Questions tagged [delta-iv-heavy]
Delta 4 Heavy uses three of the Delta 4 Common Booster Cores side by side to launch heavy payloads.
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Are the Delta IV Heavy’s attachments for SRBs removable?
The Delta IV (which uses solid rockets in a couple configurations) shares a "Common Booster Core" with the Delta IV Heavy, which does not. Since Delta IV must have attachments for the solid ...
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Can a Delta IV Medium fairing be put on a Delta IV Heavy for small payloads?
The Delta IV Heavy has a bigger fairing because it's able to lift heavier/bigger payloads, as we saw in this question. But if a payload is small and still needs a Delta IV Heavy because of its high ...
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Why is the Delta IV Heavy taller than the Delta IV Medium?
Looking at below picture, the Delta IV Heavy is clearly much taller than the Medium. Is there any specific reason why?
https://www.space.com/15078-rocket-launch-delta-4-milestone.html
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Why did NASA never launch crewed Orion missions on a Delta IV Heavy to the ISS?
Following the successful EFT-1 mission, why didn't NASA start launching crews to the ISS on the Orion spacecraft? This question deals about why crews weren't sent to the Moon, but I wonder why wasn't ...
user46063
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Why do RS-68s suffer ignition failures?
NROL-44 failed to be in space for yet one more night last night, this time because of an automated hotfire abort triggered when one of the outboard (iirc) engines on the Delta IV Heavy failed to ...
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Why isn't the Delta IV Heavy ever used for crewed spaceflight?
In 2014 the Orion spacecraft was launched on top of the Delta IV Heavy for the first time. Why do they build another rocket, the SLS, instead of launching the Orion on the Delta also with humans on ...
user35272
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How is imbalance handled in the Delta IV heavy?
All the engines of the Delta IV are not ignited at the same time: One of the lateral engine is started few seconds before the other. I imagine there is a good reason for not starting all engines at ...
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Feasibilities and challenges of these Orion + commercial lunar lander scenarios? [closed]
Suppose that US politicians want to fund a moon mission without SLS, using only hardware that is working now in 2019, using Orion together with some future moon lander supplied by the private sector.
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Why would rocket bodies use specifically ablative coatings to reduce boil-off of cryogenic propellants? Is ablation important for this?
The end of YouTube video Delta IV Heavy Pad Tour, (with CEO Tory Bruno) - Smarter Every Day 199 points to Destin's second "Smarter" channel's video UP CLOSE Delta IV Heavy Launch Pad Tour (...
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What is the point of launching EM-1 on DIVH/F9H?
EM-1 was originally a full-up test of the SLS block 1B: Orion, ICPS (a modified 5-meter Delta cryogenic second stage), and the first stage/SRBs.
NASA administrator Bridenstine’s statement on 3/13/...
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Surmountability of the technical risks to launching EM-1 on commercial rockets?
NASA administrator Bridenstine announced that commercial rockets (e.g., Delta Heavy and Falcon Heavy) would be considered as ways to launch EM-1 by July, 2020.
Such a move would reportedly require a ...
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Can Delta Heavy launch a fully fueled upper stage with no payload attached?
There is right now talk of a potential dual launch mission to fulfill EM-1, where a Delta Heavy would launch a fully fueled upper stage to LEO, to there bet met with the Orion spacecraft, likely ...
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What causes these plume features on Delta IV Heavy?
Just catching up on the Jan 19th launch of NROL-71 on board the Delta IV Heavy and I noticed these very prominent features in the exhaust plumes, beginning around the time the centre core is throttled ...
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Why does the Delta 4 Heavy look burned? [duplicate]
When I was looking at pictures of the Delta 4 Heavy rocket, I noticed that closer to the engines, the rocket looks black instead of the orange color it has right after launch. It looks burned to me.
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Velocity of the Parker Probe when it will be given final boost by the rocket?
What is the current speed of the parker probe which is just launched today(After
Final boost(detached by the rocket)).
I was just guessing as it will attain max speed of ...
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