Category: Design Changes

Custom Overhead Console

I’ve created yet another custom piece of cabin tech, this time it’s an overhead light console. The panel has a dome light, swivel adjustable map lights, and red ambient light projectors. I used RGBW LEDs to allow the lights to be set to any color and brightness, adjusted using...

Rotax 915iS vs 914UL: Cost and Technical Differences

By request, here’s a breakdown of the technical and cost differences to equip my Sling 4 with a Rotax 915iS engine instead of the Rotax 914UL engine. As a quick reminder of why I’m doing this: +26HP at takeoff power (5800 RPM), +35HP at max continuous power (5500 RPM),...

Flaps Controller

I prefer controls that provide visual cues of their current setting. I have a minor in Human Factors from my undergraduate days, and one of my professors was quite passionate about aircraft. As a result, I really don’t like using up/down toggles that are so commonly used on experimental...

Heating System Demo

I posted a video on YouTube recently with an early demonstration of the my heating system. Everything is functioning the way I expect so far, and I’m continuing to work on the software. I’m quite impressed with how much air it can move. Here’s a link to the video,...

Heater System Prototype Progress

It’s pretty exciting dreaming up a concept, turning it into a design, and then having a working prototype in your hands, all in the course of a few weeks. I recently watched a video about the new Diamond DA50 RG, a 4-to-5 place retractable gear single engine airplane that’s...

Heater System Preliminary Design

I’ve completed the preliminary design of my automatic heater system. I’ve been concentrating on this for the last few weeks, which is why I haven’t posted much progress on the plane itself. This system recovers the heat from the engine’s cylinder head water cooling loop, forces air over a...

Side Skin Install Part 2

I was only able to log about an hour on 14 July. I started to install the long side rail angle (CF-ANG-010-R-C) that runs the length of the side skin, as well as a number of gussets that connect this rail to the uprights. The gussets share a number...

Side Skin Install Part 1

I’ve been falling behind on regular posts, but I intend to return to a regular rhythm — if not daily, at least on the days when I work on the plane.. So, this post is a little longer as it captures work performed 8 – 13 July. I’ve started...

Rear Seat Belts Part 4

This weekend, I took a break from working on my heating system to complete the seat belt mods for the rear seat. Both seating positions now have a retractable 3-point belt. The second one went a little easier than the first, thanks to a few new tricks along the...

Custom Heating System

I’ve been busy designing a custom heating system for my plane, which is why I haven’t posted in a little while. My Sling 4 kit would normally include a cuff-style heater, which heats air by passing it over the exhaust pipe. It’s a basic system, but many small airplanes...