ORIGINAL: Warfare1
Researchers believe the Ho 229's stealth capabilities would have allowed it to appear invisible to British Royal Air Force radars if it were to fly a few dozen feet from ground level.
Lol, that's an instant classic, for sure.
If I could fly a random German plane, be it the most ugly flying brick and the slowest plane on earth, a few feet above ground level, my plane would have the same level of "invisibility" as the Ho 229:
In the 1940s, extremely low flying planes could not be detected, as even the British mobile radar stations (Chain Home Low) did not work below 500 feet.
But even today the British IDS Tornados and the German ECR-Tornados, with their capability to perform "zero" altitude flying, featuring an auto-pilot system that uses a terrain following radar (TFR) to avoid detection, use this method:
They fly below the enemy's minimum radar level, 60 meters above the ground. The missions flown in Kosovo 1999 perfectly demonstrate how effective such a plane is, as Serbia's fixed and mobile radar and SAM stations had been destroyed that way.
A few RAF Tornados had been shot down (by AA guns) during Desert Storm, so the RAF switched to high-level bombing missions, mostly firing rockets from areas well outside Iraqi missile ranges, due to one reason (afaik): The RAF (unlike the German airforce) does not employ ECR-tornados, so their IDS-versions do not have the "Emitter Location System", a system that can precisely locate radar systems of tracked AA guns, SAM sites and long-range radar stations.
That said, it would have been quite risky to fly the fragile Ho 229 at similar low altitudes (without a modern auto-pilot), exposing them to possible downwinds or AA fire (ships, land installations) especially since there was no TFR, back then. The Ho 229 was designed to be a fighter, not a bomber. Also, the so-called anti-radar paste, claimed (by Reimar Horten - in 1980) to be applied to the 229's hull, the powdered coal mixed with glue, was supposed to act as filling or smoothing cement and used to save weight, Karl Nickel, a Horten employee responsible for conducting aerodynamic calculations and other tasks, confirmed the weight saving aspect, and ruled out any anti-radar function. Interestingly, all Ho 229s that can be seen on a few pictures were unpainted. The only Ho 229 that was painted was the one that was presented as booty on shows in the US ; it had been painted in the US.
The 229's frame consisted of a main steel bar and welded steel tubes, with the rest consisting of wood covered with a thin metal plating. Other parts like the fuel tank, cockpit tube, instruments, guns and engines, etc consisted of metal, too.
I can imagine that the design of the frame alone could create a somewhat lower radar profile.
The National Geographic Channel conducted some tests early this year, where they created a mockup (100% wood) which had an around 20 percent lower radar profile. The next step was to apply a metallic silver paint all over the model's front, where then some tin foil was supposed to simulate metal parts like tank and engines. The only real metal part was a primitive Ersatz for the dashboard, a metal plate with painted instruments.
http://www.youtube.com/watch?v=Z07Kt4pj ... B1&index=0
The 229 hull's surface consisted of a metal plating, and although the guys in the Northrop workshop claim that the silver paint would have "electrical" characteristics similar to the original metal platings, I don't believe that electrical properties necessarily correspond to the level of reflection a metal surface would deliver. I rather think that the makers of the doc wanted the German fighter to be the first stealth fighter in history, and the guys at Northrop were so kind to word their statements in a way that the maker could interpret it the way they did.
A 20% lower profile does not make a plane stealth. The statement in part 5, that the 20% lower profile PLUS the speed would reduce the warning time from 19 to 8 minutes sounds reasonable, but the film makers focus should have been on speed and the question whether the controls allowed for continuous ultra low-level flight or not. If they would have done that, the whole doc would have been either obsolete, or they would have had to change the title, I believe.
But "Germany's fast flying wing" doesn't sound spectacular enough, does it? [:D]
The original middle section of the Ho 229 in the TV doc actually is the V3 prototype based on the Horten Plans but made by the Gotha factories, so I would call it Go 229. The Go 229 concept was a competing further development of the original Ho 229, which featured design changes, ie. Gotha put in Jumo 004B jet engines instead of the planned BMW 003 engines, they put in a wider pilot seat, and the interspace between the 2 engines had been stretched. You can see those versions on the rendered screenshots posted by Warfare1. It almost looks like the engines had been put on top, where the original Horten design had the engines fully integrated into the hull.
In later sketches - probably starting with V6 or V8, Gotha even incorporated a conventional side rudder and pitch elevator, in an attempt to solve problems with the plane's aerodynamics. The documentary twists some historical details, and exaggerates regarding the alledged stealth capabilities. Also, I doubt you could shred a chain home low-station with a few MGs, as shown in the doc, the Germans sent Stukas and Me 109s to bomb them - in 1940. In turn, the Ho 229 did not have a bomb bay, nor mountings to hold bombs.
While Gotha started to work on the prototypes V3-V5, the Horten brothers had already turned to design a way larger version of the 229, basically a long-range bomber with a bomb bay, after the test squadron IX had been disbanded (IIRC in February or March).
With all these "secret weapons", you have to try to get to the bottom regarding purpose of the weapons/vehicles, historical evidence and rep of the sources.
Me 262:
An earlier Me 262's serial production was hampered by the fact that Hitler wanted it to serve in a "Blitzbomber" role, a role that demanded a setup that capped the 262's max speed by 200 km/hour. The initial bomber role of the 262 negated the speed advantages of the fighter concept.
Still, the low numbers of fighter versions delivered to a few squadrons in mid/late 1944 inflicted quite some losses among the Allied bombers, that a general of the US bomber command stressed that the Allies would not be able to sustain such high losses for more than 1 month, in case the Germans would be able to keep up the initial number of sorties. So, this part of Warfare 1's statements/assumptions is halfway correct, if he says it would have changed something. Sufficient amounts of aviation fuel, and a strict policy focusing on the 262's fighter role, could have at least prolonged the war, as it would have taken the pressure off the German armament factories and oil refineries. But an airforce can't win wars.
Still, in 1943, the loss of 8-10% of the total number of bombers participating in one of the mass bombing raids on German cities (eg. "1000-bombers-attack on Cologne", which in fact involved something between 800 - 890 bombers) was regarded as mission failure. With the German nightfighters coming up in 1943, even the Brits reduced the number of sorties, until they managed to fool the warning radars and the nightfighter's radars with chaffs.
The performance of the Me 262 fighters was promising, but afaik the few Me 262 in service did not inflict losses anywhere near 10 percent, original reports of Me 262 sorties like 12 kills (with three 262s lost), display that the ratio was good, but anything than optimal.
Luckily for the Allies, the lack of aviation fuel forced the Germans to keep the number of sorties on a really low level. Around 1100 Me 262's had been built (the production output in early 45 was higher than in 1944), but only a tiny share of them actually saw combat.
@ Warfare 1:
The Arado Ar 234 was ordered by the Luftwaffe in order to serve as high-speed recon plane. The first 234's sent to England, in July 1944, were the unarmed prototypes V5 and V7. Their mission was to take pictures of the entire British (southern) coast line and hinterland. The technique (to make a series of pictures the recon eval officer would then just put together) used there is still being used in the drones and in recon Tornados used by the German Bundeswehr, actually.
The German Luftwaffe used to put up a list of minimum requirements, - and, on quite some occasions after Hitler's or Göring's intervention, even expanded such lists, often demanding dual roles or even multi-purpose planes, hence the Arado 234 prototype V10 was already designed as a bomber, maybe in anticipatory obedience.
Whatsoever, it was then able to serve as level bomber, since it had received a BZA bombsight and 2 mountings to hold one bomb under each engine. Another Version was designed as night fighter (with radar), and the bomber version's capabilities were expanded so that it could serve as dive bomber, too.
The max. bomb load was 1500 kg, a pretty low amount compared to the enhanced He 111 bombers, which could carry a max payload of up to 3250 kg. The plane was a recon plane, and - if at all - halfway useful as tactical bomber. The failed attack on the Remagen bridge shows that a highspeed approach on a target demands advanced targeting devices (ie. head-up-display), which weren't available back then. Dive bombing-runs had to be carried out at lower speeds, making the plane vulnerable to enemy AA fire. German Fighter bombers conducting ground-attacks in early 1945 with rockets were way more successful, so the commitment of Arado bombers was either reduced or even completely halted. Most of the Arados were re-deployed to Norway in early 1945, conducting recon missions over Scotland and North East England.
He 177:
Btw, one production model of the only German conventional long-range heavy bomber He 177 "Greif", which could have been used to bomb Stalin's factories in the Ural - if they would have been produced in large numbers, was modified to offer sufficient space for holding a future atomic bomb.
My 2 cents