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Apogee Rocketry Workshop #434:

How Does Gap Staging Work for Rockets?

Advanced Construction Video

If you’ve ever hesitated to build a scale model or multi-stage rocket because the motors can’t be stacked directly, this one’s for you.

Gap staging—where there’s space between the booster and upper-stage motors—sounds risky. What if the upper stage doesn’t light? Will it just tumble to the ground? In our latest video, we break down exactly how to make it work, step by step.

Here’s what we cover:

  • What gap staging actually is and when you'd use it
  • The simple trick of adding vent holes (and where exactly to put them)
  • Practical advice on hole sizes that actually work
  • How far apart your motors can realistically be separated 
  • We also touch on indirect staging with electronics for those of you looking to use composite motors instead of black powder ones.

You’ll see real examples, like how the Aerodactyl kit handles massive gaps and why the Arc Stratus uses clever hole placements. No jargon, no hype—just practical tips to keep your rockets from becoming lawn darts.

Check out the video now!

P.S. Need supplies? We’ve got motors, kits, and vent-hole-friendly body tubes over at apogeerockets.com.

View this week's Rocketry Workshop Videos here. Tiime: 10:32 min:sec

Previous videos are found on our archive page.

 

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Newest Products From Apogee Components

Check out the latest products to hit Apogee's shelves!

38mm Plastic Motor Retainer

38mm to 74mm Motor Mount Adapter Kit

Losing a motor mid-flight isn’t just embarrassing—it’s avoidable. Tape slips. Friction fits fail. Screw-on retainers, like this one, however, are the gold standard for serious rocketeers. This system builds on decades of proven design but cuts weight and cost by embracing advanced 3D-printed urethane resin. It’s not just functional—it’s a nod to the innovators who prioritized reliability over shortcuts. Save money, save your casing... get one today.


38mm/74mm Motor Mount Kit

38mm to 74mm Motor Mount Adapter Kit

This motor mount adapter kit allows you to put a 38mm engine mount tube inside a 3-inch (74mm) thin wall airframe tube. Features a heavy duty engine mount tube, and 1/8" thick plywood centering rings.  You'll save time because there is no cutting tubes to the correct lengths, nor do you have to search high-and-low to find all the correct size centering rings. Everything is already included in this motor mount kit. Check it out here.


Cosmodrome Kits

Cosmodrome Kits

On occasion, we get in a batch of kits from Cosmodrome Rocketry. These are all high power kits, and are scale models. We have the Vostock, Nike Smoke, Black Brant II, and the Aerobee-Hi. They usually don't stay in stock very long, so if you want one, you better claim yours today.


LOC Magnum

LOC Magnum

We're selling out our supplies of the LOC Magnum, and we've only got a few left. It was recently changed to a single motor-mount, so you'll find it much easier to build than it was before. Get one while we still have them in stock.  


Apogee Arc Stratus

Apogee Arc Stratus

Our new Arc Stratus kit is out, and is perfect for intermediate level rocketeers and STEM enthusiasts. This two-stage powerhouse soars on twin 24mm motors, leveraging gap-staging tech to ignite its sustainer flawlessly mid-flight. Its rugged laser-cut basswood fins and through-the-wall mounting provide stable ascents and touchdown durability, while the 9-inch clear payload bay invites creativity—launch micro experiments, trackers, or symbolic mementos, all cradled in a sleek, BT-60 airframe. Inspired by the legacy of the Estes Loadstar, but refined with modern muscle, the Arc Stratus balances nostalgia with innovation. Also comes with Kevlar shock cord, spring steel engine clips which enable motor swaps in seconds, and chrome decals that scream "look at me." Whether you’re chasing altitude records, classroom wow-factor, or the thrill of mastering two-stage flight, the Arc Stratus doesn’t just climb—it carves your name into the sky. Are you ready to challenge the laws of physics and launch your legacy? [Shop Now].


 

RockSim Live Training - Every Friday

 

Launch of the Week!

Launch of the Aerodactyl 2-stage rocket.

This week's Launch of the Week simulation in the Launch Visualizer, is the Aerodactyl TS kit using a F15-0 gap-staged to a F15-6 from the launch site of the SkyBusters club in Northern Ohio. Check it out!

Customer Testimonial Customer Comments

“First, I find Apogee customer service exemplary. Real, knowledgable people, by email and phone, very quickly resolved a minor problem RockSim problem I had with my new Mac. And even Tim Van Milligan responded on the same day (!), he quickly cleared up some fairly trivial points that confused me, always with unfailing good humor. Second. Sure, there are a number of fine vendors, yet Apogee has a tremendous selection, just about everything you'd need, and really good quality items. Almost like the Amazon (in a good way) of rocketry. Lastly, just consider the instructional videos and newsletters—always something to learn.”

--  Robert Wieting

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