True, but paying people to fix things is not the same thing as truly understanding the ramifications of a particular design and knowing how to deal with issues as they arise.
Absolutely correct, and that's one of the primary things that went wrong in John Denver's accident.
We pilots are, as a rule, spoiled. We learn to fly on airplanes that were certified in accordance to strict Federal standards. Many of us fly common GA aircraft for years. There are standards for how the planes handle, there are standards to how the controls function, there are standards for maximizing the safety of the design.
None of that applies to homebuilts. We are all trained to expect planes to react to the controls in a certain way, and a homebuilt isn't necessarily going to do that.
I'm kind of twentieth-tier when it comes down to aviation press, so the homebuilt manufacturers rarely invite me to fly demo aircraft. One exception to that was about 25 years ago, when I was invited to fly a tube-and-fabric homebuilt that was like an enlarged Kitfox. The company pilot took off, which I figure was OK since, hey, he didn't really know me. But when we got to altitude and took over, I discovered the airplane had MONDO adverse yaw.
Now, I'd flown Champs, Super Cubs, Stinsons, Stearmans and the like...but had *never* flown a plane with that much adverse yaw. Move the stick to the left....and the plane started turning right. "Lead with the rudder," said the demo pilot, and of course, that worked. But it was certainly counter-intuitive to all my flying reflexes.
That was probably why he didn't let me do the takeoff. Sure, adverse yaw was pretty common in the early days of aviation. But we'd basically solved that by the mid-30s. Even my Fly Baby, a throwback if there was ever one, has differential gearing on the ailerons to eliminate it.
But you can imagine how this might surprise a modern pilot making his first flight in the aircraft.
John Denver had flown other experimental aircraft, and got a checkout in the Long-EZ. A fuel system like that would never have passed muster on an airplane intended to be type certificated, but, as Dana says, Denver didn't truly understand the ramifications. Combine that with needing to read the fuel gauges in a mirror, combine that with the fuel gauges not being marked, combine that with the fuel gauges never having been calibrated.....
Well.
Too many buyers of flying homebuilts think that since the plane has completed its test period, all the bugs are out of it. But some bugs are never eradicated.
I once looked at the accident statistics for purchased homebuilts, and found an interesting result. Roughly 14% of all accidents for brand-new homebuilts occur in the first five hours, but nearly 20% of accidents involving a purchaser occurred in their first five hours of flight in that "proven" aircraft.
The builder has several years to prepare for flying their plane the first time. Likely, they'll try to get some stick time in another example of the same type, and will discuss the handling and other issues with other owners. Since they develop the systems, they'll be very familiar with how they work.
Homebuilt purchasers? Heck, they have 100 hours in a Bonanza, they should be able to handle that Lancair OK....
The builder-flown aircraft have a higher number of mechanical issues in those first five hours, but pilot error is greatly elevated among the purchased-homebuilt crowd.
Ron Wanttaja