Reno Racers – Simulating Speed

Below is a copy of the presentation I gave at Airventure 2015 titled “Reno Racers! Simulating Speed.” This two part presentation uses the Reno Air Races to showcase how the Internet can be used to find local weather data that will impact a single-point aircraft design. The second part covers a modern take on the 1988 Sport Aviation article “High Aspect Ratio Wings for Formula One Racers” using code that can be used to perform wing planform trade-offs in seconds.

As promised, the example code written for Matlab is also being made available; I only ask that you share your findings with the community. If you  have any questions or get stuck anywhere, feel free to drop a line.

Matlab Code

I’ve also been porting most of my code to Python lately to get away from the difficulty in sharing programs written for Matlab. With any luck I will have an improved version uploaded soon that will work from within your browser on any type of computer, no installation required.

Build Update 1: Girl’s Got Legs

Finally sitting on her own gear!

While not all that monumental, it did involve figuring our how to get a portable jump starter hooked up to a 12V air compressor to screw into an RV valve extender  running through the wheel pant and onto the tire stem. An exercise in out of the box thinking, to be sure.

I also discovered that we have the hydraulic brakes option. Nifty!

Originally included as Q2 Plans Change 19 (Q2PC19) by QAC, this allowed for a hydraulic parking brake and jointly controlled wheel brakes in lieu of the cable-actuated units. It would seem that our previous owner went ahead and installed these as independently controlled right and left brakes, rather than the factory suggested parking brake/wheel brake configuration.

Time will tell the wisdom of this, but I have made a solemn oath not to deviate from the plans or completed work until this aircraft has cleared its 40 hours of flight time. I refuse to “fix” something that I can’t 100% confirm is wrong to begin with. And while this pledge applies to “cosmetic” modifications, I certainly don’t mean to avoid those that improve safety. The Builder’s Group has done an excellent job publishing all the major modifications needed to build a safe and reliable aircraft (namely the Jim-Bob 6-Pack and the Gall Wheel Alignment). We specifically chose a project that already incorporates all seven of them; a good sign of a committed and informed Quickie builder.

Next step, hydraulic fluid and flox!

Project Time: 1 hour
Total Time: 1 hour

Finding the One

We continued to look for a completed plane, project, or virgin Q2/Dragonfly kit off and on for about a year and a half after the Atlanta adventure. Lurking on the Q List for over a year made me pretty familiar with the builder’s map, and soon I had a pretty solid idea of where these things were located. Our weekly sweep of Barnstormers would occasionally return a listing for a project I’d been quietly keeping tabs on, but more often than not we wouldn’t find anything interesting.

We considered purchasing a project in Sacramento but deemed the journey too far. On top of the distance, the kit was on its fourth owner. Sadly, this seems to be the case more often than not with these little birds. Because they’re cheap and (somewhat) readily available, they get picked up by people that may not be very dedicated to the build. When the shine wears off and reality sets in, they get kicked down the road to the next owner; if there was one thing we wanted to avoid at all costs, it was a hodgepodge-built aircraft. We were already taking enough risks by choosing a squirrely kit that’d been orphaned in the 80s, and we weren’t looking to add more checkmarks in the ‘cons’ column.

When Reg Clarke’s beautiful Bird Xpresso came up for sale, we drooled over the fantasy but ultimately passed. The sticker price was too high, and Michael wasn’t crazy about the Subaru conversion if I recall correctly. A Dragonfly on the east coast caught our eye, but it’d suffered a prop strike with accompanying “minimal composite damage to the fuselage.” In the name of safety, we moved on.

Frankly, we pretty much stopped looking. By then, Michael was up to his eyeballs in graduate school and I was struggling to make ends meet while working on my nursing prerequisites. Another year passed. Soon, our desires for a build of our own got shoved into the “maybe someday” category. As we fell deeper into our studies, we mostly gave up on the idea.

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“I have something to show you,” Michael said to me over the rim of his Coke cup. With that, he pulled out his phone and slid it across the table to me. When I saw the Barnstormers logo on the top of the screen, I’ll admit I rolled my eyes. Hadn’t we agreed that this wasn’t a good time? We’d just bought a house, dumping most of our liquid assets into the down payment and a bathroom remodel in the process. Regardless, I snagged his Droid and read the ad.

Surprisingly, the Q2 listing staring up at me seemed promising. Single owner, kit was bought in ’83, 75hp RevMaster engine included, full instruments, and loads of paperwork to accompany it. All of the composite work was already completed, but that was either going to be really good or really bad. There was no listed asking price, either.

“Huh,” I responded. “Looks interesting.”

“Think so?” He asked. “In that case, look at the phone number.”

What? Weird request. (256)555-5555….

…256?

“Whoa, it’s in town!” I exclaimed. I wasn’t feigning surprise, either. After two and a half years of e-stalking, I thought I had a good idea where most of the in-progress Q2s were located. How did this one manage to elude us while sitting directly under our noses?

“It’s in Madison, actually,” he replied. “Although I can’t for the life of me figure out how it escaped us. I’ve got enough contacts at the local airports to have heard about a Q2 in the area by now.”

“He must not be an active pilot,” I guessed. Slowly, that excited feeling started to creep up on me again. “Give him a call! Do it do it!”

Michael dialed him up, and they spoke about the project for about twenty minutes. Everything I could make out from the muffled receiver noise sounded perfect. When he looked at me and raised an eyebrow, I immediately knew what Michael was about to ask and simply nodded before he could ask it.

“Well Jim…this is a bit of an odd question, but what are you doing tonight?”

There was a pause on the other end of the line.

“…Watching ‘Shipping Wars?'”

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All in all, we went to look at it on three separate occasions. Our fellow Q2-loving friend Dave gave us a large list of things to look out for and red flags to be aware of. Each trip, we focused on a section of his outline and compared notes over the phone. The only negative against it was the fact that it had been built for the RevMaster and not the O200. We decided we could deal with it in light of the good stuff.

The composite work was utterly immaculate. Jim had kept every piece of information, every letter, email, or correspondence, every receipt, and every scrap of paper that had anything to do with the plane. Everything was neatly bound in six D-ring binders along with the original plans. As he went, he’d color coded each page with highlighter: yellow for started, orange for finished, and blue for double-checked and signed off. He’d printed off every single issue of Q-Talk and arranged them by subject matter. There were hundreds of pictures of the build progress. He’d already installed 5 1/2 of the 6 builder mods we wanted to incorporate.

When he showed us a crisp laminated diagram of the wiring schematic, I knew it was coming home with us. This is what we’d been hoping to find for three years…a single owner project that had been exhaustively cared for and built with a strict attention to detail. And it had popped up less than twenty miles from our house.

At the end of the day, we probably paid a little more for it than we should have, but I don’t regret it at all. Jim offered to help us see the project through to completion, and that kind of assistance is worth more than money anyway. Confidence in the previous builder’s work instills a peace of mind that simply can’t be bought.

After three years of searching and slogging, we finally brought our Q2 home.

Explanations and First Attempts

The Internet is a funny place, especially if you’ve grown up in the age of Google. Why, you ask? Because my Gmail account, which I’ve had since they were in beta, holds records of most of the various misadventures that have occurred in my life.  One of them a perfect account of how we ended up looking at a “nearby” Q-2 in the first place, in every exact detail we would have otherwise forgotten.

Before delving into the tragic story of the Atlanta Quickie however, I suppose it would be pertinent to explain why we were searching for a Q2 to begin with.  There are other planes that fit our mission profile, after all.  We considered a KR2, a Cardinal, and a myriad of other aircraft.  Really, the reason we decided on this particular type of plane came down to four different factors:

• Affordable purchase price. We’re both students (masters’ and bachelors’ respectively), and our budget was a major determining factor in what we would ultimately end up buying.  For all of its idiosyncrasies, the price is certainly right on a Quickie.

• Affordable up-keep. It wouldn’t do us any good to own a plane if we couldn’t afford to fly, maintain, and house it properly.  As an A&P, I’m confident handling the whole ‘maintenance’ bit, but that still leaves the cost of parts. And unfortunately, that can come to a very hefty bill on a certified aircraft like a Cessna. With an experimental like the Q-2, the list of suitable parts becomes much wider. Also unlike Cessnas, Quickies are remarkably efficient little planes when it comes to fuel.  And finally, with a Q-2 we have the option to keep it at home for the low low price of free (although that’s not even close to an ideal situation).

• Experimental status. I’ve always been a bit of a tinkerer, which probably explains how I wound up as an engineer.  A homebuilt is eligible for “builder modifications” which allows us to make changes to the aircraft as we see fit (though the intent is to keep those very limited in scope). Completing a homebuilt is also a requirement for becoming an EAA Technical Counselor, which has been a goal of mine for some time, and while it’s true that we initially started our search looking for a completed build, having my name on the data plate would help towards that end.  Hard to advise somebody on their build without having completed one of your own, after all.

• Meg likes them. A lot.

The Long EZs were out of our budget, so she had to settle for second best, I suppose.  Poor thing!

All joking aside though, this was not an insignificant part of our decision process.  Whatever we ended up with, it would be a lengthy, expensive, and at times immensely frustrating journey.  The benefit of having your partner on board from the word ‘go’ (willingly!) cannot be overstated. (There’s also a funny story coming up soon about THAT particular topic!)

And so the search began.  Almost immediately, one odd-ball listing jumped out at us.  The first sign of weirdness was the fact that it was found on Craigslist, where no respectable plane should ever be found.  Our conversation about this potential buy already had a whiff of…something.  Well, see for yourself:

If I sounded at all apprehensive, it’s because I absolutely was.  Secondhand homebuilts can be a wonderful thing.  They can also be impending disasters wrapped in pretty skins, and this thing had ‘disaster’ written all over it.  I already knew what was most likely waiting for us in Georgia.  But we were free for the weekend, and Meg wanted to go. If nothing else, I could practice my aircraft pre-purchase inspection skills. So we brushed up on some reading material on the subject in order to prepare for our trip:

Armed with a little bit of knowledge and high hopes, we set a date to go look at our first potential Q-2 purchase. The results were, shall we say, less than encouraging…

Spoiler alert: algae growing in a puddle of standing water is NOT something you want to find inside an airplane.

I could go on for days about the sad hilarity that N433BZ provided, from the complete lack of paperwork, possibly defunct engine, “missing” bill of sale connecting the current owners to the builder, or the fact that it’d been abandoned to the outdoor elements for over ten years…but I think I’ll just let the picture speak for me instead.  For all the gruesome details, you can peruse the album on Quickheads. Don’t say I didn’t warn you.

Needless to say, with a $10,000 asking price, no paperwork, and a story with more holes in it than Swiss cheese, we passed on the unfortunate derelict that was Bravo Zulu. Maybe it ended its days lucky enough to serve as a pole model somewhere…but my gut says ‘probably not.’

Learning Curves

The famous brown welcome gates at AirVenture

For me, it all started in Oshkosh.

I’d never been particularly interested in aviation at all.  As far as I was concerned, flight was more or less restricted to the giant silver Greyhounds in the sky…and they were about as exciting as mud.  Sure, there were smaller planes that could constantly be heard buzzing like horseflies above our house in rural Illinois, but I never really gave them much thought.  They were like trees, rocks, cars or birds.  They just were.  I regarded them in the same manner as I did anthills.  They were cool to watch for a while, but they got pretty boring in relatively short order.

When I first got reconnected with Michael, his untamed passion for all things flying immediately stuck out to me.  He’d methodically spent the majority of his adolescence and young adulthood delving deeper into aviation, one step at a time.  Listening to him speak about general aviation was a fascinating insight into his world.  As much as he would deny it, he’s physically incapable of talking about flying stuff without a boyish enthusiasm creeping into his voice.  I found that level of excitement about his chosen field to be a bit contagious.

When he invited me up to Oshkosh with him, I’ll admit that I found the prospect to be a bit daunting.  He wanted me to camp in an airport in Wisconsin and look at planes?  For a full week?  I immediately came up with about sixteen million other vacation destinations I’d rather go to for our first getaway together, but his excitement was palpable.  If nothing else, I was curious to see what all the hulabaloo was about.  Besides, I like camping, it presented interesting subjects to practice my photography on, and most importantly…I got to spend a full week with my favorite engineer.

The first thing that struck me about Airventure was the sheer amount of people that were crammed into the area.  There were thousands of tents, campers, trailers and trucks in every direction that you looked.  We got our camp set up in relatively short order, and then Michael escorted me to the coolest thing I’d ever seen in my life.

Thousands upon thousands of planes…of every make, model, specification and odd-ball variety.  High wings, low wings, homebuilt, warbirds, ultralights and more, as far as the eye could see.  I almost didn’t know where to look.

I can’t say that I remember at exactly what moment the Q2 caught my eye, but I remember stumbling upon several of them parked in a neat line somewhere around day four.  They were weird looking.  No other plane I’d seen thus far had wheels on the bottom of their wings.  Who does that?

The next day, I had the distinct pleasure of watching one get marshalled in to join its kin.  They looked even stranger in motion than they did standing still.  For some reason, I found myself inexorably drawn to the little weirdo planes.  I spent the next few days learning as much about them as I could.  Suddenly I found myself actually interested in the differences in performance between the RevMaster 74hp engines and the O200 continentals.

Oh God…what was I becoming?

At the time, I had no way of knowing that we’d end up bringing one home three years later.  But, as with most tales, very few things go right the first time you try to do something.  The story of how we found our new pet project is no different.

Really, it all started with an email and an impromptu trip to Atlanta.

Diving Headfirst into Air

So we bought an airplane.

…Or a pile of various parts resembling an airplane, anyway.  After a lifetime of progressing through all things aviation-related, I suppose it was bound to happen eventually.  But like all dreams, this one was a few years in the making.  Of course, it helps when your significant other is equally, and sometimes more excited than you are to start the journey.

So here it is, our first step towards slipping the surly bonds of Earth in a machine of (somewhat) our own creation, hurtling ourselves into the literal and figurative unknown like the aviation founding fathers before us…with just our little Q.  Plus two.