Robin, The required water could be retrieved from the atmosphere during the flight, e.g. by condensation. I guess we need a few figures and statistics whether this is feasible though.
On Monday, December 31, 2012, wrote: > In reply to Alain Sepeda's message of Sun, 30 Dec 2012 22:54:02 +0100: > Hi, > [snip] > >Their idea is to use hybrid propulsion... > > > >LENR have huge autonomy, but LENr and worse, turbines, have low power > >density.... > >Since peak power is huge with planes, while average is lower, it is > >rational to store energy... > > > >in the report they propose batteries... > > > Given the huge weight savings in fuel, perhaps the lower efficiency of > steam > turbines can be lived with? > > The problem with generating Hydrogen on the spot is that all the Hydrogen > required needs to be carried in the form of water, which once again adds a > huge > amount of weight, since the energy liberated in the turbine is normal > chemical > energy, implying much more water than conventional fuel (assuming it can't > be > condensed & reused once it has been through the gas turbines). > > All in all, my generator would be better. Energetic alphas generated > through > fusion as required, and used to heat in-flowing air to produce thrust in an > almost conventional gas turbine. About a lb of fuel would easily take a > fully > laden 747-8 around the planet, non-stop. > [snip] > > Regards, > > Robin van Spaandonk > > http://rvanspaa.freehostia.com/project.html > >
