[79FT]: Building Things
cleanup, and more bending
|On:||Jun 16, 2014|
|Tags:||CAD, fuselage, torque tube, control system, ailerons, elevator, lower wings, fittings|
For starters, cleaned up the torque tube; added all the hardware (thanks cwilliamrose again for AN hardware models!) and proper mates. Was a nice warm-up, and came out real well.
Torque Tube, Cleaned Up with HW
After that, added the lower wing front fittings to the fuse. Piece of cake! :)
Lower wing front and gear rear fittings
... and zoomed in.
Notice on the above picture how they interfere with the tubes of the fuse truss (geometry penetrates one another). There are a couple ways to fix that; plans just call for 'trimming in place'. Note to self: figure out if the weld should only be around the bottom longeron; or if to weld the top of the fitting to the vertical too?
The cool thing about SW is that I can "cut" in place; add a bit of margin on the real pattern for the fitting, and make it to fit without constant trial and error.
And then, lower wing rear fitting.. that one is tricky due to the way it's dimensioned on the plans (it makes sense plan-wise, since it maintains clearances between longerons and spar butts, etc; so hole positioning takes metal thickness into the account). Can't believe it took me 2 hours and a few tries to figure out how to model this right. Learning curves be damned :)
Lower wing rear fitting
Now, the reason for all that trouble is that getting the flat pattern out of that is just 1 mouse click!
Lower wing rear fitting
I think this was a great day. :)
A checkride ought to be like a skirt, short enough to be interesting but still be long enough to cover everything.
for now, just the bare minimum
|On:||Jun 15, 2014|
|Tags:||CAD, fuselage, torque tube, control system, ailerons, elevator|
Started modeling just the very basics of the torque tube. The idea is to hang it on the fuse, attach the aileron pushrods to it, and check clearances in the wings (and finally get to start making them! :)).
Just a few screenshots today. Lots of time spent reading plans (haven't paid as much attention to Fuselage / Control Stick setup as I did to the wings).
Gladly, I had the truss model from way back when (I did it to learn SolidWorks Weldments feature).
Anyways, pretty pictures below.
Aileron Actuator Arm Sketch
... and model.
Torque Tube Collar
Very basic model of the Torque Tube (but all I need right now, minus the aileron arms)
Torque Tube on the Fuselage
And eyeball alignment check - fits!!! :)
Good judgment comes from experience and experience comes from bad judgment.
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