Aces High Bulletin Board
General Forums => The O' Club => Topic started by: Bino on May 04, 2011, 02:49:51 PM
-
I just found this over on the EAA web site. This composite aircraft with a "double-box tail" will use a turbocharged liquid-cooled DeltaHawk (http://www.deltahawkengines.com/) engine to transport a pilot plus four passengers:
(http://www.eaa.org/news/2011/images/Synergy.jpg) (http://www.eaa.org/news/2011/2011-04-29_synergy.asp)
-
An interesting idea, but seems to be nothing more than a concept at this point, I'm interested in it's forcasted performance and handling characteristics though.
-
The design would eliminate wing tip vortices.
-
I'd never step inside something like that :uhoh
-
I'd never step inside something like that :uhoh
Good thing the Wright brothers never said that. :neener:
-
Naaaa.... wrong color.
This is Synergy Stealth...
(http://i134.photobucket.com/albums/q96/Shuff_photos/front.jpg)
:D
-
The design would eliminate wing tip vortices.
Sure - that's a function of the wing's continuity. The pressure diff in a normal wing bottom to top causes generation of a tip vortex. However, I can't tell from the photo whether you would have any discontinuities - these would lead to shed vortices anyway, albeit not tip vortices. For example, where the tail surface meets up with the wing it looks like there might be a chord change.
-
Bet that airplane would fly like a turd in a crosswind.
-
Bet that airplane would fly like a turd in a crosswind.
How does a turd fly?
-
How does a turd fly?
Wait, I'll answer myself.
I suspect it flies like a simple ballistic if you get enough grunt behind it.
I.e., the prairie dog will fly if you can generate enough pressure in his hole.
-
Crappy conjecture if you ask me. :p
-
Bet that airplane would fly like a turd in a crosswind.
Check out the video. They built a 1/4 scale model that apparently flies quite well. They hope to have the full-scale version completed this Summer.
I find the engine alone very interesting: a supercharged & turbocharged liquid-cooled two-stroke V-4 Diesel. This image superimposes the DeltaHawk on an air-cooled IO-320:
(http://www.deltahawkengines.com/images/lyc_side20cropped_b.jpg)
-
Check out the video. They built a 1/4 scale model that apparently flies well. They hope to have the full-scale version completed this Summer.
Then all we need is another John Denver.
-
Then all we need is another John Denver.
He was a great musician, but not to great pilot.
-
I wonder if high angle of attack required by it's intended usage will cause the lower wing to blank the upper surface.
We saw what happened to the jetpod because of that on it's first takeoff.
-
I wonder if high angle of attack required by it's intended usage will cause the lower wing to blank the upper surface.
We saw what happened to the jetpod because of that on it's first takeoff.
104 had a similar problem, as did early DC-9s. Otoh, I was wondering if it'd function like a canard - the forward wing stalling first would simply cause a nice nose down pitch moment- assuming you've got decent flow over the rear wing.
-
That pusher configuration will either require really long main gear or placing it in a far aft scheme.
A far aft scheme is bad mojo.
-
That pusher configuration will either require really long main gear or placing it in a far aft scheme.
A far aft scheme is bad mojo.
Look at the still shots: http://www.facebook.com/media/set/fbx/?set=a.10150229380588623.378703.192081688622 (http://www.facebook.com/media/set/fbx/?set=a.10150229380588623.378703.192081688622)
The prop has a fairly small diameter, so no long mains are needed.
And why is putting the engine in the rear bad?
-
I wonder if high angle of attack required by it's intended usage will cause the lower wing to blank the upper surface.
We saw what happened to the jetpod because of that on it's first takeoff.
From that EAA web page:
"Like the canard designs that inspired its drag reduction priorities, Synergy is designed to be incapable of unintentional stalls..."
-
From that EAA web page:
"Like the canard designs that inspired its drag reduction priorities, Synergy is designed to be incapable of unintentional stalls..."
Awesome...... I'll name mine Titanic. :D
-
Cool . . 2 stroke turbo-blown diesel should do very well
..no detonation worries, just gotta be light enough and strong enough to put out the power required.
hmm . . wonder how it would run in say .. a Datsun 510 :)
-Frank aka GE
-
How does a turd fly?
Like a Phantom? :D :x :bolt:
-
Naaaa.... wrong color.
This is Synergy Stealth...
(http://i134.photobucket.com/albums/q96/Shuff_photos/front.jpg)
:D
I always knew you envied me <shucks, kicks dirt blushes>.
greens
-
Like a Phantom? :D :x :bolt:
LOL Rino :)
-
The small prop diameter is because of the wake immersed propulsion concept. The idea is to have a propeller radius which only affect already disturbed air in order to minimize drag. The prop is also constant pitch if I understood this correctly. They are combining several proven concepts into one airframe, nobody has done this before. Synergy is a very well chosen name for the design. I like it, in fact I love it... they are on to something I just hope they can find the sweet spot in the design work.
-
The engine aloneis quite interesting. It's been a while since two-stroke diesels were about.