Quick answer
Choose the G53-5FJ for gentle, low-altitude flights and smaller fields; choose the H220T-14A for a strong kick and higher flights when you have more space and a rocket that can handle the thrust.
What sets these reloads apart
Both the G53-5FJ and H220T-14A are reload kits for the AeroTech RMS-29/40-120 system, but they deliver very different flight profiles. The G53 produces a modest average thrust, making it a good choice for lightweight rockets and calm launches. The H220 delivers a much stronger push, so it can lift heavier rockets and reach higher altitudes, but it also demands a larger launch area and a sturdier airframe.
The H220T-14A also requires a 29mm Forward Seal Disc during assembly, which the G53 does not. If you already own the RMS-29/40-120 hardware, you may need to add that part for the H220. Check your hardware kit before you buy.
Both reloads are mid-power RMS products, so they are not compatible with High Power RMS hardware. Make sure your motor casing and closures match the 29/40-120 system.
Trade-offs at a glance
- Thrust vs. altitude: The G53 gives a gentle ride and lower altitude, while the H220 delivers a strong boost for higher flights. Pick the H220 if you want more altitude and have room to track the rocket. Check your field size before choosing the H220.
- Hardware compatibility: The G53 uses the RMS-29/40-120 hardware; the H220 uses the RMS-29/240 hardware and needs a 29mm Forward Seal Disc. Confirm you have the right hardware before ordering. Verify your motor hardware set matches the reload kit.
- Rocket suitability: The G53 is easier on lightweight rockets and less stressful on the airframe. The H220 suits heavier rockets that can handle the higher thrust and requires a larger recovery area. Match the motor to your rocket's weight and structural limits.
Product facts
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AeroTech G53-5FJ RMS-29/40-120 Reload Kit (1 Pack) - 73305: The AeroTech G53-5FJ is a reload kit for the RMS-29/40-120 aluminum cased reusable motor system, assembled by the user with separate motor hardware. You need the RMS-29/40-120 hardware to use this reload, and its gentler thrust suits lightweight rockets and smaller launch fields.
AeroTech G53-5FJ RMS-29/40-120 Reload Kit (1 Pack) - 73305
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AeroTech H220T-14A RMS-29/240 Reload Kit (1 Pack) - 082214: The AeroTech H220T-14A is a reload kit for the RMS-29/240 system and requires installing a 29mm Forward Seal Disc during assembly. This reload delivers a strong kick for higher flights, but you must have the RMS-29/240 hardware and the forward seal disc, and it is not compatible with the 29/40-120 system.
AeroTech H220T-14A RMS-29/240 Reload Kit (1 Pack) - 082214
Which reload fits you?
Best for
- Flyers who want a gentle, low-altitude flight on a lightweight rocket
- Those launching from smaller fields or with limited recovery space
Not for
- Heavy rockets that need a strong kick to leave the pad
- Flyers who want maximum altitude and have a large, open launch area