OTRAG Rocket.pdf

A controller in the pitch and yaw axis was targeted by throttling individual thrust engines.
An engine failure is met by the shut down by the focal point symmetry located engine. A
disadvantage of this approach is that retained by the reactors and switching off of engines
larger quantities of fuel in the tanks, which of the other engines can not be used. They
thus increase the empty weight considerably. The roll control is considered first, the
engines of the outermost ring at 10 degrees to the thrust axis to install. A reduction of the
thrust of one engine then causes a rolling of the whole rocket. Later we took an additional
cold-gas system in the eye.
No text to roll the tanks allow a staging by the next stage of rolling out the scaffolding
surrounding the stage out. , the respective upper stage by 5 runs per CPMR (module) to
the respective lower level based, so they "slip" is not down but up at ignition start out.
The separation takes about 2 seconds.
There is no Vorbeschleunigungstriebwerke, which earn a start in zero gravity, the fuel on
the ground. Since the first furfuryl alcohol in the combustion chamber must flow, the
stage will be ignited hot, ie The upper stage will be ignited, while the lower one is still in
operation. The staging was therefore not when the fuel is exhausted, but the rocket had
reached a predetermined speed.
Over the last step is a central computer that has like other missiles on the object to control
the rocket. He should have a gyroscopic system to detect the accelerations. This was used
to calculate the speed and location of the rocket. The control was carried out by a
conventional program, which directs the rocket to a predetermined target trajectory. The
engine controls were driven by a 600 channel radio transmitter / receiver. Today Kayser
would use in their own words for this WLAN. The first and second stage should be
operated until the fuel is exhausted. This should be possible accurately to 0.1%,
according to Kayser. The third stage is switched off when the desired final speed. This
should be possible with an accuracy of 0.01 seconds.
Test flights of the smaller versions have been controlled by the program and were
stabilized aerodynamically. Interference torques about the roll axis are considered
because of the high Kayser Bausymmetrie the bundled modules to be very low. They
should be compensated for by a tangential thrust cold-gas system in each stage
For the development of a missile with 2 t GTO payload would have OTRAG used about
500 million marks, or about a quarter of the Ariane development costs. Such a support
should be developed within 10 years. Later, the OTRAG employ up to 2,000 people
directly and save 40,000 jobs in supplier companies. If the rocket OTRAG become truly
successful, it would have been certainly the most scalable and most cost carrier.
Variants of the OTRAG Launch Vehicle
As already explained, it would be possible to launch any payload through an appropriate
combination of modules. Kayser has submitted the following standard sizes. They differ