Recent content by Jimstix

Help Support

  1. Jimstix

    60 Years of Popular Mechanics saved from the dump

    Fritz, save the books. We may need them for a load test. :pilot:
  2. Jimstix

    Authentic Paint for WWII Mustangs / Restorations / Replicas

    I've never see a photo of pacific Mustangs (or Thunderbolts) with white bands between the large black bands on the wing or fuselage. The national insignia is always insignia blue Federal Standard 595 Fed-Std-595 Color Specification, Fan Deck, Paint Chips The images show a much lighter shade of...
  3. Jimstix

    New replica 1944 Hamilton-Standard prop

    Other than the prop, the biggest tell on the Dallas-built "K" and the Inglewood-built "D" is the canopy. The "K" has a slight outer mold line (OML) difference, the most visible of which is the bump at the back of the transparency.
  4. Jimstix

    Crashes in the News - Thread

    These CL-41's are equipped with Webber ejection seats. They are not zero-zero like the ACES II or M-B Mk 16 seats. The passenger seat goes first, then the pilot'seat. It is likely that the passenger got a partial chute and the pilot's chute was still streamered because of the decent rate and...
  5. Jimstix

    Spar cap material

    What about Marske pultruded carbon rods in lieu of the roving? Good properties easy to work with.
  6. Jimstix

    Whiffle tree question

    Your picture is an extreme example of a whiffletree loaded structure. Most homebuilt airplane structures cannot strain (deflect) to that degree. Your wooden structures will deflect under limit load, but much less than shown. Whiffletrees only approximate the air loading on the structure and...
  7. Jimstix

    Shoot My Plane Down.

    Dear Pilot 34, Ron's estimates are reasonable preliminary cost estimates for a project of this magnitude. Having done some engineering estimation, passed the PE exam, earned a living as an engineer for the past 40+ years, my money is on Ron being in the zone. Your efforts to turn a silk purse...
  8. Jimstix

    Very low aspect ratio planes?

    Great find! Those old reports from the NACA are works of art.
  9. Jimstix

    Very low aspect ratio planes?

    The Convair B-58, F-102, and F-106 all had a type of washout that they called "conical camber" along the leading edges. It is difficult to describe, but easy to see if you stand at the tip and look along the leading edge toward the root. The underside of the leading edge forms the surface of...
  10. Jimstix

    Very low aspect ratio planes?

    Using a vortex to increase the Cl requires high angle of attack and a big increase in power. Most light planes and all LSA’s are short of extra horsepower, so taking advantage of vortex lift is an invitation to visit the back side of the power curve.
  11. Jimstix

    Boeing - Design Issues...

    I know that I'm frustrated with politicians as are you. But if we keep sending back the same bad actors every other November, they won't change. Vote YOUR self interests, not somebody else's. Jim
  12. Jimstix

    Very low aspect ratio planes?

    Full disclosure – I love goofy, weird airplanes with bookshelfs to prove it. Low-aspect-ratio (LAR) wings just have no real place on non-goofy general aviation airplanes. Sure, there are structural advantages and “look what I built” pride of the builder. However, these are not compelling...
  13. Jimstix

    Boeing - Design Issues...

    I think that we can all agree that the current corporate cannibalism of America is, shall we say, not a good thing. However, I have a solution: Vote for politicians that won’t take money from Wall Street or PACs and vote out those that do. All politicians in America need to be told over and...
  14. Jimstix

    Very low aspect ratio planes?

    BTW, a huge selection of low aspect ratio airplanes have been modeled as "Peanut" scale (13" wingspan) rubber-powered free flight-models. A vast selection can be found at Oz : Free plans : Collection of free vintage model aircraft plans to download . A large number of them were designed and...
  15. Jimstix

    No one can explain WHY planes fly...

    Instead of Bernoulli, lets talk Newton, more to the point let’s quote him and say Force = mass x acceleration. Lift is the force that hold airplanes in the sky, so what are the mass and acceleration needed to do that? The best way I’ve found to explain lift from an airplane wing is to get a...