Go Back   EcoModder Forum > EcoModding > Aerodynamics
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 11-08-2021, 03:51 PM   #1 (permalink)
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 15,861
Thanks: 23,922
Thanked 7,207 Times in 4,640 Posts
W.A.Mair's boat-tail

Let's see if this works
https://ecomodder.com/forum/showthre...9-a-23877.html

__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 12-06-2021, 08:21 PM   #2 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 27,562
Thanks: 7,738
Thanked 8,554 Times in 7,041 Posts

hinnerspacenetwork.wordpress.com/2021/12/05/rocket-labs-next-generation-launch-vehicle-neutron/

The CEO, Peter Beck, says making the aft end bigger than the nose increases aerobraking so they don't need heat tiles.
__________________
.
.
Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster

____________________
  Reply With Quote
The Following User Says Thank You to freebeard For This Useful Post:
aerohead (12-09-2021)
Old 12-07-2021, 09:23 AM   #3 (permalink)
Somewhat crazed
 
Piotrsko's Avatar
 
Join Date: Sep 2013
Location: 1826 miles WSW of Normal
Posts: 4,043
Thanks: 462
Thanked 1,104 Times in 974 Posts
You only need heat resistant tiles if you re-enter in a hurry. If you do the skip re entry technique, stainless works fine. Rutan uses carbon fiber.
__________________
casual notes from the underground:There are some "experts" out there that in reality don't have a clue as to what they are doing.
  Reply With Quote
The Following User Says Thank You to Piotrsko For This Useful Post:
aerohead (12-09-2021)
Old 12-07-2021, 01:09 PM   #4 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 27,562
Thanks: 7,738
Thanked 8,554 Times in 7,041 Posts
A caliper held to the screen suggests ~50% greater diameter at the aft end. One wonders if it makes a difference on the way up.

Also the effect of four supersonic shock waves from the four protruding landing legs.
__________________
.
.
Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster

____________________
  Reply With Quote
The Following User Says Thank You to freebeard For This Useful Post:
aerohead (12-09-2021)
Old 12-09-2021, 11:18 AM   #5 (permalink)
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 15,861
Thanks: 23,922
Thanked 7,207 Times in 4,640 Posts
aero braking

Does she come in aft- first at all times, or nose-first, then transition?
__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
  Reply With Quote
Old 12-09-2021, 11:33 AM   #6 (permalink)
Master EcoModder
 
aerohead's Avatar
 
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 15,861
Thanks: 23,922
Thanked 7,207 Times in 4,640 Posts
way up

Quote:
Originally Posted by freebeard View Post
A caliper held to the screen suggests ~50% greater diameter at the aft end. One wonders if it makes a difference on the way up.

Also the effect of four supersonic shock waves from the four protruding landing legs.
Under rocket thrust, the expanding gases act as a virtual structural boat-tail. The drag will vary from subsonic- to- transonic-to- supersonic.
A larger rear cross-section is like arrow feathers.
On all launches, you'll here cap-com announce ' max-Q', where the airframe is experiencing the highest aerodynamic loading of the flight.
If the 'tube' isn't crushed by then, between payload and thrust, or deformed by aeroelasticity, the engineers have made a successful design.
And as P. has mentioned, if intermittent thrusting, never allows the tube to exceed its aerodynamic heating threshold velocity, it won't need tiling.
__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
  Reply With Quote
Old 12-09-2021, 01:14 PM   #7 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 27,562
Thanks: 7,738
Thanked 8,554 Times in 7,041 Posts
Quote:
Does she come in aft- first at all times, or nose-first, then transition?
The videos I've seen looks like it comes in tail first like the Falcon, not belly-flopping like the Starship. That rotation must be a wild ride.

The built-in landing legs eliminates the mid-air catching system.

__________________
.
.
Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster

____________________
  Reply With Quote
The Following User Says Thank You to freebeard For This Useful Post:
aerohead (12-09-2021)
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com