C-130 Hercules News
Posts posted by PerfManJ
Larry, good catch on the tail stripe. The B-47 was a beautiful leap in aircraft design. It's strange to think that B-47 production was winding down as the C-130s started rolling out.
It appears repairable to me too at first glance. However, the location will make the effort much more difficult.
Perhaps it is a B-47 mod line? With that swept wing, the only other thing it could be is a JetStar, but that didn't fly until 1957 and it's too small anyway. My curiosity is peaked.
Are those B-47s in the background production line? I think that line ran through 1957.
The prop slipstream has a large effect on wing lift, especially at low speeds. This is referred to as the "powered lift" portion of the total wing lift. The magnitude of powered lift is typically correlated to "thrust coefficient" (Ct). It all comes down the difference between the free-stream air velocity and the induced air velocity behind the props: the larger the difference (think high power and low speed), the larger the contribution of powered lift. In those conditions, the loss of an engine would cause a rolling tendency toward the dead engine.
To get an idea of the powered lift present on the C-130, compare the normal and max effort takeoff speeds. Normal speeds are based on "power off" stall while the max effort speeds use the "power on" stall speed.
Correct, Bob. It is the HC-144A Ocean Sentry, based on the CN-235A.
China's finally trying a C-130 copy. It looks like a mash-up of an A400, C-141, and C-130. They are targeting a 30 ton payload which, to me, suggests a size closer to the A400.
First C-27J delivered to USCG...2nd coming soon. I was expecting to see it in the usually glossy white and orange/red paint job.
I thought it was a good overview of the major differences between the mil and civil C-130J versions. As I recall from previous articles, the LM-100J is based on the stretched C-130J-30 since that was the basis of the original L382J civil cert in the 90's. Articles and press releases tend to use "C-130J Super Hercules" as an all-inclusive term for the "C-130J" family of aircraft unless they are referring to a particular variant or customer (USMC = KC-130J, USCG = HC-130J, etc.)
More celebratory content from LM...
Willis Hawkins and the Genesis of the Hercules
Four Horsemen promo video
Employee stories about Herc connections
FADEC = Full-Authority Digital Engine Control
Basically a computer that controls engine operation based on input from the throttle quadrant. As polcat explained, there is a single "power lever" for each engine.Re-synching the props and reduced power takeoffs are also not required in the J.
The J could still benefit from reduced power takeoff, in terms of engine life. Unfortunately, all of the takeoff performance data is based on max power only.
This must be the major announcement. ASL Aviation Group (owner of Safair) intends to purchase up to 10 LM-100Js.
For flight ops related TOs, try eflightmanuals.com.
They may have some older maintenance manuals as well.
And International Air Response in Mesa, AZ (or are those retired military?)
There are also several L-100s in foreign military service.
Did the brakes hold while at 300 deg? Or did the heat dissipate quickly?
That much heat will reduce the RTO capacity, but then again the carbon brakes have a much higher capacity than steel. It depends which energy limit they are using for RTO and max brake landing plans.
The abbreviated USAF carbon brake test program used an E model...at Edwards (2300 ft MSL)...in the summer. So I don't think they ever even hit the T56 torque limit during the power-against-brakes tests. Wishful thinking that the brakes would hold on all C-130 models.
How much heat is required to remain static with takeoff power? Could a few taxi stops add enough energy to prevent creep, without reducing RTO capacity?
I found this while going through some of my LM stuff. It's a family tree of all the L382 versions up to 1986, including some serial numbers and differentiating details. Probably nothing new here, but I thought it might be of interest to the resident historians here. Good summary of the L382 lineage through the H model on one page.
It's a copy of a copy of a copy and I'm not sure of the original source. There are no LM markings, but the bottom right corner says "PAGAN 11-20-86"
There are rules of engagement.
Why do they want to shoot you down?
Are there snakes on the plane?
Just tip the wings and follow the F-16’s to a friendly airport.
Good point. Are the good guys in control of the plane? If the radios are out, rocking the wings is a sign of compliance with the interception by the F-16s.
I think you're right. Or was it Executive Decision? I can't remember. But it's definitely been done.
Thanks for joining in the conversation guys!
I think it was Executive Decision. They used the fax machine in Air Force One.
I like the safety valve. You'd have to climb all the way up on the ramp, but maybe instead of a flare, just use a flashlight or feed out a white flag. The F-16s might get the wrong message from a flare being shot in their direction.
Use the Nav lights to send Morse Code.
Didn't they do that in Air Force One?
The JATO bottle supply is running out and none have been produced for quite a while. That's why Fat Albert stopped doing JATO takeoffs in 2009.
I believe the LCs still use them when necessary on the snow, but they are seeking an alternative. On skis, sometimes they don't have enough power to accelerate up to takeoff speed so they need the extra thrust. In fact, that was the driver for testing the 8-bladed props (NP2000): The extra takeoff power would eliminate the need for JATO.
Here's another briefing from Rolls-Royce with some high-level differences: http://www.lockheedmartin.com/content/dam/lockheed/data/aero/documents/global-sustainment/product-support/2012HOC-Presentations/Monday/Mon%201550%20Habersham-Rolls%20Royce-Roy%20Griffin.pdf
AE2100D3 major improvements over T56:
Two shaft (eliminates need for safety coupling and NTS system, allows speed optimization of individual turbine stages)
Digital controls (FADEC, precise control and measurement)
Higher pressure ratio (reduced fuel consumption and more power at higher density altitude)
Reduced part count (maintenance and weight savings)
Improved aerodynamic efficiency of turbine blades (reduced fuel consumption)
What kind of "corrections" are you looking for? Most of the detail design and technical parameters are proprietary...
The Rolls-Royce website is a good place to start, with product sheets for both the T56 and AE2100:
C-130E = T56-A-7
C-130H = T56-A-15 (single shaft, mechanical controls)
L-100 = 501-D22A (commercial version of T56)
C-130J = AE2100D3 (two shaft, full digital controls (FADEC), higher flat rating than T56 (more power at higher density altitude))
C-130 News: Second C-130J Super Hercules Delivered To Republic Of Tunisia
I believe it's 5758.