Welcome to (formerly Essence's Model Rocket Reviews or EMRR). is the home of almost 5000 reviews of rocketry kits and products. Written by visitors to like you, the reviews cover everything from low-power model rocket kits to high-power rocket motors.

The site's Flight Log allows you to record and share your rockets and their flights.  The Builds feature helps you document your rocketry projects. 

At, you'll also find a large collection of rocketry resources such as a list of rocketry clubs, a calendar of rocketry events, and large libraries of OpenRocket design files and Rocksim design files. A number of rocketry tools and calculators are available to help you design, build, and fly your rockets.

As you explore, you'll also find a number of fun things such as a huge library of rocketry videos and a collection of photo albums. Community

Note: The web site is down right now as the software is being updated.

The Community adds a new layer of social interaction to Log in with your registered email address and password to join the Community.

You can now manage your Flight Log at While you can continue to manage your Flight Log here (and the information is shared between the two sites), I encourage you to try using the new site.

The forms at for entering and editing flights are much better than the ones here and they will continue to be enhanced as time goes by.

See: What is Community?


The mobile site makes it easy to add flights to your Flight log using a smart phone or tablet. Visit:

The mobile site allows you to view and enter flights in your Flight Log and to view and add rockets to your Rocket Gallery using simple controls designed for smartphones and tablets. You must have an existing account which the mobile site will ask you to log into.

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Today's Featured Review

Clone - Challenger II (Scratch)


Construction Rating:
Flight Rating:
Overall Rating:

Contributed by Bill Eichelberger


The Estes Challenger II is another in the line of rockets that uses the fin can that originated with the Enerjet 1340 and is currently available molded in yellow as part of the Estes Eliminator.  The Challenger II is a fairly versatile rocket that can be built to fly on motors from 18mm to 29mm depending on the size of your field.  My field is B6-4 Field, and since they don't make a 29mm B engine, I went with the 18mm mount.


  • BT-56 body tube (18.0")
  • BT-56 fin can (Estes Eliminator kit)
  • PNC-56A nose cone (Estes Eliminator kit)
  • 18mm engine mount (forgotten BT-55 Estes kit)
  • 24" Kevlar shock cord
  • 24" sewing elastic shock cord
  • Medium snap swivels (2)
  • 18" parachute


Read the rest of the review ...

Today's Featured Flyer

mohamed kaka

AKA: moadka

Certification Level: PhD fluid Mechmics

Favorite Rockets: SAM



Name:                          Mohamed Kaka



E mail :



Date &Place of birth 01.06.1968


Work Experience:


Search Scientific Studies and Research Center .

 Fluid Mechanical Department

 -Unmanned Aircraft design

  SSRC Experimental aerodynamic

 -Research aircraft design 

 - Aerodynamic test

 -Analysis aerodynamic tests

  Research of Local design

 Numerical study of flow around spheres and their key forces 


 2009 PhD   of Science, Beihang University, China

 2003 Master of Science, Beihang University, China

 Aerodynamic Testing and engineering computation for wing-body

 1995 Diploma of Aeronautic Engineering,

 “Unmanned aircraft design Algorithms “

 1992 Bachelor of Mechanical Engineering

  ‘’optimization design of sedan car”

 Publications Journals

 1- “Longitudinal Aerodynamic Characteristics of the Novel Wing-Body”

      Computer aided drafting, design and manufacturing, vol.17 no.2 2007

2-  Numerical study of sphere drag coefficient and double spheres drag“computer aided drafting, design and manufacturing, vol. 19 no.1 2009…….. Numerical study of flow around multi-spheres

Visit mohamed kaka's

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eBay Charity Auctions

Estes Star Trek Enterprise Rocket Model Kit IOBgwspokane 3$10.50About 1 Day
Goodwill Industries of the Inland Northwest
Cox Rocket Launch Padcarsnik66 0$0.99About 1 Day
Blind Cat Rescue & Sanctuary, Inc.
SEMROC XES-K9 SPACEMAN FLYING MODEL ROCKET KIT, OOP, USA, uses Estes enginesjeffyjeep 0$14.95About 8 Days
Wounded Warrior Project
SEMROC KS-2 APOLLO CAPSULE MODEL ROCKET KIT, 1/70 SCALE, OOP, uses Estes enjeffyjeep 1$19.95About 8 Days
Wounded Warrior Project

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Today's Featured Photo

NEFAR Launches

November 2014 Launch

Aerial Shot of Launch at Bunnell Blast 2014

Photo by Roger Smith

Today's Featured Video

Rocketry - Estes Historic Document - 1961

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Today in Rocketry History

On This Date in History

1958-01-31 - First US Satellite in Orbit
Explorer 1 became America's first satellite on January 31, 1958.

Featured Rocketry Blog Posts

Rocket Dungeon: Vintage rocket powered monocopter may be up for grabs
Early in my blogging days and near the peak of my fascination with monocopters, I found some photos of the Rotary Space Ship that was manufactured by the Brown Manufacturing Company in the '50s/60s. I was recently contacted by one Richard Moore, who has owned one since around then. He says he may be putting it up on eBay so, if anyone is interested, you should keep an eye out. If you want to make an offer before that, I can forward your contact info to him. He was also kind enough to provide some nice photos:
[Read More]

Model Rocket Building: New Products Reply From Estes John Boren
From John Boren (JumpJet on TRF): "Sorry I haven't posted in this thread yet but I couldn't find it and since I seldom go to the Watering Hole section it was by chance I found this thread since it was linked in another thread. As you can see my original question or statement if you wish to call it that instead, isn't an easy one to answer or for a company to act on. There are some common wants but for the most part everyone wants something different as their number one thing, which is common no matter what the topic is. I see more engines and parts are pretty much at the top of the list. ...
[Read More]

Greg Smith's Blog: Better living through additive manufacturing of a V2!!
Some of you know that I've been dabbling in 3D printing for three-ish years. I ceaselessly admire the astonishing progress of garage-based hardware hackers using intellectual property from patents that have expired in recent years. It appears that the masses using democratized technology continue to move far faster than the corporations that developed the IP in the first place!! One new startup, 3D Printer Works , arose from a successfully funded Kickstarter campaign. I like their style and recently ordered their first product, The CreatorBot 3D , for home use: And yes of course I upgraded ...
[Read More in This Series]

Model Rocket Building: World Record Rocket
For the "Thunder Down Under" Rocketry Victoria is making a world's record rocket - A FULL SIZED V2! Check out the YouTube video CLICK HERE Follow the progress on their Facebook Page CLICK HERE
[Read More in This Series]

Rich's Rockets: Catalog trends
For those of you who are old enough to remember what “catalogs” are, there’s a new one from Estes. I’ve been compiling some statistics from historical Estes catalogs. Here are some numbers from 40, 30, 20, 10, 1, and 0 years ago — numbers of kits, and percentages of the total, for each skill level: ...
[Read More]

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Rocketry Deals

Product NameList PriceSale PriceDiscountStore
Dremel 4000-6/50 120-Volt Variable-Speed Rotary Kit$269.58$139.0048.44%
Estes Recovery Wadding$7.99$4.1847.68%
Quest Aerospace Viper Model Rocket Value Pack (12)$99.99$53.7046.29%
Badger Air-Brush Company Minitaire Color Paint Set with Color Coat/Paint Retarder$271.40$151.0044.36%
Scientific Explorer's Meteor Rocket Science Kit$21.99$13.0940.47%
Estes 302267 18 inches Parachute$7.99$4.9038.67%
Quest Aerospace Starhawk Model Rocket Value Pack (25)$159.99$99.2937.94%
Testors Promotional Enamel Paint Set$13.00$8.0737.92%
Estes Ventris$64.99$41.8735.57%

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