Belesarius Posted March 29, 2015 Report Share Posted March 29, 2015 http://www.armytimes.com/story/military/tech/2015/03/28/army-boeing-sikorsky-defiant/70148472/ Quote Link to comment Share on other sites More sharing options...
Toxn Posted March 29, 2015 Report Share Posted March 29, 2015 Concept image from 2009: Sturgeon 1 Quote Link to comment Share on other sites More sharing options...
Belesarius Posted March 29, 2015 Author Report Share Posted March 29, 2015 LOLZ. Quote Link to comment Share on other sites More sharing options...
LoooSeR Posted March 30, 2015 Report Share Posted March 30, 2015 I just remembered a thing i found about future helicopters. Here is one guy's proposal: Quote Link to comment Share on other sites More sharing options...
Sturgeon Posted March 30, 2015 Report Share Posted March 30, 2015 That's a cute little art project. Oedipus Wreckx-n-Effect 1 Quote Link to comment Share on other sites More sharing options...
Toxn Posted March 30, 2015 Report Share Posted March 30, 2015 I would love to see some try to make a working model. Preferably from a safe distance. Quote Link to comment Share on other sites More sharing options...
Sturgeon Posted March 30, 2015 Report Share Posted March 30, 2015 This is probably more practical: Quote Link to comment Share on other sites More sharing options...
Belesarius Posted March 31, 2015 Author Report Share Posted March 31, 2015 Edited the original post to include a link to the story. That's what I get for posting when not fully awake. And the engineering for that CAS-1 concept looks like a nightmare. Quote Link to comment Share on other sites More sharing options...
Sturgeon Posted March 31, 2015 Report Share Posted March 31, 2015 Edited the original post to include a link to the story. That's what I get for posting when not fully awake. And the engineering for that CAS-1 concept looks like a nightmare. I'm pretty sure that's like a graphic design student's project. No way any actual engineering went into it. Quote Link to comment Share on other sites More sharing options...
Priory_of_Sion Posted March 31, 2015 Report Share Posted March 31, 2015 I'm pretty sure that's like a graphic design student's project. No way any actual engineering went into it. Here is the guy's official website. You gotta love the "Machines You Can Believe" subtitle. In actuality, it looks like the guy knows what he designed is utterly impossible though. Good for him. Quote Link to comment Share on other sites More sharing options...
LostCosmonaut Posted March 31, 2015 Report Share Posted March 31, 2015 Here is the guy's official website. You gotta love the "Machines You Can Believe" subtitle. In actuality, it looks like the guy knows what he designed is utterly impossible though. Good for him. In Christianity, there is a saying about "faith that can move mountains". I'm not sure how Jesus would feel if he knew that those words were being applied to rotorcraft engineering. Also, if you know a company that's looking to increase their production of extra-meaty salsa, put them in contact with this guy. Additional advice; if this gets built, invest in companies that manufacture gearbox components. xthetenth 1 Quote Link to comment Share on other sites More sharing options...
Belesarius Posted March 31, 2015 Author Report Share Posted March 31, 2015 Also, I think having rotors underneath the body of the aircraft is extremely problematic in the even of a failure of some sort. I can see this being a VERY BAD THING. Just sayin'... Edit: More random thoughts. I kinda like the idea of ducted rotors. Offers some hardening for minor collisions and possibly, with modern materials, probably greater ground fire resistance. Tho, that Sikorsky one looks like a cross between a UH60, a short bus, and a toy quad copter. Quote Link to comment Share on other sites More sharing options...
Donward Posted March 31, 2015 Report Share Posted March 31, 2015 Next Gen Hello Kitty Program Ah Quote Link to comment Share on other sites More sharing options...
xthetenth Posted March 31, 2015 Report Share Posted March 31, 2015 Also, I think having rotors underneath the body of the aircraft is extremely problematic in the even of a failure of some sort. I can see this being a VERY BAD THING. Just sayin'... Edit: More random thoughts. I kinda like the idea of ducted rotors. Offers some hardening for minor collisions and possibly, with modern materials, probably greater ground fire resistance. Tho, that Sikorsky one looks like a cross between a UH60, a short bus, and a toy quad copter. I kind of like it for damage resistance, although the problem of damage meaning unsustainable out of trim might come up (although with four a fly-by-wire setup might be able to cut the opposite one to give a soft crash capability), but what I really like it as is a way to decrease the ratio between blade length and total lifting area, which is nice, and might help us get higher speeds without running into retreating blade stall issues. Not sure there. Quote Link to comment Share on other sites More sharing options...
Collimatrix Posted April 1, 2015 Report Share Posted April 1, 2015 Color me dubious that pulling air through a hole in the fuselage would provide less drag than blowing it past the outside of the fuselage. Quote Link to comment Share on other sites More sharing options...
xthetenth Posted April 1, 2015 Report Share Posted April 1, 2015 Color me dubious that pulling air through a hole in the fuselage would provide less drag than blowing it past the outside of the fuselage. That likely wouldn't, although really the limiting factor on helicopter speed isn't really drag per se. Sturgeon 1 Quote Link to comment Share on other sites More sharing options...
Xlucine Posted April 1, 2015 Report Share Posted April 1, 2015 Ooh, I like the reducing blade stall idea. I wonder if it would actually work? Quote Link to comment Share on other sites More sharing options...
LostCosmonaut Posted April 1, 2015 Report Share Posted April 1, 2015 Behold, the Ka-90; (apparently the rotors fold back for high speed flight, lift is produced through unknown means) Sturgeon 1 Quote Link to comment Share on other sites More sharing options...
Toxn Posted April 1, 2015 Report Share Posted April 1, 2015 Looks like a bootleg copy of the 6th day made it to Russia. Belesarius 1 Quote Link to comment Share on other sites More sharing options...
Belesarius Posted April 1, 2015 Author Report Share Posted April 1, 2015 Pretty concept. Chances of it flying? I wouldn't put money on it. Quote Link to comment Share on other sites More sharing options...
Toxn Posted April 1, 2015 Report Share Posted April 1, 2015 Chances of it flying after all the lifting surfaces are gone? Quote Link to comment Share on other sites More sharing options...
Collimatrix Posted April 1, 2015 Report Share Posted April 1, 2015 That likely wouldn't, although really the limiting factor on helicopter speed isn't really drag per se. Not drag against forward flight, drag against the lift from the rotors. The artist rightly points out that putting the fuselage underneath the rotors cancels out some of the rotors' lift, but I am unconvinced that sucking your air through the helicopter is a better option. Quote Link to comment Share on other sites More sharing options...
xthetenth Posted April 1, 2015 Report Share Posted April 1, 2015 Not drag against forward flight, drag against the lift from the rotors. The artist rightly points out that putting the fuselage underneath the rotors cancels out some of the rotors' lift, but I am unconvinced that sucking your air through the helicopter is a better option. Ahh, okay, missed what you were referring to. Quote Link to comment Share on other sites More sharing options...
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