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  1. BrianW

    Thoughts on terminating wire cables with ferrules: copper/aluminum, wire-wound, stainless.

    There are contrasting techniques of terminating tension wires. 1) threading a solid wire through a wound wire and finishing with a hook in the wire 2) threading a cable through a bobbin and ferrule, secured by two three or four crimps 3) threading a cable through a tapered cylinder, with...
  2. BrianW

    Down-Home Vibrometer

    For several years, I owned a C-150 formerly used by Spartan - Tulsa for training. The overhaul engine in it had chrome cylinders and was remarked on for its smoothness. I supposed that Spartan would have used vibration analysis in the course of training A&Ps. I needed to smooth minor prop...
  3. BrianW

    Simplicate & Add Lightness

    You could learn a thing or two by looking at that old plain-jane workhorse - the Cessna 150. 1) Stall warning. cut a vertical slot in the wing leading edge. Blank it with a curved cover which is adjustable in height and leads to a pipe to the cockpit end which is fitted with a...
  4. BrianW

    Sampling Light Aircraft Crashes

    I took a look at an NTSC database of accidents. I sampled fourteen months of light aircraft 2007-2008 1 Champion 3 Cirrus SR22 1 Piet Aircamper 1 RV6 2 RV7A 2 RV8 1 Sonex 1 Sorrel SNJ7 I did not check the investigated source, instead supposing that most crashes are related to pilot error -...
  5. BrianW

    Metal tube joint basics

    Joining square tubes to be welded takes one straight cut. Jointing round tubes to be welded takes a hole saw on a drill stand. Joining tubes to be bolted can use a sawn slot, and a flat profile end fitting to be welded on a long tube axis. But a method which always seemed like an eye-sore was...
  6. BrianW

    Swaged Studs on Control Cables.

    Always admired the swaged studs used on C-150s. Saw a HAAS ad today about swaged studs. Any idea of their pull out force as a fraction of cable ultimate strength...
  7. BrianW

    Rotax Hard Starting.

    Rotax Hard Starting. NGK resistor plug caps are used on many Rotax engines. Model LB05EZ is sold as a 5k ohm ( = 5000 ohms) spark plug resistor cap. Older plug caps may go high resistance or open circuit. This makes for hard starting, and may overstress the ignition coil etc. A cheap meter...
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