Reliable Rocket

09/20/2026

Reuben, You are our 500th follower! How about a winder on us?

09/20/2026

Whose says you can't wind 3/16" flat Kevlar harness into 4" coils?

09/08/2026

Hope your guesses are in as it is time for the reveal. Apologies for the audio, apparently the mic on my GoPro is going bad. Fortunately, I was able to save the recording using AI in Adobe Premier Pro, but was not perfect.

The length of the harness is a little more than 50’ making Richard Tuggle’s guess of 40’ the winner. David Snyder is a close 2nd at 35’ so we will send him one too. Guys, PM me your physical addresses.

Revealing just how many feet of harness you can coil into a few inc...

07/19/2026

Large order going out to an international customer. 4", 5", and two 6" winders and spacers. Yes, they fly some BIG rockets with long harnesses.

07/11/2026

We have done it! Necessity has mothered invention. Introducing the 38mm adapter. 2nd piece from the left adapts a 50mm winder down to 38mm coils.

So let’s have a little fun with this… The person closest to guessing the length of the harness in the coil stack pictured here will receive a prize, the 50mm winder and 38mm adapter you see here. You have 1 week to guess. Note: all the information you need to make a good guess is obvious in the picture except for the tubular Kevlar width of 3/16”.

Use comments to make you guess.

06/14/2026

Occasionally I get questions about what spacers are needed. The spacers of course reduce the headspace so multiple widths can be wound/coiled without needing multiple winders for the same diameter. The headspace for a winder is described in the description (and model number) of the winder. For example, the little 50mm, Harness Winder (50mm)(8mm) has a head space of 8mm so the best spacer for 3/16” (5mm) Kevlar is the 3mm spacer. You can see the spacer underneath the coil pictured below.

05/16/2026

Reliable Rocket will be attending AIRfest 32 (September 4th – 7th 2026) with Wright Brother and Sisters Used Rockets and Space Salvage. We will be taking advanced orders for the event – performing demonstrations of the configuration and use of our Harness Winder and Recovery (chute) at AIRfest. For more information visit our page @ https://www.facebook.com/ReliableRocket.

01/24/2026

A NAR post from 2021. Batteries back "in the news" over at The Rocketry Forum. https://www.rocketryforum.com/threads/lipo-or-li-ion-batteries-for-rocket-on-board-electronics-what%E2%80%99s-your-opinion.194251/

07/06/2025

Quite surprised with the performance of a $30 Endoscope.
Anyone venture a guess about what I'm inspecting, where, and why?

09/01/2024

Hot off the printers is a prototype of our 3” winder!

A little history… In 2016 I began work on a flying mascot for my kid’s elementary school. It became apparent that space in the airframe would be at a premium. So, to minimize the space occupied by the harness while still keeping it nice and neat, the technique of coiling the harness around its center was born. In 2018/2019 I taught the UTK Rocket Team the technique. Very soon after, a team member Drew Nickle designed, printed, and used the first winder. We know have 6 sizes from 2 – 8”.

Pictured here is a frame from the 4th flight of the Marvin Wright Rocket at Southern Thunder 2017 at the MC2/HARA Sod Farm outside Manchester TN.