Tuesday, October 26, 2021

 Friends, there's some honesty buried in here as it relates to experimental aircraft. Read it all and share freely.

Squawk & Resolutions on N318KW
  1. Brake Pedals in-op. Resolution: add 1" spacer to brake pedal. Permanent solution; works well.
  2. One of the tires is low on air. Resolution: add air.
  3. Right brake in-op. Resolution: bleed brakes.
  4. Right brake still in-op, next day. Resolution: bleed brakes using the correct procedure after reviewing youtube video on the topic.
  5. Brake line leaks: Resolution: tighten fittings.
  6. Braking action still poor: Resolution: brake fluid probably on brake pads / discs. Use brakes to refinish pads. Braking action now OK. Note: I have dual caliper brakes and they are mandatory for large tires. A single caliper brake wouldn't work.
  7. Elevator range of motion incorrect. Resolution: adjust all fittings so that up and down are balanced. There are several points of adjustment affecting this from the push-pull fittings, the location of the push-pull collars, inside-cabin adjustments, etc.
  8. One of the tires is low on air. Resolution: add air.
  9. Discovered critical bolt installed upside down in elevator reverser fitting. Bolt also was loose with standard hex nut. Loss of bolt would cause loss of control. Resolution: install bolt correctly, with nyLoc nut. Death averted. Question: how did everyone miss this?
  10. On first flight, aircraft rolls left tendency. Resolution: adjust stick position via pushrod to aileron mixer.
  11. On first flight, aircraft has heavy elevator response. Resolution: add fixed trim tabs to elevator. Final resolution: in-flight adjustable elevator trim tab.
  12. In cruise, aircraft yaws left. Resolution: add trim tab to left aileron.
  13. On takeoff, quick application of full power causes aircraft to turn left REALLY QUICKLY. Resolutions: a) improve pilot skill b) don't do that c) resolve to use less powerful engine d) use full!!!!! right rudder. In the spirit of Draco, for crying out loud, your skill level needs to match the airplane and the powerplant. You can't jump into this airplane and expect it to fly you. You will have to fly it while taking off and even in ground roll, or you'll have an accident.
  14. Long main gear is chattering. Potential resolutions: add shock absorbers, and yes, I am planning to do this. Meanwhile, every landing is best performed to 3 point and full stall. Don't even consider a wheel landing. I will follow up with a builder alert after I install shock absorbers.
  15. Oil leak as evidenced by small puddle on floor of hangar. Resolution: temperature sensor was installed without teflon tape.
  16. Oil leak as evidenced by even smaller puddle on floor of hangar. Resolution: pressure sensor was installed without teflon tape.
  17. Airspeed Indicator possibly not functional at low airspeeds, due to high angle of attack. Resolution: smile and enjoy the slow airspeeds. Learn how to fly using butt feedback, not instrument feedback. This airplane will love you, if you give it the chance.
  18. Yaw oscillation in cruise. This happens only when: a) cruise speed b) feet not on rudder pedals c) turbulence. The plane will *slowly* start to yaw left and then right, kind of like an old fashioned v-tail bonanza. Resolution: a) keep feet on rudder pedals -or- b) add rudder tension spring. You may notice that in yesterday's video posted here, there was no evidence of this. Seriously, the rudder tension spring is the solution.
  19. Pitch oscillation in turbulence. This never happened in N3748, but I have seen some evidence here in N318KW. The reason is simple: the elevator on this plane is heavier, so that a gust acceleration upward causes the mass of the elevator to go downward. This is a precursor to flutter. Resolution: I will adding mass balance weights to the elevator. I will follow up with a builder alert on Chipper Builder.
  20. Out of an abundance of caution, I am planning to add vertical stabilizer flying wires, which N3748 had but N318KW does not. Resolution: add flying wires. I will follow up with a builder alert on Chipper Builder.
  21. Windshield cracked. Resolution: performed airworthy windshield repair. Longer term resolution: under thought now.
  22. One of the tires is low on air. Resolution: add air.
  23. Tailwheel steering in-op. Everything you see me doing to date has been done without any tailwheel steering whatsoever. I've gotten OK learning to feel the airplane, rudder, brakes, power and to taxi with confidence, without a steerable tailwheel. Resolution: need to install tailwheel steering.?!

Tuesday, October 19, 2021

Flaps, Fire, and Fatalities

 "Flaps, Fires and Fatalities, of sorts".

Fire burned our facility 2.5 years ago, destroying the business. Chipper 2 N318KW survived because it was out at the hangar, but the flap extensions were in-town. They were recovered from the fire debris and have been sitting around ever since. They are still covered with soot.
I want to tell you about installing them yesterday, but first I want to tell you a little more about the fire. Back up your calendar to June, 2019. Before Covid.
Kathy Wiebe and I had gone out to eat, it had been a great meal and a great date night, our Friday evening tradition We were sitting in bed, late on a Friday evening. It was normality. It was about 11:15 and my cell phone showed an incoming call.
"This is the Wichita Police Department... There's been a fire at your facility. Someone needs to come."
Kathy and I threw on clothes and rushed to our building. It was firefighting on full display; 20 emergency vehicles; firefighters walking around mopping up details; rolling hoses.

Eventually, I went to the back of the facility and talked with a fire commander. I think we discussed possible fire origin points (the stupid CNC dust collector, of course) and I thought about the irony that one of our CNC operators was a recently retired firefighter.
And then I thought about our shop cats. I asked the fireman whether they'd been seen. He motioned to the ground, directly by where we were standing. A lifeless body of a cat was on the ground. No motion. Sooted. Dead.
I broke into hacking sobs, tears.
Back to those flap extensions.
Yesterday, I installed them for the first time. I have chosen to fly with them, covered with soot, and who knows, I may never paint them. They are a reminder of what was, how I felt, and also how far from then to now I've come. They provide an entry point of discussion for anyone who looks at the airplane -- why are those dirty pieces of s*** attached to that gorgeous airframe? And then I can tell the story, of which this narrative is a small part.

Monday, October 18, 2021

First Flight of Chipper 2, N318KW!

I am so pleased to report that my airplane and design N318KW Chipper 2 had its first flight! All squawks and paperwork were cleared; taxi tests were just fine, along with successful high speed taxi tests.

Taking the runway after all the gliders had cleared for the day, and with flaps set in mid position, and just a dash of droop aileron dialed in, I smoothly advanced power on the ULPower 350iS 130HP engine. Before full power was really achieved, Chipper 2 was off the ground. I reduced power immediately.... and proceeded to float down the runway.... and it finally settled down back to the ground.
That's a wrap for the day. I am falling back in love with this airplane. It was smooth as silk and roomy on the inside, beautiful on the outside.


Wednesday, October 13, 2021

Is it possible for an Airspeed (ASI), Vertical Speed (VSI) and Altimeter, all in one Instrument?

How can I save money, time and panel space when shopping instruments for my airplane?  Can I get an Airspeed (ASI), Vertical Speed (VSI) and Altimeter, all in one?

The answer is yes. We're posting a short video on our Multi-Function Instrument, which combines all three functions into one brilliant lightweight display.  As I mention in the video, this instrument is superior because:

The speed ranges are customizable, including the green, yellow (caution) and red (redline) range for your airplane.  You can set it up in knots or MPH.  You also get a moving short term history of your airspeed, which is really useful for seeing how you're doing on your aircraft pitch stability.

Aircraft Spruce usually has it on sale. You can find it here:

BELITE RADIANT MFI (ASI / VSI / ALTITUDE) | Aircraft Spruce

and you can see our video, where I quickly describe its features, on Youtube:

https://youtu.be/ewE8S_NsP1Q