Muster

Every reload is built for one case length. AeroTech RMS and Loki Research name it by impulse — RMS-38/360 and 76/6000, the number being the case's approximate newton-seconds — while Cesaroni Pro names it by grain count — Pro38-3G. A reload drops straight into its own case: a direct fit.

A longer case can fly a shorter reload too, by taking up the empty length with spacers — a spacer fit. AeroTech uses its Reload Adapter System (RAS); Cesaroni sells case spacers. Both cap it at two spacers, so a case reaches only one or two sizes shorter. Muster resolves the exact count where the manufacturer publishes the rule — AeroTech 38 mm and Cesaroni Pro29/38/54 — and elsewhere (AeroTech 29/54 mm, Cesaroni Pro24/75/98 and the 6GXL cases) it flags that spacers exist and points you to the instructions rather than asserting a step it can't source. Loki Research publishes no spacer system at all, so its reloads are direct-fit only — each one matched to its own case.

The mid-power RMS-29/40-120 case is a special case: its shorter reloads carry their own spacers in the box, so it flies a whole range with no separate adapter.

Muster keeps the brands apart on purpose — their hardware doesn't interchange — with one sourced exception the manufacturers themselves publish: at 75 mm and 98 mm, AeroTech RMS and Cesaroni Pro are deliberately cross-compatible. Cesaroni engineered its Pro75/98 reloads to share the RMS case and ships the o-rings for either brand, and AeroTech certified its own 75/98 reloads for Cesaroni hardware. Muster shows these as a distinct crossload caution — never a green “direct fit” — with each maker's own conditions attached.

The two directions aren't symmetric. An AeroTech reload in a Cesaroni case is AeroTech's sanctioned “crossload” (a Medusa-nozzle reload needs a single-throat nozzle). A Cesaroni reload in an RMS case is something AeroTech advises against — the RMS case wants a forward seal disc the Cesaroni reload doesn't include, and AeroTech won't warranty it. Either way, a cross-brand motor has to be certified in the hardware it's flown in.

Nothing at 29/38/54 mm is a crossload: no manufacturer or certification body sanctions it, and the closures and reload formats differ, so Muster doesn't show it — a wrong cross-brand pairing is exactly the kind of edge that ends in a CATO.

The reusable metal hardware you buy once, shared across every case length in a diameter. For AeroTech RMS that's the case, a forward closure, an aft closure, and — on the longer cases — a forward seal disc. Cesaroni Pro reuses less: on Pro38 you reuse only the case (both closures ship in the reload), on Pro24/29/54 the case plus a rear closure, and on Pro75/98 the full set. Loki Research reuses the most — the case, the forward bulkhead, and the graphite nozzle all carry over, so its reload is only the liner, grains, o-rings, and a delay or smoke element. Loki's nozzle is sold by throat number and must match the reload; some longer 54 mm reloads need its extended bulkhead.

Everything single-use is in the reload. An AeroTech kit is assembled from parts — grains, liner, nozzle, o-rings, delay element, igniter, and (unless plugged) the ejection charge. A Cesaroni cartridge comes preassembled and loads as one piece. Either way you discard it after the flight and load a fresh one.

A plugged reload has no ejection charge and must be flown with electronic deployment and a plugged forward closure — common on Cesaroni, which sells many reloads in both a delay and a plugged version. A sparky (metal-loaded) propellant is often restricted at the field. Muster flags both.

Each reload shows its certifying body — NAR, Tripoli (TRA), or CAR (the Canadian body that certifies most Cesaroni motors) — as recorded by ThrustCurve, or a caution when none is listed. Certification is what lets you fly a motor at an insured launch; always confirm the current status with the certifying organization, since listings change.

Out of production is not the same as decertified. An out-of-production reload stays flyable until stocks run out; Muster marks it so you know it may be hard to find, not that it's disallowed. Muster never marks a motor decertified on its own — that's a call for the cert organizations, and their notices are authoritative.

The reload catalog — designations, impulse, thrust, delays, propellant, and certification — is mirrored from ThrustCurve, the community motor database, and each reload links back to its page. The mapping of reload to case is ThrustCurve's own per-motor case field.

The hardware graph — the cases, the closures, the seal-disc rules, and the spacer rules from AeroTech and Cesaroni, and Loki Research — is curated by hand from each manufacturer's and its vendors' published hardware, and every part and rule cites its source in the repo.

Reload data fetched 2026-07-15. Reload catalog mirrored from ThrustCurve. Certification org and availability are as ThrustCurve records them; always confirm current status with the certifying body and the reload instructions.