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1
Early Aircraft Projects / Re: AM Specification B.19/27
« Last post by Hood on Today at 01:22:32 am »
That's a very nice find.
Unmistakably a Hawker, you only have to look at the tail. Interesting it has a Flettner rudder tab.
Also interesting is the use of the name Sopwith Hawker, I would have expected H.G. Hawker Engineering but I guess Tom Sopwith kept the Sopwith name alive, at least internally.
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Naval Projects / Re: Navy Unveils 3D-Printed SEAL Sub
« Last post by Moose on Yesterday at 10:10:52 pm »
When we tip over into regularly producing really big things this way, life's going to get very very interesting.
3
Space Projects / Re: ARCA Haas 2CA rocket (SSTO with aerospike engine)
« Last post by Michel Van on Yesterday at 08:01:30 pm »
More on engine of demonstrator 3

4
Oh Toppu(突風)!! This is the first time for me to see this name. :o

突風 means
a (sudden) gust of wind
or
a squall
or
a blast of wind

I find this site.
https://forum.valka.cz/category/view/500610/Kawanisi

Hi blackkite,

Is it a genuine aircraft? There was discussion about its existence and was wondering if this was true

Cherry
Sorry I'm not sure. Why was there discussion about Toppu existence? Any evidence? Who said the existence of Toppu?
I have not seen Toppu information in Japanese sources.
5
Naval Projects / Navy Unveils 3D-Printed SEAL Sub
« Last post by seruriermarshal on Yesterday at 05:21:09 pm »
 ;D



Navy Unveils 3D-Printed SEAL Sub

Jul 24, 2017

The U.S. Navy recently unveiled the military's first 3D-printed submarine hull. Printed on the Big Area Additive Manufacturing (BAAM) machine at Oak Ridge National Laboratory's (ORNL) Manufacturing Demonstration Facility, the Optionally Manned Technology Demonstrator is modeled after the SEAL Delivery Vehicle (SDV). SDVs are manned submersibles that are used to take Navy SEALs and their equipment on special operations missions. The BAAM has been used for many notable 3D printing projects, including the world's first 3D-printed car, as well as ORNL's 3D-printed Shelby Cobra.

The hull is 30 feet long, and made of six carbon fiber composite sections. The project only took four weeks to complete, and the proof-of-concept also cut production costs by 90%.

According to the Department of Energy, a traditional SEAL Delivery Vehicle costs between $600,000 and $800,000, and it takes three to five months to manufacture. So, that means that they made this sub for as low as $60,000 and it was printed in a number of days total development time took four weeks, but it only took a few days to print the six sections.

Next, the team plans to build a second iteration of the hull. This one will be water-tight and undergo wave pool testing at an elite testing facility in Maryland.

The timeline sounds aggressive, but Oak Ridge and the Navy believe that they could have fleet-capable prototypes could be available as early as 2019.

http://news.thomasnet.com/featured/navy-unveils-3d-printed-seal-sub
6
http://japaneseaircraftofwwii.blogspot.it/2015/03/kawanishi-a8k-projected-fighter-carrier.html

where  Mitsubishi A8M seems be A7M3 for carriers .

Nakajima A8N it's new for me
7
Agree with the likelihood of success but this was a strategic target so no surprise such plans were hatched.


Re seaplanes deploying 'midget subs', both the Italians and British advanced plans to carry 'chariot' style wet subs on seaplanes. And the British also tried explosive boats dropped on parachute from lancasters (with the crew in the boat!?!?!).

In the event neither Italian nor British considered it viable. But flying boats were routinely used for deploying special forces in inflatable boats or canoes.
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Early Aircraft Projects / Re: AM Specification B.19/27
« Last post by Schneiderman on Yesterday at 11:49:31 am »
I have no idea where I found this, maybe an image from ebay or a forum somewhere. Probaly not here, I can't find it with search (sorry, I usually keep notes)
Sopwith Hawker - Night Bomber Landplane 19/27
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Early Aircraft Projects / Re: Avro Pre-1945 Projects
« Last post by Schneiderman on Yesterday at 11:34:25 am »
Don't worry, its a problem with many of the Putnams. They are excellent books but it is always worth checking the story in more than one, its surprising how different they can be  ;)
10
Early Aircraft Projects / Re: Avro Pre-1945 Projects
« Last post by hesham on Yesterday at 11:24:02 am »
Yes, and the DH Putnam says the same. However the Bristol and Vickers Putnam's say 30/24, as does Meekoms and Morgan. As all the aircraft flew in early 1925 and were assessed at Martlesham later than year I think it must have been 30/24.

OK my friend.
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