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pierreyerokine.perso.sfr.fr/torpille.htm ( übersetzte Version ) Dann hab ich hier noch einen Artikel von Matthew Spade, der sich mit dem Bau eines Vertical Launch System befasst. Leider ist der Artikel beim SC nicht mehr online, ich hatte aber mal ein Backup gemacht. Mit freundlicher Genehmigung von Tim Smalley vom Subcommittee hier der Artikel: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx LAUNCH THIS...! Matthew Spade From SubCommittee Report Issue 21 Since I went to the first SubCommittee Regatta in 1992, I've heard many stories about missile launch systems in SSBNs. Some good, some bad, but all used Estes rockets. Although I have never seen a launch, one story I heard involved a neighbor´s open window and a carpet set on fire by a stray missile. I thought to myself, "There must be a safer way to do this." This winter, my friend and SubCommittee member, Dennis Smith, offered me his 1/96 Copeland OHIO hull. He also had the 32 Parallel kit and wasn't going to build both. I accepted mainly because I wanted to experiment with alternative missile launch systems. Several theories were tested including water and air mix, and sodium bicarbonate, but what you'll find here is my best solution. Now, let's reapply some technology that works. The gas-operated torpedoes that Mike Dory, Gene Berger, and some others are using work very well, but are too slow for the violent reaction necessary for the vertical launch of a missile. If we take the same main body of the torpedo but open the exhaust port to 1/6th inch we get a dramatic increase in velocity over a short distance. Initial test launches from 10 inches of water resulted in a launch of approximately 60 to 70 feet. Wow! [align=center:a152dccc3e] 
The missile is constructed of l/2 in. CPVC pipe cut 5 in. long with 1/8 in. thick plastic discs press fit in each end and glued in with CA glue. Now, drill one end to accept a standard brass tire valve. I used a valve designed for air tanks with 1/8 in. pipe threads at the bottom. These are available at most auto parts stores. I cut the threads off right at the base of the valve, leaving a barrel length of 3/4 in; this is necessary for nose weight in the missile. The tire valve gets pressed in up to the threads at the top of the valve for the cap, and glued in place with CA glue. [align=center:a152dccc3e] 
[align=center:a152dccc3e]...3...2...1...LAUNCH![/align:a152dccc3e] It is important that everything fits tightly to ensure the air tightness of the missile. Next, drill a 1/6th in. hole in the bottom of the missile and slightly counter bore the hole. Be careful not to open the diameter of the hole. At the base of the missile, there are three delta-shaped fins 1-1/2 in. long and 5/32 at the base, spaced evenly apart. The bottom 3/16 in. of the fins are bent to a 20 degree angle, all in the same direction, to cause the missile spin like a bullet. The nose cone is made of balsa wood 5/8 in. long and shaped to the diameter of the missile. Balsa wood was used for loatation. [align=center:a152dccc3e] 
Because of the height restrictions of the hull, the pin used in the bottom of the missile cannot be pulled out of the missile. I used a small 7/8 in. long pin that goes through the bottom of the hull and is held in place with a body spring clip used on R/C cars. The pin has a brass plate 1/4 in.. wide and 3/8 in.. long soldered to its base to accept the spring clip and a 1/6 in. brass cross rod to keep the pin from falling through the hull. The pin is inserted in the missile, and then the missile is charged with propel, placed in the missile launch tube, and pinned in place. Now, instead of pulling the pin, I used a lever ´L´ arm to push or pry the missile from its pin. The arms are made of 1/4 in. aluminum plate stock machined to shape. There are two launch tubes made from l in.. dia. rigid clear fish tank filter tubing; each has an independently operated lever arm connected to two servos in a separate water tight box, which also houses its own two-channel receiver. A separate radio system was employed to free the sub pilot to control the boat, while the missile control officer concentrates on the missiles. This setup appears to be a hassle, but in order to fire the missiles, the sub must be completely stopped and hovering in position or the missile will be thrown off course. Having the controls separate makes this easier to do. Besides, it gives me someone to bark commands at! [align=center:a152dccc3e] 
[align=center:a152dccc3e]Missile launch installation[/align:a152dccc3e] SubComEast had its winter meet on March 19th at Fort Dix, NJ, in their indoor swimming pool. This was the first real test of the system since it was installed in the sub. After Skip Asay helped me get the boat ballasted properly, I loaded the first set of missiles, which fired prematurely while Skip and I were lowering the sub into the water. The pins weren¹t pushed in far enough, but that was easy enough to fix. Now, with the missiles reloaded and back in the pool, I submerged the ship and brought it to a hover at periscope depth. With my wife at fire control, the first missile was let fly, It blasted out of the sub, broke the surface and flew with great velocity straight into the 35-foot high ceiling and bounced back into the pool. I considered this a successful test! The second test was done at my local lake, and the results were equally impressive (but with no roof to bounce off of). However, I did discover that the cold water of the lake, 40 degrees, did significantly reduce the velocity of the missile. Propel´s pressure is greatly affected by the surrounding temperature-- so, as water temperature increases, so will the performance of the missiles. This missile system has some obvious advantages over Estes rockets. It´s safer because there´s no fire hazard, and the trajectory of the missile is very predictable. There´s also no need to water proof the missile compartment. In fact, the missile will only launch correctly from a submerged boat. Reloading the missile system is easy. They are reusable. Simply recharge the missiles and load them back in the sub. You can be ready to launch again in a matter of minutes. I hope this will help anyone who has been considering a missile launch system for their sub. xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx So Jungs, wer der englischen Sprache nicht so mächtig ist: unten rechts hier im Forum ist die Dropdownbox zum übersetzen  Gruß Heiko |
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