[Phys-L] Re: Newton's Equation - 2 or 3 terms?

[Bernard Cleyet <anngeorg@PACBELL.NET>]

Those rockets underwent numerous design changes * ;  BW's sites were, from
what I found, the final one for the V1.  In an initial one the fuel was
delivered by pressurizing a not full tank.  Also a very early version
"flew" under the Brit. RADAR.  The final? V2 ** version used a room temp.
oxidant so set up would be quicker and more convenient (less than six
hours).  It was decided early on not to have fixed launch locations for
the same reason the minuteman? used (uses?) rail cars.

Trivium:  WvB had problems, because higher ups suspected he wanted to
put a man on the moon even to escaping to UK where he could indulge his
fantasy, not kill the enemy, or at least that's the excuse they used to
temporarily put him under arrest.  "His" existing technology was
sufficient for IRBMs (2500 miles).  There was "infighting" over control
of the rocket projects.

here's a general rocket engine site for those w/time on their hands:


http://www.vectorsite.net/tarokt1.html

* One V1 had a cockpit for suicide missions; tho one site wrote the
pilot was to bail out at "the last min."

** wrong:  designed not built (acid oxidant)

bc, who thinks facts are irrelevant to the F = M A  point.

p.s. bc attended a colloquium on buzz engine efficiency at NPS recently.

Brian Whatcott wrote:

> At 09:11 PM 9/5/2005, Bernard,  you wrote:
>
>
> > If the burning area increases, e.g. from the cross section to conical,
> > the F increases.  It will then decrease as the initial burning part
> > exhausts. Whatever, the mass decreases and not at a constant rate.  The
> > early cruise (V 1) and the ballistic (V 2)  missiles,  I assume, used
> > pressure feed  (liquid fuel), in which case the force decreased as the
> > fuel exhausted.  What ever happens, w/ modern tech. the computer will
> > compensate.
>
>
> The V1 was a pulse jet firing 80 octane gasoline in atmospheric air.
> Compressed air bottles ran the gyro autopilot, and (presumably)
>   motivated  the gasoline sprays.   It cruised at 400 mph at
>   9000 ft or less.
> [ from  <http://www.fiddlersgreen.net/aircraft/WWII/v1/v1_info/vi_info.htm> ]
>
>
>
> The V2 was propelled by alcohol (a mixture of 75% ethyl alcohol and
>   25% water), and liquid oxygen fuel. The two liquids were delivered
> to the thrust chamber by two rotary pumps, driven by a steam turbine.
>   The steam turbine operated at 5,000 rpm on two auxiliary fuels,
>   namely hydrogen peroxide (80 %) and a mixture of 66% sodium
>   permanganate with water 33%. This system generated about
>   55,000 lbs (24947 kg) of thrust at the start, which increased
>   to 160,000 lbs (72574 kg) when the maximum speed was reached.
>   The motor typically burned for 60 seconds, pushing the rocket
>   to around 4,400 ft/second (1341 m/sec).
>    It rose to an altitude of 52 to 60 miles (83 to 93 km) and had
> a range of 200 to 225 miles (321 to 362 km). The V2 carried an
>   explosive warhead (Amatol Fp60/40) weighing approximately
> 738 kg (1 ton) ...
>
> [from  <http://www.v2rocket.com/start/makeup/design.html> ]
>
>
> Brian Whatcott    Altus OK    Eureka!
_______________________________________________
Phys-L mailing list
Phys-L@electron.physics.buffalo.edu
https://www.physics.buffalo.edu/mailman/listinfo/phys-l