Lockheed Archangel 1

[PlanesPictures]

First from Archangels family

 

[Orionblamblam]

Only problem I see is that the cockpit canopy has much too large of a transparency.

 

[PlanesPictures]

Fallen Angel bad landing - it will be with that cockpit. OK, cockpit similar as by A-12 will be ok?

 

[Orionblamblam]

cockpit similar as by A-12 will be ok?

Yup.

Large, fast-moving, non-dogfighting planes like this wouldn't need wide-open canopies... and for somethign going so fast that normal structures would melt, big windows would present big problems.

 

[PlanesPictures]

yes, all has its logic but time by time error occurs. But in our virtual world we can fix it without fatal problems

 

[PlanesPictures]

what this one?

 

[Orionblamblam]

Looks about right.

 

[foiling]

Another breath-taking artwork, Jozef. Thank you.

 

[Grey Havoc]

Looking good!

 

[PlanesPictures]

and version A-1.0001 or maybe 1.0002? with corrected cockpit

 

[shockonlip]

Indeed! Very Nice Jozef !

 

[Orionblamblam]

One more thing: the engines on the wingtips are ramjets. I'm not entirely sure, but I'm *reasonably* sure that any ramjet operating at full power (and in a design like this, that's how they'd operate) would produce not faint smoke in the exhaust, but nice bright shock diamonds.

Below are SR-71/J58 shock diamond photos. The shock diamonds are visible generally only when the afterburner is on... the afterburner being, in essence, a ramjet.

http://www.456fis.org/PRATT_&_WHITNEY_J58_ENGINE.htm
-------------------------

 

[shockonlip]

The shock diamonds indicate a pressure mismatch between nozzle exit pressure
and the external ambient pressure.

In the photos of the SR that you posted, I believe those nozzle exit flows look
overexpanded. Indeed, some are photos of the J58 on or very near the ground.

Overexpanded means that ambient pressure just outside the nozzle is higher than
the nozzle exit pressure. So to correct, the flow will form a compression shock
and in fact, if I recall the details properly, it will overcompensate and then be
underexpanded, then it will throw in a expansion shock, to compensate, and then
be somewhat overexpanded again after that. The process repeats until the flow is
near ambient. So in those photos you see a chain of around 10 or so such sets
of transitions.

If the ramjets are at proper altitude for the nozzle, they wouldn't have shocks
as the ambient would exactly match the nozzle exit pressure.

I can check details later tonight.

 

[Orionblamblam]

The shock diamonds indicate a pressure mismatch between nozzle exit pressure
and the external ambient pressure.

These pressure mismatches are hard to avoid, especially when accelerating and/or changing altitude. It doesn't take *much* to set them up. Afterburning engines produce them all the time *today*, even with a boatload of computational power behind adjusting the nozzles ona millisecond basis. An early 1960's Archangel would hardly be able to avoid them.

Here's an F-22 making them:

If an F-22 can't avoid them...


Plus, they look much more impressive than just a thin smoke trail.

 

[shockonlip]

It's really a matter of degree.

The shocks shown in the SR photos are within the nozzle. This is usually
a sign of greatly overexpanded flow. Such flow conditions are usually not
transitional in nature. I expect these are due to low altitude and a high
throttle setting. Sometimes for takeoff and sometimes for showoff, which
we all appreciate at airshows.

But in the end it doesn't really matter I guess as you could draw the
Archangel 1 with or without them. For me, personally, I think I prefer it
as shown. But if Jozef adds shock diamonds, that is OK too.

As far as the F-22 picture. It is very cool of course, but also low altitude.
This is just the kind of thing that crowds (and I) love at airshows. But,
we also don't know a lot of F119-PW-100 details. It is a very cool engine
with counter-rotating high pressure compressor stages, counter rotating
turbine stages, interesting cooling and materials tech., and the neat nozzle
(and other stuff I'm sure).

But, I have not been able to find any details of its thrust vectoring 2-D nozzle.
We know it adjusts its 2-D walls for thrust vectoring, but I have not read
where it does that for adjusting its expansion dynamically at millisec. resolution,
as you suggest. Do you have a reference?

 

[PlanesPictures]

Archangel 1 is still in development (textures). Smoke was done handly as temporary solution and if in smoke will be shock diamonds, too it will depend on scene. When longer time ago I rendered pictures in PovRay (freeware, www.povray.org, scenes are created in language similar to language "C") I have created modules for rendering flame, smoke etc. (Ta-283 sample). I want to do similar step in Vue but it will be heavy job only for a new comp. For example beautiful clouds in Archangel's background (width 2400 pixels) were rendered in Vue on my comp 29 hours. On my son's notebook it is 16x faster. For now I try to move forward in quality and when it will be right time you will see final results.

 

[ikke666]

are you gone to CG draw the other archangels too? ???

 

[PlanesPictures]

I suppose... YES

1 2 3 4 5 6 7 8 9 10 11 12?

 

[Orionblamblam]

I suppose... YES

1 2 3 4 5 6 7 8 9 10 11 12?

The only ones that probably can't be done are the 8 & 9, as drawings for those have not emerged. Someone who has dug into this far more than I has had no success whatsoever in finding them. The others, though, are all well documented. As are a few related designs that *aren't* in the Archangel series (such as the Kite, Arrow, D-33 and pseudo-Fish designs).