Re: Hydrogen Powered Supersonic Concorde Replacement

On Dec 23, 11:08 pm, BradGuth <bradg...@xxxxxxxxx> wrote:
On Dec 22, 4:38 pm, Willie.Moo...@xxxxxxxxx wrote:



On Dec 23, 6:58 am,BradGuth<bradg...@xxxxxxxxx> wrote:

On Dec 22, 12:49 am, William Mook <william.m...@xxxxxxxxxxxxxxxxx>
wrote:

Since liquid nitrogen and liquid oxygen have different densities and
different boiling points, it is theoretically possible that the
nitrogen may be removed and oxygen passed through the engine while the
nitrogen is passed around the engine and heated to a lower
temperature.

Oxygen: -297F 71.2 lbs/ft3
Nitrogen: -321F 50.5 lbs/ft3

As you know, at the -297F of LOx the element of N2 is still a gas, and
as such easily excluded, on the fly(sort of speak). In which case
you'll have yourself a full blown H2/O2 scramjet that'll fly
suborbital for as long or as far as your onboard cache of LH2 holds
out.
- Brad Guth

Surprisingly - CORRECT!

You are "Surprisingly - CORRECT" on any number of facts that'll make
it possible to utilize those clean hydrogen products as obtained from
all of those nifty Mook arrays of PV cells.

Mook's "Hydrogen Powered Supersonic Concorde Replacement" is actually
technically doable, though somewhat technologically spendy and without
all that much passenger or freight hauling capacity of its fast but
limited cruising range, unless that new and improved form of fast air
transport so happens to use a pair of those fully reusable LRBs
that'll get flown back to their original tarmac.

Getting that fully loaded tarmac tonnage up to the scramjet velocity
and of that suborbital altitude of as great as 100,000' is going to
demand 2/3s if not 3/4s of the stored energy as parked on the tarmac.

At least without all that much passenger or freight hauling capacity,
nor those takeoff LRBs and with such a volume of empty LH2 fuel
tankage containing H2 vapor, as such your mostly composite craft
should make for a darn good blimp like buoyancy compensated glide path
ratio of perhaps as great as 32:1, though even a 16:1 ratio would be
impressive.
- Brad Guth

You state a lot of numbers, could you carry out the calculations? You
know using something like the Breguet range equation and so forth?

http://en.wikipedia.org/wiki/Breguet_equation

Of course not - because all you do is engage in black propaganda by
throwing out numbers that intend only to confuse and confound in a way
that marginalizes the reality beneath.

Fact is, long range aircraft today carry around 47% of its total mass
as fuel.

http://en.wikipedia.org/wiki/Fuel_fraction

With hydrogen this is reduced to 15% - which means 22% of the total
weight of the aircraft is available for something else - more payload,
more fuel, more structure, all three - WITH THE SAME TAKE OFF WEIGHT

So, your comments don't make any sense in light of these facts.

Aircraft using fuel that is 3.2 times more energetic per kg than jet
fuel cannot help but have improved performance in ALL dimensions,
RANGE, SPEED, CLIMB RATE, PAYLOAD - despite larger fuel volumes and
tank masses required by hydrogen when compared to jet fuel.


.

Relevant Pages

  • Re: A-7 nostalgia
    ... A/B and enough fuel to support a bit of usage, ... efficiency of payload and endurance which made the A-7D and E ... engine in the airframe. ... What made the A-7 a high endurance aircraft was the turbofan engine ...
    (rec.aviation.military)
  • Re: Any hope? ST (Itlaian) ST .25 ? (ATTN: LONG)
    ... Super Tigre carburetor adjustment procedure ... The Super Tigre carburetor has two needle valves for adjusting fuel ... left of the carburetor throat (as viewed from rear of engine). ...
    (rec.models.rc.air)
  • Re: Mustang GT and K&N air charger
    ... Even when replacing the air filter ONLY to a higher flow ... I dug out the Ford shop manual for a 1999 Mustang 2V 4.6 Liter engine. ... throttle plate are the MAF sensor and air temperature sensor. ... Fuel Pressure Sensor ...
    (rec.autos.makers.ford.mustang)
  • Erfahrungsberich Leanen
    ... entitled "Fuel Mixture Leaning Procedures." ... Within 3 minutes of takeoff, and with power at 65-75%, ... if the engine reliability was adversely affected. ... the first power reduction following takeoff or at power reduction for let ...
    (de.rec.luftfahrt)
  • Re: outboard oil mix
    ... Detonation is the collision of two simultaneous spreading flame ... the fuel is burning before the piston starts its downward travel. ... engine a trip. ... oil was added to the fuel at fueling time, which made the fuel air ratio ...
    (rec.boats.building)