Printed 10-sheets of 24"x36" [60.96cm x 91.44cm] Springhill Tag 125# Cardstock.
Photo of 1st sheet (fuselage) printing.
Big set back on Saturday. Started early in the morning. Decided to create a fresh drawing. The old one was created before finalizing my AutoCAD layers, wanted to bring it into a correct setup drawing.
Drew all day long in this new drawing, saving updates as I went. Well, around 6pm, lost power. When computer was back up and running, nothing was saved. That's when I found out failed to setup the AutoCAD 2019 save options.
Left no choice but to start over, decided to change the airfoil and add some landing gear.
Basically redrew the whole thing.
Bought all kinds of carbon fiber square tubing to use for the wing spars, and as needed.
While re-drawing came up with an idea for using cardstock instead. The cardstock will not have any fiberglass or carbon fiber backing it up, the cardstock spar will be nothing but cardstock and Aleene's Turbo Tacky.
Yes, it will be 10-times heavier but, think this idea will work. Test build shows it to be very strong.
No photos yet, plan to build the 1st of 6 spars after the aluminum is welded for the power skid system. Will post photos of it as a "bridge" holding weight before it buckles. Hoping it will at least support 5lbs by itself.
For safety reasons, certain parts are going to be made using aircraft plywood/basswood and balsa wood. The leading and trailing edge will be balsa wood. A balsa center rib inside the aluminum frame work will be the only balsa rib, two ribs are the aluminum power skid. End of wingtips will be two inches of balsa and basswood to allow the rudders a solid mount. Have an idea how to secure them against the 150mph+ speeds possible. The rudders will be 3/32" plywood sandwiched between 3/32" basswood covered with cardstock. Flutter is a serious concern. Elevons-plywood/basswood.
Model has had complete re-design, should be able to handle 150mph no problem. Weight has been added to slow it down! Reason why the cardstock spars/ribs are being used. Drag being added to reduce speed: Fixed landing gear.
If spar doesn't pass bridge test, then carbon fiber to the rescue!
Mike