is this what you are talking about???
this is what i found...
check out page 50 of this preview of a book..
http://books.google.com/books?id=lU...nepage&q=ju 88 mistel guidance system&f=false
also
from
JUNKERS JU 88 "MISTEL"
Early in 1943 the idea took on a new form: a piloted Bf 109 fighter mounted on top of an unmanned explosive-laden Ju 88 bomber by means of supporting struts. This was the Mistel. The pilot in the upper machine was to control the combination; when he got to the target he would put the combination into a 15 degree descent and aim the whole lot at the target. At a range of about three quarters of a mile from the objective he was to separate his fighter from the lower component and climb away, leaving the latter to fly straight on under control of the automatic pilot until it impacted. The fighter pilot was then to return to base in the normal way.
Thus far the Mistel idea had little to commend it, for the expenditure of one Ju 88 bomber to deliver a mere 3 ton warhead to a target was a grossly uneconomical method. But if a special warhead could be fitted to the explosive aircraft, a warhead which could punch through almost any protective layer of armor, the possibilities became very attractive.
THE HOLLOW CHARGE
The warhead fitted to the Mistel was of the hollow charge type. Such warheads were used a great deal during the war against tanks. But with the Mistel a hollow charge warhead weighing 7,700 pounds - far larger than any built before or since - was to be used. Below is an early Mistel 1 combination, with the hollow charge war- head fitted in place of the crew compartment of the Ju 88 lower component. This warhead, seen below on a Mistel 1, was capable of "drilling" a hole clean through the hull of even the most heavily armored warship.
The hollow charge, as fitted to the Mistel, was intended to blow a hole through the thick steel armor of a battleship. The shape of the 3,800 pound explosive charge was important. At the front end of the explosive charge was a cone-shaped hollow cavity which was lined with a layer of soft metal-either copper or aluminum. It was important that a soft metal be used for this liner, since a harder metal would prevent the hollow charge action from developing properly. Four electrical crush fuses, for firing the detonator of the main charge, were mounted at the end of the nine foot long stand-off probe which protruded from the front of the warhead; the detonator for the main charge was situated at the rear of the warhead. When the stand-off probe hit the target the crush fuses operated, set off the detonator, and thus fired the main charge. Because of its shape and the fact that it was burning from the rear forwards, the force of the main charge was focused on to the soft metal liner. The liner became fluid, and was pushed forward from the centre of the cone in a fine jet. A split-second later the hollow charge action had developed completely. The metal in the liner was now "squirted" forwards in a stream about one foot in diameter, a stream which reached speeds of between 20 and 2.5 times the speed of sound. Thus the hollow-charge acted as a "gun", and the soft metal liner as a "bullet". The colossal speed attained by the thin jet of soft metal gave it the energy necessary to "drill" a hole clean through steel armor with a thickness of up to four times the maximum diameter of the warhead itself; in the case of the six foot diameter warhead fitted to the Mistel lower component, this gave a theoretical maximum penetration of the order of 24 feet. Such a warhead would I penetrate the heaviest armor carried by a ship with ease. Once through the outer protective shell of the target, and now confined inside it, the jet of high energy metal would vaporize anything in its path.
The stand-off probe was necessary to set off the main explosive charge at the optimum distance from the target, so that the soft metal liner had time to form itself into a thin jet before it struck. Within limits, the further the charge from the target when it was detonated, the thinner and deeper the hole "drilled"; the closer the charge to the target, the wider and shallower the penetration. Both long and short stand- off probes were used with the Mistel. The entire hollow-charge action took place within one ten-thousandth part of a second, during which time a relatively slow-moving Ju 88 explosive aircraft, impacting at 400 m.p.h., moved forwards about a half an inch. This, then, was the potential of the Mistel device.
The Ju 88 used for the Mistel program had their crew compartments removed at the after bulkhead, then these were re-fitted in place by means of quick-release fasteners. For ferry and training flights both the upper and the lower components were manned. At the last possible moment before an attack, the crew compartment was removed for the last time and the deadly hollow-charge warhead fitted in its place. This task required six mechanics, two armourers, and four ton capacity crane, and took one day. The process had an air of finality about it, for once the warhead-fitted Mistel had taken off the fighter pilot could not land the combination; whether it reached the target or not, the Ju 88 lower component was doomed. A series of aiming tests against cliffs on the Danish island of Moen proved the feasibility of the weapon.
TRAINING
Mistel pilots began training in April 1944, using the first two prototypes. Each man completed ten flights without releasing the lower component, then three flights each with a release. The pilots found that the poor view forwards from the fighter cockpit made the initial part of the take-off run difficult, and this ruled out the possibility of night take-offs. However, once it was airborne they found the Mistel easy to fly, if a little sluggish on the controls.
Mistel combinations were put together using a number of different types. The original employed the Bf 109F and the Ju 88A, later ones employed various sub-types of the Fw 190 and the Ju 88. Versions projected but never assembled comprised an Me- 262 jet fighter on top of a Ju 287jetwmber, and an He 162 jet fighter mounted on an Arado E 377 A flying bomb.
THE "IRON HAMMER" PLAN
"Operation Iron Hammer", the planned blow to knock-out the Russian armament industry, had first been mooted at the end of 1943. The key targets within Moscow and Gorky were judged to be the steam and hydro-electric generating stations. It was known that the Russians lacked the plant to produce such turbines - most of the equipment scheduled for attack under the "Iron Hammer" plan had been supplied by the Germans before the war. As a result the Luftwaffe planners felt that the Russians would not be able to effect repairs for a very long time. But before the plan could be put into action the Russians overran the advanced bases which were to have been used. Now the targets lay beyond the range of the He 111.
For the operation specially modified Mistel combinations were prepared, able to cover the 760 mile distance from the base airfields to the targets. The Fw 190 upper components were each to carry two drop tanks for fuel, and additional tanks for both fuel and oil. Following tests held at Udetfeld with the warhead, it was calculated that two hits with hollow- charge fitted Ju 88's would be sufficient against the smaller power stations, while six hits would be necessary against the larger ones.