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  1. BBerson

    Scale sandwich composite Honda jet build condensed to 14 minutes

    I wonder what he used for skin and core?
  2. BBerson

    Three cylinder VW

    Suppose instead of cutting a VW in half I just removed one cylinder to make three cylinder? Has anyone ever run a flat four on just three cylinders? How bad is the vibration at say 2500 rpm max? What if some special balance work was done with the crankshaft? An 1835cc VW missing one cylinder...
  3. BBerson

    Book about the Disastrous British airship industry

    I am halfway into this non-fiction history book about the socialist government that built the worlds largest airship without any experienced designers or workers. It was two years behind schedule, of course, and 20 tons over weight and could barely fly. So they launched from London to India...
  4. BBerson

    CriCri twin tractor prop configuration

    Has any other low wing design used the CriCri twin engine arrangement off the fuselage? I can’t think of any. The CriCri looks ok, but the high wing twin Piper Tripacer looks ugly. The CriCri takes advantage of small props blasting in the clear zone on each side. This has merit, I think...
  5. BBerson

    Coupling two one cylinder engines to make a twin?

    My question is how to couple two one cylinder Briggs engines to make one reliable aviation two cylinder engine? Or two V-2 engines to make a V-4? Specifically, how to couple the crankshaft to transfer the full loads and possible torsional vibrations. I considered various couplers. I think...
  6. BBerson

    IFR defined at airport?

    I need the legal definition of IFR at my airport Airports - Jefferson County International | WSDOT. The AWOS 3 reports visibility and clouds and fog. I determined from the chart, the airport is class G at surface. And class E at 700 feet above the runway (maybe 1200?). Based on magenta band...
  7. BBerson

    Flight review ramp check?

    Has anyone had a pilot ramp check in the last two years?, and asked for documentation of flight review? And how did you comply? A)Logbooks in airplane? (not required) B)Copy of flight review page kept in airplane? C)No documents at airplane, so offered to mail in? D)Did not find any log records...
  8. BBerson

    Sidecar ultralight instruction

    I think the majority of ultralight buyers already have a pilot certificate but could use a couple dual instruction hops. I have an idea for this. Essentially, the idea is to install a “sidecar” with a wheel on my ultralight for the instructor/owner to sit in. The sidecar would hinge down as the...
  9. BBerson

    100 hour EA-B kit?

    How is it possible to sell a 100 hour kit and comply with the major portion rule? I am aware of the FAA kit checklist, but this seems far beyond what was in the past. Are the rules quietly evolving? It doesn’t say EA-B in the article. But I assume it is because of the 40 hour fly off time...
  10. BBerson

    Wind turbines falling

    Not aviation, but perhaps very similar to Boeing 737 Max, with quality control problems resulting in total failure. https://www.bloomberg.com/news/articles/2023-01-23/wind-turbine-collapses-punctuate-green-power-growing-pains
  11. BBerson

    Is EAA forum dead?

    Virtually no comment on EAA forum about warbird airshow crash. https://eaaforums.org/showthread.php?10401-Horrific-Dallas-CAF-airshow-crash-B-17-and-AirCobra
  12. BBerson

    Sportplane Type Certificate

    Has anyone heard of the Sportplane Type Certificate of 1993?
  13. BBerson

    DC vs AC Rated Switches

    I was reading about failed switches in Sport Aviation archives. The author said four out of five sport planes use AC switches instead of proper DC switches and the AC switches will weld the contacts.
  14. BBerson

    Same article

    KITPLANES and Sport Aviation both ran the same Vic Syracuse article with different titles. That's a big publishing oopsie. https://www.kitplanes.com/the-case-of-the-missing-propeller/
  15. BBerson

    Arlington 2021 Fly-in (drive in ?)

    Anyone know what a fly-in drive- in is? https://www.arlingtonflyin.org/
  16. BBerson

    Transition to Unfamilar Aircraft

    53 page guide to transition from standard trainers to unusual aircraft. Also numerous accident cases. https://www.faa.gov/documentLibrary/media/Advisory_Circular/AC_90-109A.pdf
  17. BBerson

    EAA Chapter membership

    I know EAA requires all chapter members also be members of EAA National. Are there any EAA chapters that offer exemptions to the rule or don't enforce the rule? Such as non-voting associate membership or something?
  18. BBerson

    Hybrid or electric theory?

    Moving toward hybrid: https://www.avweb.com/multimedia/avweb-vodcast-why-electric-airplane-designers-are-turning-to-hybrid-drives/?MailingID=490
  19. BBerson

    Welding crankshaft warpage?

    Does welding the internal counterweights on a half VW crankshaft cause any noticeable misalignment of the main bearings?
  20. BBerson

    Solid Rivet shop head size criteria

    The usual recommendation for the shop head is to use a rivet that extends 1.5 times the diameter. See here:How to select the correct rivet size atlascopco But it's much easier to drive when the rivet is less than that recommended 1.5 times the diameter. I don't see how it would make too much...
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