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  1. jsharp

    A new player has entered the chat.

    No disagreement here with any of your comments. You are right, there are other options out there with more proven components and performance. May of those engines now used in the experimental space, started out the same way as an idea, a what if, and a cheap commercial engine full of junk parts...
  2. jsharp

    A new player has entered the chat.

    I believe that DuroMax is carbureted, and not fuel injected. It does have an electronic throttle speed control device mounted on the side of the carburetor where you would normally connect a throttle cable. RedBeard that posted the YouTube video that is referenced, stated that he identified a...
  3. jsharp

    "SkyWing" hybrid wing body ultralight

    I believe in pushing the envelope on aviation design and construction. After all, its in our nature to do so however, we must always remember that this is still aviation, and safety has to be the ultimate goal of any new design concepts. In our modern lust to build cheap, it would be a tragedy...
  4. jsharp

    Ebay Today

    My oldest son was at New Mexico Tech and on the phone with us when it happened, it was crazy. It looked like winter but also a disaster zone as if the building, cars, trees, etc.; had been shelled during war. And yes they were softball sized, I had never seen any hail that size before. So many...
  5. jsharp

    A new well done video on the latest three Subaru Boxer engines

    Excellent observations and conclusions. I posted this video because I thought it would be of interest to those considering a Subaru Boxer engine for aircraft. In one place (video) there are examples of three modern versions of the Boxer engine. What I found most interesting at "first glance"...
  6. jsharp

    A new well done video on the latest three Subaru Boxer engines

    The whiteboard analysis, includes the new engine for 2022. He goes over torque curves, turbo vs non turbo, and many other little details that I have missed from other sources. The channel is called Engineering Explained, It is the best public analysis of later model Subaru Boxer engines I have...
  7. jsharp

    Lets talk about diesels.

    Multiple boat owner and former airplane owner/pilot since 1988 (Mooney M20 with an 0-360 A1A). The 5.7l (350 ci) Mercruiser inboard engine starts out as a factory block. The cam is not the auto version. The Mercruiser cam makes peak power much closer to WOT. The exhaust valves were chrome plated...
  8. jsharp

    You thought amateur drones were dangerous, what about the jetpacks?

    I remember years ago a gentleman in Mexico was making the older style peroxide jetpacks. Their flight time is extremely short so I doubt that technology was used. The new jetpacks are large RC gas turbines and have been proven to work. Still not sure you can make that altitude with the very...
  9. jsharp

    Zongshen aero engines available in Europe

    The Chinese have owned Rotorway for some years now. Rotorway had developed its own aircraft engine for their helicopters. The Chinese now own the rights and have had the manufacturing tooling and design drawings more than long enough to start selling variants of what was/is a very acceptable...
  10. jsharp

    Thorp T211 corrugated wing skins

    Those skins are rolled in two directions. The beads, and the sheet/skin contour would typically be rolled in one operation however, that may not have been the case with ford. The skin contour and final shape may have been rolled, and then run through the dies on the bead roller (biggest bead...
  11. jsharp

    Thorp T211 corrugated wing skins

    It looks like a two roller setup. The leading edge skins might have been pre-bent to the airfoil shape, then run through the roll former to create the corrugations on the panel. This would be possible with with a three roll former (smooth rollers) to shape the skins to the airfoil shape, then...
  12. jsharp

    Scrappy’s Landing Gear Wings - Yay or Nay?

    Pago Bay, With respect, the Forbes article you reference is fine if I am a corporate director or HR manager looking to build a team of like minded corporate robots. That's just about all the article is worth and has little value in Pops apparent (and I apologize Pops if I am making an incorrect...
  13. jsharp

    Scrappy’s Landing Gear Wings - Yay or Nay?

    I wish I still had the enthusiasm and drive shown by Mr. Patey as I had more than thirty years ago when I completed my private ticket, let alone the incredible enthusiasm I had for aviation in the early 70's when I was 14. If you take the time to watch his videos, he donates RC planes to kids...
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