Post 5: 3-Ounce Ribs & Carbon Spars
- UL Plans
- Apr 19
- 2 min read
April 19, 2026: Morning
The production line is moving! I've got the first batch of wing ribs out of the jig, and the numbers are exactly where I want them.
📏The Stats:
These are 48-inch chord stick-and-gusset 1/4" Douglas Fir ribs. Despite the size, they are coming in at a featherweight 3.0 ounces each. They are built directly in my jig (which I plan to sell alongside the plans) to ensure a "zero-tolerance" fit for that sleek, low-drag airfoil. The plans show a 1:1 template layout if you don't want the jig.
🚀 The Hybrid Evolution:
Most people are used to heavy, solid wood spars or floppy aluminum tubes. The Canyon Lightning™ and Carbon Canyon™ are stepping into the 21st century. These 3oz ribs will be bonded to hybrid Douglas Fir / foam / carbon wing spars.
Why the Hybrid Spar?:
1️⃣Weight: I'm shaving nearly 33 lbs off the wing weight compared to traditional solid wood JN-1. The original Affordaplane aluminum wing set, finished, weighed in at about 70-75lbs. My wing set is on track to weigh about 35-40lbs.
2️⃣Safety: No more hoping the wood is perfect inside. By using thin Fir caps and wrapping them in structural carbon fiber, I'll create a spar that is stiffer and stronger than aviation spruce at a fraction of the cost.
3️⃣Durability: This creates a monocoque skeleton that won't sag, warp, or fatigue like the 1970s designs.
The Comparison: The original aluminum tube-spar wings on the Affordaplane weigh in at a hefty 75lbs. By switching to my hybrid carbon/wood system, I'm slashing that to just 40lbs. That's 35 pounds of dead weight gone! In Part 103 that's not just a weight save -- that's a massive performance rebate. Plus, the carbon-wrap spars offer a massive increase in torsional rigidity, meaning no more wing flex and much crisper control authority in the rough stuff.
Building an airplane for under $2,000 doesn't mean compromising, it means out-engineering the "old way".
Who else is ready to fly wood and carbon? 🛠🛩
Follow me for more updates and watch the Canyon Lightning™ become an airplane.
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