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C-130 rocket assisted takeoff length
Hi all.
Does anyone know C-130 rocket assisted takeoff length? Is it possible that it can be 30 meters (100 ft)? Thanks. |
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"George" wrote in message
om Hi all. Does anyone know C-130 rocket assisted takeoff length? I think normal JATO take off distance would be in the range of 800-1000 ft. depending on load. Is it possible that it can be 30 meters (100 ft)? The CREDIBLE SPORT aircraft modifed for a second Iranian hostage rescue attempt were supposed to take off with about a 100-ft ground roll. They used a massive amount of rocket assist, far more that the usual RATO units. A couple of descriptions of Credible Sport: http://home.earthlink.net/~quade/crediblesport.html http://www.spectrumwd.com/c130/artic...ible_Sport.htm and pictures: http://www.spectrumwd.com/c130/new-pics/dec.htm -- Tom Schoene Replace "invalid" with "net" to e-mail "If brave men and women never died, there would be nothing special about bravery." -- Andy Rooney (attributed) |
#3
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George wrote:
Hi all. Does anyone know C-130 rocket assisted takeoff length? Is it possible that it can be 30 meters (100 ft)? Thanks. The SAC for the Navy C-130G (equivalent to the C-130E IIRR) is online. Normal vs. Jato (8 x 1,000 lb. thrust ATO rockets) t/o runs (in feet) at weights of 155,000 (normal max., 2.5g) and 175,000 lb (overload, 2.25g): Calm, ISA @ SL, Military rated power and 50% flaps. 155,000 lb: 4,125/3,565 feet. 175,000 lb: 5,390/4,750 feet. The C-130H values should be somewhat less, as it had more powerful engines but the same max. weights. I don't know how the C-130J stacks up for t/o. Guy |
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The 130J isn't set up for Jato. Those Dowty props and RR engines really toss
it in the air without it though! Steve "Guy Alcala" wrote in message . .. George wrote: Hi all. Does anyone know C-130 rocket assisted takeoff length? Is it possible that it can be 30 meters (100 ft)? Thanks. The SAC for the Navy C-130G (equivalent to the C-130E IIRR) is online. Normal vs. Jato (8 x 1,000 lb. thrust ATO rockets) t/o runs (in feet) at weights of 155,000 (normal max., 2.5g) and 175,000 lb (overload, 2.25g): Calm, ISA @ SL, Military rated power and 50% flaps. 155,000 lb: 4,125/3,565 feet. 175,000 lb: 5,390/4,750 feet. The C-130H values should be somewhat less, as it had more powerful engines but the same max. weights. I don't know how the C-130J stacks up for t/o. Guy |
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Credible Sport actually got airborne in much less than 100ft. More like 2
1/2 - 5 tire revolutions. Les The CREDIBLE SPORT aircraft modifed for a second Iranian hostage rescue attempt were supposed to take off with about a 100-ft ground roll. They used a massive amount of rocket assist, far more that the usual RATO units. A couple of descriptions of Credible Sport: http://home.earthlink.net/~quade/crediblesport.html http://www.spectrumwd.com/c130/artic...ible_Sport.htm and pictures: http://www.spectrumwd.com/c130/new-pics/dec.htm -- Tom Schoene Replace "invalid" with "net" to e-mail "If brave men and women never died, there would be nothing special about bravery." -- Andy Rooney (attributed) |
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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) -- -Gord. |
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" 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 |
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