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Mark2

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January 3, 2005 at 10:45 pm in reply to: B-2 class A #2619991

Mark2
Participant

Think you are referring to fairly recent B-2 engine compressor stall incident… Cost put at over the $1 million threshold…

Mark

September 15, 2004 at 4:02 pm in reply to: MiG-23/27 Flogger and MiG-25/31 #2647632

Mark2
Participant

“G forces” are a term typically used to express the ratio between the “Total Lift” and the weight of the aircraft (‘g’ is also known as load factor). In the diagram “G” should really be identified as Weight (which as you say is [more or less] a constant value). Weight acts opposite to “Effective Lift” (which is not depicted).

Here’s some reading on basic aero….

http://www.aerospaceweb.org/question/performance/q0146.shtml

That said ‘g’ is also commonly used to describe acceleration in any axis. For example the ‘g’ forces during a catapult launch, or the g forces of a Formula One car in a turn. For aircraft discussions most often find reference to the “load factor” (Total Lift divided by Weight)

Mark

September 14, 2004 at 3:58 pm in reply to: B-2 bomber #2648663

Mark2
Participant

i know the B-2 flys at airliner speeds but can it do any type of defensive manoeuvering? ive seen it do steep banks and turns on film footage on tv. would it be really so defenceless? is this something the B-2 designers ignored when they built the plane? seems a big trade off for all the stealth performance.

It can maneuver, but nothing to challenge a fighter-interceptor. If a fighter gets to within visual range of B-2, it’s pretty much over…

Mark

September 13, 2004 at 5:34 pm in reply to: B-2 bomber #2649541

Mark2
Participant

….There also are other possibilities to locate it, as B-2A still emits many signals, such as GPS, TACAN or radio-altimeter. …..

To clear up a few things.. GPS is a passive system from the aircraft point of view. TACAN is only used in peacetime and is not considered a method for navigation in wartime scenarios (TACANs are only good for 200nm or so and the ground stations are located in ‘friendly’ territory). If B-2 is used at medium/high altitudes wouldn’t need a Radio Altimeter. If at lower altitudes, the power can be kept very low and the signal is pretty much directional. Don’t know if B-2 was/is planned for low altitude attacks… Anyone????

Mark

September 10, 2004 at 10:55 pm in reply to: F-22 high altitude maneuverability #2651764

Mark2
Participant

If an airplane (any airplane) is above corner velocity (indicated/calibrated airspeed) it can pull maximum g….

F-15, F-16 or F/A-22

The Mach No altitude combination gives about 520 KCAS. An F-15 should be able to match this 7G ‘feat’ (instantaneous). Now that said…. if we are talking sustained a potentially MUCH different story.

Another way to look at it is with an imaginary F/A-22 and F-15 flying in formation at the stated conditions. On the word “go” they would both be capable of pulling 7Gs, but very rapidly the F-15 would be losing a great deal of airspeed (and resulting loss in ability to pull g loads). Question would be what would the F/A-22 be doing in terms of airspeed loss (if any)?

Would need to see the specific excess power plots for both aircraft to know what would really happen….

Us mortals will probably never know

Mark

September 8, 2004 at 5:59 pm in reply to: Pictures, news and speculation thread #2653633

Mark2
Participant

F-15 (Tyndall) accident board results are out on a rather rare ‘unintended’ ejection….

http://www.airforcetimes.com/print.php?f=1-292925-340719.php

Mark

ps for those interested some info on Combat Edge

http://www.f16cockpit.net/FGear.html

September 2, 2004 at 4:47 pm in reply to: GREY BEARS #2657480

Mark2
Participant

MiG-29s also deployed to Nellis for Red Flag…

http://www.reviewjournal.com/lvrj_home/1999/Oct-23-Sat-1999/news/12206728.html

Mark

September 1, 2004 at 4:41 pm in reply to: GREY BEARS #2658363

Mark2
Participant

Some photos I have found so far. Migs in the Nellis AFB hangars.

These two pictures are kind of interesting (from different sources). Looks like a before/after a new paint job (appears to be same airplane parked in same room/hanger)

Mark

August 24, 2004 at 11:15 pm in reply to: Hank Caruso Art #1965791

Mark2
Participant

Here you go….

http://www.aerocatures.com/

I’ll take a Tecate with lime 🙂

Mark

On second thought; make it a pint of ale!!

August 24, 2004 at 3:08 am in reply to: Su-15 Flagon Pics #2665569

Mark2
Participant

Here’s a link to a few more…. Some are quite nice

http://www.airwar.ru/photo/su15-1.html

Mark

August 16, 2004 at 2:22 am in reply to: MiG-23/27 Flogger and MiG-25/31 #2645315

Mark2
Participant

For our Mig experts….

Am I seeing a wing fence on the upper wing, or is it my imagination??

Doesn’t look like it has an aerodynamic function

Flogger… can you upload a higher res picture? btw nice pictures 🙂

Thanks

Mark

August 3, 2004 at 4:52 pm in reply to: Very nice looking HUD! #2654733

Mark2
Participant

Kind of interesting that a pilot from 28th Test Squadron (Eglin) is at Nellis getting some hands-on with F/A-22. Wonder if they will get their own bird(s) after all??? I had speculated that they would not as there aren’t a whole lot of birds to go around…

Mark

July 23, 2004 at 6:44 pm in reply to: Top speed of the F-15 #2663118

Mark2
Participant

One other variable is the target speed…. All else being equal, the faster the target, the greater missile range (to be more specific…. the range from launch platform to the target at missile launch).

Another way to look at it is a combination of closure velocity (V sub c) and density altitude. All assuming no target maneuvering (constant velocity vector)

Low altitude, opening Vc –min maximum range; high altitude, high closure– max maximum range

Mark

July 23, 2004 at 4:32 pm in reply to: F-15C Eagle #2663219

Mark2
Participant

Since we’re on the subject (kind of) of LN birds. Here’s one from a.b.p.aviation forum today.

Nice….

Mark

July 23, 2004 at 2:30 pm in reply to: F-15C Eagle #2663353

Mark2
Participant

Correct.

Mark – you’ll find some better quality images at FenceCheck.Com (just look in the articles section – NOMAD 2003, ACMI 2003, Southend Airshow 2004).

Another pic of the Eagle….

Google let me down 🙂

Haven’t been thru the ‘articles’ area recently. Been to busy in their forum (which I highly recommend to those that haven’t been there)

btw folks…. there are some other nice pictures from RIAT over in the Historic Aviation forum

http://forum.keypublishing.co.uk/showthread.php?t=28775

Cheers

Mark
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