The Stratolaunch Model 351 aircraft.
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aka the Roc is the largest aircraft in the world.
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Its wingspan is 117 meters, and is 226 tons (with a full tank, 340 tons.
[bc5a]. ).
Its take-off weight is 590 tons.
The aircraft can lift a rocket up to 250 tons.
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its height is over 15 meters.
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The aircraft is assembled from two Boeing 747s, but with lighter carbon fiber elements.
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One fuselage houses the crew, and the other has  navigation, flight and other avionics.
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The Roc is designed to carry Pegasus XL launch vehicles to launch satellites into orbit.
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from an altitude of about 10,500 m. [73c1].
It is equipped with 6 25-ton thrust Pratt & Whitney PW4056 bypass turbojet engines.
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and a 28-wheel chassis.
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It is designed to launch 6.12 tons of payload into low Earth orbit.
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It will be a platform for launching small launch vehicles to a height of 9,100 meters.
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One test taxi run took place on the runway in the Mojave Desert.
California
, where the Roc accelerated to approximately 128 km/h.
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In February, 2018, the Roc made several taxi runs reaching 75km/h.
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A sea test of the Roc, tested the suspension, braking system and other technologies, at 45km/hr.
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The take-off distance with a full load is estimated to be 3800 m.
The maximum range of the aircraft with a full load will not exceed 3700 km.
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Paul Allen founded the Stratolaunch project to create a space launch system using conventional runways, a jumbo jet and single-stage launch vehicles.
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The famous aircraft designer Burt Rutan acted as the chief designer of the aircraft.
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Stratolaunch Systems announced at the 34th Space Symposium scientific conference that the Roc will fly that summer.
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In April 2019.
[9eea]. , the Roc completed its maiden flight.
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at 5200 meters.
Its second flight was at 4300 meters for 3 hours 14 minutes, 44 minutes longer than the first.
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The US Department of Defense will use the Stratolaunch to test hypersonic technologies.
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Warning: these questons and answers are not all representative of the way questions will be asked and answered in the pilot, because some questions are compound and some answers do not include citations.

Q: What is the largest airplane in the world at this time?
A: The Stratolaunch Model 351 aircraft [73c1409d-a564-4d37-b96a-d7feef69565b]

Q: What is its nickname?
A: the Roc [1dd4fad9-b54c-4847-b56c-cc84b5960f73]

Q: Give a list of its measurements and stats:
A: Its wingspan is 117 meters, and is 226 tons. Its take-off weight is 590 tons. The aircraft can lift a rocket up to 250 tons [1dd4fad9-b54c-4847-b56c-cc84b5960f73, 1c697eb0-6f1d-43bd-8678-08e1db9cbd55, 73c1409d-a564-4d37-b96a-d7feef69565b, 8ba29e36-42be-49a2-bf52-0dd5627fe883, 6444f5ad-360d-4313-9d8c-03df7f6fe9e3]A: Its weight with a full tank is 340 tons [bc5a2f27-bec9-43bc-8b6f-fae3822664a4]A: its height is over 15 meters. [e462ef5e-ec4a-449d-919a-c916a979e4b3, 6444f5ad-360d-4313-9d8c-03df7f6fe9e3]

Q: What payload can it lift?
A: The aircraft can lift a rocket up to 250 tons [1dd4fad9-b54c-4847-b56c-cc84b5960f73, 1c697eb0-6f1d-43bd-8678-08e1db9cbd55, 73c1409d-a564-4d37-b96a-d7feef69565b, 8ba29e36-42be-49a2-bf52-0dd5627fe883, 6444f5ad-360d-4313-9d8c-03df7f6fe9e3]A: 6.12 tons of payload into low Earth orbit. [767a80e1-8086-4fd8-97ee-78ec63d69034]

Q: How is it constructed?
A: The aircraft is assembled from two Boeing 747s, but with lighter carbon fiber elements. [1dd4fad9-b54c-4847-b56c-cc84b5960f73]

Q: What is inside?
A: One fuselage houses the crew, and the other has  navigation, flight and other avionics. [e462ef5e-ec4a-449d-919a-c916a979e4b3]

Q: What is it designed to carry?
A: Pegasus XL launch vehicles to launch satellites into orbit [1c697eb0-6f1d-43bd-8678-08e1db9cbd55, 6444f5ad-360d-4313-9d8c-03df7f6fe9e3]

Q: From what altitude it is designed to launch?
A: 10,500 m. [73c1409d-a564-4d37-b96a-d7feef69565b]

Q: What kind of engines does it have?
A: 6 25-ton thrust Pratt & Whitney PW4056 bypass turbojet engines [73c1409d-a564-4d37-b96a-d7feef69565b, 767a80e1-8086-4fd8-97ee-78ec63d69034]

Q: How many wheels does it have on its chassis?
A: 28 [1c697eb0-6f1d-43bd-8678-08e1db9cbd55, 73c1409d-a564-4d37-b96a-d7feef69565b, 6444f5ad-360d-4313-9d8c-03df7f6fe9e3]

Q: Describe the various tests the Roc has undergone:
A: One test taxi run where the Roc accelerated to approximately 128 km/h. [1c697eb0-6f1d-43bd-8678-08e1db9cbd55]A: In February, 2018, the Roc made several taxi runs reaching 75km/h. [1c697eb0-6f1d-43bd-8678-08e1db9cbd55, e462ef5e-ec4a-449d-919a-c916a979e4b3, 8ba29e36-42be-49a2-bf52-0dd5627fe883, 767a80e1-8086-4fd8-97ee-78ec63d69034]A: A sea test of the Roc tested the suspension, braking system and other technologies, at 45km/hr. [e462ef5e-ec4a-449d-919a-c916a979e4b3]

Q: Where were these tests run?
A: Mojave Desert (California) [1c697eb0-6f1d-43bd-8678-08e1db9cbd55, e462ef5e-ec4a-449d-919a-c916a979e4b3, 8ba29e36-42be-49a2-bf52-0dd5627fe883, 767a80e1-8086-4fd8-97ee-78ec63d69034]

Q: Describe the take-off ranges of the Roc:
A: take-off distance with a full load is estimated to be 3800 m. [73c1409d-a564-4d37-b96a-d7feef69565b]A: The maximum range with a full load will not exceed 3700 km. [73c1409d-a564-4d37-b96a-d7feef69565b]

Q: Who initiated the Stratolaunch project?
A: Paul Allen [e462ef5e-ec4a-449d-919a-c916a979e4b3]

Q: Who is the famous aircraft designer of the project?
A: Burt Rutan [73c1409d-a564-4d37-b96a-d7feef69565b]

Q: What was announced at the 34th Space Symposium scientific conference?
A: That the Stratolaunch vehicle would launch that summer. [767a80e1-8086-4fd8-97ee-78ec63d69034]

Q: Describe its maiden flight:
A: In April 2019 [9eea978b-a1f4-4225-924c-a6387c3cc562]A: the Roc completed its maiden flight at 5200 meters. [be9007af-1518-4969-8f28-688116a17c33, 4a5a476d-6c58-4c2f-8042-b12291ded3d2]

Q: Describe its second flight:
A: Its second flight was at 4300 meters for 3 hours 14 minutes, 44 minutes longer than the first. [4a5a476d-6c58-4c2f-8042-b12291ded3d2]

Q: What will the DoD use the Stratolaunch for?
A: to test hypersonic technologies [1094e1dc-ac51-4370-a5cd-8a308c5b0645, 4a5a476d-6c58-4c2f-8042-b12291ded3d2]