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  1. V

    "We just hit a Drone!" | Windshield Damaged on United B737 MAX at SFO

    I find many of the replies regarding model aircraft to be somewhat amusing; here you have a bunch of people who are either building or flying full sized aircraft complaining about the cost of model aircraft. If you can afford a full scale airplane, affording a model airplane should not be a...
  2. V

    Another dreamer

    I believe that Team will be closing its doors soon, I saw something to that effect posted in FB or in the lonesome buzzards website. You may want to check with Dave (theCoop) if kits will still be available within the timeframe you are interested in.
  3. V

    Crashes in the News - Thread

    Just in case people are not aware of what happen over Palmdale many years ago..
  4. V

    Crashes in the News - Thread

    Unfortunately, that is not the only incident involving Peru. Years before, a SU-22 shot at an un-marked US C-130 on a Elint mission off the Peruvian coast. The C-130 made an emergency landing but unfortunately one of the crew members passed.
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    Crashes in the News - Thread

    Had not thought about that, but since they were travelling with a little one I suspect that the nanny would have been awake, in a way, she was on duty.
  6. V

    Crashes in the News - Thread

    Not a fan of Gryder, in one of his reports he talks about the crash of a homebuilt and does not even get the make and model right. Not the most reliable source out there. Regardless of what he said, the passengers would have been aware of their estimated arrival time and would have been...
  7. V

    Why aren't Lyco and Conti pursuing the 100 hp market?

    Probably will get skewered for saying this but I suspect that smaller personal aircraft will be some of the first to transition to electric.
  8. V

    Shoulder Belts on a Baby Ace

    For the guide loop which carries the shoulder belt it would be probably better if it aligned with the general direction of the belt (from the first set of photos in the first page). The way it is mounted it well bend forward when a load is applied. This is turn will also put a bending moment...
  9. V

    Wing attach bolts in tension

    Interesting discussion. Looking at the first photo posted of the Cassutt it appears to me that the bolts clamp down on what appears to be a wooden spar. In order to develop significant preloads on the bolts the spar would need to have some kind of metal insert which I suspect it does not. Given...
  10. V

    Boeing following Mac Doug

    Nice response. I work for one of the larger automakers we have had good luck attracting engineers who are interested in autonomous vehicles and electrification. We have several Boeing transplants and a few other that came from the defense industry as well (think radars and sensors). My...
  11. V

    PIK-26

    There is a FB group which might be able to help you. You can always post the question in English although the primary language for the group is Spanish. I imagine that a few of the members might be fluent in English. https://www.facebook.com/groups/1379845792225146/ Within these forums I...
  12. V

    Crashes in the News - Thread

    With everything that was going on I was impressed by the controller who remained calm and acted professionally. Very unfortunate circumstance.
  13. V

    Crashes in the News - Thread

    Their crash was a major bummer. I had watched some of their videos and he used to post on occasion on the Pietenpol FB page. Seemed like a really nice couple; he was also a pretty talented musician as well. The had put up the Piet for sale to help fund the purchase of their next plane which...
  14. V

    Volksplane VP-2 Mk2 wing project

    I was just teasing. The design looks nice, reminds me of a large model airplane.
  15. V

    Volksplane VP-2 Mk2 wing project

    Hmmmm...So who will assume test piloting duties?
  16. V

    Improving the Volksplane shoulder harness

    I have seen the failure mode which SVSU Steve made reference to in a couple of mini-max crashes. In essence, the airplanes broke their backs just behind the pilot's seat. In the case of the MiniMax, the rear portion of the fuselage becomes an open truss (limited plywood covering) rearward of...
  17. V

    Improving the Volksplane shoulder harness

    I just took a quick look at some of the data that I have and for a vehicle crash at about 27 G's, the shoulder belt tension is in the order of about 1800 lbs or so. The lap belt loads are about 750 lbs at each anchor. Keep in mind that automobiles use load limiters on the belt systems to...
  18. V

    Why don't we have an Electric Ultralight Area?

    I think that maybe in another few years battery technology will be to the point which it will be possible to fly an ultralight aircraft for an hour or so. Using the numbers provided for the Yuneec, assuming that the 70 amp hour battery provides about 70 volts: 1 hour discharge: 4900 W...
  19. V

    Cub style gear: How do I FEA model this?

    Hello again, I was using the IPAD last night to type in a response and hence the brevity. I think that finding the solution by hand would be fairly simple: 1) Draw an arc for the wheel axle as it pivots about the fuselage 2) Pick a point along that arc which satisfies your wheel travel at...
  20. V

    Cub style gear: How do I FEA model this?

    Depending on the deflections you are expecting this problem may not be within the scope of a linear code. Large deflections add terms to the stiffness matrix which linear codes cannot handle easily. ANsys, dyna or abaqus can handle it, but it is overkill. If you want to get a rough estimate...
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