Alternative Pegs and Stand for SR-71 Blackbird

thingiverse

This is a remix of Duckobert's resized pegs (https://www.thingiverse.com/thing:4802472) for Dauen's re-upload of the fantastic SR-71 model (https://www.thingiverse.com/thing:4773714). There are two iterations - one keeps close to Duckobert's peg design, but the pegs are hollow and split, just like the well known slotted spring pins used in various technical applications. Fits like a glove (finger, actually - the plane parts are the gloves ...?) into the mid/tail section holes. The second iteration is more interesting - it saves A LOT plastic and time, basically it reduces the pegs to some points of their outer diameter, resulting in a "cross" cross section. IMPORTANT: Print these pegs EXACTLY as oriented in the .stl - and you will need a raft! Why? Because you want the layer lines along the length of the pegs (rather than across) to bear the load of the aircraft sections when assembled. These pegs won't break - and if they should you are able to remove them without hassle. Both design iterations give you a tight fit without the possibility of air getting trapped in the peg holes, necessitating drilling or whatever. In any case I recommend you do a test print prior to the real thing - depending on the degree of tuning of your printer the 100% size might be just that wee bit to large to fit comfortably, and you do not want to damage your gorgeous model. Also added an updated remix of the SR-71 stand. Now there's a base and two stand halves. The stand halves are printed lying flat, making the layer lines follow the "fit" extensions - no more breaking of the tip leaving a bit in the model! The halves have a perfect fit to the model and a VERY tight fit into the base. For the original model saved by Dauen I found it a time and plastic saving variety to make advantageous use of the new Flash infill (at 25%) introduced in Cura 4.12, leaving the model otherwise entirely hollow - with three walls it prints just OK for display (and even sufficiently rigid for the occasional spy flight in the living room).