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AUz, post: 11389654, member: 32092 Wrote:@SOHEIL What happened to Iran's space program?
Simorgh has been a failure again and again, and even latest Safir launch was a failure. No new systems, no improvement of technologies, nothing.
At one point it was looking promising for Iran. What happened?
Same goes for nuclear and missile programs of Islamic Republic. Why??
Any chance we would see something new soon from Iran?
Quote: March/April 2004
IL Aerospace Technologies (ILAT) is based in Zichron Ya'akov, Israel, and is led by Dov Chartarifsky. Recently it has unveiled its new X Prize competition vehicle design now called "Negev" (formerly named Negev-5). Aside from the name, the vehicle's configuration has gone through several design iterations in the last few months. These modifications originated from a fresh set of innovative concepts derived from ILAT's recently formed technical team and advisory committee.
The Negev will be launched from ground level using a helium balloon as a first stage. This unconventional approach allows the vehicle to hitchhike a free ride to its intended rocket launch altitude of 10 Km (32,808 feet) above sea level, and overcome most of the atmospheric drag while saving precious fuel. This high-altitude launch concept makes it possible to design a smaller, lighter, simpler, and more efficient vehicle, hence satisfying the criterion for practical low-cost space access.
Once the altitude for rocket ignition is reached, the vehicle will be detached from the balloon initiating the staging process. The vehicle will drop for 3 to 5 seconds before the solid rocket motor ignites, creating a negative velocity of 50m/s. At the same time, the balloon will immediately sense the sudden ballast change and spring upwards, separating itself away from the vehicle to a safe distance. The on-board computer will control the firing of the 77.8 kN (17,500 lbf) solid rocket motor. The burn will last about 96 seconds at around 78% thrust, accelerating the vehicle to Mach 3.54 (1165.5 m/s). The altitude at burnout will be 49.6 Km (162,730 ft), while the G-force applied to the passengers will reach a maximum of 4.3 prior to burnout. After engine cut-off, the vehicle will continue to cruise pass the 100 Km (328,084 ft) mark where the crew will begin to experience weightlessness conditions for about 4 minutes. At approximately 120 Km (393,701 ft), all forward inertia will be depleted and the vehicle will start to free-fall back to earth.
The attitude of the vehicle will remain the identical to the one during the ascent phase. At an altitude higher than 70 Km (229,659 ft), the nose sphere will detach from the capsule but will remain connected by a cable, thus serving as a stabilizing element during the reentry phase. The maximum deceleration force will peek at ~5.81 G's at 23.6 Km (77,428 ft) into the decent. At an altitude of 5 Km (16,404 ft), at a velocity of around 85m/sec (190 mph), the parachute sequence will start by pyrotechnically deploying both drogue and main chutes sequentially. This altitude is high enough to allow redundant sequences in case of primary system failure. With the main chute fully open, the vehicle will slow down to a mere 7 m/sec before splashing down to the sea.
https://archive.is/scOiS/78bf6afb2a4f607...58bef2.gif ; http://archive.is/scOiS ; http://www.lunar.org/docs/LUNARclips/v11...rize.shtml ; http://www.lunar.org/docs/LUNARclips/v11...evLogo.gif
▲ 1. IL Aerospace Technologies's X Prize competition vehicle Negev Logo
http://web.archive.org/web/2004072200480...II_ezr.jpg ; http://web.archive.org/web/2005030512361.../ilat.net/
▲ 2. Negev suborbital space mission specifications. As accessed in 2005.
Quote:The twelve prototypes of Louis Blériot
Starting from February 1907, Blériot had designed another airplane, made in the workshop of Neuilly. Like the type V, the Blériot VI includes a fuselage of square section stretched by cloth-like cord, with wings of varnished paper
Les douze prototypes de Louis Blériot, Gérard HARTMANN, p8