All Rocketry Blogs

High Power Rocketry: Estes Pro Series II motor retainers - final review (2012-03-04)

After finishing up the level 2 rocket, I used a bit of JB weld to install rail guides, reinforce the airframe join in the 38mm Thunderbolt, and mount two of these motor retainers. All in one mix! ... [Read More]

High Power Rocketry: Estes 29mm motor retainer (2012-05-16)

Finally got out to a launch, testing this plastic motor retainer on an H410. In the first image below, you can see the motor installed before flight. It looks crooked, but that is just the yellow ... [Read More]

Rocket Dungeon: More on the new Estes retainers (2012-07-02)

I just retrofitted my Estes-era NCR Archer with one of these retainers. The motor mount extended just far enough to fit the retainer perfectly. It was also quite snug, which boosts my confidence in ... [Read More]

Rocket Dungeon: Harpoon motors and Estes retainer issues (2012-07-12)

The other day, I went to Hobby Lobby hoping to use a coupon on an F50-6 motor. It appears I have no will power even though SU motors are more expensive than reloads. They had no F50s (i.e. they sold ... [Read More]

Rocket Dungeon: DIY 18mm retainers (updated) (2012-07-17)

The latest edition of the Apogee Newsletter ( Issue #317 ) describes how to make screw-on 18mm retainers from pint sized water bottles.  The article, written by Chris Michielssen (master ... [Read More]

Model Rocket Building: 18mm Retainer Article In Apogee Peak Of Flight #317 (2012-07-18)

  The Apogee Peak Of Flight Newsletter features an article I co-wrote with Geoffrey Dean Jackson or GDJ. (His signature on the Rocketry Forum) http://www.apogeerockets.com/ ... [Read More]

Shroudlines: Keeping It Together (2018-03-03)

A while back I decided to upgrade the motor retention on my upscaled Star Trek Starter Set rocket. My original setup was a couple of machine bolts that held a braided steel wire across the motor at ... [Read More]