CAD Drawings

If you would like the AutoCAD versions of any of these files (.dwg files, that you can plot at 1:1 scale, dimension as you see fit, modify as you see fit, etc.) please e-mail me at jim@sixspringers.com and I will send them to you. I use AutoCAD LT 2005 but I can up- or down-save as needed, or, send .dxf so you can convert the drawing into a format another CAD package can use.

I am not a professional engineer so these drawings do not have credit blocks, plan, front and right side views, etc. I simply don't need that sort of stuff for what I am doing here. You won't typically see dimensions, either. Dimensions are inherent to the drawing, the CAD file knows them but they are not displayed by default. I typically plot these in 1:1 scale so the dimensions just get in the way anyway. If you need dimensions visible, and can't figure out how to add them, ask and I'll add them for you.

Last note - these drawings are all done in 2D. AutoCAD does very nice 3D, but, I don't need that for what I am doing here. If you need 3D, and can't figure out how to do it, ask and I'll do it for you.

Chapter 13 Parts

This drawing has had the changes made per newsletter #85 page 2. I guess some builders, after taxiing through a pothole or something similar had this area break and thus had to repair it. 2 inches in height were added to the low section in the middle, also, a 1" radius curve was used at the ends of that low section instead of square corners.

The diagram includes 6 each 1.2" circles to make pads for the hardpoints in the NG-51 area, also, I have the Wilhelmson nose lift style mounting bracket drawn.

A second NG-30 is drawn mirror image as well so that you'll remember to make them mirror image - they have the same layup schedules on the "inside and outside" but they are mirror images, not duplicates of one another.

The plan also includes 2 each of the plywood, 1/4" and 1/8" doublers.

Matco Wheel and Brake Assembly

Click on the picture to see a larger version of it

I created this drawing to make it easier to trim the landing gear strut to size and shape for proper mounting of the Matco wheel and brake assembly. The dotted lines are the strut. There is a 1/2" wide or so tab sticking where the top (or bottom actually) of the strut is located, this is designed to be "left on" the part you make to allow the template this is designed to make to be set onto the strut at the right spot, height-wise. I had planned on clamping the template made from this onto the strut both side to side and for and aft for proper alignment, then, mark the strut and cut it. I will also drill holes where all the bolt holes are in the axle mounting plate to allow those to be transferred to the strut for later use. I have this drawing set to exactly 7 degrees from vertical, and, the brake caliper is rotated, counter-clockwise from that, 22 1/2 degrees to allow the bolt patter for the axle to be parallel to the strut per the plans install of the Clevelands.

Landing Brake, Actuator, Bracket and MG-1 and MG-2 Parts

I created this drawing for two purposes. First, I wanted to make an actuator bracket, and buy a linear actuator, instead of buying the electric landing brake actuator kit. Second, I needed to be sure that the geometry I had in mind would work. Both were accomplished via this drawing. The view at the left is of the landing brake in the closed position, if you change layer settings in AutoCAD you can see it in the open position - or click here. I also made patterns for parts MG-1 and MG-2 in this drawing.

Chapter 8 Parts

Given that most of the Chapter 8 parts are flat, I made up a drawing of most of them. Many of these parts I made by printing the diagram, cutting out the piece I wanted, then spray gluing the part print onto the foam or fiberglass "blank." This is probably un-necessary, but, I like to work in AutoCAD and these plan prints can help you keep left and right parts straight, avoid cutting something too short, etc.

Hot Wire Saw Frame

I made this plan up intending to make a hot wire saw in this design. It turns out some fellow Cozy builders in the northern Illinois area have the nicest hot wire saw known to man - so I drive over there and use it instead of making one. They have some sort of wire on it that doesn't stretch when it heats. Works awesome.

Fuel Gauges (Vance Atkinson)

I used this plan to make a slight recess in the fuselage side foam before I did the inside layups over it. This tilted the gauges forward a little (they're still not mounted, but, the recesses are made) to make them easier to see.