Wilhelm Schmidding KG was a manufacturer of rocket engines, essentially boosters, although some were the main missile engines. The first of them, the 513, ran on liquid fuel, the rest of them on solid fuel, Diglycol (Diglycolnitrat-Pulversätzen) also called Schmidding-Pulverraketen.

-The 513, (109-513) ran on M-Stoff and A-Stoff, that is, Methanol (Methyl Alcohol) and Liquid Oxygen.

-They were mounted on the HS-293H missile and some early HS-298s.

-The 533, which aided the Bachem Natter Ba-349 taking off, used solid fuel, Diglycol.

"Two Schmidding engines of the Bachem-Natter"

-The 543, which had factory assignation SG-32/109-543, ran on Diglycol and was mounted on the HS-298s that followed. It gave 150 Kgf of thrust.

-The engine cylinder was made of a mixture of Silicates, Kalium, Asbestos and Graphite.

“Bachem Natter in Munich”

-On the Natter exhibited in the Museum we see the two double 533 engines. As they were very heavy, 85 Kg each, they were launched once exhausted, detaching by some explosive screws that fixed them to the device.

-The fuel weighed another 40 kg. It was the same diglycol-dinitrate.

“Schmetterling in Munich”

-The “Schmetterling-Flakrakete”, (HS-117) as its name indicates was an anti-aircraft rocket, a surface-to-air missile. The engines were Schmidding 109-553.

-The 109-563, gave 500 Kp of thrust and used solid diglycol too.

-Curiously, the Schmidding 109-573 was used for underwater ignition.

-The Schmidding 109-593 gave 750 Kp of thrust. The 109-603 gave 150 Kp of thrust and ran on Diglycol. It was mounted on the Kramer X-4 rocket.

From Appendix 7: At the “Planes of the Fame” Museum in the USA there is a Schmidding 109-513 engine. It was used on the gliding flying bomb with momentary impulse on its Henschel path.

“Schmidding 109-513 rocket engine”

-It used gaseous oxygen and methanol.

From Appendix 10: New photographs of the booster rocket motors used by the Bachem “Natter” vertical takeoff aircraft.

“Schmidding 533 model”

-See the main text for the photograph of a Bachem in a Museum in a vertical position. It took off guided by two rails at the ends of the wings.

“Bachem found by the allies” (PiP)

-The solid fuel for these engines was Dyglycol. Above the wooden platform we see a Schmidding. They had the exhaust nozzle directed outwards.