C-130 rocket assisted takeoff length

In article ,
"Gord Beaman" ) writes:
(Peter Stickney) wrote:

In article ,
(George) writes:
Hi all.
Does anyone know C-130 rocket assisted takeoff length?

Is it possible that it can be 30 meters (100 ft)?

Not with a loaded Herc, and the standard JATO setup.

From the Standard Aircraft Characteristics Chart for the U.S. Navy
C-130G (The same thing as a USAF C-130E, but the Navy wouldn't use the
same subtype letter, would they? )

The normal JATO fit are 8 1000-KS-14 JATO bottles, which give you
1000# thrust for 14 seconds.

Takeoff ground run, no wind, Standard Day Sea Level at 155,000# weight
(Max payload)
4125' without JATO, 3565' with HATO
Distance to clear a 50' obstacle:
5810' without JATO, 4812' with JATO.

Note that the extra thrust doesn't help the ground run very much, but
does help the initial climbout quite a bit.

Peter, what did they do to the Herc that they flew off of the
Forrestal(?) ? (without JATO at that!)

Gave it a 40 kt headwind! It should be pointed out that the data I
gave was for a 155,000# C-130G (or E, if you're USAF). The Forrestal
flights wre made by a KC-130F, which was the Marine Corps
Tanker/Transport flavor of the C-130B. The B models had the same
egnine as the later E models, but their max weight was 135,000# rather
than 155,000#.

--
Pete Stickney
A strong conviction that something must be done is the parent of many
bad measures. -- Daniel Webster

"Gord Beaman" wrote in message
news
Peter, what did they do to the Herc that they flew off of the
Forrestal(?) ? (without JATO at that!)
--

-Gord.

Still around as a USMC KC-130.

Tex

On Sun, 19 Oct 2003 19:19:11 GMT, Guy Alcala
wrote:

" wrote:

Michael Williamson
wrote:

wrote:

Peter, what did they do to the Herc that they flew off of the
Forrestal(?) ? (without JATO at that!)

Well, it does help with ground run if you can guarantee a 30 kt
wind down the runway every time...

Mike


That's true isn't it?...one tends to forget that ~30 knots is a
LOT of airspeed gain, especially at the top of the take-off roll
range, takes a comparatevly long time to gather that extra speed.

An a/c that you normally rotate at 105 you now rotate at 75
(well, not really but you get my drift)

There's also the advantage that you don't have to pull G off the end of
the deck, in order to leave the 'ground' and climb over obstacles.
Indeed, you can even sink a bit. And of course, the a/c was almost
certainly nowhere near MTOW -- max. landing weight (8fps) is only
130,000 lb., vice the 155,000 or 175,000 lb. MTOW, and I imagine the
a/c was well under max. landing weight when it landed. The Herc's
power-on stall speeds (100% flaps) at landing weights are under 100
knots. For instance, at a landing weight of 110,459 lb. it has power
off/on stall speeds (100% flaps) of 80/65 kts. At 122,586 lb. they're
91/75 kts. 50% flaps would be used for takeoff, but even with no wind,
at a t/o weight of 100,000 lb. the a/c has a ground run of only 1,500
ft. at sea level. Add 30 kts or more of wind over deck and the Herc's
ability to land or takeoff from a large deck carrier isn't a surprise.

Guy

And, if you have a 15 knot wind, you can easily get 45 kts over the
deck. I never asked Adm Flately what the wind conditions were, and I
always regretted it :-(

Al Minyard

"Tex Houston" wrote:


"Gord Beaman" wrote in message
news
Peter, what did they do to the Herc that they flew off of the
Forrestal(?) ? (without JATO at that!)
--

-Gord.

Still around as a USMC KC-130.

Tex

Oh yes indeed, Quite successful, I have the film clips here,
impressive. Didn't look like it dropped at the end of the deck
either, seemed to be climbing smartly.
--

-Gord.

Alan Minyard wrote:


And, if you have a 15 knot wind, you can easily get 45 kts over the
deck. I never asked Adm Flately what the wind conditions were, and I
always regretted it :-(

Al Minyard

Yes, must have been fun talking to him about it...pretty
impressive feat.
--

-Gord.

"Steve R." wrote in message
...
The 130J isn't set up for Jato. Those Dowty props and RR engines really
toss
it in the air without it though!
Steve

I can't speak of the distance that a Jato C-130D took since it was on snow
(skibird) but you tried to bounce the nose into the air at about 60kts.
When the ski cleared, it emmediately popped to about 90kts and you popped
the 8 jato bottles and were airborne and going up. That is got to be the
hairiest ride ever.