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Topic: VTOHL

	Some Thoughts On Reusable Launch Vehicles (Site not responding. Last check: 2007-11-05)
		The second VTOHL vehicle, consisting of a reusable first stage and expendable upper stages, would be the easiest to obtain if a reusable spacecraft were not developed.
		A final VTOHL system would employ expendable outboard propellant tanks that are jettisoned once their load has been consumed by a reusable combination spacecraft/launch vehicle in the center.
		An additional advantage of this kind of system over a rocket- propelled VTOHL is that the same air-breathing engines could be used during both the launch and the flyback phases, thus enabling a lighter overall system.
	www.airpower.maxwell.af.mil /airchronicles/aureview/1970/nov-dec/holder.html (3390 words)

	Next Generation Launch Vehicles
		VTOHL is problematic for a number of reasons.
		Firstly, a VTOHL vehicle is incapable of performing "continuous intact abort" for a period of time after launch, i.e.
		Also, because it takes off vertically and lands horizontally, a VTOHL vehicle has to be built to withstand stresses both along and across its frame.
	www.kilnet.freeserve.co.uk /earthlaunch.htm (1340 words)

	Rockets vs Space Planes
		The X-33 takes exactly this approach, of course, and it should be noted that one of the losing entries, the DC-X, was a VTOL SSTO proposal and the only one to have actually had a prototype build and flown.
		Secondly, once a VTOHL vehicle has taken off, there's a period of time during which it can't easily recover from a failure.
		The Challenger disaster was a vivid demonstration of this problem of VTOHLs, and they're unlikely ever to be satisfactory for passenger-carrying.
	www.aerospaceguide.net /rocketsvsplanes.html (1428 words)

	Affordable Space Flight - NASA Presentation, Part 1
		All three were examined for both Single Stage To Orbit (SSTO) and Two Stage To Orbit (TSTO) flight.
		This particular chart, which was developed in Phase 1 of this study, is for an unmanned prototype, Vertical Take-Off Horizontal Landing (VTOHL) lifting body, that has two Space Shuttle Main Engines (SSME) rocket engines and a Gross Take-Off Weight (GTOW) of 600,000 pounds.
		User cost is shown on the Y-axis and useful payload to Low Earth Orbit (LEO) on the X-axis.
	www.affordablespaceflight.com /nasa1.html (1478 words)

	Re: Retro designs
		These folks were loudly objecting that NASA's conceptual design work for the shuttle was too strongly slanted towards the large 2-stage VTOHL fully reusable shuttle, the one with the humongous winged flyback booster, and that competing SSTO designs were being unfairly treated.
		NASA, of course, had no interest either in VTOVL vehicles or SSTOs while shuttle Phase A and B work was going on in 1969 thru 1971.
		We eventually got the partially reusable VTOHL shuttle with the large ET and strap-on SRBs, a design that has turned out to be hazardous to the health of the astronauts.
	www.usenet.com /newsgroups/sci.space.shuttle/msg04055.html (452 words)

	Doors to Diplomacy 2005 Project - Space (Site not responding. Last check: 2007-11-05)
		Strictly speaking there's also VTOHL (Vertical Take-Off, Horizontal Landing), of which the most obvious example is the Space Shuttle.
		Another problem with VTOHL is that while the wings help the vehicle on re-entry, they are effectively dead weight on the way up.
		A sea-launched sub-orbital VTOHL rocket using LNG/ LOX engines, the CAC-1 was intended to carry six passengers from port city to port city as a rapid transit service, a transatlantic flight taking about 12 minutes.
	www.musif.tuiasi.ro /~lucianc/thoughts_vehicles.html (6814 words)

	wiki/STOVL Definition / wiki/STOVL Research (Site not responding. Last check: 2007-11-05)
		VTOHL Vertical Take-Off Horizontal Landing describes planes that can lift off vertically but land in the traditional manner.
		While many VTOL aircraft can operate in this fashion, some planes must land normally after taking off vertically due to a vertical landing either being impossible (requiring a structure to orient it vertically for take off) or impractical (compexities and power requirements in decending on engine power with no horizontal velocity)....
		Except Yak-38, none of these has reached operational status, though the JSF is expected to enter service by 2010.
	www.elresearch.com /wiki/STOVL (796 words)

	Space & astronomy - Retro designs
		2-stage VTOHL fully reusable shuttle, the one with the humongous winged
		the partially reusable VTOHL shuttle with the large ET and strap-on SRBs, a
		that Lockmart's VTOHL design won the X-33 competition in July 1996.
	www.spacebanter.com /q-t_4648-Retro-designs.html (1487 words)

	Re: Retro designs
		These folks were loudly objecting that NASA's conceptual > design work for the shuttle was too strongly slanted towards the large > 2-stage VTOHL fully reusable shuttle, the one with the humongous winged > flyback booster, and that competing SSTO designs were being unfairly > treated.
		NASA had changed its > mind about SSTOs and decided that this should be the X-33 baseline.
		No surprise that Lockmart's VTOHL design won the X-33 > competition in July 1996.
	www.usenet.com /newsgroups/sci.space.shuttle/msg04076.html (142 words)

	[No title]
		Althought there is no known engines that work like this, it has been therorized for 20+ years with the Aurora.
		I really think you should consider a VTOL or VTOHL if you want to keep it in COTS/modern tech relm.
		I was thinking of only using the phases of turbojets for takeoff and ascent to ~ 18km, then rocketting the rest of the way.
	www.orbitersim.com /Forum/Default.aspx?g=posts&t=11959 (4705 words)

	Space Transport - Future Technology that will make space access affordable, safer and regular.
		One would like to combine best of both worlds by using a VTOHL design.
		But it is not so easy.The U.S.Space Shuttle uses this approach but it is not a single stage vehicle.
		Lockheed Martin's Skunkworks hope to solve the problems associated with VTOHL by doing away with the wings.
	www.geocities.com /spacetransport/tech.html (1098 words)

	VTOHL - Encyclopedia Glossary Meaning Explanation VTOHL (Site not responding. Last check: 2007-11-05)
		Here you will find more informations about VTOHL.
		If you find this encyclopedia or its sister projects useful,
		Examples include the German rocket plane, Heinkel P.1077, and Space Shuttle.
	www.encyclopedia-glossary.com /en/VTOHL.html (119 words)

	Why Are Launch Costs So High
		Raymer mentions the F-4 Phantom as a negative example, because in order to remove the radio, which was a common operation, one first had to remove the ejection seat, which was frequently damaged during removal.
		An airplane can do taxi tests, then low speed flights, and gradually "expand the envelope" to find out if there are problems before committing to performing at the limits it was designed for.
		The only vertically launched rocket I know of that was able to do this was the DC-X. A VTOHL rocket that lifts off the pad is committed to making the transition to horizontal flight in order to land safely, and has no way to abort testing of the transition maneuver.
	home.earthlink.net /~peter.a.taylor/launch.htm (11360 words)

	Why Are Launch Costs So High (Site not responding. Last check: 2007-11-05)
		Raymer mentions the F-4 Phantom as a negative example, because in order to remove the radio, which was a common operation, one first had to remove the ejection seat, which was frequently damaged during removal.
		An airplane can do taxi tests, then low speed flights, and gradually "expand the envelope" to find out if there are problems before committing to performing at the limits it was designed for.
		The only vertically launched rocket I know of that was able to do this was the DC-X. A VTOHL rocket that lifts off the pad is committed to making the transition to horizontal flight in order to land safely, and has no way to abort testing of the transition maneuver.
	www.ghg.net /redflame/launch.htm (11360 words)

	Geek Trivia: Full (moon) circle
		Back in the mid-'70s, NASA published a 2000+ page study of the future of the space program beyond Apollo.
		In that study (which I've LONG since lost), NASA evaluated dozens of concept vehicles, almost exclusively reusables; vertical-takeoff/landing (VTOVL) craft, single-stage-to-orbit VTOHL craft, the works.
		NASA would get four Orbiters and the Air Force would get one that would operate out of Vandenberg AFB, in So Cal. However, long before Jan '86, the DOD bailed on the STS.
	techrepublic.com.com /5208-6230-0.html?forumID=6&threadID=182195&messageID=1862013 (737 words)

	Alphabetic Index - v
		V-2 VTOHL - Spacecraft - Manned - Spaceplane - China
		VTOHL 45t - Winged orbital launch vehicle - USA
		VTOHL 9t - Winged orbital launch vehicle - USA
	www.astronautix.com /alpha/alpndexv.htm (2678 words)

	Reviews One (Site not responding. Last check: 2007-11-05)
		The controversy is centred on the selection of a "Shuttle II" type craft over the much more economical DC-X vertical take-off vertical landing (VTOVL) craft tested during the last two years.
		Shuttle II is very much like Shuttle I: Vertical take-off horizontal landing (VTOHL), expensive, and guaranteed to stay in government hands.
		Stine goes a bit into the process by which Shuttle II was selected over VTOVL designs, stating that "...
	www.ideatree.com /reports/reviews1.html (2691 words)

	rocket engines, inter-net.com (Site not responding. Last check: 2007-11-05)
		Working in highly interactive groups students will learn through experience how to interact with other engineers by designing, fabricating, and testing rocket engines and launch vehicles.
		Off Horizontal Landing (VTOHL) lifting body, that has two Space Shuttle Main Engines (SSME) rocket engines and a Gross Take-Off Weight (GTOW) of 600,000 pounds.
		User cost is shown on the Y-axis and.
	www.inter-net.com /gnome_results/q1=rocket_engines&q2=&q3=&q4=&q5=&u1=o1&u2=d2&u3=y3&u4=w4&u5=l5&f=searchemall&r=r&e=10&d=d&t=5&p=23&s=3&g=1&q6=&q7=&q8=&q9=&q10=&u6=s6&u7=h7&u8=m8&u9=r9&u10=g10&o=gnomesrch (2136 words)

	vtol aircraft
		The aircraft had to be designed to operate from existing naval
		List of VTOL aircraft Types of take-off and landing CTOL STOL STOVL VTOL VTOHL V/STOL CATOBAR STOBAR CATO JATO / RATO ZLL / ZLTO This is a list of.
		Bell Agusta BA609 Tiltrotor VTOL Aircraft, Italy / UK / USA.
	digilander.libero.it /pc_engine/vtol-aircraft.html (183 words)

	Rocket Man Blog: A Readers Rebuttal (Site not responding. Last check: 2007-11-05)
		Maybe companies such as Scaled Composites are looking at this as the next market beyond the space tourism crowd.
		And extrapolating that thought - if there is an actual market for fully reusable sub-orbital vehicles, it seems like a VTOHL or HTOHL design would be a winner - trading vertical landing and orbital speeds for the ability to operate from standard airfields.
		Just thinking out loud - I haven't thought of this from a market perspective before.
	www.rocketmanblog.com /2004/02/a_readers_rebut.html (5325 words)

	Spacelift: Suborbital, Earth to Orbit and On-Orbit
		Black Horse, in contrast, achieves the same effect through aerial refueling.
		The disadvantages of the vertical takeoff horizontal landing (VTOHL) are that the wing, landing gear and associated structure are dead weight throughout all but the final few minutes of flight.
		Other arguments are occasionally raised in favor of vertical launch systems.
	www.fas.org /spp/military/docops/usaf/2020/app-h.htm (17442 words)

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