Go Back   Defense Technology & Military Forum > Global Defense & Military > Space & Defense Technology
Forgot Password? Join Us! Its's free!

Defense News
Land, Air & Naval Forces






Military Photos
Latest Military Pictures

Miramar_14_MV-22_1621a.JPG

Miramar_14_MV-22_1726a.JPG

Miramar_14_MV-22_0074a1.JPG

Miramar_14_FA-18C_0409a.JPG
Defense Reports
Aerospace & Defence







Recent Photos - DefenceTalk Military Gallery





mars mission

This is a discussion on mars mission within the Space & Defense Technology forum, part of the Global Defense & Military category; what would be the minimum velocity increment required for a two impulse transfer from earth to mars about the sun??...


Reply
 
LinkBack Thread Tools Rate Thread
Old March 20th, 2012   #1
Just Hatched
Private
No Avatar
Join Date: Mar 2012
Posts: 3
Threads:
mars mission

what would be the minimum velocity increment required for a two impulse transfer from earth to mars about the sun??
crazydevil is offline   Reply With Quote
Similar Threads
Thread Thread Starter Forum Replies Last Post
Royal New Zealand Navy Discussions and Updates Padman Navy & Maritime 3780 20 Hours Ago 09:43 AM
New Propulsion Concept Could Make 90-Day Mars Round Trip Possible XEROX Space & Defense Technology 12 October 16th, 2004 11:38 AM
NASA Selects Contractor For First Prometheus Mission To Jupiter XEROX Space & Defense Technology 2 September 22nd, 2004 10:45 AM
BAE Systems microprocessor guides Rover landing on Mars adsH Space & Defense Technology 2 March 31st, 2004 12:29 PM
NASA AND MARS! azam145 Space & Defense Technology 17 February 22nd, 2004 02:20 PM

Old March 20th, 2012   #2
Senior Member
Brigadier General
No Avatar
Join Date: Feb 2007
Location: Sydney
Posts: 1,747
Threads:
Quote:
Originally Posted by crazydevil View Post
what would be the minimum velocity increment required for a two impulse transfer from earth to mars about the sun??
Are you asking what would be the velocity for a simple earth - Mars journey? Unmanned, with no time pressure. You could do it over years, decades.

If you didn't have a two firing mission, then lowest energy would be the inter planetary transport network. I think the original NASA proposals had a possible Venus flyby so the direct route may not always be the best one to take.
StingrayOZ is offline   Reply With Quote
Old March 21st, 2012   #3
Just Hatched
Private
No Avatar
Join Date: Mar 2012
Posts: 3
Threads:
Quote:
Originally Posted by StingrayOZ View Post
Are you asking what would be the velocity for a simple earth - Mars journey? Unmanned, with no time pressure. You could do it over years, decades.

If you didn't have a two firing mission, then lowest energy would be the inter planetary transport network. I think the original NASA proposals had a possible Venus flyby so the direct route may not always be the best one to take.
yes , im talking about simple earth mars journey with no time pressure based on hoffmans transfer.Neglection the escape velocity of earth, we can assume the unmanned aircraft rotating in earths orbit around the sun.From there , with two velocity increments , it can be transferred to the orbit around mars.If so what would be those velocity increments.(im just doing some theoretical work on the same and would love to have your inputs )
crazydevil is offline   Reply With Quote
Old March 21st, 2012   #4
Senior Member
Brigadier General
No Avatar
Join Date: Feb 2007
Location: Sydney
Posts: 1,747
Threads:
Its been ages since I studied orbital mechanics, I have a feeling its between 3-5.7km/s if you want a single shot from earth orbit. I see a bit of casual googling turns up loads of crap, I can see why your asking. I'll do a journal search at work and have a go at doing a napkin calculation.
StingrayOZ is offline   Reply With Quote
Old March 21st, 2012   #5
Defense Enthusiast
Corporal
No Avatar
Join Date: Aug 2009
Posts: 144
Threads:
Quote:
Originally Posted by crazydevil View Post
yes , im talking about simple earth mars journey with no time pressure based on hoffmans transfer.Neglection the escape velocity of earth, we can assume the unmanned aircraft rotating in earths orbit around the sun.From there , with two velocity increments , it can be transferred to the orbit around mars.If so what would be those velocity increments.(im just doing some theoretical work on the same and would love to have your inputs )
Don't be lazy, just wiki "hoffman's transfer" and plug in the numbers, the formula is already there.
PhysicsMan is offline   Reply With Quote
Old March 21st, 2012   #6
Senior Member
Brigadier General
No Avatar
Join Date: Feb 2007
Location: Sydney
Posts: 1,747
Threads:
Hmm is this a home work question? Lack of context and how it structured implies yes.

If you are after the velocity required with instant velocity (ie unrealistic) then it is a simple application of the Hohman (as the new texts call it) orbit formula which is really just the conservation of energy.

Remember your changing orbits around the sun.

It however isn't the ideal equation to calculate interplanetary travel because it doesn't take in effect all of the factors that realistically happen.
StingrayOZ is offline   Reply With Quote
Old March 22nd, 2012   #7
Just Hatched
Private
No Avatar
Join Date: Mar 2012
Posts: 3
Threads:
Quote:
Originally Posted by StingrayOZ View Post
Hmm is this a home work question? Lack of context and how it structured implies yes.

If you are after the velocity required with instant velocity (ie unrealistic) then it is a simple application of the Hohman (as the new texts call it) orbit formula which is really just the conservation of energy.

Remember your changing orbits around the sun.

It however isn't the ideal equation to calculate interplanetary travel because it doesn't take in effect all of the factors that realistically happen.
.Ive been reading a little bit about interplanetary orbital transfers in MIT opencourse materials and juz want wanted to calculate theoretically the velocity increments needed for the transfer.I did some vague calculations and got first velcoity increment from orbit of earth around the sun to elliptcal orbit around the sun as 2.9km/s and then to an orbit of mars around the sun as 2.6km/sec(talking into consideration only the conservation of energy).But couldnt find any source to verify my answers.Further i want to add practcality into this theoretical speed to arrive at final speed required and would be great if you guyz could help me out
crazydevil is offline   Reply With Quote
Old August 5th, 2012   #8
Defense Enthusiast
Master Sergeant
No Avatar
Join Date: Jan 2007
Posts: 381
Threads:
Oke boys, today Mars Science Laboratory will land on the surface of Mars. It will be about 2 hours from now.....cant wait until we receive the first data and pictures.....

For more info and updates:
Mars Science Laboratory
Sandhi Yudha is offline   Reply With Quote
Old August 6th, 2012   #9
Defense Enthusiast
Master Sergeant
No Avatar
Join Date: Jan 2007
Posts: 381
Threads:
Mars Science Laboratory just landed.
(more or less) live at CNN.com International - Breaking, World, Business, Sports, Entertainment and Video News
Sandhi Yudha is offline   Reply With Quote
Old August 7th, 2012   #10
Defense Enthusiast
Lieutenant
No Avatar
Join Date: Mar 2010
Location: USA,TN
Posts: 553
Threads:
Quote:
Originally Posted by Sandhi Yudha View Post
Mars Science Laboratory just landed.
(more or less) live at CNN.com International - Breaking, World, Business, Sports, Entertainment and Video News
Its awesome aint it

The mission is for 2 year but if this one can stand up to the 5 years till the reactor runs out it would be awesome and kinda normal. The others were only supposed to last a few months.
Belesari is offline   Reply With Quote
Old 4 Weeks Ago   #11
Defense Enthusiast
Master Sergeant
No Avatar
Join Date: Jan 2007
Posts: 381
Threads:
In just three days two space probes were inserted in orbit into Mars, the American Maven (22 September) and two days later the Indian Mars Orbiter Mission (MOM), also called Mangalyaan (24 September).

Maven's mission goals include determining how the Martian atmosphere and water, presumed to have once been substantial, were lost over time.

MOM has two objectives, first as a technology demonstrator, because its India's first space probe to Mars, and the secondary objective is to explore Mars' surface features, morphology, mineralogy and Martian atmosphere using indigenous scientific instruments. A great job done by the Indians, specially if you look to the quite young history of Indian Space Research Organisation (ISRO).

NASA's Newest Mars Mission Spacecraft Enters Orbit around Red Planet -- ScienceDaily
India's First Mars Probe Makes Historic Red Planet Arrival

Hopefully these probes can finish their missions and provide us a lot of new information and knowledge.
Sandhi Yudha is offline   Reply With Quote
Old 4 Weeks Ago   #12
Grumpy Old Man
General
gf0012-aust's Avatar
Join Date: Dec 2003
Location: Australia
Posts: 14,787
Threads:
that's a job well done by the Indians
________________
A corollary of Finagle's Law, similar to Occam's Razor, says:

"Never attribute to malice that which can be adequately explained by stupidity"
http://au.linkedin.com/pub/gary-fairlie/1/28a/2a2
http://cofda.wordpress.com/
gf0012-aust is offline   Reply With Quote
Old 4 Weeks Ago   #13
Senior Member
Colonel
Ananda's Avatar
Join Date: Oct 2008
Posts: 1,323
Threads:
Yes, just visit some other forums where many comments either thrashing Indian achievements or just questioning why a 'poor' third world nation (neglecting India economy size), put so much money on this space program , not on social and poverty eradication.

This is great achievements for India, why some people simply can not accept that, is beyond me. They manage to send Mars orbiter for the first time and first try, with much cheaper budget than everybody else Mars budget. If that not great achievements for some people, then I don't know what to say.
Ananda is offline   Reply With Quote
Old 4 Weeks Ago   #14
Defense Professional / Analyst
Corporal
No Avatar
Join Date: Aug 2012
Posts: 132
Threads:
Good! Now the ISRO can beg their officials for funds for more missions to Mars (ignoring potentially more productive mission areas) every two years (coincidentally, just within those officials' re-election pattern) just like NASA does./cynicism

Though, honestly, good on the ISRO and kudos for their accomplishment.
Blackshoe is offline   Reply With Quote
Reply

Thread Tools
Rate This Thread
Rate This Thread:


All times are GMT -4. The time now is 06:11 AM.