UH-12r: Quickie trim wing

John Windt had volunteered to help get my thrust engine going. In the process of hauling the craft over there, I lost my trim wing. This page shows what I did to make a quickie trim wing. I expected it to last maybe one day, but it's still going strong.

I made a hotwire arrangement. The three pieces of thicker foam are the table and the fence. You can see a bar clamp in the foreground, and another in the background.

Finally, there's a wood gizmo that holds a hotwire at a specific angle. The wood gizmo was hanging around the shop, so I just borrowed it. It seems to be for cutting plow planes.

The 1" piece of foam is the trim wing. Rather than carve out a wing-shaped trim wing, I just made the cross section look like a pencil.

Sand the thing smooth.

Sand the leading edge into a round shape.

Touch that up.

The whole thing laid out before glue hits it.

The way I made the center pivot round and the right size. This turned out to be a stupid idea.

Glue the whole thing together and fiberglass it all in one shot. If I weren't in a hurry it would have been a lot easier. I could have glued the foam and wood together, then glassed it later. See the pincher clamps that are trying to prevent the trailing edge foam from falling out of the fiberglass.

	I made a hotwire arrangement. The three pieces of thicker foam are the table and the fence. You can see a bar clamp in the foreground, and another in the background.
	Finally, there's a wood gizmo that holds a hotwire at a specific angle. The wood gizmo was hanging around the shop, so I just borrowed it. It seems to be for cutting plow planes.
	The 1" piece of foam is the trim wing. Rather than carve out a wing-shaped trim wing, I just made the cross section look like a pencil.
	Sand the thing smooth.
	Sand the leading edge into a round shape.
	Touch that up.
	The whole thing laid out before glue hits it.
	The way I made the center pivot round and the right size. This turned out to be a stupid idea.
	Glue the whole thing together and fiberglass it all in one shot. If I weren't in a hurry it would have been a lot easier. I could have glued the foam and wood together, then glassed it later. See the pincher clamps that are trying to prevent the trailing edge foam from falling out of the fiberglass.