Boeing - Design Issues...

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Scheny

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Feb 26, 2019
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203
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Vienna, Austria
I heard that the newest 737max problem is deactivating the flight director if the stick shaker activates. To avoid an undefined state, the flight director and autopilot would have to turn themselves off on their own. So, no toggle switch anymore.
 
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Urquiola

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Aug 23, 2013
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96
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Madrid, Spain
An F-104, with the tail arrangement of X-15 (Flat back of X-15 vertical tail unit is to reduce Base Drag at hypersonic speed), avoiding the Super-Stall danger of 'T' tail unit, looks fine. Who will buy this idea? Blessings +
 
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Urquiola

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Aug 23, 2013
Messages
96
Location
Madrid, Spain
Early in aviation, most was wood and fabric made, then came all-metal; later in past century, the composites.
Well, you know concrete is a composite, besides sand, iron bars or nets, you can add lots of different things for a reinforced, prestressed concrete, just some testing is needed.

The Tech School in Karlsruhe, Germany, managed to build a Kart sized car in concrete, with walls as thin as 4 mm, thus opening the possibility of a re-entry or space vehicle made in concrete, which has a high heat resistance, evidenced in the Madrid Windsor building fire. Heat pipes are very good in getting rid of heat.
In shipbuilding, it was shown that BV-246.jpgBV-246 Concrete Wing.jpgBV-246 Wing at Smithsonian.jpgfrom a hull lenght above 10 m, the ratio hull weight to buoyancy in a concrete boat is same or better as with a traditional wood or steel hull.
Structures in the F-104 and NASA lifting bodies don't look extremely complex, not beyond a homebuilder's abilities
You can have also look at UK document CP 1076, in Cranfield Repository, added here in Homebuilt airplanes by Barnaby Wainfan, designer of facetmobile, about an Ogival leading edge Delta wing planform, working better without the wingtip vertical surfaces, not winglets, and having a vertical central fin instead.
You may know that Blohm und Voss produced in the 40s some Gliding bombs with wings made of concrete, the BV-246. Patent US2776100 is about a procedure to make wings in concrete.
 

Doggzilla

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Jun 2, 2013
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2,324
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Everywhere USA
Most thin concrete is reinforced with fibers. I know the concrete boats sure are, I used to race them.
 
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