Source: 2023Q3 Beartracks, Jared Yates
As we know, the Bearhawks (especially the 4-Place and Five) are heavy on the tail when parked. The main wheels sit somewhat forward, so it is very difficult to nose over with a Bearhawk, but the heavy tail is a tradeoff. One Bearhawker years ago told me that he would clean, inspect, and lube his tailwheel assembly every 50 hours. This may be appropriate depending on how the airplane is operated. I try to stick to a schedule of every year or 50 hours depending on which comes first.
Two days before we were to leave for Oshkosh, (isn’t it always?) I noticed that our tailwheel was not locking and unlocking very freely. It turns out that an insect had made a nest inside the tube where the locking pin resides. There was just enough room in the area occupied by the spring, but once we started steering, the nest was broken up and the dirt dispersed in that tube. It didn’t take long for the loose dirt to jam the pin in the locked position. This isn’t a big problem to fix, but it required removing the hex-head screw that connects the locking pin to the bushing that rides on the unlocking cam. When I went to remove it, that little screw snapped off. You can see the results in the lower part of the picture below.

This was not optimal. I knew that Eric Newton at Bearhawk Tailwheels would be happy to sell me a replacement locking pin and screw, but that would take a few days. I used to keep a spare of each, but hadn’t thought to resupply those spares since the fire. If we were going to fly to Oshkosh, I’d have to make new ones. I started with a long grade 5 zinc plated bolt from the hardware store, which had a nice unthreaded shank section. The first step was to drill a new hole to receive the screw. With a milling machine this would be an easy step, but with hand alignment it took two tries to get an acceptably-located hole. The hole needs to be centered, and I found that grinding a tiny flat spot gave the center punch, and subsequent drill bit, a little landing pad. Not having anything like the original screw, I used an AN-3 bolt, so I tapped the hole for fine threads. Once the hole was threaded, I cut the new pin to length and deburred the edges. The next problem was the bushing. I found that a stack of three AN washers looked just about right, and worked great. I added just a little thread locker to the AN bolt, and worked some grease in to keep the pin moving freely. Once it was all back together, I packed the locking pin tubing with grease so that the next insect wouldn’t find it to be an attractive housing vacancy. While it was an inconvenience to have to make the new parts on short notice, I’m thankful that we found the problem at home and not while trying to maneuver in the campground or at a fuel stop while on the trip.

Spar Repair Notes

Bob has provided this drawing for repairing certain types of wing spar damage. Experience shows that when wing spars are bent, the damage is often near the tip, right at the outboard end of the cap strips. This drawing applies to those types of situations. The idea is that the spar web material will be spliced at a point that is 8 rivets inboard of the cap strip end. This means removing 16 rivets on the top and 16 on the bottom. Cut the damaged spar web at the splice line and debur the edge. The new spar web material will need to match the old. In the case of factory spars, Bearhawk Aircraft is able to supply a matching piece of spar web material. For a scratch build, bend the new web to match the airplane. There is a doubler on the front and back of the splice. The doubler fits between the cap strips. If the splice line occurs in an area where there is no cap strip. The doubler should be full height (Labeled “X” in the drawing). Naturally this doesn’t cover every possible type of spar damage, just one of the most common. If in doubt with any repair, consult Bob.
Quick Tip: Throwing in the Towel to keep things from rolling back
Source: 2018 Q2 Beartracks, Russ Erb
An ongoing problem while building or inspecting under the floor panels is dropped screws, tools, or whatevers that go sliding down the inside of the fabric covering, pulled by the unrelenting force of gravity until they finally reach a location hidden and unreachable by human hands. It seemed that at every annual condition inspection I would find some random piece of hardware back by the tail wheel mount that I hadn’t seen since the previous year’s inspection.
This picture shows one reasonably effective and simple solution that I have found. Simply stuff a towel under the structure against the fabric. The towel does a very good job (if not perfect) of stopping any wayward items before they can disappear into the tail cone. Just be sure to remove the towel before you replace the floor panels.

Rex Ervin’s Bearhawk, Part 2: The Ground Loop
Source: 2015 Q2 Beartracks, Rex Ervin
My wife and a grown son and I attended the Super Cub fly-in at Johnson Creek, on June 17-21 this year. My son and I usually attend with our Super Cub L-21B. This year we took the Bearhawk plus mom. The weather was good and we enjoyed fly-outs to Sulphur Creek Ranch, Flying B Ranch, and Big Creek. There was a record attendance with 161 airplanes (too many).
The weather prediction for Sunday, June 21 at our home in Klamath Falls, Oregon was calling for strong gusty southwest winds of 15-25 mph after 1:00pm. We decided not to do one more fly out and headed for home Sunday at 8:10am and flew direct to Klamath Falls. We arrived home at 11:10am. The wind at the airport (KLMT) was west at 10-21 mph. Our farm strip is 5 miles southeast of KLMT. The wind there was light out of the southwest. The last half hour of our flight was in very turbulent, unstable air. The air was that way in our local area when we arrived. I decided to land at our home strip since the wind seemed OK there. Our strip is 32/14, 2400 feet of sod at 4100 foot elevation. I set up for a left hand pattern with a one mile final to get stabilized in the rough air, landing to the southeast. I did not need crosswind correction on final or at touchdown. We rolled out about half way, then we were hit with a strong quartering tailwind from the right. I was unable to maintain directional control and we made a big swerve to the left and ended up pointing northwest. The right gear folded under the fuselage, right wing bent at strut attachment, right horizontal stabilizer and elevator damaged, sudden engine stop-page, and one prop blade bent forward slightly. When we got out of the airplane the midfield windsock was almost straight out from about a 15 mph wind from the northwest. For the next hour or so the wind switched back and forth from northwest to west to southwest and back. It finally settled on northwest at 10-15 mph. I think we got caught in an air mass shift from southwest to northwest during the wrong time. I am going to put windsocks at each end of the runway. That might have helped us that day. I have never been so heart-broken as I was when we crunched to a stop!
Good news, my insurance company (Avemco) is going to pay for all repairs at the factory-recommended repair shop which Mark referred me to. It is Sills Aviation, close to Mark’s ranch. Joseph Sills has done other Bearhawk and Bearhawk Patrol repairs and knows the design. Mark assures me that he is an excellent craftsman. Avemco will pay for professional transport of my airplane to Sills Aviation, plus get me an airline ticket when the time comes to get it, and also for gas and expenses to bring it home. The insurance adjuster is from an independent adjusting company that works for several aviation insurance companies. She said Avemco is the best one. They won’t drop you because of age or for having an accident, and won’t raise rates excessively due to an accident. I hope this narrative is helpful to at least some of you.

Lifting the Tail
Source: 2014 Q1 Beartracks, Russ Erb
One of the long unresolved issues I have had with Three Sigma was a suitable method to raise the tail, whether it be to change the tail wheel tire or level the fuselage for weight and balance. With a force on the tail of 164 pounds in the level attitude and even more when it is on the ground, it’s not something I can lift by myself. One method that does work is to get about four guys to stand around the tail and lift together, but this has several other problems, the biggest being scheduling. To do the initial weight and balance, I hooked a shop crane to the tail wheel yoke, but this required disconnecting the tail wheel springs to move the rudder out of the way. That’s not as bad, but my current hangar configuration doesn’t have room for that. Trying to hook the shop crane to the side handles would not work because of interference with the sides of the fuselage.
Now I have created a fixture that seems to address all of these problems. This is simply a piece of 2″x2″x0.063″ steel tube, of the type I used for building jigs. It is drilled to accept extended length U-bolts, McMaster-Carr part number 8880T44. Four U-bolts are used to clamp to the fuselage handles. I used two Ubolts on each handle rather than one because I reasoned that two would minimize any rocking of the lifting fixture. One more U-bolt is used for attaching the shop crane for lifting. I use a shackle between the U-bolt and the crane hook now because the hook fits better.
Of interest is the buckling in the fabric shown just above the fuselage handle. This is due to the slight bending of the longeron because the front of the handle is not at a cluster. This goes away when the load is removed. Now I can raise the tail under control to any required height by myself at any time.
Emergency Field Tire Repair
Source: 2013 Q4 Beartracks, Pat Fagan
Carol and I flew to Lynn Rigg’s Kanab Bearhawk fly-in in October. What a great time we had. It was a small turnout, but of course it was Bearhawk quality people so we had an absolute blast. Lynn hopes to put this on every year and we will certainly plan to attend next year.
On the way home, Scott Williamson and Kevin Deutscher in #509 wanted to hit a backcountry strip. Grand Gulch Mine in AZ was roughly on the way for both of us so we popped in there. Carol and I landed first and it was while maneuvering the airplane to the side of the x-wind strip I discovered we had flatted our tail wheel. I used to carry a complete tail wheel assembly, patch kit, tubes, jack and air pump when out doing this sort of thing, but it’s been a while since I’ve done this sort of thing and I didn’t have anything in the airplane other than a badly assembled tool kit.
We walked down to check out the mine anyway, and on the way back Kevin “McGyver” had a brilliant idea. Since the tail wheel is two wheel halves, why not pack the tire with what ever we could find then bolt the two halves back together. We managed to get enough tools together between my and Scott’s tool kits to get the tire apart. There was an abrasion on the side of the tube about the size of a quarter that looked like the likely suspect. What I was surprised to discover later was that there was a matching abraded patch on the inside of the tire. The chords were worn through and I could almost push my finger through the sidewall. Perhaps the tire was damaged in the wreck 4 years ago which then abraded the tube. Who knows.
We stripped a couple of pillow cases, twined them tightly together, than wrapped the whole sausage with tie down rope. After jamming this log into the tire we bolted the halves back together and had ourselves a serviceable tail wheel. We pushed the plane onto the runway and picked up the tail to align it with the runway to keep from putting any side load on the tire. After a soft field departure, we were on our way home. Back home I wheel landed near my hanger, braking with the tail in the air until the taxi turnoff. I then taxied about 100 yards to our hangar with the tail wheel thumping, but not riding on the rim.
Moral of the story, if you’re going to play in the backcountry, bring a proper tool kit, repair parts, and an out of-the box thinker like Kevin. What a great weekend.

Pat Fagan Repair Updates
Source: 2012 Q4 Beartracks, Pat Fagan
Why in the heck is it taking so darn long to get Smokey Bearhawk back in the air? A better question would be how did we ever complete it in the first place? I don’t know where the time came from to build the thing originally.
Granted, the first time around the airplane was an all consuming priority. This time around, it’s not, having to share time with other projects and interests, but still. It’s going on four years for crying out loud. I’ve been asked to provide an update on how the rebuild is going and identify some of the repairs and modifications.
I began the rebuild with the fuselage for a couple of reasons. First, it was the saddest looking part of what was once a great machine. I couldn’t stand to look at it, bent and twisted and covered with dust, not to mention it was just in the way. The second reason is I still recall how tedious it was to build the wings, and since the right wing was essentially destroyed, I wanted to put off dealing with that headache for as long as possible.
When I finished the fuselage I asked myself the same question with which I opened this article. Why has this taken so long? To help determine that I made an itemized list of everything I had done. It turned out to be quite an extensive list, which I can no longer locate. I’ll try to dredge up some of that memory.
Both main landing gear legs where ripped off. Significant damage was imparted to both lower longerons. Damage was caused by the steps, which were welded to the longerons. The steps didn’t break off but rather twisted. Support tubing designed to triangulate the step attachment then broadcast forces into all the surrounding structure. Lesson learned, the Avipro step located on the landing gear leg is a much better idea.
I spent a considerable amount of time scratching my head trying to figure out how to replace the damaged longerons
yet save everything else. I finally realized that the truly simplest solution would be to replace everything from aft of station “A” to aft of station “E”, including all the structure at station “C”. Once that was done, I bought a pair of Avipro landing gear to speed things up (laugh). I fit new gear fittings to the new gear legs, but had to modify the new shock strut lower ends to better fit with the angle of my upper strut attach fitting.
While doing these frame repairs I incorporated the tubing changes necessary to allow for float operations. I also installed rear float fittings and pulley brackets for water rudder cables. I don’t know that I will ever put the plane on floats, but I regretted not having at least done the mods in the first place, so didn’t want to make the same mistake twice.
At the tail it was necessary to replace some of the tail post and lower longerons. Again, I finally found it easier to just cut everything out and begin new and straight so I scarfed in new longerons from ahead of the horizontal tail forward attach point back to the tail post.
In the six years we flew Smokey I developed a list of items I felt would be nice to change, so once the plane was rolling around on a straight frame again I set about working on that list. Some of those items include:
- Welding tabs to the sides of the rudder pedals to prevent feet from sliding off.
- Incorporating a remote control to allow changing the fuel selector without having to reach to the floor.
- Inertial reel two point shoulder harnesses for front seat occupants.
- Removable co-pilot control stick.
- Avipro style front seat adjustment controls.
- Flap handle located on the ceiling to eliminate reaching to the floor to operate it.
- Battery moved from behind the baggage compartment to passenger side of the firewall.
- Modifications to the area behind the baggage compartment to allow large items to be placed there while the plane is parked. I also incorporated a warning light to remind me to remove those items prior to flight.
- Refined the string “hammock” behind the baggage compartment where we stowed light but bulky items like sleeping bags and pillows for flight.
- Made the baggage compartment panel into a fold down table for those times when it was necessary to eat and sleep in the airplane.
- Modified all the tail surfaces with Patrol style contoured ribs.
- Eliminated the trim tab torque tubes and push rods. Instead I installed push pull cables to operate the tabs, which eliminates the trim tab servo action.
- Modified the trim tabs to the new, smaller design.
- Modified the horizontal tail struts with an adjustable clevis attachment.
- Added the beefed up tube to the axles.
There’s probably a lot more, but that should give you an idea where the time has gone. So, back to those wings. I wanted to install long range fuel tanks. The easiest way to incorporate the new plumbing was to remove the skins, which was necessary anyway since I wanted to eliminate the washout I had inadvertently built into the wings originally.
The time of reckoning with the right wing finally came. I was pleasantly surprised to discover that the tools and skills I’ve acquired since I built the wings the first time made making parts this time such a joy that I chose to remake almost everything. I reused perhaps half of the center ribs and half of the nose ribs, but everything else is new. The right wing has been built to the new beefed up wing plans and is ready to be skinned. I feel fairly certain we will be back in the air, finally, by the end of next year, and we look forward to getting back to visiting all of our Bearhawk friends again in Smokey.

Smokey Goes to Washington
Source: 2006 Q3 Beartracks, Pat and Carol Fagan
As you recall from our previous episode, Smokey suffered some wing damage in Arizona when a freak wind yanked it loose from its tie-down. At first glance, a speedy repair seemed out of the question and it looked like Carol’s and my plans for a flying summer were ‘crunched’, so to speak. Much to my surprise and delight, once we got the wing opened up the damage was easily repairable. With some determination, it looked like we could get the plane repaired and back in the air in time for us to attend the EAA air show at Arlington, as previously planned.
The benefits of being a plans builder really shone forth during the repair. The tail portion of the end rib took a beating and had to be sacrificed, but I had the material, form block, and knowledge to fashion a new one that I attached to the rib. The wing tip needed extensive fiberglass repair, but again I had the materials and paint on hand. Once the offending bulges were eased out of the spars, the wing skins riveted right back in place. There was no need to repaint the wing at all.
In fact, the entire cost of repair amounted to about $10, mainly for a new decal for the wing tip. I realize how fortunate it was the tie-down held enough to keep the plane from flipping and rolling into a ball. I consider it a life lesson learned.
We got the plane back in the air a week before the Arlington started. It flew beautifully, but the trim wasn’t quite right. I had to take the tail off to get the fuselage into the truck to bring it home and in putting it back together something had changed. I landed, made an adjustment and went back up for another test. That was better, but still not as I remembered it. After another adjustment I went up again and this time my hands did all the motor memory movements that I have come to recognize in the 500+ hours I now have in the airplane. That was obviously the sweet spot.
We spent the night in Chico, CA. with my uncle, who has never, and will never, go up in an airplane. He was a lawyer and retired as a municipal judge. As such, he has a remarkable ability to phrase things in such a way that he can say one thing, which means something completely different, and yet not be lying. For instance, we needed fuel. I asked him if he would like to taxi over to the fuel pit with me. After assurances that I wouldn’t spirit him into the air, he agreed and climbed into the plane. After our 100 yard taxi, he commented “Now I can tell people I’ve been in a small plane.” True, and yet?
The next morning, our plans for a non-stop flight to Arlington were altered by a solid cloud bank towards the coast that extended clear into Washington. After diverting to Redmond for fuel and a weather check we elected to duck into the Columbia Gorge to come in under the weather. Redmond is cool. There are two FBO’s on opposite sides of the field that compete for your business. We opted for the west side of the field and had an attendant guide us to a parking spot. As he was rolling out the red carpet, I asked where the self-serve fuel was. He pointed over behind the hanger, rolled up his carpet and left.
We arrived at Arlington about 1 hour before airport closure for the afternoon air show. After a quick check-in with Budd and the Bearhawk boys, we proceeded to unload our stuff. That is quite a sight for those who witness it, and yet, we still always manage to take home more stuff than we came with. It was cold and damp that first day and we thought we would be buying heavy clothes, but the next few days were warm and sunny. Perfect.
We planned to head for home on Sunday, before the airport closure, but with all the good byes, we were cutting it pretty close. I also failed to realize that departures were stopped 15 minutes prior to airport closure to facilitate arrivals.
We taxied like mad, and it looked like we would miss our window. Luckily, the tower thought we were the Bearhawk demonstrator and they cleared us for takeoff.
We flew up close and personal to Mt. St. Helens. What a beautiful sight. Spirit Lake, on the devastated north side of the mountain is clogged with a mile long raft of downed logs. It is also humbling to see all the blow-down trees, still perfectly aligned where they fell. The bulge in the crater was smoking and we hoped it would behave until we were far, far away. It is so nice to have Smokey healthy again.

Giant Rock- Pat Fagan
2006 Q2 Beartracks, Pat Fagan
In an isolated corner of the Mojave Desert you will find a truly “out of this world” destination. Giant Rock Airport was once the gathering place of UFO enthusiasts from around the world, and allegedly, visitors from beyond this world as well.
Getting There Continue reading
