Electrical Loads Analysis

Another builder was looking for an electrical loads analysis, here is what I have so far. The 915iS engine has dual internal generators; the ‘A’ generator provides power to the Engine Management System (EMS) normally, and a second ‘B’ generator supplies power for everything else in the airframe, up...

Canopy Wiring

Last week I finished the electronics design for the overhead console and sent off the PCB design for manufacture. I’ve already received the parts to stuff the boards, but the boards themselves will take another week. In the meantime, I decided to set up the canopy in my lab...

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),...

Update on Flaps Controller

I’m waiting on the circuit cards to come back from the fab, likely slightly delayed due to the holidays. In the interim, I worked on honing the process for painting and etching the fascia panel. My second iteration is looking better than the first, but I still need to...

Fabricating Flaps Controller

I shared the design concept for my custom flaps controller a few weeks ago, and I got some great feedback from other pilots & builders. I’ve taken that feedback and made a revision 1 of the hardware, to include: Stand-alone operation (no additional parts needed, connects directly to the...

Engine Arrived

My engine arrived today! This is the Rotax 915iS engine, and as I described in an earlier post, this particular engine is used with just 12 hours on the clock. Even though I bought it locally, it was inspected by Lockwood Aviation down in Florida, as they are currently...

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,...

Welcoming Home the First Sling 4 on the East Coast!

14 November, 2020 I recently had the honor to attend the big homecoming celebration for my friends and their newly-completed Sling 4! A huge achievement for Craig & Ellen, who have been looking forward to this day for 6 1/2 years! Before landing Craig did a little fly-by so...