Sukhoi Su-27/30/33/35/37 Flanker series & Su-34 Fullback - History, Design, Performance & Dissection (Part 1)

You’ve already been provided several, Soyuz for example are used as air brakes almost exclusively.

The Falcon 9 booster uses all available surfaces for slowing down descent. This minimizes terminal velocity and reduces required propellant for landing. No, they don’t use all the propellant. This is intentional because as said above… You don’t want to run out of fuel when trying to land a multi-story tall building essentially.

Even the landing gear assist in reducing terminal velocity by 1/2.

https://web.archive.org/web/20150131013833/http://shitelonsays.com/transcript/elon-musk-at-mits-aeroastro-centennial-part-1-of-6-2014-10-24

The basic design of the grid fins as a control surface at high mach numbers would dictate thin grids to avoid wave drag. The falcon 9 seems optimized to increase drag and still flow at the same time unlike the R-77’s which is optimized simply for low drag.

Only you get to spout absurdities and then it’s hush so no one can correct you?

Even if you don’t believe me and want a source explicitly stating that it is used to assist slowing the falcon 9 down, you must admit it is absurd they’d make thick and draggy grid fins if heat was an issue… instead they manufactured even thicker titanium grid fins (the old ones were aluminum) instead of improving the heating issue by making the aluminum models thinner.

The tip of the R-77’s grids fins are ultra fine and pointy. It doesn’t matter how you scale a grid fin, if it isn’t being used to slow something down you’ll want the tips to be ultra sharp. This stalls the wave drag issue and reduces heating, improves airflow and control. The falcon has taken the opposite approach and uses peaks & valleys to ensure there is still flow while simultaneously allowing the high drag to minimize terminal velocity of the missile.

In their latest iterations, the landing gear isn’t even necessary in higher re-entry phases to slow the rocket down anymore.

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What was the Su-27SM the indicator on the windshield like?

Is this garbage supposed to be a real source?

A Website titled: S*** Elon Says ?
From the wayback machine?

Kind of a stretch when you can simply go to Space X site or any study about the Falcon 9. Was this what you spent all day looking for? This garbage interview?

This is just crap a billionaire lol says. He says really idiotic things daily…

Wait… Do you actually think Elon Musk is a scientist & inventor?? You think he has any clue about space flight? Let me guess you think he invented the electric car? LMFAO

What does this garbage have to do with grid fins?

Any projected area, surface & mass can reduce terminal velocity lol.

Yes, you increase the surfaces area of a falling object through a gas or liquid it will reduce its terminal velocity. This means nothing LMFAOOO

ANY surface can be used to reduce terminal velocity. Even LANDING GEARS. That is why it was mentioned. Do you even know what terminal velocity is??? lol

Jesus Christ, you are brilliant.
The landing gear already works to provide drag, they get dual use out of the landing gear.
Not the Grid fins.

LMFAO. Even Elon confirms the landing gear provides drag. Not the Grid Fins. The grid fins control the Falcon 9’s attitude roll, yaw & pitch.

Your 4th grade reading comprehension full display once again.
You even highlighted the proof that your whole idea that grid fins are used as airbrakes is completely made up.

image

Dude omg this hilarious! My boy, do you think before you post??
You invertedly highlighted the proof that I was right from the beginning…

Grid fins are not airbrakes, neither are they designed to produce more drag. They are hypersonic grid fins.
The Falcon 9 slows down with its reentry booster & massive drag of the landing gear. According to Elon Musk.

Thanks Elon!

I don’t want to enter into this, but I don’t think MiG is saying that the spaceX fins are purposefully designed to be draggy, just that if they are a bit draggy it is not the end of the world. Not totally optimized to be low drag, which would be a design goal for a missile. Since they are used to control the descent if they drag it isn’t a bad thing

Here,

Spoiler

Can I help you with anything else?

For vehicles that renter the earth’s atmosphere near 17,500 mph it is, absolutely.
There is not really any margin for error in the subject putting 220,000–331,000lb payloads into to low earth orbit.

The falcon 9 needs efficient attitude control in the following speed regimes: reentry, high hypersonic, hypersonic, supersonic & transonic. The Grid Fins are aerodynamically designed to work in all 5. However, it is predominately a Hypersonic grid fin.

Making them too draggy when operating in retry can lead to catastrophic consequences.

Too draggy reduces number of flights from increased wear & stress. They can become inoperable in flight due to the immense compression & superheated airflow at reentry speed & hypersonic etc. Or they can simply be ripped off the Falcon 9 and likely take down the vehicle in the process (Space Shuttle Columbia).

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You should try comic sans with the bold and enlarged letters

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Spoiler

max_g360_c12_r1x1_pd20
max_g360_c12_r4x3_pd20

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image

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Su-57 is different, of course it can carry quite a few missiles on external pylons as well. What is the maximum payload?

The most common figure is 10 tons…

I meant the most number of mounted air to air missiles?

14-16 pieces(P-77-1/ R-74M/R-74M2)…

Spoiler

In_EiyVkBjE

https://m.vk.com/wall-140312885_307109

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So around 12x R-77-1 and 2x R-74M2? Possibly more.

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The scheme from Arma 3, nothing to do with the IRL

RD-180 and Merlin are completely different engines.
RD-180 is closed cycle double chamber engine.
Merlin is open cycle single chamber engine.

They are different engines.

Where was it stated that they are one of the same?

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SpaceX uses RD-180 on Falcon 9

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Any day now Ziggy

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It does not contradict other data!
http://otvaga2004.mybb.ru/viewtopic.php?id=1998&p=29#p1365056

Wait is that what you’re arguing??

Jesus christ stop making me agree with Mig_23M. The Grid fins ABSOLUTLY act as airbrakes. Really, anything that generates lift (in this case the force needed to manipulate the booster) necessarily generates drag and it’s a proportional relationship. If it generates a force on the booster through aerodynamic effects it MUST also generate drag.

They absolutely don’t. The Merlin engine used on the Falcon 9 is entirely homegrown. What you’re thinking of is the Atlas 5. That one did use the RD-180 and that’s why it’s now retired, replaced by Vulcan using BE-4s

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