Abstract In the frame of RETALT (RETro propulsion Assisted Landing Technologies) project, aerodynamics reusable launch vehicles reentering atmosphere and descending landing with aid retro are studied. particular, series wind tunnel tests performed to assess aerodynamic properties such a vehicle in various flight phases from hypersonic supersonic re-entry down subsonic conditions at touch down. ...

1 0-7803-6599-2/01/$10.00 © 2001 IEEE 2 Updated October 21, 2000 Abstract—An inverting control system adaptive to failures was recently flight demonstrated on the X-36 unmanned tailless fighter technology demonstrator. This technology has since been applied in simulation to study the potential to improve the performance and reliability of fully reusable launch vehicles. A new technique known as...

Activated DMA-directed DNA synthesis catalyzed by Rauscher leukemia virus (RLV) and other type C mammalian retroviral DNA polymerases is uniquely stimulated by biologically active polyamines. Cationic trypanocides may act as antagonists of polyamine function. As described here, several cationic trypanocides stimulate RLV polymerase-catalyzed DNA-directed DNA synthe sis at concentrations signifi...

A method for onboard generation of entry trajectory for variable targets is discussed. Conventional trajectory planning algorithms can only be used for the fixed terminal conditions without considering the variable targets. In case the vehicle needs to alert the entry trajectory due to damage or effectors failure, the entry guidance system must real-time design a feasible entry trajectory accor...

Transatmospheric vehicles (TAVs), with aerodynamic properties similar to conventional aircraft, have the promise of flying into space and delivering payloads into low earth orbit (LEO). A key distinguishing feature between TAVs and aircraft is propulsion. Jet engines or pure air-breathing propulsion systems cannot provide the thrust levels needed to ascend into space. Traditional rockets overco...

response to anemia induced in mice with RLV (2). The present report offers further evidence to support and extend this observation. Our previous work has involved the study of an anemia-inducing isolate of RLV obtained from BALB/c mice bearing a transplantable leukemia (3) that induces a progressive, fatal anemia with splenomegaly and hepatomegaly resulting from the accumulation of erythroblast...