Industrial Systems Project Blog - Auburn High School » Thrust http://ahsist.edublogs.org Industrial Systems Technology Mon, 13 Oct 2008 19:17:20 +0000 http://wordpress.org/?v=2.8.2 en hourly 1 Thrust Duct Progress http://ahsist.edublogs.org/2007/02/10/thrust-duct-progress/ http://ahsist.edublogs.org/2007/02/10/thrust-duct-progress/#comments Sat, 10 Feb 2007 14:02:37 +0000 ahshover http://ahsist.edublogs.org/2007/02/10/thrust-duct-progress/ This week we’ve made some significant progress on the thrust system. We got the two pieces of 1/8" plywood glassed together around the circular form. We need to cut them to length now and close the duct. Also yesterday we got the back side of the 2" foam completely glassed. We will cut them to length next week and begin to shape to the proper air foil shape. Currently I think we’ll try to hot wire the large majority of the shape using a table and the clamped hot wire bow at the right angle. We’ll have to rig it like a router table or something to get it to follow the radius correctly. It will be interesting to see what we come up with. Progress is definitely being made though.

]]> http://ahsist.edublogs.org/2007/02/10/thrust-duct-progress/feed/ 0 Thrust Duct Beginning http://ahsist.edublogs.org/2007/01/28/thrust-duct-beginning/ http://ahsist.edublogs.org/2007/01/28/thrust-duct-beginning/#comments Mon, 29 Jan 2007 03:46:59 +0000 ahshover http://ahsist.edublogs.org/2007/01/28/thrust-duct-beginning/ The work on the thrust duct began earlier this month. First step was to cut the two plywood discs to the size specified in the plans. We did that by making a circle cutting jig out of a piece of 1×4 screwed to the router. The router was then screwed to  aboard at the right radius. We used a straight cutting bit and just ran the router around the center. Once these were cut out we screwed them together with the called for 2×4s.

Cutting circles for thrust

We have had some difficulty getting the plywood to wrap around the disc we made for that purpose. We are still in the process of figuring this one out. One tip we have received is to make sure the plywood grain is running the correct way. I could have kicked myself fo rnot thinking of it myself.

The students laid out the arcs on the foam for the thrust duct.

Laying out the arcs 

Then they began cutting the relief cuts to make the bend easier around the plywood. They used a cordless circular saw for the relief cuts. What a mess this made.

Cutting relief cuts

We had a small problem with the part once it was cut with the reliefs. One of the students got a little carried away when moving the foam and it broke down one of the reliefs. After speaking with one of the other schools that does this regularly they said we could just fiberglass the part back together and drive on. A huge relief. It was about 2 days wrth of work saved.

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