Slingology – Building and Flying a Sling TSi

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    My Sling TSi Configuration Omnibus — Every Decision in One Place

    Published by

    Stathis Papaefstathiou

    on

    November 13, 2025
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    My Sling TSi Configuration Omnibus — Every Decision in One Place

    After nearly a year of research, conversations, spreadsheets, and the occasional late-night rabbit hole, it’s finally time to lock everything in. As the airplane transitions into the paint phase, every configuration choice—from engine to avionics, from parachute to visors—has been (hopefully!) finalized. This post serves as a consolidated reference of…

    Continue reading →: My Sling TSi Configuration Omnibus — Every Decision in One Place
  • Build Specs

    Rotax 915iS vs 916iS: Why I Chose the New Generation for My Sling TSi

    Published by

    Stathis Papaefstathiou

    on

    November 5, 2025
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    Rotax 915iS vs 916iS: Why I Chose the New Generation for My Sling TSi

    TL;DR: This post compares the Rotax 915iS vs 916iS, the first and most defining decision of my Sling TSi build. The newer 916iS—nicknamed “The Impossible Engine”—delivers 19 more horsepower, a 2000-hour TBO (vs 1200 on the 915iS), and better fuel efficiency while adding only about eight pounds. Inside, it’s almost…

    Continue reading →: Rotax 915iS vs 916iS: Why I Chose the New Generation for My Sling TSi
  • Hangar

    A Pilot-Owner’s Guide: MOGAS vs 100LL in Rotax iS Series Engines

    Published by

    Stathis Papaefstathiou

    on

    October 31, 2025
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    A Pilot-Owner’s Guide: MOGAS vs 100LL in Rotax iS Series Engines

    TL;DR: Rotax’s iS-series engines were built for unleaded fuel, not 100LL. MOGAS keeps them cleaner and cheaper to maintain, but avgas is still what most U.S. airports pump. The smart move is to use MOGAS whenever possible and 100LL when you must—add Decalin, use semi-synthetic oil, and stick to 50-hour…

    Continue reading →: A Pilot-Owner’s Guide: MOGAS vs 100LL in Rotax iS Series Engines
  • Adventures, Training

    Three Days at Oshkosh: Lessons from the EAA Leadership Academy

    Published by

    Stathis Papaefstathiou

    on

    October 29, 2025
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    Three Days at Oshkosh: Lessons from the EAA Leadership Academy

    When I first decided to build an airplane, I knew I was signing up for a technical challenge—but what I didn’t expect was finding a community that feels like aviation’s beating heart. That community is the Experimental Aircraft Association (EAA), a nonprofit that exists to promote and support recreational aviation.…

    Continue reading →: Three Days at Oshkosh: Lessons from the EAA Leadership Academy
  • Build

    Working with Evoke Aircraft Design — A Builder’s Guide Airplane Paint Scheme Design

    Published by

    Stathis Papaefstathiou

    on

    October 16, 2025
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    Working with Evoke Aircraft Design — A Builder’s Guide Airplane Paint Scheme Design

    TL;DR: Designing your airplane’s paint scheme is one of the most rewarding parts of the build — and working with a professional studio like Evoke Aircraft Design brings structure, expertise, and precision to the process. In this post, I walk through how the process works, from defining a vision and…

    Continue reading →: Working with Evoke Aircraft Design — A Builder’s Guide Airplane Paint Scheme Design
  • Build

    Builder Log: Wings Completed and Empennage Started

    Published by

    Stathis Papaefstathiou

    on

    October 7, 2025
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    Builder Log: Wings Completed and Empennage Started

    It’s been a week since my last visit to Torrance, and the team has been busy! The fuselage and firewall-forward areas are really starting to look like a finished airplane. There are now more oil and cooling hoses snaking their way around the Rotax 916iS, and much of the plumbing…

    Continue reading →: Builder Log: Wings Completed and Empennage Started
  • Ready Room

    Garmin Pilot: Where Are the ODPs?

    Published by

    Stathis Papaefstathiou

    on

    September 27, 2025
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    Garmin Pilot: Where Are the ODPs?

    I was planning an IFR cross-country from Paine Field (KPAE) to Ellensburg (KELN). This is a trip I’ve flown before, threading across the Cascades into central Washington, but this time I wanted to plan it in Garmin Pilot instead of ForeFlight. Why? Because I recently made the switch. And because…

    Continue reading →: Garmin Pilot: Where Are the ODPs?
  • Build

    Builder Log: Wings

    Published by

    Stathis Papaefstathiou

    on

    September 25, 2025
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    Builder Log: Wings

    Since my last visit, the Torrance team kept humming along on the engine and cockpit structure. The brake lines are now tucked neatly under the floor skins, pushrods stretch aft to the tail, and more hoses snake their way around the engine bay. It’s the kind of quiet, behind-the-scenes progress…

    Continue reading →: Builder Log: Wings
  • Build Specs

    Choosing the Right Aircraft Battery: Lead-Acid vs. Lithium Compared

    Published by

    Stathis Papaefstathiou

    on

    September 16, 2025
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    Choosing the Right Aircraft Battery: Lead-Acid vs. Lithium Compared

    TL;DR: Lead-acid batteries remain the low-cost, proven option: heavy, short-lived, and maintenance-prone, but simple and predictable. Lithium (LiFePO₄) batteries bring major advantages — lighter weight, stronger starts, stable voltage, and longer lifespan — at the price of higher upfront cost and reliance on electronics. The choice comes down to whether…

    Continue reading →: Choosing the Right Aircraft Battery: Lead-Acid vs. Lithium Compared
  • Ready Room

    Goodbye ForeFlight, Hello Garmin Pilot

    Published by

    Stathis Papaefstathiou

    on

    September 11, 2025
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    Goodbye ForeFlight, Hello Garmin Pilot

    TL;DR: I’m moving from ForeFlight to Garmin Pilot because it offers a cleaner, more ergonomic UI, genuinely rethought instrument charts (SmartCharts), better pricing without locking safety features behind the top tier, seamless Garmin avionics integration with valuable EIS data, and a company trajectory that feels focused on development rather than…

    Continue reading →: Goodbye ForeFlight, Hello Garmin Pilot
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Eating an elephant one bite at a time.

Categories

  • Adventures (2)
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  • Build Specs (18)
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