Hmmm... but then, it wouldn't generate the same aerodynamic effect, would it? It would be a wing, not a scoop.larry cottrill wrote:Bruno -
The "scoop" is rear-facing
Search found 3549 matches
- Fri Jan 02, 2009 8:09 pm
- Forum: Jet Vehicles, All Types
- Topic: Ekranoplan?
- Replies: 7
- Views: 10133
Re: Ekranoplan?
- Wed Dec 31, 2008 2:21 pm
- Forum: Jet Vehicles, All Types
- Topic: Ekranoplan?
- Replies: 7
- Views: 10133
Re: Ekranoplan?
Seems like a good use for a compact "linear" engine like the old linear FWEs. Mount the engine backward so the intake points aft. Pick up all the exhaust pipe effluent with a "scoop" that bends it around underneath the wing-shaped body I don't think I understand the layout you are proposing. I see ...
- Wed Dec 31, 2008 7:22 am
- Forum: Valved pulsejet forum
- Topic: Tenney's rotary Dynajet
- Replies: 15
- Views: 13182
Re: Tenney's rotary Dynajet
More ideas coming. The air intake to the outer chamber should be lengthened, so that the gas flow sucks fresh air through a longer duct and generates positive fresh air pressure (ram pressure) on the combustion chamber intake. Eliminate the valves; this thing would happily run without them, given pr...
- Wed Dec 31, 2008 7:04 am
- Forum: Valved pulsejet forum
- Topic: Tenney's rotary Dynajet
- Replies: 15
- Views: 13182
Re: Tenney's rotary Dynajet
To me, it looks as if the thing would benefit from Stage 2. Instead of having a single tangential exhaust from the outer casing, I'd duct the mixture of exhaust gas and fresh air around the lip of the backing plate and onto a radial turbine, as on a Whittle turbojet. See the very crude sketch below....
- Tue Dec 30, 2008 10:08 pm
- Forum: Jet Vehicles, All Types
- Topic: Ekranoplan?
- Replies: 7
- Views: 10133
Re: Ekranoplan?
Larry, the point is that the ground effect acts as if it extended the wingspan. So, imagine the wingspan tripled and you get to somewhere near the equivalent of the 'normal' aircraft. Another way to do it is to create an air 'cushion' under the vehicle by pushing air under the vehicle. Imagine a bri...
- Tue Dec 30, 2008 6:15 pm
- Forum: Jet Vehicles, All Types
- Topic: Ekranoplan?
- Replies: 7
- Views: 10133
Re: Ekranoplan?
Charlie, you can play with a WIG vehicle on your own on a much smaller scale, as one is commercially available in the US: http://www.hovercraft.com/content/index.php?main_page=index&cPath=34_53 I have little doubt that it could be pulsejet-powered, but it would be noisy as hell. It would be a fantas...
- Sun Dec 14, 2008 9:30 pm
- Forum: Jet Vehicles, All Types
- Topic: Pulsejet-powered sailplane
- Replies: 10
- Views: 15051
Pulsejet-powered sailplane
http://www.lange-flugzeugbau.com/htm/english/products/antares_18p/antares_18p.html Some dubious claims here. The engine is said to represent " the leading edge of a family of jet engines, which can be traced back through more than 60 years of German aviation technology ". Haw-haw-haw... Interesting...
- Fri Nov 28, 2008 7:32 pm
- Forum: Off topic forum
- Topic: Energy needed in order to run turbo compressor
- Replies: 2
- Views: 4060
Re: Energy needed in order to run turbo compressor
Wouldn't it make much more sense to drive the compressor with an electric motor? You'd only really have to upgrade your alternator and battery to cope with the extra load. No other special systems.
- Wed Jul 30, 2008 2:11 pm
- Forum: Off topic forum
- Topic: Finally a more-or-less realistic backpack flying machine
- Replies: 4
- Views: 4920
Re: Finally a more-or-less realistic backpack flying machine
Well, as I already wrote under the topic that Bill has opened on the same machine (under 'Jet Vehicles'), I think it's a bit of overkill. I think a backpack helicopter with a coaxial counter-rotating rotor and a smaller, 50-100 HP Wankel engine would be a better bet. Probably safer, too. I have no i...
- Wed Jul 30, 2008 7:11 am
- Forum: Jet Vehicles, All Types
- Topic: Introducing the Martin Jetpack
- Replies: 4
- Views: 6773
Re: Introducing the Martin Jetpack
To comment on the machine itself -- it's a more successful rendition of the Solo Trek layout. Mechanically, I think it's a bit of overkill. I would think a more conventional coaxial rotor assembly powered by an engine of less than half the power of the Martin engine (which is a 200 HP 2-liter two-st...
- Wed Jul 30, 2008 7:02 am
- Forum: Jet Vehicles, All Types
- Topic: Introducing the Martin Jetpack
- Replies: 4
- Views: 6773
Re: Introducing the Martin Jetpack
Sorry, Bill, just saw you post this here. I posted a long list of links in the 'Off-Topic' section of the forum. I had no intention of 'competing' with your post. I was just hugely entertained by the whole thing. Here's my list repeated: YouTube videos of Martin JetPack http://www.youtube.com/watch?...
- Wed Jul 30, 2008 6:59 am
- Forum: Off topic forum
- Topic: Finally a more-or-less realistic backpack flying machine
- Replies: 4
- Views: 4920
Finally a more-or-less realistic backpack flying machine
Here are some links to the Martin Jetpack introduced at Oshkosh yesterday. YouTube videos of Martin 'JetPack', which is not quite a jet pack. http://www.youtube.com/watch?v=vyb6vnX1My0 http://www.youtube.com/watch?v=Cgels591kXk http://www.youtube.com/watch?v=58YXSwiyRco http://www.youtube.com/watch?...
- Sun Jul 27, 2008 4:24 pm
- Forum: Valveless pulsejet forum
- Topic: pulse jet investigations.
- Replies: 3
- Views: 3447
Re: pulse jet investigations.
Well, I tickles me pink that they were honest enough to cite my paper among the literature. Though, I really do wonder what the f*** they might have found there that was useful, given the broad range of serious studies that were used in their research. Maybe it was good for a laugh in the coffee bre...
- Fri Jul 04, 2008 8:51 am
- Forum: Jet Vehicles, All Types
- Topic: Air Hummer
- Replies: 4
- Views: 6080
Re: Air Hummer
I know that it would be excellent theoretically. After all, I've been preaching heat recuperation on pulsejets for years, to all and sundry, to the puzzlement of seemingly everyone. What I doubt is that a serious, practical solution light enough to be used on a flying machine would be employed on a ...
- Thu Jul 03, 2008 10:08 pm
- Forum: Jet Vehicles, All Types
- Topic: Air Hummer
- Replies: 4
- Views: 6080
Re: Air Hummer
Well, if it worked, it would truly be a big thing. Lack of waste heat recovery is a major bummer in aircraft turbine engines.
Somehow, if it did work, I doubt people would be putting it into an 'Air Hummer' first.
Somehow, if it did work, I doubt people would be putting it into an 'Air Hummer' first.