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KKM57P

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  • in reply to: Hot Dog Typhoon thread III #2443480
    KKM57P
    Participant

    Try google to as it is choc full of links about Lunberg reflectors. F-117’s also used them.

    It’s called right Luneburg reflector and the orginal name is Lueneburg lens!;)

    in reply to: Nazi Stealth Bomber #2434121
    KKM57P
    Participant

    and Huff-Duff.

    in reply to: Nazi Stealth Bomber #2434178
    KKM57P
    Participant

    The documentation at youtube

    The Playlist
    http://www.youtube.com/view_play_list?p=463E6E278C9B8AB1

    in reply to: question about Boeing XF-36 stealthness #2434933
    KKM57P
    Participant

    Radar blocker –> baffles.
    Same working principle like a micro wave oven window.

    in reply to: Nazi Stealth Bomber #2435736
    KKM57P
    Participant

    Not the H-229 in orginal but as modell plane.

    in reply to: Nazi Stealth Bomber #2435863
    KKM57P
    Participant

    Not Radar wins the war, Blechtley Park and their Enigma crack.;)
    Through the high German u-boat loss rate was no nickel available for the jet engines etc.
    Why used the USN not their superduper RADAR on Pearl Habor?
    Before the Randel (UK) and Bott (UK) magnetron based on the Hollmann Patent (Germany) the US had only a 10W klystron in the cm range.:rolleyes:
    Britain had no money to develop the magnetron on a massive scale, Churchill agreed that Sir Henry Tizard should offer the magnetron to the Americans in exchange for their financial and industrial help. 😉

    in reply to: Nazi Stealth Bomber #2436079
    KKM57P
    Participant

    Surprise that the Germans had the magnetrons(use to generate microwave signals for radar) in the 1930’s. This could also explain how the Japanese got hold of the magnetron technology in the 1940’s, most likely obtained it from the Germans. Apparently the American/British did not have a monopoly on the magnetron technology.

    Another surprise,
    Kinjirō Okabe build 1929 a 5.25GHz magnetron.

    in reply to: Nazi Stealth Bomber #2436833
    KKM57P
    Participant

    Homing is not jamming!:diablo:
    You should not look to much trashy Hollywood movies.

    in reply to: Nazi Stealth Bomber #2436916
    KKM57P
    Participant

    The answer is simple

    August 1940
    L40.3.6 Target Flight against the CH Stations
    To effect a flight against the CH stations directly, the German Aeronautic Research Institute (DVL) equips an He110 aircraft with target homing device developed for this particular application. Except for a test flight on the English coast, the aircraft is not used in this capacity. It is proven that the installations protected by balloon barrages cannot be completely demolished by either long-distance guns or bombing.

    With jamming one CH station the wiped the complete CH out of service.

    in reply to: Nazi Stealth Bomber #2436919
    KKM57P
    Participant

    Surprise that the Germans had the magnetrons(use to generate microwave signals for radar) in the 1930’s. This could also explain how the Japanese got hold of the magnetron technology in the 1940’s, most likely obtained it from the Germans. Apparently the American/British did not have a monopoly on the magnetron technology.

    Free deliverd to the USA and allys, Hollmanns (GEMA) multi cavity magnetron US patent 2,123,728 for centimeter waves. 😉

    in reply to: Nazi Stealth Bomber #2436939
    KKM57P
    Participant

    it’s maybe of current interest.

    http://www.radarworld.org/radarwar.pdf

    in reply to: Nazi Stealth Bomber #2437082
    KKM57P
    Participant

    Very short.
    I suggest RADAR-war Page 8-9

    L40.3.1 Chain Home (CH). English Coast Radar l=12m
    The Germans observe 12m pulse signals at the western front without being able to recognize
    their origin and purpose.
    June 1940
    In the middle of June the German Aeronautic Research Institute (DVL) is given the task of
    explaining the nature of these signals. A special group under the direction of Professor von Handel
    finds out that the signals originate from radar installations and from the coast of the English
    Channel. They pinpoint the location of the 12m CH installations that up to then had been thought
    to be coastal radio stations. The scientists observe that the transmissions of the individual stations
    are pulse modulated to avoid mutual interference. In addition more radar installations in the 6m
    and 3m range are discovered and located. After two short weeks a map of the complete system of
    CH installations in the south of England is delivered to the Air Force Ministry of the Reich (RLM)
    that had so far been completely unaware of their existence. Air Force captains are informed that
    clouds provide no protection from being discovered prematurely, only flying low does.

    L40.3.2 German Aviation Research Institute’s Jamming Station
    l=12m
    The fact that the CH stations are connected with each other through pulse modulation raises the
    possibility that interfering with one station would disturb the whole system. Therefore the German
    Aeronautic Research Institute (DVL) immediately builds a jamming station with sound barrage jamming.
    5 July 1940 Its deployment at the beginning of July 1940 at the coast of the English Channel is successful and puts the CH out of operation for some time. 😉

    in reply to: Nazi Stealth Bomber #2437611
    KKM57P
    Participant

    Charcoal mixed into the Ho-229’s plywood skin forms a lossy dielectric which is the basis for modern RAMs. Remember, the Germans also treated their U-boat snorkels with a form of RAM to prevent Allied radar from detecting them. RAM technology was not unknown to them.

    You mean “Schornsteinfeger”.

    in reply to: Nazi Stealth Bomber #2437646
    KKM57P
    Participant

    I seriously doubt the Germans were aware of that. I don’t believe they designed with that knowledge, more likely it was a fluke. They certainly didn’t have the capability to test a la NG as you talked about in your second post. I’m sticking by my assertion that the primary goal of the design was for performance, and that stealth was a secondary consideration.

    The Germans had no idea of the wavelength of the Home Chain radar…

    You should not so much trust Wikipedia

    The know about the chain home or why use the chain home as transmiter for the Der Kleine Heidelberg Parasit?
    page 26
    http://e7.eiscat.se/groups/Documentation/CourseMaterials/School2007/EISCAT%20School%2030%20July%202007%20History%20of%20Radar.pdf

    More ally bomber downed with the help of chain home as Germans.;)

    in reply to: Nazi Stealth Bomber #2437648
    KKM57P
    Participant

    Anachronistical nonsense.

    Putting the ‘stealth’-label on the Ho-229 just because it’s a flying wing is like calling the Eiffel Tower a giant cellphone antenna because it’s a mast. The low radar signature the Horten design (appearantly) has is by coincidence, not by design. No matter how hysterical the spin in recent articles and ‘documentaries’.

    Besides, the Ho-229 is (still?) at the NASM maintenance facility (Garber?) where it indeed wasn’t on display, but all too frequently publicly accessible during tours.

    Besides, if that ‘Experimental Nazi Stealth Bomber’ was such a threat, I’m sure the ‘Operational Peronist Stealth Superfortress’ was even more of a peril during the 1950s than the Red Menace.

    It’s the IA38 of course. Except that it was ment to fly fruit around. Which it never did because it was underpowered.

    (Sidetracking: can anyone identify the plane to the right on the frontal view of the Naranjero? There’s a Pulqui to the right, but on the other side there seems to be some sort of high-nosed delta design, a bit like the Ha300. Can’t really tell what it is).

    But your flying wing has corner reflectors (wing sideruder ) but the HO-229 has no sideruder therefore no corner reflector and 90°. Then why should the Hortens use Schornsteinfeger-RAM when not for Stealth reason?

    Mipolam is more similar to PVC.

Viewing 15 posts - 151 through 165 (of 577 total)