Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 59 users online :: 3 registered, 0 hidden and 56 guests


Most users ever online was 155 on Mon Aug 15, 2016 1:40 am

Registered users: Bing [Bot], Google [Bot], Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

Expandable Wing Projectile

Post about things you have launched or thought about launching. Also post about various materials used for building cannons. No posts about explosive projectiles!
Sponsored 
  • Author
    Message

Unread postAuthor: daxspudder » Tue Jun 17, 2008 8:29 pm

POLAND_SPUD wrote:3 does not work well... don;t ask me why I read it long time ago - anyway have you seen any rocket that has 3 tailwings ?


No. But a this is more of a missile in concept, which is more like an airplane, and last time I checked, every commercial airliner has 2 ailerons and 1 vertical stabilizer aka 3 tailwings
  • 0

"<I>For dare to be peace, I have to keep at it everyday, da Man doesn't take days off so neither can I</I>" -<B>Bob Marley</B>, day before a performance, a day after being shot in the chest. "<I>If you are the big, big tree, we are the small axe, ready to cut you down!</I>" -Bob again :brave:
User avatar
daxspudder
Captain
Captain
 
Posts: 300
Joined: Thu Apr 24, 2008 10:22 pm
Reputation: 0

Unread postAuthor: sandman » Tue Jun 17, 2008 8:33 pm

POLAND_SPUD wrote:anyway have you seen any rocket that has 3 tailwings ?
The Space Shuttle
  • 0


sandman
Colonel
Colonel
 
Posts: 672
Joined: Thu Mar 15, 2007 6:59 pm
Reputation: 0

Unread postAuthor: daxspudder » Tue Jun 17, 2008 8:40 pm

sandman wrote:
POLAND_SPUD wrote:anyway have you seen any rocket that has 3 tailwings ?
The Space Shuttle


:lol: good call :lol:
  • 0

"<I>For dare to be peace, I have to keep at it everyday, da Man doesn't take days off so neither can I</I>" -<B>Bob Marley</B>, day before a performance, a day after being shot in the chest. "<I>If you are the big, big tree, we are the small axe, ready to cut you down!</I>" -Bob again :brave:
User avatar
daxspudder
Captain
Captain
 
Posts: 300
Joined: Thu Apr 24, 2008 10:22 pm
Reputation: 0

Unread postAuthor: sandman » Tue Jun 17, 2008 8:49 pm

just have to make a point, and if u guys still dont believe me, i can get out the rocket simulation software
  • 0


sandman
Colonel
Colonel
 
Posts: 672
Joined: Thu Mar 15, 2007 6:59 pm
Reputation: 0

Unread postAuthor: daxspudder » Tue Jun 17, 2008 8:59 pm

I believe, that is why I designed it that way
  • 0

"<I>For dare to be peace, I have to keep at it everyday, da Man doesn't take days off so neither can I</I>" -<B>Bob Marley</B>, day before a performance, a day after being shot in the chest. "<I>If you are the big, big tree, we are the small axe, ready to cut you down!</I>" -Bob again :brave:
User avatar
daxspudder
Captain
Captain
 
Posts: 300
Joined: Thu Apr 24, 2008 10:22 pm
Reputation: 0

Unread postAuthor: sandman » Tue Jun 17, 2008 9:03 pm

i know, but others doubt us
  • 0


sandman
Colonel
Colonel
 
Posts: 672
Joined: Thu Mar 15, 2007 6:59 pm
Reputation: 0

Unread postAuthor: Gippeto » Wed Jun 18, 2008 12:58 am

I built many a model rocket in my younger days.

Being a "typical" teenager (no offence), it didn't take long to figure out that making 3 fins took less time than 4. :D

All my rockets worked just fine with only 3 fins. I guess they never read that book either. :lol:
  • 0

"It could be that the purpose of your life is to serve as a warning to others" – unknown

Liberalism is a mental disorder, reality is it's cure.
User avatar
Gippeto
Donating Member
Donating Member
 
Posts: 2393
Joined: Sat Jan 19, 2008 10:14 am
Location: The Great White North...Canada eh!
Reputation: 11

Sponsored

Sponsor
 


Unread postAuthor: LynyrdSkynyrd » Wed Jun 18, 2008 1:03 am

now the question is: will a rocket design work the same at an angle as it would vertical?

I guess i'm just wondering if the front would dive b/c there's nothing to hold it up...

i could be completely wrong tho... i'm not an aerospace engineer or anything...
  • 0

User avatar
LynyrdSkynyrd
Sergeant
Sergeant
 
Posts: 93
Joined: Sat Aug 26, 2006 4:39 pm
Reputation: 0

Unread postAuthor: POLAND_SPUD » Wed Jun 18, 2008 7:25 am

hmmm that's what I read... it might be wrong :? - but if that is the case why the book is considered to be a milestone... lol there were very few people experimenting with rockets in 17th century....

I have to do some research if I find something that supports my claim I'll post it here...
  • 0

Children are the future

unless we stop them now
User avatar
POLAND_SPUD
Chief of Staff
Chief of Staff
 
Posts: 5405
Joined: Sat Oct 13, 2007 4:43 pm
Country: Israel (il)
Reputation: 10

Unread postAuthor: LynyrdSkynyrd » Wed Jun 18, 2008 7:33 am

I think to get the projectile to fly right with fins at an angle it needs to be spinning at a fairly good rpm. at least i'm pretty sure thats how those armor piercing tank rounds work.
  • 0

User avatar
LynyrdSkynyrd
Sergeant
Sergeant
 
Posts: 93
Joined: Sat Aug 26, 2006 4:39 pm
Reputation: 0

Unread postAuthor: POLAND_SPUD » Wed Jun 18, 2008 7:50 am

nahhh... AFAIK APFSDS rounds don't spin
  • 0

Last edited by POLAND_SPUD on Wed Jun 18, 2008 8:24 am, edited 1 time in total.
Children are the future

unless we stop them now
User avatar
POLAND_SPUD
Chief of Staff
Chief of Staff
 
Posts: 5405
Joined: Sat Oct 13, 2007 4:43 pm
Country: Israel (il)
Reputation: 10

Unread postAuthor: psycix » Wed Jun 18, 2008 8:02 am

Angled fins to make it spin will only increase resistance and slow the projectile down. Spinning the round is simply not needed because you already have fins.
  • 0

Till the day I'm dieing, I'll keep them spuddies flying, 'cause I can!

Spudfiles steam group, join!
User avatar
psycix
Donating Member
Donating Member
 
Posts: 3684
Joined: Mon Jun 25, 2007 7:12 am
Location: The Netherlands
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Wed Jun 18, 2008 8:07 am

POLAND_SPUD wrote:nahhh... AFAIK APFSD rounds don't spin


True, in fact those designed to be fired from rifled barrels have a slipping driving band (between the barrel and the sabot) to prevent spin being transfered to the projectile. Any rotational kinetic energy imparted on the projectile detracts from the linear kinetic energy of it's motion, and when you're trying to penetrate over 12 inches of angled tank armour, you need ever fraction of a ft/lb of energy you can muster.

This is also applied to some fin-stabilised HEAT rounds, as a rifled projectile tends to disperse the jet from the shaped charge through centrifugal energy, decreasing its effectiveness.
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Previous

Return to Construction Materials/Ammo Discussion

Who is online

Registered users: Bing [Bot], Google [Bot], Yahoo [Bot]

Reputation System ©'