
from the aluminum plate and keeps the aluminum plate from sucking the heat from the brass.

Roof former's and jig plate.


Add a bit of flux to the bottom of the rib.


Cut up some short pieces of solder. I use 1/16" dia. 60/40.


Clamp the rib to the tubing and add one piece of solder.


Apply heat. (soldering iron or resistance rig tweezers)


And we have a soldered joint.