HiPower-Rocketry.com   Build Big, Fly High

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What's New

Mark June 17-19, 2005 down on your calendars.  The North East Regional Rocket Festival will be the areas premier event of the year.  See the official NERRF website for more details.

SpaceShip-1 wins the X-Prize.  Congratulations to the scaled team!  10-4-04 the birth of a new space age.

Congratulations Burt Rutan and Scaled Composites for getting half way to the X-Prize and all the way into space! 

Due to a family emergency I can not attend LDRS, I hope that those of you going all have a great time.  The online album has the LDRS days all unlocked so please feel free to upload your pics of LDRS to share.

Combined CTRA - METRA launch calendar back online.  Click on Launch Calendar on the right hand navigation panel.

On-Line Album added!
Upload your favorite rocketry pictures and vote on them.  Special LDRS section ready and waiting for LDRS pictures

L3 project postponed.  Due to increased demands at work I am unable to complete my L3 project in time for LDRS.

S.S. Eclipse flies wireless video payload again.  Go to the Movie Roc page.

Completed Jeff Taylor's EX class.
If you are interested in EX stop by the LOKI site and see when he's offering it again, you will not be disappointed.

Joined Rocketry Top 50
Before you leave click on the TOP 50 link to vote for this site

Combined Launch Calendar Added!
All CTRA & METRA launches included
See link on right side of page

L3 project construction begins.
check the L3 page for updates

Salvatore Pais responds to my comments about his article in the Homeland Defense Journal.
See his email to me and my response on the HomePage.

Nor-East launch season begins
OK folks time to dust off the rockets, its flying time
Check CTRA-NARCONN and METRA sites for schedules.

Loki Research becomes a Tripoli Certified Motor manufacturer
while there are no certified motors yet, we can look forward to having more motor choices

 

  

What is HPR?

Most of us got our start in model rocketry flying ESTES style kits.  These models flew using motors with designations like A8-3, C6-7, D12-5.  In rocketry, motor designations tell you a number of things.  The letter part of the designation tells you the total impulse of the motor in Newton-Seconds.  The number after the letter tells you the average thrust in Newtons.  The final number tells you the delay in seconds before the ejection charge goes off.  High Power Rocketry (HPR) typically utilizes motors that are larger than "G".  The definition of what is HPR as per the National Association of Rocketry (NAR) is as follows:

bulletUses a single motor of more than 160 NS total impulse ("H" motor or larger)
bulletUses multiple motors (cluster) that exceed 320 NS total impulse
bulletUses a motor with more than 80N average thrust.
bulletWeighs more than 1500g including motor(s)
bulletIncludes any airframe parts of ductile metal.

Once any of the above criteria are met you have crossed the line and moved on to HPR.  There are at this level a few regulations to contend with, and certification in order to purchase motors.  In the United States the two recognized sanctioning bodies are:

        National Association of Rocketry (NAR)

         Tripoli Rocketry Association (Tripoli or TRA) 

If you are going to be launching at either NAR or TRA sanctioned launches, membership in one or the other will be required in order to certify and begin your journey into HPR.

 

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